JP3448903B2 - Drum type washing machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum type washing machine for rotating a drum for storing clothes for washing.

[0002]

2. Description of the Related Art In recent years, drum type washing machines are gaining popularity in the market due to the fact that they are easy to systemize because their forms are unitized. Its main mechanical internal structure is a drum that houses and rotates clothes, and a receiving cylinder that houses the drum and is supported from the housing by an appropriate supporting means such as a spring or a vibration suppression damper. The rotation of the motor attached to the receiving cylinder is transmitted to the drum by an appropriate rotational force transmitting means, and washing, rinsing, dehydration and drying are performed.
In addition, the majority of these controls are relatively simple ones in which the process program only progresses with time. Therefore, most of the optimum process control by fine state control was still undeveloped.

[0003]

The drum-type washing machine and drum-type washing / drying machine having such a simple structure have the following problems.

That is, in the case of a drum type washing machine, since the rotating shaft of the drum is horizontal, the clothes accommodated inside are gathered under the drum from the beginning due to the action of gravity.
The imbalance of the cloth is liable to occur during the dehydration, and the vibration noise becomes large. Especially , regarding the vibration, resonance occurs at a specific drum rotation speed determined by the cloth amount inside the drum, and the vibration amount becomes extremely large. . Conventionally, dehydration is performed without knowing the number of rotations of the drum that causes vibration resonance, which may be a very serious problem in terms of vibration reduction and safety measures.

Further , although the resonance rotational speed varies depending on the amount of cloth, the dewatering start-up method is uniform, so that various harmful effects occur. In particular,
Conventionally, in a predetermined drum rotation speed region where resonance rotation speed is considered to exist, by increasing the drum rotation speed increasing speed and allowing this region to quickly pass,
Measures have been taken to reduce the effect as much as possible.

On the other hand, however, the rapid increase in the dewatering rotation speed means that the generation rate of water squeezed out from the cloth becomes very high, and the drainage cannot catch up with the ability of the drainage pump. At the time of dehydration immediately after washing before the transition, a large amount of bubbles may be generated, and dehydration may not start. Therefore, it is necessary to realize an optimum dewatering start sequence according to the amount of cloth in the drum.

In view of these problems described above, the present invention is under dehydration.
The vibration resonance of the drum in
Achieves the optimum dehydration startup sequence according to the amount of cloth inside
The purpose is to let.

[0008]

To accomplish the above SL objects of the problem solving for the means for the] comprises a rotating drum accommodating clothes, a receiving cylinder that houses the <br/> drum, and a control unit , Said control
The part is a cloth amount detecting part for detecting the amount of cloth in the drum, and
Estimate the vibration resonance rotation speed during dehydration from the output of the cloth amount detection unit
Resonance rotation speed estimating section, and output of the resonance rotation speed estimating section
A dehydration process control unit that controls the rotation of the drum according to
Having, the dehydration process control unit, of the resonance rotation speed estimation unit
Increase the drum rotation speed during dehydration at an ascending speed according to the output.
It was made to be able to.

[0009]

The present invention has the structure described in claim 1 above.
It is possible to judge beforehand the resonance speed of the drum according to the amount of cloth.
It becomes possible to respond to the problems that are predicted in the process execution
Resonance speed estimation unit
Determines the increase speed of the drum rotation speed during dehydration according to the output of
By doing so, the optimum dehydration start-up according to the condition of the clothing
Can be realized.

Further , according to the structure described in claim 2,
Passes through the resonance point at high speed even in the case of misaligned cloth amount range
To minimize the effect of vibration resonance.
It is possible to change the
The optimum decoupling in any case for the resonance speed.
A water process can be realized.

[0011]

FIG. 1 is a block diagram of an embodiment relating to the first and second means of the drum type washing machine of the present invention. Reference numeral 1 is a displacement amount detection unit that detects the expansion and contraction amount of the damper, 2 is an average value processing unit that averages the outputs of the displacement amount detection unit 1, and 3 is the cloth amount inside the drum based on the output of the average value processing unit 2. A cloth amount detecting unit 4 for detecting detects a resonance rotational speed of the drum based on the output of the cloth amount detecting unit 3, and a resonance rotational speed estimating unit 5 for detecting the content of the dehydration process according to the output of the resonance rotational speed estimating unit 4. It is a dehydration process control unit that determines. The average value processing unit 2, the cloth amount detection unit 3, the resonance rotation speed estimation unit 4, and the dehydration process control unit 5 are included in the control unit 6 that controls the whole, and specifically, are configured by a program of a microcomputer. And the operation is performed. The displacement amount detector 1, the average value processor 2 and the cloth amount detector 3 included in the controller 6
This means is configured, and the cloth amount detection unit 3, the resonance rotation speed estimation unit 4, and the dehydration process control unit 5 constitute a second unit.

FIG. 2 is an internal block diagram of the drum type washing machine of this embodiment. Reference numeral 7 is a motor, 8 is a receiving cylinder, and 9 is a drum that accommodates and rotates clothes. The drum 9 is housed in the receiving tube 8 so that water does not leak outside. Reference numeral 10 is a pulley directly connected to the drum 9, and 11 is a belt for transmitting the rotation of the motor 7 to the pulley 10, that is, the drum 9. Reference numeral 12 is a water supply valve, 13 is a detergent case for sending the detergent into the drum 9 by the water supplied through the water supply valve 12, and 14 is a drainage pump. Reference numerals 15 and 16 are springs for suspending the receiving cylinder 8 from the housing 17, and 18 and 19 are dampers for suppressing the vibration of the receiving cylinder 8.
6.18.19 form the support means of the receiving cylinder 8.
Reference numeral 20 will be described later, but the damper 18
This is a coil for detecting the amount of expansion and contraction.

Next, the operation of the displacement amount detecting section 1 in the first means will be described with reference to FIG. In FIG. 3, the damper 18
2 shows the internal configuration of the coil 20 and the circuit configuration of the displacement amount detection unit 1. Reference numeral 30 denotes a fixed portion to which the damper 18 is fixed on the housing 17 side, and the coil 20 is fixed to the fixed portion 30 and has a hollow structure. Reference numeral 31 is a movable portion fixed to the receiving cylinder 8 side. Reference numeral 32 is a piston fixed to the movable portion 31, 33 is a sliding resistance element fixed to the piston 32 and sliding against the inner wall of the fixed portion 30 while having an appropriate friction resistance, and 35 is fixed to the movable portion 31. It is a magnetic body composed of a ferrite core that moves in the hollow portion of the coil 20 with the movement of the movable portion 31. Reference numeral 36 is an inverter, 37 is a resistor, and 38 and 39 are capacitors. The inverter 36, the resistor 37, and the capacitors 38 and 39 constitute a Colpitts type oscillation circuit together with the coil 20, and the oscillation frequency is the inductance of the coil 20. And capacitor 38
-Determined by the capacity of 39. Reference numeral 40 denotes an f / V conversion unit that converts the oscillation frequency of the oscillation circuit into a voltage level, and the displacement amount detection unit 1 is composed of an inverter 36, a resistor 37, capacitors 38 and 39, and an f / V conversion unit 40. The expansion and contraction displacement of the damper 18 can be regarded as a change in the position of the magnetic body 35 with respect to the coil 20, which changes the inductance of the coil 20.

On the other hand, as described above, the inductance of the coil 20 is a factor that determines the oscillation frequency of the oscillation circuit, and the oscillation frequency changes according to the expansion and contraction displacement amount of the damper 18. The change in the oscillation frequency is converted to the f / V conversion unit 4
By converting to a voltage level with 0, the expansion / contraction displacement amount of the damper 18 can be detected as the magnitude of the voltage.

The operation of the first means of the present invention having the above configuration will be described. When dehydration is started in the dehydration process, the drum 9 rotates, but the position of the receiving cylinder 8 changes depending on the balance state of the cloth in the drum 9. This location information is
The change in the expansion / contraction displacement amount of the damper 18 is input to the average value processing unit 2 of the control unit 6 every moment. As described above, the damper 18 has a certain sliding resistance, and the amount of expansion and contraction displacement thereof is irregular as a momentary value, but on average, the total weight of the springs 15 and 16 and the receiving cylinder 8 is. Corresponds to position information balanced by. That is, the output of the average value processing unit 2 corresponds to the total weight of the receiving cylinder 8. By subtracting the weight of the mechanical element, which is known in design from the total weight of the receiving cylinder 8, the weight of the clothes existing in the drum 9 containing water can be detected. Drum rotation speed in the initial stage of dehydration 200r / mi
By performing this processing when rotating at a low speed of about n, it is possible to detect this cloth amount in advance before shifting to full-scale dehydration. The above is the operation of the first means.

Regarding the first means, this embodiment only mentions the weight detection of the cloth containing water before dehydration, but the drum 9 is rotated without water before water supply during washing, It is clear that the dry weight of the clothes can be detected in the same manner by using the method described above, and it also has an effect that the process contents such as the washing time can be optimized according to the amount of the clothes.

Next, the operation of the second means in the configuration shown in FIG. 1 will be described. The resonance rotation speed estimation unit 4 estimates the resonance rotation speed of the drum 9 corresponding to the cloth amount information detected by the first means, that is, the output of the cloth amount detection unit 3. FIG. 4 shows the correlation between the amount of cloth and the resonance speed of the drum 9. The amount of cloth referred to here is that when the cloth is dried, and the corresponding resonance rotational speed indicates that when the amount of cloth is dehydrated after the water content is sufficiently absorbed by the predetermined drum rotation.

As shown in the figure, when the amount of cloth is increased, the weight of the receiving cylinder 8 as a whole is increased, so that the resonance rotational speed is decreased. As described above, the amount of cloth shown in FIG. 4 is that when the cloth is dry, and the weight of the cloth detected by the cloth amount detection unit 3 of the embodiment of the first means is 200 r / mi as described above.
Although the weight of the product contains water during low-speed dehydration of about n, the result cannot be used as it is. However, the dehydration rate at that time has a certain correlation, and it can be calculated backward from this to obtain the dry weight. Can be detected. Ie 2
Since the dehydration rate at 00r / min is about 30% regardless of the amount of cloth, for example, when the weight of cloth containing water at this time is detected as 3 kg, the dry cloth amount is 3 × 0. It can be calculated as 0.3 = 0.9 (kg).

Alternatively, as described above, the amount of dry cloth can be detected in advance by rotating the drum 9 without water and performing this detection before supplying water during washing. The resonance rotation speed estimation unit 4 estimates the resonance rotation speed from this result and sends the output to the dehydration process control unit 5. The dehydration process control unit 5 controls the subsequent dehydration process from this result by using the resonance rotational speed detected in this way so that there is no inconvenience in terms of safety.

Next, the third means of the present invention will be described. FIG. 5 shows a block diagram of the embodiment. The mechanical structure is the same as that of FIG. 2 described in the embodiments of the first and second means of the present invention. Reference numeral 50 is a displacement amount detection unit for detecting the expansion and contraction displacement amount of the damper 18 described in the embodiments of the first and second means of the present invention, similarly 51 is an average value processing unit, 52 is a cloth amount detection unit, and 53 is It is a resonance rotation speed estimation unit. Reference numeral 54 denotes a dehydration speed increase rate determining section for determining an increase rate of the rotation speed of the drum 9 during dehydration based on the resonance speed of the drum 9 estimated by the resonance speed estimating section 53.
Reference numeral 55 is a motor control unit that controls the operation of the motor 56 in accordance with the output of the rotation speed increase speed determination unit 54 during dehydration. The average value processing unit 51, the cloth amount detection unit 52, the resonance rotation speed estimation unit 53, the dehydration rotation speed increase speed determination unit 54, and the motor control unit 55 are included in the overall control unit 57, and specifically, a microcomputer. And the operation is performed.

With the above structure, the operation of this embodiment will be described with reference to FIG. 2 from the start in the dehydration process
During the period, low-speed dehydration is performed at a drum rotation speed of 200 r / min, and the resonance rotation speed of the drum 9 is estimated by the resonance rotation speed estimation unit 53 here, as in the second means of the present invention. The relationship between the amount of cloth and the resonance speed in this embodiment is that the amount of cloth is 1 k.
If g or less, the resonance speed is from 330 r / min to 35
0 r / min, similarly 290 for 1 to 3 kg
From r / min to 330 r / min, and from 270 r / min to 290 r / min in the case of 3 kg or more.
In accordance with this result, the dehydration rotation speed increase speed determination unit 54 issues a command to the motor control unit 55 to allow the dehydration rotation speed to pass through the resonance point at a very high speed.

That is, the spin-drying speed is increased at a rate of 10 r / min per second, but when the detected cloth amount is 1 kg or less, the drum speed is increased all at once until reaching 400 r / min (FIG. 6 (a)). Similarly, in the case of 1 kg to 3 kg and 3 kg or more, 350 r / min (see FIG. 6).
(B)), start up to 300 r / min (Fig. 6 (c)). As a result, the resonance point can be passed at a high speed in any cloth amount range, and the influence of vibration resonance can be minimized.

The problem after that is that if the rotation speed is raised too fast, the speed of water squeezed out from the clothes increases, and the drainage capacity of the drainage pump 14 cannot keep up, and the drum 9 directly collects the water. This means that the mechanical resistance becomes excessive due to the generation of bubbles, etc. In order to avoid this, the start-up speed of the dehydration is reduced at the earliest possible time point after passing through the resonance point described above, but in the present invention, the maximum speed is determined by the dehydration speed increase rate determination unit 54. The rotation speed is set so as to be appropriate for each cloth amount, and thereafter, the rotation speed is increased at a corresponding rising speed.

That is, 600 r / mi after passing through the resonance point
Until n is reached, the rotation speed increase speed determination unit 54 during dehydration is performed.
Depending on the amount of cloth to be detected, 1 kg or less, 1 kg to 3 kg,
3r / min and 2.5r / s for 3kg or more
/ Min, the dehydration speed is increased at a speed of 2 r / min per second. This is because the larger the amount of cloth, the larger the amount of water generated per unit time during dehydration.

At a rotation speed of 600 r / min or more, the water generation speed is at a level that does not affect the capacity of the drainage pump 14. Therefore, in any case, the dewatering rotation speed is changed to the final rotation speed. Up to 800r / min. By performing such an operation, an optimum dehydration process can be realized in any case with respect to the resonance rotation speed of the drum 9 which differs depending on the amount of cloth.

Next, the fourth means of the present invention will be described. FIG. 7 shows a block diagram of the embodiment. The mechanical structure is the same as that of FIG. Reference numeral 60 is a weight detection unit that detects the weight of the contents of the drum 9, 61 is a pre-water supply weight storage unit that stores the dry weight of the clothes, which is detected by the weight detection unit 60 and before water is supplied during washing, 6
Similarly, 2 is a weight storage unit for washing, which stores the total weight of clothes and water in a state in which water is sufficiently contained during washing, which is similarly detected by the weight detection unit 60, and 63 is a weight storage unit 6 before water supply.
1 and a cloth quality detection unit that detects the cloth quality of the clothes in the drum 9 based on the information in the laundry weight storage unit 62, 64 is the dry cloth amount stored in the pre-water weight storage unit 61, and the cloth quality detection Part 6
3 is a process control unit that optimizes and executes the subsequent entire washing process based on the cloth quality detected by 3. The pre-water-supply weight storage unit 61, the washing-time weight storage unit 62, the cloth quality detection unit 63, and the process control unit 64 are included in the overall control unit 65, and specifically, are configured by a program of a microcomputer, and their operations are performed. Done.

The weight detection unit 60 is composed of the displacement amount detection unit 1 and the average value processing unit 2 described in the embodiment of the first means of the present invention, and the springs 15 and 16 of the receiving cylinder 8 are provided. It can be detected from the fact that the amount of subsidence with respect to, that is, the amount of expansion and contraction displacement of the damper 18 correlates with the weight of the contents in the drum 9.

Further, since the dampers 18 and 19 have a sliding resistance element, the momentary expansion and contraction displacement amount is irregular and physically meaningless, but the average displacement during rotation is large. The quantity has a perfect correlation with the weight of the contents in the drum 9. That is, the dry weight of the clothes stored in the pre-water weight storage unit 61 can be detected by rotating the drum 9 without water before the water supply, and the clothes and water stored in the washing weight storage unit 62 can be detected. The total weight can be detected from the average amount of expansion and contraction displacement of the damper 18 during rotation of the drum during washing.

The operation of this embodiment having the above configuration will be described. The pre-water-supply weight storage unit 61 and the washing-time weight storage unit 62 respectively store the cloth weight of the clothes when dry and the total weight of the clothes and water when washing, as described above.

In the case of a drum type washing machine, generally, during washing, makeup water is supplied at appropriate timing so that the water level becomes constant even if the clothes absorb water and perform washing. Also in the type and amount of any garment for this, it has a feature that is constant for that level. In the drum type washing machine, the amount of water for washing is small, the set water level is 20 mm to 30 mm above the lower surface of the drum 9, and most of the supplied water is contained in clothes inside the drum 9. Will exist. Therefore, it can be seen that the total water absorption amount at the timing when the internal clothes absorb enough water and the makeup water is not supplied has a correlation with the amount and quality of the clothes. That is, when it comes to the water absorption of clothes, cotton-based clothes have better water absorption than synthetic-fiber-based clothes, and if the amount of cloth is the same, the amount of water at the same water level is greater for cotton-based clothes. Become.

Further, it can be seen that, if the cloth quality is the same, the total water absorption becomes larger when the cloth quantity is large. These relationships are shown in FIG. In the regions (A) to (D), the weight at the time of washing is the total weight of clothes and water, and therefore, this does not fall below the weight before water absorption, that is, the dry weight of clothes.
The area (D) does not actually exist. In the area (A), only cotton is put in the area, in the area (C), only synthetic fiber is put in the area, and in the area (B), they are mixed and put in the middle. Indicates the case. Under these conditions, the water absorbency has the above-mentioned properties, and therefore the properties shown in the figure are obtained. In this way, the cloth quality detection unit 63 detects the cloth quality of the clothes in the drum 9. The process control unit 64, based on the detected cloth quality and the dry weight (cloth amount) of the clothes stored in the pre-water supply weight storage unit 61, determines the entire process, such as the washing time, the drum inversion cycle, and the washing temperature. Etc. are automatically set and executed. This makes it possible to realize optimum washing depending on the quantity and quality of clothes.

Next, the fifth means of the present invention will be described. FIG. 9 shows a block diagram of the embodiment. The mechanical structure is the same as that described in the embodiment of the first and second means of the present invention shown in FIG. 70 is a damper 1
The displacement amount detector for detecting the expansion and contraction displacement amount of 8 is the same as that described in the embodiments of the first and second means of the present invention. Reference numeral 71 is a vibration amount detection unit that takes out a variation of the output of the displacement amount detection unit 70 and detects the vibration level of the receiving cylinder 8. Regarding this, the positional information of the receiving cylinder 8 is detected by the displacement amount detection unit 70, but if this changes due to vibration during dehydration, etc., it is utilized that this vibration amount can be taken out as a variation of the positional information. .

Denoted at 72 is a dewatering speed setting unit for automatically setting the drum speed at the time of dewatering, and denoted at 73 is a dewatering speed setting unit 72.
Is a motor control unit that controls the operation of the motor 74 according to the output of the. When the motor controller 73 is instructed to start the dehydration or to change the drum speed after the dehydration by receiving the output of the dehydration speed setting unit 72, the delay time 75 is a predetermined time from that point. It is a delay time calculation unit that outputs an output after a lapse of time. Reference numeral 76 is a determination unit that determines the magnitude of the vibration level of the receiving cylinder 8 detected by the vibration amount detection unit 71 when the output of the delay time calculation unit 75 is received. Reference numeral 77 is a dehydration process control unit that determines the contents of the subsequent dehydration process in response to the determination result of the determination unit 76, the output of which is connected to the dehydration rotation speed setting unit 72 and defines the subsequent dehydration rotation speed. These dehydration speed setting unit 72 and motor control unit 7
3, the delay time calculation unit 75, the determination unit 76, and the dehydration process control unit 77 are included in the overall control unit 78, and are specifically configured by a program of a microcomputer and operate.

The operation of this embodiment having the above configuration will be described. At the time of dehydration, vibration due to imbalance caused by the strain of clothes may be a problem, but in the present embodiment, the vibration amount detection unit 71 detects the level, and the dehydration process control unit 77 based on this level. The contents of the dehydration process to be executed are to be changed appropriately according to the amount of vibration. At this time, as described above, when the motor control unit 73 is instructed by the dehydration rotation speed setting unit 72 to start dehydration or to change the dehydration rotation speed after the start of dehydration,
The motor control unit 73 controls the operation of the motor 74 so that the rotation speed of the drum 9 becomes the set rotation speed.

At the same time, the delay time calculation unit 75 starts measuring the delay time, and when the delay time reaches a predetermined time, an output is sent to the judgment unit 76. The determination unit 76 receives the output, detects the vibration amount of the receiving cylinder 8 at that time from the output of the vibration amount detection unit 71, and determines the magnitude thereof.

As a result, for example, when the vibration amount is at a predetermined level or more, the instruction content to the dehydration rotation speed setting section 72 is changed so as to end the dehydration process without further increasing the dehydration rotation speed. . The reason why the delay time calculator 75 is provided in this way will be described below.

FIG. 10 shows the actual dehydration time and drum speed. When the set dehydration rotation speed is changed at the time of the dehydration time t1, the actual drum rotation speed moves so as to reach the set target rotation speed. In this case, even if the target rotation speed is reached, there are generally some overshoots and unstable periods due to the performance of the speed control of the motor. During this period, the receiving cylinder 8 receives a transient mechanical force, and an extra shake or vibration is superimposed as a disturbance.

Therefore, this effect can be avoided by providing an appropriate delay time td as shown in the figure and detecting the vibration amount at the time when the transitional movement converges. Regarding the setting of the length of td, it is only necessary to set a sufficiently long time so as not to cause any inconvenience under all the conditions, based on the experimental results for various kinds of clothes and amounts of cloth. As described above, according to the present invention, accurate vibration amount detection with the transient influence removed can be realized by a simple method of simple time processing.

In this embodiment, the vibration amount detecting section 71 is described as a change in the expansion / contraction displacement of the damper 18, but the transient disturbance vibration is detected even when the vibration amount is detected by using the acceleration sensor. The need to remove the influence is similar, and the same effect can be obtained according to the present invention.

Next, the sixth means of the present invention will be described. FIG. 11 shows a block diagram of the embodiment. The mechanical structure is the same as that described in the embodiment of the first and second means of the present invention shown in FIG.

Reference numeral 80 denotes a displacement amount detecting portion for detecting the expansion and contraction displacement amount of the damper 18, which is the same as that described in the embodiments of the first and second means of the present invention. 81 is a displacement amount detection unit 8
This is a vibration amount detection unit that takes out the variation of the output of 0 and detects the vibration level of the receiving cylinder 8. The specific configurations and functions of these are the same as those described in the fifth embodiment of the present invention. Reference numeral 82 is a dehydration rotation speed setting unit that automatically sets the drum rotation speed during dehydration, and 83 is a motor control unit that controls the operation of the motor 84 according to the output of the dehydration rotation speed setting unit 82. Reference numeral 85 detects the actual rotation speed of the motor 84, and when the rotation speed stably reaches the set rotation speed commanded by the dehydration rotation speed setting unit 82 to the motor control unit 83, the output is output. This is the rotation speed detection unit.
Reference numeral 86 denotes a determination unit that determines the magnitude of the vibration level of the receiving cylinder 8 detected by the vibration amount detection unit 81 when the output of the rotation speed detection unit 85 is received. Reference numeral 87 is a dehydration process control unit that determines the contents of the subsequent dehydration process in response to the determination result of the determination unit 86, the output of which is connected to the dehydration rotation speed setting unit 82.
It specifies the number of rotations for dehydration thereafter.

The dehydration rotation speed setting unit 82, the motor control unit 83, the rotation speed detection unit 85, the determination unit 86, and the dehydration process control unit 87 are included in the entire control unit 88, and specifically, by a program of a microcomputer. Configured and the operation is performed.

The operation of this embodiment having the above configuration will be described. The purpose is the same as that described in the embodiment of the fifth means of the present invention, and the vibration amount detection unit 81 detects the level of the casing vibration generated by the imbalance of the clothes at the time of dehydration, and based on this, The contents of the dehydration process executed by the dehydration process control unit 87 are appropriately changed to the contents according to the vibration amount. As the operation, as described above, when the motor control unit 83 is instructed by the dehydration rotation speed setting unit 82 to start the dehydration or change the dehydration rotation speed after the dehydration is started, the motor control unit 83 causes the rotation speed of the drum 9 to be changed. The operation of the motor 84 is controlled so that becomes the set rotation speed. At the same time, the rotation speed detection unit 85 detects the actual rotation speed of the motor 84 and sends an output to the determination unit 86 when it reaches a predetermined value in a stable manner. The determination unit 86 receives the output, detects the vibration amount of the receiving cylinder 8 at that time from the output of the vibration amount detection unit 81, and determines the magnitude thereof. As a result, for example, when the amount of vibration is at a level equal to or higher than a predetermined level, the instruction content to the dehydration rotation speed setting unit 82 is changed so as to end the dehydration process without further increasing the dehydration rotation speed. The reason why the motor rotation speed detection unit 85 is provided in this way will be described below.

FIG. 12 shows the actual dehydration time and drum rotation speed. When the dehydration time is changed to the set dehydration rotation speed at time t1, the actual drum rotation speed moves so as to reach the set target rotation speed. In this case, even if the target rotation speed is reached, there are generally some overshoots and unstable periods due to the performance of the speed control of the motor. During this period, the receiving cylinder 8 receives a transient mechanical force, and an extra shake or vibration is superimposed as a disturbance. Therefore, the rotation speed detection unit 85 detects whether or not the drum rotation speed has stably reached the motor rotation speed corresponding to N1 as shown in the figure. As this method, determination is made based on whether or not the number of rotations of the motor detected at appropriate intervals is continuously within a certain range. When the time determined to be stable is t2 shown in the figure, it outputs to the determination unit 86 to make a determination regarding the subsequent dehydration process based on the output of the vibration amount detection unit 81.

By carrying out such processing, if the amount of vibration is detected at the time when the transient movement converges, the above-mentioned influence can be avoided. As described above, according to the present invention, accurate vibration amount detection with the transient effect removed is
Regardless of the amount of clothing and the degree of imbalance, it will be possible to achieve it in the shortest time with the most timing.

Although the vibration amount detecting section 81 is also detected in this embodiment as a change in the expansion and contraction displacement amount of the damper 18, the transient disturbance vibration is detected even when the vibration amount is detected by using the acceleration sensor. The need to remove the influence is similar, and the same effect can be obtained according to the present invention.

Next, the seventh means of the present invention will be described. FIG. 13 shows an example thereof. The mechanical structure is the same as that described in the embodiments of the first and second means of the present invention. Reference numeral 90 denotes a vibration amount detection unit for detecting the vibration amount of the receiving cylinder 8. The configuration and function of the vibration amount detection unit 90 are a combination of the displacement amount detection unit and the vibration amount detection unit described in the section of the fifth means of the present invention. In the dehydration process, 91 is a low-speed dehydration execution unit that executes an imbalance correction cycle that improves the condition of the clothes before the main dehydration and then performs preliminary dehydration, and 92 is a high-speed dehydration execution unit that performs the main dehydration. Is. Reference numeral 93 is a motor control unit that controls the operation of the motor 94 in order to realize the drum rotation speed at the time of dehydration instructed by the low speed dehydration executing unit 91 and the high speed dehydration executing unit 92. A determination unit 95 determines the vibration level of the receiving cylinder 9 by the output of the vibration amount detection unit 90 immediately before the low-speed dehydration execution unit 91 finishes the preliminary dehydration process. The low-speed dehydration executing unit 91 outputs an output to the dehydration executing unit 92 to execute the main dehydration, and once it is larger than a predetermined value, the motor 94 is temporarily stopped, and the imbalance correction cycle of the clothes is executed, and then the judgment is performed again. This is a judgment unit that issues a command to redo. These low speed dewatering execution unit 91 and high speed dewatering execution unit 9
2. The motor control unit 93 and the determination unit 95 are the overall control unit 96.
And is specifically configured by a program of a microcomputer to perform its operation.

The above-mentioned imbalance correction cycle means that the drum is accelerated very slowly from the stopped state, and clothes are unraveled to be fixed to the wall surface of the drum by the centrifugal force thereof to balance the clothes. The condition is improved and the preliminary dehydration step is performed.

Further, the reason why the preliminary dehydration step is necessary is that even if the above-mentioned imbalance correction cycle is carried out, an imbalance of the clothes which cannot withstand the high speed dehydration may occur. This is because the imbalance-correcting cycle is performed again after the removal from the water, so that the balance state is further improved and the main dehydration is executed. This is because even if the same imbalance correction cycle is performed, the effect is greater for clothes with some water removed than for clothes with sufficient water.

The operation of this embodiment having the above configuration will be described. FIG. 14 shows the movement of the rotation speed of the drum during the dehydration. Conventionally, at the time when the preliminary dehydration process including the imbalance correction cycle is completed (point A in the figure), the rotation is temporarily stopped as shown by the broken line for the reason described above, and the imbalance correction cycle is executed again before the main dehydration. It was transitioning. In this embodiment, the judgment unit 95 judges the level of the receiving cylinder vibration at the point A in the figure, and if it is below a predetermined value, the high-speed dehydration which is the main dehydration is executed as it is. Even if the clothes contain a lot of water, there is a certain probability that the vibration can be transferred to the main dehydration after the imbalance correction cycle and the vibration is at a certain level. In that case, the process time can be shortened.

In the present embodiment, as shown in the figure, it can be seen that the time required for the dehydration process, which was conventionally required up to t4, can be reduced to t3 if the conditions are good. As described above, according to the present invention, the process time can be optimized and shortened according to the state at that time.

In the present embodiment, the vibration amount detecting section 90 has been described as detecting the change in the expansion and contraction displacement amount of the damper 18, but the function is the same when the vibration amount is detected by using the acceleration sensor. According to the present invention, the same effect can be obtained.

[0053]

As described above, the drum type washing machine of the present invention
Stores the clothes in a rotating drum and the drum
And a control unit, wherein the control unit is the
A cloth amount detector that detects the amount of cloth in the drum
Resonance circuit for estimating the vibration resonance rotation speed during dehydration from the output of the unit
Depending on the output of the rotation speed estimation unit and the resonance rotation speed estimation unit,
It has a dehydration process control unit for controlling the rotation of the drum,
The dehydration process control unit responds to the output of the resonance speed estimation unit.
To increase the drum rotation speed during dehydration
Therefore, the resonance speed of the drum according to the amount of cloth is determined in advance.
It is possible to avoid abnormal vibration
Mostly, the optimum dehydration startup sequence according to the condition of clothes
Can be realized.

[Brief description of drawings]

FIG. 1 is a block diagram of a drum type washing machine showing an embodiment of first and second means of the present invention .

FIG. 2 is a schematic cross-sectional configuration diagram of a drum type washing machine showing a mechanical configuration of an embodiment of first and second means of the present invention .

FIG. 3 is a block diagram of a displacement amount detector in the embodiment of the first means of the present invention .

FIG. 4 is a characteristic diagram showing the relationship between the amount of cloth and the number of resonance revolutions in the embodiment of the second means of the present invention .

FIG. 5 is a block diagram of a drum type washing machine showing an embodiment of the third means of the present invention .

[6] third means timing chart showing the movement of the dewatering rotation number with respect to dewatering time of each sensing the laundry amount in the embodiment of the present invention

FIG. 7 is a block diagram of a drum type washing machine showing an embodiment of the fourth means of the present invention .

FIG. 8 is a characteristic diagram showing divisions of a detection cloth quality region in the embodiment of the fourth means of the present invention .

FIG. 9 is a block diagram of a drum type washing machine showing an embodiment of the fifth means of the present invention .

[10] Timing <br/> chart showing the drum rotation speed relationship of the vibration amount detection timing in the embodiment of the fifth aspect of the present invention

FIG. 11 is a block diagram of a drum type washing machine showing an embodiment of the sixth means of the present invention .

[12] Sixth timing <br/> chart showing the relationship between the drum rotational speed and the vibration amount detection timing in the embodiment of means of the present invention

FIG. 13 is a block diagram of a drum type washing machine showing an embodiment of the seventh means of the present invention .

[14] Seventh timing chart showing the movement of the dewatering rotation number with respect to dewatering time in the embodiment of invention of the present application

[Explanation of symbols]

1 Displacement detector 2 Average value processing unit 3 Cloth amount detector 4 Resonance speed estimation unit 5 Dehydration process control unit 6 control unit 54 Dehydration speed increase rate setting section 60 Weight detector 61 Weight storage unit before water supply 62 Washing Weight Storage 63 Cloth quality detector 64 Process control unit 65 Control unit 71 Vibration amount detector 72 Dehydration speed setting unit 75 Delay time calculator 76 Judgment section 77 Dehydration process control unit 78 Control unit 85 Rotation speed detector 91 Low-speed dehydration execution unit 92 High-speed dehydration execution unit 95 Judgment Department

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuhiko Sumiya 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Hayashi Lighting 7-6, Tonoshimacho, Kadoma City, Osaka Excel Techno Co., Ltd. (56) References Japanese Unexamined Patent Publication No. 5-154275 (JP, A) Japanese Unexamined Patent Publication No. 50-61876 (JP, A) Japanese Unexamined Patent Publication No. 5-146582 (JP, A) Actual Development No. 4-60185 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) D06F 1/00-51/02

Claims (2)

(57) [Claims] 1. A control system comprising: a drum that accommodates and rotates clothing; a receiving cylinder that accommodates the drum; and a controller.
The part is a cloth amount detecting part for detecting the amount of cloth in the drum, and
Estimate the vibration resonance rotation speed during dehydration from the output of the cloth amount detection unit
Resonance rotation speed estimating section, and output of the resonance rotation speed estimating section
A dehydration process control unit that controls the rotation of the drum according to
Having, the dehydration process control unit, of the resonance rotation speed estimation unit
Increase the drum rotation speed during dehydration at an ascending speed according to the output.
Drum type washing machine that is designed to be made . 2. The dehydration process control unit includes a resonance rotation speed estimation unit.
Estimate the resonance speed of the drum from
Pass the resonance point at high speed at a rising speed according to the output of the part
At the same time, after passing through the resonance point,
Set it lower than when passing through the resonance point and stand up to the specified final speed.
The drum type washing machine according to claim 1, wherein the drum type washing machine is lifted.