JPS6312640B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a drum-type washing machine in which a rotating drum is rotated at low speed for washing (rinsing) and rotated at high speed for dewatering.

(b) Prior art When the rotation is suddenly increased from low speed to high speed for dehydration, the arrangement of clothes in the rotating drum tends to be uneven, and a certain vibration is immediately detected and the high speed rotation is interrupted. . Normally, the rotation speed returns to low speed after this, but at this time, even at low speed, the clothes remain hard and tend to fly around inside the drum, making it difficult to unravel them. Therefore, even if the rotor is rotated at a high speed again after a predetermined low speed rotation, the predetermined vibration will still be detected.

(c) Purpose of the Invention The object of the present invention is to suppress vibrations due to flat load during high-speed dewatering rotation by performing an appropriate loosening operation before shifting to high-speed dewatering rotation.

(d) Structure of the Invention In the present invention, as a loosening operation before high-speed dehydration rotation, the operation is performed intermittently in one direction several times at a low speed and for a short time that the rotating drum does not rotate once. Due to this action, the caked clothes in the drum are slightly lifted and then dropped, allowing the individual pieces of clothing to be well dispersed. That is, it can be loosened effectively. Also,
Since the direction is the same as the high-speed dewatering rotation that will be performed thereafter, the transition will be smooth.

(E) Example Fig. 1 is an internal mechanism diagram of a drum-type fully automatic washing machine, and Fig. 2 is an explanatory diagram of piping centered on the outer tank. It is an elastically attached outer tank, and a horizontal axis type rotating drum 3 is installed inside, and a washing motor 4 and a dewatering motor 5, which are three-phase 200V compatible induction motors, are installed in the outer lower part. Motors 4, 5 and pulleys
A rotating drum 3 is rotated by a belt. Here, the washing motor 4 moves the rotating drum 3 at a low speed (approximately 45 rpm).
pm) or balance (approximately 90 rpm) and rotate (or reverse in some cases). In addition, the dehydration motor 5
Rotate in one direction at low (approx. 425r.pm) or strong (approx. 850r.pm). When the balance rotation continues in one direction, the clothes inside the rotating drum become stuck to the inner surface of the drum due to centrifugal force.

6 is a water supply source, which is connected to the outer tank 1 through a small diameter detergent input passage 9 through a detergent input valve 7 and a detergent cup 8, and through an auxiliary agent input valve 10 such as a softer and an auxiliary agent cup 11. A small-diameter auxiliary agent input channel 12 connected via a water supply valve 13 and a large-diameter water supply channel 14 connected via a water supply valve 13 are provided in parallel with each other.

15 is a hot water source (boiler, etc.), and hot water valve 1
It is connected to the outer tank 1 via 6.

17 is a steam source, which is connected to the lower part of the outer tank 1 via a steam valve 18.

Reference numeral 19 inputs the ejection power of the steam source 17 into the ejector 20, and connects the flexible hose 2 from the bucket 21 containing the glue.
A glue inlet valve 23 is inserted in the glue inlet passage for sucking up the glue and feeding it into the outer tank 1 through the outer tank 2.

Note that the hot water source 15 is not particularly necessary if the steam source 17 is present. Moreover, if the steam source 17 is not available, a pump 24 is separately connected to the glue input path 19 to serve as the input source.

25 is a drainage channel connected to the lowest part of the outer tank 1;
A drain valve 27 is inserted after the air trap 26 is branched. The air trap 26 is connected to liquid level switches 28, 29, 30, 31 via pressure hoses.
These switches control the liquid level at low (1/10 of the outer tank radius), medium-low (also 3/10), medium-high (also 5/10), and high (also 7/10), respectively. It is detected and activated.

Reference numeral 32 denotes a temperature detection element made of a thermistor or the like that detects the temperature of water or the like existing in the outer tank 1 and outputs a detection signal.

A vibration switch 33 is fixed to the main body 2, and an operating rod 34 is inserted into an inverted U-shaped detection fitting 35 fixed to the outer tank 1. This vibration switch 3 is activated when vibration occurs due to a flat load of 2 kg during mild dehydration rotation. Furthermore, with this setting, the operating load of the vibration switch 33 during balance rotation (90 rpm) is 6 kg. That is, this vibration switch 33 detects vibrations due to a flat load of 6 kg during balance rotation, and vibrations due to a small flat load of 2 kg during weak dehydration rotation.
Therefore, strong dewatering is not permitted if there is small vibration, so it is safe even if the strength of the component parts is low.
In the end, we were able to reduce material costs while maintaining safety.

Figure 3 is a block diagram of a microcomputer (hereinafter referred to as microcomputer) that controls the process of this drum-type fully automatic washing machine. 38 is a read/write memory (hereinafter referred to as RAM) that is powered by a battery (not shown) so that the stored contents can be retained even in the event of a power outage or power outage, and 39 and 40 are first and second inputs. It is an output interface. These are connected to each other by a data bus, an address bus, and a control signal. Incidentally, the backup battery of the RAM 38 may be charged when energized and serve as a power source during a power outage or the like.

41 is a display device connected to the first input/output interface 39, and as shown in FIG. "Cold water", "Hot water",
"Auxiliary agent", "Glue", "Low rotation", "Low", "Medium low",
Indicator lights (using segments of indicator tubes) that light up in response to each state: "medium/high", "high", and "drainage only" 4
4... and the light emitting diodes (hereinafter referred to as It is equipped with 45... (referred to as LED).

46 is a D/O that converts the digital signal for temperature setting from the first input/output interface 39 into a voltage.
The A converter compares the terminal voltage of the temperature sensing element 32 with the comparator 47 to measure the temperature.

48 is a 6×4 matrix type keyboard connected to the first input/output interface 39, and as shown in FIG.
"Temperature", "Cold water level", "Hot water level", "Auxiliary agent", "Glue",
"Strength", "Exclusion", "Program", "Call", "
It is provided with function keys 50 for "write", "fast forward", and "start/stop".

The first input/output interface 39 has a built-in timer consisting of a counter and a working RAM. This interface 39 further includes a start switch 51 that tells whether to start time counting with a water level signal or with both water level and temperature signals, a steam switch 52 that tells whether or not there is a steam source 17, Glue switch 53 tells you whether to automatically or manually add the washing water, and tells you whether to perform a so-called cool-down in which water is mixed to lower the temperature to prevent wrinkles when the temperature of the washing water is 50°C or higher. Each input signal is input from the cool-down switch 54 as necessary.

The second input/output interface 40 includes the liquid level switches 28, 29, 30, 31, a vibration switch 33, a thermal switch 55 that operates safely when the motor overheats, and a door switch 56 for the rotating drum 3.
Enter each from The second input/output interface 40 outputs a low speed reversal signal or a balance rotation signal to the washing motor 4, a weak spin rotation signal or a strong spin rotation signal to the dehydration motor 5, and cools each motor 4, 5. Open/close signals are output to the blower motor 57 of the fan, the water supply valve 13, the detergent injection valve 7, the auxiliary agent injection valve 10, the steam valve 8, the drain valve 27, the hot water valve 16, and the glue injection valve 23, respectively.

Next, ROM37 so that it does not disappear semi-permanently
Figure 6 shows only five of the ten driving programs (courses) stored in the machine. Here, as mentioned above, there are 7 steps from "prewash" to "dehydration", but the time is set for the "wash" step and the preceding stage of each "rinse" step, regardless of the set time of each step. A small step of ``drainage/slight dehydration'' is included. The time in FIG. 6 is the set time for each stroke, and the time is counted according to the water level or the water level and water temperature according to the operation of the opening switch 51. The cold water level is the set water level, and the temperature is the set temperature. Strength indicates the strength of washing and rinsing.
At high, the rotating drum 3 is reversed from side to side in a cycle of 8 seconds (rotation) - 1.5 seconds (pause), and at weak, it is reversed in a cycle of 2 seconds (rotation) - 8 seconds (pause). Also,
"Water" in temperature means the raw feed water without heating, and "mild" in the "dehydration" step means mild dehydration.

To explain the operating procedure using the driving program "P15" as an example, first press the "program" key 50 and press "15" using the number keys 49, 49. Then, the time display tube 42 displays "P" and the temperature display tube 43 displays "P".
displays “15”. Here, "Call" key 5
Press 0 or "Start/Stop" key 5
0, or press the "Call" key 50 and then press the "Start/Stop" key 50. Among the LEDs 45 for displaying the stroke, the one that corresponds to the set stroke, and in "P15" all of the LED4
5... lights up and the first "prewash"
LED45 blinks. While the process is in progress, the LEDs corresponding to the process in progress flash in sequence. "Fast forward"
Each time the key 50 is pressed, the process progresses and the corresponding process (the process where the LED is flashing) is immediately terminated. This rapid forwarding can be executed with the stroke temporarily stopped while the stroke is actually in progress.

If you press the "Start/Stop" key 50 after "P15" is displayed on the display tube 42, or if you press the "Call" key 50 and then press it, the process of "P15" will be executed, and this "Start/Stop" key will be executed during execution. Pressing the "Stop" key 50 will stop the process, and pressing it again will restart it. This operation program starts with the "prewash" step, but the time display tube 42 and temperature display tube 43 display the actual time and water temperature of the "prewash" step, and each indicator light 44... displays the setting status. are doing. A similar display will be made in each of the following steps. In the "pre-washing" process, the water temperature is set to 60℃ and the water level is set to medium-low, so steam is added to heat it while water is being supplied to medium-low. This steam is ejected a little later than the water supply. The water level is detected by a liquid level switch (medium/low) 29, and the temperature is detected by a temperature detection element 32, and the water supply valve 13 and steam valve 18 are controlled to open and close based on the respective detection signals. The same goes for controlling the water level and temperature in each stroke. Incidentally, when the water temperature falls below -2° C. from the set temperature, the steam valve 18 is automatically opened to heat the water.

After the "pre-washing" process is completed, "draining/mild dehydration"
A small step is involved. Here, first, 3 seconds (clockwise rotation) - 2 seconds (pause) - 3 seconds (clockwise rotation) - 2 seconds (pause)
A low speed reversal of -5 seconds (counterclockwise rotation) is performed without draining water, followed by a balance rotation (counterclockwise rotation), at which vibration detection is performed by the vibration switch 33. If there is a predetermined vibration (corresponding to a flat load of 6 kg or more), it returns to low-speed counterclockwise rotation, performs balance rotation again after 5 seconds, and performs vibration detection. If the vibration is below a predetermined level, water is drained for the first time while continuing balance rotation. Incidentally, it is possible to arrange the clothes more uniformly in the rotating drum 3 by inverting the clothes while soaking them in water. 40 seconds after the liquid level switch (low) 28 is reset, the balance rotation shifts to weak dehydration rotation (counterclockwise rotation) for 30 seconds. This time of 30 seconds is fixed so as to ignore even if the vibration switch 33 detects vibration corresponding to a flat load of 2 kg or more during this weak dehydration rotation. That is, the purpose of detecting vibrations during weak spin-drying is to ensure safety during the next strong spin-drying, and even if vibrations occur during weak spin-drying, there is no problem in terms of strength as long as the weight is 6 kg or less.

When the weak dehydration rotation (30 seconds) is completed, inert rotation is performed for 15 seconds, and low-speed reversal (loosening rotation) is performed for 30 seconds in a cycle of 3 seconds (rotation) - 2 seconds (pause).

The washing motor 4 is reversed by changing the power supply, and when changing from low speed to balance, the connection is changed from △ to ⓓ. This is shown in FIG. In the figure, switches 58 and 59 are alternately closed during low-speed reversal during washing and rinsing. At this low speed, the connection is △. During the subsequent balance rotation, switch 60... and switch 6
1... is closed, but since this is a 〓 connection,
The number of rotations is doubled.

Incidentally, similarly to the washing motor 4, the dehydration motor 5 also changes the winding of △1〓 by switching the switch groups 58'..., 60'...
..., 61'..., weak dehydration rotation (425r.pm) is performed for the △ connection, and strong dehydration rotation (850r.pm) is performed for the 〓 connection.

Therefore, when changing the winding of the washing motor 4, switches 60..., 61 must be turned on to prevent short circuits.
It is necessary to completely open and then close the switch 59, which takes approximately 0.2 seconds. Therefore, in the stage before dewatering, water is not drained to improve balance and the load is increased, so during the pause (0.2 seconds) when transitioning from low speed rotation to balance rotation, the dehydration is greatly reduced, and the previous low speed is Clothes that were loosened by inversion may become hardened.

Therefore, for about 2 seconds including this 0.2 seconds, the dehydration motor 5 is driven at a rotational speed suitable for weak dehydration to prevent the rotary drum 3 from decelerating. This operation is shown in the flowchart of FIG. Here, first, the counter for the "dehydration" process is cleared, and the setting status of this process is displayed. If the counter is 0, the washing motor 4 is reversed at a low speed, and this is performed for 15 seconds.This time is determined and 50 is entered in the ON/OFF counter. This ON/OFF counter is 10
Since the count indicates 1 second, 50 counts will count 5 seconds. This 5 seconds is the time for balance rotation. After 50 is entered, +1 is entered into the counter. Then, the discrimination result of the counter becomes 1, so the contents of the ON/OFF counter become
It will be determined whether it is 48 or less. That is, it is determined whether 0.2 seconds have passed. If 0.2 seconds have not elapsed, check whether the ON/OFF counter content is 30 or less.
That is, it is determined whether two seconds have passed. If the time has not elapsed, the dehydration motor 5 will rotate weakly and this will continue for 2 seconds. The above-mentioned determination and processing are performed until 0.1 second (the count number of the ON/OFF counter is 1) has elapsed, and then the contents of the ON/OFF counter are decremented by 1 to become 49. This is compared with 0, and since it is not true and the counter content remains 1, the determination and processing are performed again just because the ON/OFF counter content has changed from 50 to 49. However, the discrimination result is the same for 50 and 49, so another 0.1 second elapses, a total of 0.2 seconds, and the ON/OFF
Leave the counter content as 48 and the counter content as 1. Then, since it is determined that they are the same at 48, the balance rotation of the washing motor 4 starts. Further, the dewatering motor 5 is also rotating weakly. Each time this operation is repeated, the content of the ON/OFF counter is -1
It is subtracted by -20 (2 seconds) and becomes 30, then 30
Since it is determined that they are the same, the dewatering motor 5 stops. Further, when this operation is repeated and the contents of the ON/OFF counter become 0 after 5 seconds, the balance rotation also stops. Then, the content of the counter is incremented by 1 and becomes 2, and based on the determination result, the process moves to the next operation of the "dehydration" process.

If the cool down switch 54 is set,
Water is automatically supplied during the last minute of a process where the set temperature is 50℃ or higher. Water can be supplied up to a water level one step higher than the water level set in each stroke. In this "pre-washing" process, water can be supplied at medium-high water because it is medium-low. As a result, the water temperature is usually 50℃
Since the temperature is lowered and the clothes are cooler, they are less likely to wrinkle. That is, this cool-down is an operation to prevent wrinkles. Note that the water supply may be started as long as it is before draining, and an appropriate point other than 1 minute before the end can be adopted depending on the water supply amount, outer tank capacity, etc. This cool-down operation is shown in the flowchart of FIG. Here, the steam valve 18 is opened and closed to prevent the set temperature from dropping below -2°C, and during the set time of the washing and rinsing processes in which the washing motor 4 is rotating at low speed, one minute before the end. , it is determined whether the set temperature for that process is 50°C or higher, and if not, the process moves to the next process after the set time has elapsed. If the set temperature is 50℃ or higher, check to see if the liquid level switch one step higher than the set water level is tripped. If it is not tripped, open the water supply valve 13.
One minute before the end of this period, the steam valve 18 is no longer opened and heating is no longer performed. If the level switch trips before the end, the water supply valve 13 closes and a low water temperature, slow reversal is performed until the end of the time to cool the clothes. If the water does not trip before the end of the time, turn off the water supply valve 1 after the time ends.
Close 3.

Further, when the cool-down switch 54 is set, even if the water is supplied to the water level one step higher, nothing will happen unless the temperature drops sufficiently. Therefore, although water is automatically supplied during this setting, the end of the water supply can be determined depending on the actual water temperature. That is, the temperature sensing element 32 detects that the actual water temperature is 40°C.
Water supply is terminated when it detects that: This operation is shown in the flowchart of FIG. Here, the water temperature is controlled to be the set temperature by opening and closing the steam valve 18, and the washing motor 4 is rotated at low speed. When the set time for this washing and rinsing process reaches a predetermined time, it is determined whether the set temperature for that process is 50°C or higher,
Otherwise, the process moves to the next step after the set time elapses (ends). If the temperature is 50°C or higher, it is determined whether the water temperature in the outer tank 1 is at a specified temperature (40°C in this case), and if it is higher than 40°C, the water supply valve 13 is opened to supply water. When the set time becomes shorter than the predetermined time, the temperature control by steam is stopped and the water temperature decreases during the slow reversal. In most cases, the water temperature will rise before the end.
The temperature becomes 40°C or lower, the water supply valve 13 is closed, and the set time period ends thereafter. If the temperature is still higher than 40°C after the end, close the water supply valve 13 after the end.

After such a small process of "draining/slightly dehydrating", a "washing" process is performed. Here, detergent is added for 40 seconds. That is, the water supply valve 13 is opened to allow only water to enter the outer tank 1, and then, at the same time, the detergent input valve 7 is also opened to allow the detergent solution to enter the outer tank 1.
After this, the water supply valve 13 is closed. Since the water pressures in the water supply channel 14 and the detergent input channel 9 are divided, the detergent solution is not sprayed strongly from the beginning. Also,
In order to prevent the detergent solution from immediately escaping into the drainage channel 25, water is simply supplied at first. Detergent injection valve 7
It opens and closes for 40 seconds, and then the water supply valve 13 opens again until the set water level is reached. Steam is also blown out, so the temperature reaches the set temperature.

In this way, when adding detergent, water is simply supplied first, but this water supply method is the same when adding auxiliary agents such as softer and glue. Also, when adding auxiliary agents, initially partial pressure water is used.

When the specified "washing" process is completed, "drainage/washing" is completed.
"Mild dehydration" and "Rinse 1" start. Thereafter, each process progresses, and in the "rinse 4" process, the glue injection valve 23 is opened for 20 seconds, the steam from the steam source 17 creates negative pressure in the ejector 20, and the glue is sucked up from the bucket 21 through the hose 22. , and input. A pump 24 may be used instead of the steam source 17. If the glue is to be added manually, the glue switch 53 is set to manual. Then, in this "Rinse 4" process, after water is supplied for 10 seconds at the beginning of the process, a buzzer sounds and water supply is interrupted. Here, the glue injection valve is manually opened for a predetermined period of time to charge the glue.
When the "Start/Stop" key 50 is pressed after the valve is closed, the water supply is restarted, the water is supplied to the set water level, and the process proceeds. When this "rinsing 4" step is completed, the process moves to the "dehydration" step.

In the "dehydration" process, you can select "weak dehydration" or "strong dehydration".
The operation is the same as the short stroke of "weak dehydration", but the rotation time of the "weak dehydration" can be set arbitrarily. In this "P15" operation program, the "dehydration" step is "strong dehydration", so the operation in this case will be explained below.

Following the end of the previous process, the rotating drum 3 rotates at low speed for 3 seconds (rotation) - 2 seconds (pause) once on each side without draining water, and then rotates to the left at low speed for another 5 seconds before transitioning to balance rotation. Then, the vibration switch 33 starts vibration (corresponds to flat load of 6 kg or more).
is detected. If there is vibration, it returns to low speed rotation and shifts to balance rotation again, and the vibration is detected. During this time, no water was drained. When there is no vibration or no vibration, drainage starts during balance rotation, and 40 seconds after the liquid level switch (low) 28 is reset, weak dehydration rotation is performed for 30 seconds. Incidentally, when changing from low-speed rotation to balance rotation, the dehydration motor 5 rotates for 2 seconds when the winding is changed to prevent the rotation speed of the rotary drum 3 from decreasing, as described above.

The vibration switch 33 is set to 2 during the 30 seconds of weak dehydration rotation.
Vibrations corresponding to flat loads of Kg or more are detected.
If there is no vibration, weak dehydration rotation is continued for another 10 seconds, then the winding of the dehydration motor 5 is changed to the wire connection, and strong dehydration rotation is performed at 850 rpm. The time for this strong dehydration rotation is a set time.

If there is vibration during weak dehydration rotation, inert rotation (15
seconds) followed by a low-speed reversal (rotation to untwist clothing) with a cycle of 3 seconds (rotation) - 2 seconds (pause).
7 cycles starting from left rotation, followed by 3 cycles of intermittent rotation at a low speed of 0.5 seconds (counterclockwise rotation) - 1 second (pause) (dispersed rotation to separate clothes), and then 3 seconds of low speed rotation to the left. Afterwards, shift to balance rotation. In this state that water has already been drained, the rotating drum 3 is rotated intermittently for a short period of time, not rotating once, in order to maintain balance.
The rotation has been devised. When transitioning to balance rotation, there is no load called water this time, so there is no need to consider torque too much. Therefore, at this time, switch 59 is opened and switch 61 is opened.
. . . and 0.2 seconds later, switch 60 . . . is closed. Then, when the △ connection was formed by closing the switch 59..., the switch 61...
Due to the closure of ..., the state of △ connection remains transiently before becoming 〓 connection. Therefore, the washing motor 4 rotates with low torque and a large slip, but at a higher rotation speed than the low speed rotation, and the switch 60...
Balance rotation by connecting the wires is performed for the first time after the wires are closed. As a result, the 0.2 second pause in the rotating drum 3 is substantially eliminated.

After the balance rotation, a weak dehydration rotation is performed for 10 seconds, and during this time, the vibration switch 33 detects the vibration of the permissible flat load of 2 kg, and if there is any vibration, it immediately starts the last cycle of the 7-cycle low-speed reversal (loose rotation). Return to (3 seconds counterclockwise rotation - 2 seconds pause). Then, the cycle shifts to intermittent rotation, balance rotation, and weak dehydration rotation, and if vibration is detected during the weak dehydration rotation, the process returns to the last cycle of low-speed reversal. If there is vibration, repeat this, and if it continues 5 times, it will return to the beginning of low speed reversal (7 cycles). While detecting vibrations in this way, if the vibrations disappear, the weak dehydration rotation is performed for a complete 10 seconds, and then the strong dehydration rotation is performed.

In any case, after shifting to strong spin rotation and the set time has elapsed, it will shift to inert rotation for 15 seconds - weak spin rotation for 3 seconds - inert rotation for 15 seconds, then 3 seconds (rotation) - 2
The "dehydration" process is completed by performing slow reversal for 30 seconds (6 cycles). If vibration corresponding to a constant flat load occurs for some reason during this strong dehydration rotation, the vibration switch 33 is activated and the last cycle (3 seconds left) of the 7-cycle low-speed reversal described above is immediately activated. Return to rotation - 2 seconds pause), intermittent rotation - balance rotation (5 seconds) - mild dehydration rotation (10 seconds)
Then, the vibration detection is performed again during this weak dehydration rotation. Then, the process is similar to that described above, and the process shifts to strong dehydration rotation again.

Then, the buzzer sounds as the "P15" driving program has finished.

The intermittent rotation operation in this "dehydration" process is
This is shown in the flowchart in Figure. Here, the counter for the dehydration process is first cleared, this process is displayed, and the contents of the counter are determined. Since the initial value is 0, the washing motor 4 is rotated counterclockwise at low speed.
Stop after 0.5 seconds and add +1 to the counter.
When the content of the counter becomes 1, 1 is further added to the counter after 1 second has elapsed to make it 2. Hereinafter, when the counter contents are 2 and 4, the washing motor 4 is rotated counterclockwise at low speed for 0.5 seconds as shown in A in the figure, and when the counter contents are 3 and 5, it is stopped for 1 second as shown in B in the figure. After this, although it is omitted in this flowchart, when the counter value reaches 6, the washing motor 4 is rotated to the left at low speed for 3 seconds, and the counter value reaches 7.
When this happens, a balance rotation is performed as shown in the figure.

In addition, “strong dehydration” and “weak dehydration” in the “dehydration” process
The operation (the intermittent rotation operation is explained in FIG. 11 and will be omitted) is shown in the flowchart of FIG. 12. Here, first, the counter is cleared, the process is displayed, and the strength or weakness of dehydration is determined. If the setting is weak, it is determined that the counter content is 0, and a loosening operation is performed. When this is done for a predetermined period of time, the content of the counter is set to 1, and A
Return to Next, it is determined that the content of the counter is 1, and balance rotation is performed, during which vibration is detected by the vibration switch 33. If there is vibration corresponding to a flat load of 6 kg or more, the contents of the counter are cleared and returned to A in the figure. That is, after performing the loosening operation A again, the balance rotation is performed. and,
Vibration is detected, and if vibration is detected, loosening operation and balance rotation are repeated. No drainage was performed during this time. If there is no constant vibration, the balance rotation will continue for a predetermined period of time (until 40 seconds after the water is drained and the liquid level switch (low) 28 is reset), and then the balance rotation will stop. Then, 1 is added to the counter and the process returns to A in the figure. Next, since the content of the counter is 2, the dehydration motor 5 is rotated slowly (425r.p.
m) for 30 seconds during the "draining/slight dehydration" short process.
The "dehydration" process is stopped after a preset time. During this time, the content of the counter is 2, so weak dehydration is performed regardless of the result of vibration detection by the vibration switch 33. After this, it coasts for 15 seconds, followed by a cycle of 3 seconds (low speed) - 2 seconds (pause), alternating left and right for a total of 30 seconds.

If the dehydration setting is strong, the counter content will be 0.
It is determined that this is the case, and a loosening operation is performed. When this is done for a predetermined period of time, the contents of the counter are set to 1.
Then, return to A in the figure. Next, it is determined that the content in the counter is 1, and balance rotation is performed, during which vibration is detected by the vibration switch 33.
If there is vibration corresponding to a flat load of 6 kg or more, the contents of the counter are cleared and returned to A in the figure. Therefore, exactly the same behavior as the weak setting is occurring. If there is no constant vibration, the balance rotation will stop 40 seconds after draining and resetting the liquid level switch (low) 28. 1 is added to the contents of the counter, and the process returns to A in the figure. Next, it is determined that the content of the counter is 2, the dehydration motor 5 is rotated weakly, and vibration is detected by the vibration switch 33 during rotation for 30 seconds. When a vibration corresponding to a flat load of 2 kg is detected, the weak rotation is stopped and the inert rotation is performed for 15 seconds, and the contents of the counter are cleared and returned to A in the figure. If no vibration is detected, it will rotate slightly for another 10 seconds and cut off the weak rotation signal.
Add 1 to the counter.

When a certain amount of vibration is detected and the counter is cleared, a loosening operation is performed in the draining state, and after a balance rotation, when the counter reaches 2,
Vibration is detected during 10 seconds of gentle dehydration rotation. Here, too, as soon as a certain amount of vibration (corresponding to 2 kg) is detected, the counter is cleared and the process returns to A in the figure, this time the loosening operation 2 is executed, and the same operation is repeated thereafter.
If the counter content is 2 and no vibration is detected during weak dehydration rotation, 1 is added to the counter content. In this way, the weak dehydration rotation is performed for 10 seconds, and then the strong dehydration rotation is started. During this strong dewatering rotation, vibrations are not detected unless there is an accident in which mechanical fixing means or the like is damaged, but vibrations are detected by the vibration switch 33 for safety reasons. If vibration is detected here, the operation is repeated from loosening operation 2.

When the strong dehydration rotation is performed for the set time, 15 seconds of inertia rotation - 3 seconds of weak dehydration rotation - 15 seconds of inertia rotation, then 3 seconds (low speed left rotation) - 2 seconds (pause) - 3
Seconds (slow clockwise rotation) - total 30 cycles called pauses
Runs for seconds and exits. The buzzer will sound when it ends.

Here, loosening operations A and B are 3 seconds (low speed left rotation) - 2 seconds (pause) - 3 seconds (low speed right rotation) - 2 seconds (pause) - 5 seconds (low speed left rotation).
In addition, the loosening operation is performed by performing 7 cycles of 3 seconds (low-speed rotation) - 2 seconds (pause) alternately on the left and right, then 3 cycles of 0.5 seconds (low-speed left rotation) - 1 second (pause). After this, intermittent rotation is performed for 3 seconds (low-speed left rotation). Further, the loosening operation 2 starts from the last cycle of the 7 cycles of low speed reversal of the loosening operation C, and intermittent rotation is performed.

Furthermore, it will be explained based on FIG. 13 that when the washing motor 4 is changed from the △ connection to the ⓓ connection, the irregular △ connection remains temporarily. Here, to simplify the explanation, 4-pole-2-pole switching will be explained using a 24-slot winding. In 4-pole △ connection, U
A three-phase current flows as shown by the → mark, from V by the → mark, and from W by the mark, and as a result, a four-pole magnetic field is generated in the winding as a rotating magnetic field. This is slow rotation. Next, open the switch 58 and switch 61.
is closed and switch 60 is still open.
Three-phase current flows in the order of R→T→S. Although this is a Δ connection, a two-pole magnetic field is generated in the winding. However, as is clear from the drawing, when the current flows from R as marked →, the current flows in slots Nos. 3 and 4, when it flows from T as marked →, it flows in slots Nos. 19 and 20, and when it flows from S as marked, it flows in slots Nos. 11 and 12. They cancel each other out, and the rotating magnetic field is small. Therefore, although the slip is large and the torque is small, the rotation of the rotary drum 3 is maintained to some extent because the power is not turned off.

After this, when the switches 60 and 61 are closed, the two-pole connection is completed and balance rotation occurs.

Note that the speed of the washing motor 4 in the embodiment is changed by switching between 6 poles and 12 poles.

In Figure 6, "P17" is an operation program for wool, thin materials, etc. that cannot be treated with a dry cleaner, and the "prewash" and "rinse 1" steps are omitted, and the settings are ” has changed.

“P22” is an operation program for cleaning the rotating drum 3.

"P23" is an exercise program for manually operating the detergent input valve 7, water supply valve 13, hot water valve 16, steam valve 18, and drain valve 27 by separating them from microcomputer control, and allows the user to freely adjust various setting values. Decide and execute. Therefore, the fuselage is equipped with a knob for manual operation. Manual operation includes electrically operating each valve by knob operation. In this operating program, the glue injection valve 23 will also be manually operated.

"P24" is an exercise program in which only the "dehydration" step is executed independently.

Settings during each step of the operating program representatively shown in FIG. 6 can be changed and registered as a new operating program. This setting change is performed in response to the "function" key 50.

For example, for "P15", first press the "program" key 50, press the "number" keys 49, 49 as "15", and then press the "call" key 50.
"P15" in the ROM 37 is called to the RAM of the first input/output interface 39. Then, the LEDs 45 corresponding to "prewash" to "dehydration" light up, the LED 45 corresponding to "prewash" blinks, and the time and temperature display tubes 42, 43 and the indicator light 44 light up.
...displays the settings for the "prewash" process.
When you press the "Call" key 50, the LED 45 for the next step
blinks, indicating the setting status of the next step.Tubes 42, 43
and the indicator light 44... is displayed by lighting.

At each step of the operation program called up in this way, the "time" key 50 is pressed and the "number" key 49 is pressed.
If you press ..., the set time for the trip will be changed to the time (minutes) of the number you pressed. The temperature (°C) is also changed by the same operation. For the water level (cold/hot), "1" on the "number" key corresponds to "low,""3" corresponds to "medium-low,""5" corresponds to "medium-high," and "7" corresponds to high. , you can change it accordingly. “Auxiliary agent” key 50
And the glue switch 53 automatically presses the "glue" key 5
If you press 0 and then press the "number" key, you can change the time (seconds) to the number you pressed (up to 99 seconds).
The detergent injection time is changed using the "auxiliary agent" key 50. When the glue switch 53 manually presses the "glue" key 50, interruption of water supply for gluing is set, and when it is pressed again, gluing is not performed.
When the "strong/weak" key 50 is pressed during the washing/rinsing process, it changes to "weak", and when pressed again, it returns to "strong".
By performing this operation during the "dehydration" process, you can change between "strong dehydration" and "weak dehydration". You can change the time for “mild dehydration”. When you press the "eject" key 50,
In the small step of "draining/slightly dehydrating", it will only drain water and will no longer perform mildly dehydrating, and if you press it again, it will return.

After making changes to one operation program in this way, specify addresses from "P1" to "P14" by pressing the "program" key 50 and the "number" key 49..., and then press the "write" key 50. If you keep pressing it for 2 seconds, a new driving program will be transferred to RAM 38 and stored. When this task is finished, a buzzer will sound. If you want to immediately execute the newly created operating program, you can press the "Start/Stop" key 50 after the buzzer sounds.

The operation programs stored from "P1" to "P14" can be changed by the same operation as described above. Moreover, when one of "P1" to "P14", for example "P10", is to be slightly changed, if the "write" key 50 is pressed after the change operation, "P10" is partially corrected and stored.

Next, a case will be described in which the hot water source 15 is substituted because the steam source 17 is not available. In this case, the steam switch 52 is switched to the side without the steam source. Then,
If the water temperature is within ±10°C of the set temperature for each stroke, no error signal will be generated and the stroke can be executed. On the other hand, when setting the water level, it is necessary to set both the cold water level and the hot water level in consideration of the temperature.

For example, if the hot water supply temperature of the hot water source 15 is 80°C, the water is supplied at a ratio of temperature 2 to 1 in order to obtain a water temperature close to 60°C in the "prewash" step of "P15". In this case, the settings are to call the "prewash" process of "P15", set the cold water level to "1" (low), and set the hot water level to "3".
(medium/low). Then, after water is supplied to the low water level, hot water is supplied from the low water level to the mid-low water level, making it possible to bring the temperature of the mixed water close to 60°C. When the hot water source 15 is substituted in this way, the mixing ratio of water and hot water is determined in consideration of the set water level and the seasonal water temperatures.

If the cold water level and hot water level are set to the same water level, this operation will leave the water level operated later, that is, if the setting operation is performed from cold water level to hot water level, the set water level of the hot water level will remain.

Also, here, water (hot water) is supplied from the side where the water level is set lower, and hot water (water) is supplied from the side where the water level is set higher for the remaining water level. This operation is shown in the flowchart of FIG. Here, we first calculate the difference between the set values for the cold water level and the hot water level, and if the set value for the cold water level is large, we check to see if the liquid level switch for the water level set as the hot water level has tripped, and until it trips, the hot water level is supply. When a trip occurs, the hot water valve 16 is closed, a check is made to see if the liquid level stop at the water level set as the cold water level is stopped, and water is supplied until the water level is tripped. When tripped, the water supply valve 13 is closed.

If the hot water level setting is higher, the trip state of the liquid level switch on the cold water level side is checked first and water is supplied first. Then, hot water is supplied.

Furthermore, if the hot water supply temperature of the hot water source 15 is 80 degrees Celsius and the set temperature is 60 degrees Celsius, if the water level is not set incorrectly and the cold water level is not set, it will be stored as an operating program, but when executed is display tube 42,4
3. An error message will be displayed and the process will be interrupted.
Also, since the detergent injection valve 7 is opened at the same time, the cold water level can be set appropriately and the allowable temperature range (±10
℃), water is supplied from the small-diameter input channel 9.

In this embodiment, the RAM 38 is backed up by a battery power source, but the battery power source is omitted and the RAM 38 is backed up by an E-E-PROM (Electric Erasable Programmable ROM).
(Electrically erasable and writable any time write,
(read memory) may be used instead. This E-E-
PROM retains its written contents even when the power is turned off.
Moreover, when it is desired to change the contents, the written contents can be erased by electrical processing and new contents can be written.

(F) Effects of the Invention According to the present invention, the loosening operation before high-speed dehydration rotation is effective, and since the rotation direction is the same,
Vibrations caused by flattened loads can be suppressed, resulting in smooth transition. Therefore, it is possible to provide a drum-type washing machine that is highly safe and wastes less time due to vibration detection and processing.

[Brief explanation of the drawing]

Fig. 1 is an internal mechanism diagram of a drum-type fully automatic washing machine according to the present invention, Fig. 2 is an explanatory diagram of piping, Fig. 3 is a block diagram, Fig. 4 is an explanatory diagram of the display device, and Fig. 5 is a diagram of the keyboard. Key layout diagram, Figure 6 is the program diagram, Figure 7 is the motor electrical connection diagram, Figures 8 to 1.
2 and 14 are flowcharts, and FIG. 13 is an explanatory diagram of the motor connections and windings. 3...Rotating drum, 4...Washing motor, 5...
Dehydration motor, 33...vibration switch.

Claims (1)

[Claims] 1. When a rotary drum is rotated at low speed by a motor for washing and at the same time rotated at high speed for dehydration, a loosening operation is arranged before the rotary drum is rotated at high speed. A drum-type washing machine comprising intermittent rotation in which the intermittent rotation is made several times in one direction at a low speed for a short period of time, not more than one rotation, and the direction of the intermittent rotation is the same as the direction of the high-speed rotation.