KR100358311B1 - Washing machine - Google Patents

Abstract

The pressure sensor 1 is attached to the suspension rod support anvil 24 which fixes the suspension rod 12 which hangs and supports the outer tank 11. The pressure sensor 1 has a structure in which a coil is wound around a magnetostrictive element whose magnetic characteristics change greatly when it is stretched or twisted by an external load, and the pressure is generated by generating a signal having an oscillation frequency according to the inductance of the coil. The load received by the sensor 1 is detected. In this washing machine, before supplying water, first, the amount of laundry contained in the laundry dehydration tank 13 is detected based on the output of the pressure sensor 1, and the washing water level is determined accordingly. Thereafter, the water supply valve is opened to start water supply in the outer tank 11, and the weight of the water supplied is detected on the basis of the output of the pressure sensor 1, and the water supply is stopped when the water level is reached and converted to the water level. . The pressure sensor performs both the load detection function and the water level sensor.

Description

Washing machine {WASHING MACHINE}

The present invention relates to a washing machine.

In the washing machine, a load detection means for detecting the weight of the laundry contained in the laundry dehydration tank, a water level sensor for measuring the water level in the laundry dehydration tank, and a vibration detection for detecting abnormal vibration when the laundry dehydration tank is dehydrated and rotated with the laundry in one side. Various sensors, such as a sensor, and a detection means are used.

For example, as a conventional load detection method, what is described in Unexamined-Japanese-Patent No. 63-206283 is known. That is, the motor for rotating the stirrer provided at the bottom of the washing dehydration tank is turned on after a predetermined time is turned off, the pulse signal synchronized with the rotation of the motor is counted immediately after the turning off, and the motor stops rotating due to inertia. The load amount is determined based on the count value of the pulse signal. The higher the load, the faster the stirrer stops. Therefore, the smaller the count value, the larger the load. However, in the load detection method using the rotation of the stirrer in this way, the detection value fluctuates depending on the cloth material and the cloth state of the laundry, so it is difficult to improve the accuracy. Moreover, since agitator and laundry rub strongly, there also exists a problem which is easy to cause cloth damage.

On the other hand, a method of using a weight sensor that directly measures the weight of the laundry accommodated in the washing tub instead of indirectly estimating the load amount has been proposed. For example, in the washing machine disclosed in Japanese Patent Laid-Open No. Hei 5-84382, the weight sensor constituted by a spring, a coil, a core, and the like is provided on a suspension rod that supports a washing tank. In this configuration, when the load applied to the suspension rod changes and the suspension rod moves up and down, the length of the core inserted into the fixed coil is changed, so that the inductance of the coil is changed accordingly.

However, in the washing machine equipped with such a weight sensor, the weight sensor spring is installed separately from the vibration absorbing coil spring disposed between the outer tank and the suspension rod to absorb the vibration of the laundry dehydration tank, so that only two types of the suspension rod can be used. Coil springs are placed, which complicates vibration damping design. Moreover, since the spring used for a weight sensor has a natural frequency, there exists a possibility that the weight sensor itself may amplify vibration, such as an outer tank, in some cases. In addition, since such a weight sensor has a large shape, it occupies a large space in the gas frame of the washing machine, which hinders the downsizing and large capacity of the washing machine. In addition, the detection accuracy decreases with the change over time such as deterioration of the spring.

In addition, there are the following problems. The weight sensor not only can detect the weight of the laundry contained in the laundry dehydration tank, but can also structurally measure the weight of the water supplied and stored in the outer tank. However, while the load is only a few kilograms, the weight of the stored water is more than ten times that of the remarkably large. Therefore, if the weight sensor is configured to secure a wide detection range so that the weight of water can be measured, the detection accuracy of the load amount is considerably low. On the contrary, if the said weight sensor is comprised so that the precision sufficient for detection of a load may be secured, it will become impossible to cover the detection range of the weight of water. From this point of view, it is difficult to measure both the load due to laundry and the weight of water even if the weight sensor is used.

This invention is made | formed in order to solve such a subject, The main objective is to provide the washing machine provided with the compact and highly accurate load sensor, without affecting the damping design or the rotation of a washing dehydration tank. Another object of the present invention is to use the load sensor not only for detecting the load amount but also for detecting the weight of water so that the load sensor can also function as a water level sensor. Another object of the present invention is to provide a washing machine having a sensor capable of accurately detecting the washing dehydration tank and the vibration of the outer tank at the time of dehydration with high accuracy.

1 is a longitudinal sectional view showing an example of a pressure sensor used in a washing machine according to the present invention.

2 is a graph showing the relationship between the magnitude of an external load and an inductance applied to a pressure sensor.

3 is a side sectional view showing the configuration of a washing machine according to the first embodiment;

4 is an electric system configuration diagram of main parts of the washing machine according to the first embodiment;

Fig. 5 is a flowchart showing the operation from the washing start to the washing stroke start in the washing machine of the first embodiment.

6 is an electric system configuration diagram of the main portion of the washing machine according to the third embodiment.

Fig. 7 is a side sectional view showing the construction of a washing machine according to the second embodiment.

8 is an enlarged view of a portion A of FIG. 7;

Fig. 9 is a flowchart showing the operation from the washing start to the washing stroke start in the washing machine of the third embodiment;

Fig. 10 is a flowchart showing the operation during the dewatering stroke in the washing machine of the third embodiment;

11 is an electric system configuration diagram of main parts of the washing machine according to the fourth embodiment.

12 is an electric system configuration diagram of the main portion of the washing machine according to the fifth embodiment.

Fig. 13 is a side sectional view showing the construction of a washing machine according to the sixth embodiment;

Fig. 14 is a graph showing changes in measured voltage values when a dehydration operation is performed with an eccentric load placed in a laundry dehydration tank in a washing machine having a suspension rod with protrusions formed thereon.

Fig. 15 is a graph showing a change in measured voltage value when a dehydration operation is performed with an eccentric load placed in a laundry dehydration tank in a washing machine having a suspension rod without protrusions.

16 is a side sectional view showing a configuration of a washing machine according to the seventh embodiment;

17 is an enlarged view of a portion B of FIG. 16;

18 is a flowchart showing an operation during washing operation in the washing machine of Example 7. FIG.

19 is a flowchart showing the operation during the dehydration stroke in the washing machine of the seventh embodiment;

<Explanation of symbols for the main parts of the drawings>

1: pressure sensor

5: water pressure part

10: airframe

11: outer bird

12: suspension rod

13: washing dehydration tank

14: Stirrer

16: motor

24: Hyunsubong Stand Anvil

30: control unit

31: LC oscillator

32: frequency detector

33: control panel

34: water supply valve

35: drain valve

40, 50: microcomputer

41, 51: DC power

42, 52: aftershock circuit

43: constant current circuit

45, 53: current detection circuit

47: amplitude detection circuit

In order to solve the said subject, the washing machine which concerns on this invention uses the pressure sensor using the magnetization distortion element whose magnetic characteristic changes with the speed or magnitude | size of the external force, when an external force is received. About this kind of pressure sensor, it is disclosed by the microfilm of Unexamined-Japanese-Patent No. 1-105834, for example.

That is, the washing machine which concerns on this invention is a washing | cleaning dehydration tank in the washing machine provided with the gas frame which forms an external appearance, the outer tank suspended and supported in the inside of a gas frame, and the laundry dehydration tank rotatably provided in the inside of the said outer tank. It is provided in a site that receives an external force due to the load of laundry contained within and the weight of the water supplied and is close to the magnetostriction element so as to detect a change in the magnetic properties of the magnetostriction element and the magnetostriction element generated by the external force. A pressure sensor including a coil disposed in the above state, a measuring means for measuring the load amount and the weight of the water based on an output of the coil of the pressure sensor, and the load amount being acquired by the measuring means before supplying water. Determine the quantity of water to be watered according to, and in the case of water supply by detecting the weight of water by the measuring means And it is characterized in that it includes the operation control means for the water supply in accordance with the amount.

The pressure sensor has a feature of being compact and lightweight and having a wide detection range. Therefore, since it does not occupy a large space even if it attaches to any part in a washing machine, it does not prevent the washing machine from becoming small and large in capacity. Moreover, since a movable member such as a spring is not used, it does not cause vibration itself, and there is no deterioration in detection accuracy due to deterioration of the movable member over time.

In addition, the pressure sensor can detect an external force (external load) over a wide range, and furthermore, the smaller the external force, the higher the detection sensitivity. Therefore, it is especially suitable for detecting a load amount and the weight of water as the same pressure sensor. That is, in the above configuration, before the water supply, the load can be detected by the measuring means with high sensitivity, and when the weight of water much larger than the load is added, the large weight can also be detected accurately. Since the weight of water can be converted into the water level in the outer tank, the pressure sensor and the measuring means perform not only the load detection function but also the water level detection function, and the water level sensor, which has been conventionally configured such as a pressure hose, becomes unnecessary.

In addition, the pressure sensor is installed at a position that receives an external force due to a load amount or a weight of water and at the same time receives an eccentric load due to the eccentric load caused by the eccentric load of the laundry contained in the laundry dehydration tank and the vibration caused by the eccentric load. The means can measure not only the load amount and the weight of water, but also the vibration caused by the eccentric load or the eccentric load based on the output of the coil of the pressure sensor.

The measuring means may be configured to measure only the eccentric load and / or the vibration based on the output of the coil of the pressure sensor.

As one embodiment of the measuring means in the washing machine of the present invention, a change in the magnetic characteristics of the magnetization distortion element can be configured as a change in the inductance of the coil, and specifically, an LC oscillator including a coil, for example. It can be detected as a change in the oscillation frequency in. In the case of detecting a change in inductance in this manner, the inductance depends on the number of turns of the coil. When the number of turns is changed, the amount of change in inductance changes. Therefore, if it is set as the structure provided so that a plurality of other coils can be switched, the suitable detection sensitivity according to a detection object can be obtained. Specifically, as described above, when the load amount and the weight of water are detected by the same pressure sensor, the load amount can be detected with high sensitivity, and the weight of water can be configured to decrease the sensitivity.

In the washing machine according to the present invention, the pressure sensor can be installed in various parts of the washing machine, but, for example, a suspension rod pivot portion that supports a suspension rod for hanging and supporting an outer tank incorporating a laundry dehydration tank, or the washing machine with respect to the floor surface. It can be installed on the leg supporting the bridge. Since each of these parts is a part directly receiving an external force by the load amount or the weight of water, it is particularly suitable for detecting the load amount or the weight of water.

Moreover, generally, since the suspension rod pivot part is formed in multiple numbers, a pressure sensor can be provided in the whole of the suspension rod pivot part, respectively. Since the plurality of suspension rod pivot portions distribute and support the loads respectively, high detection accuracy can be achieved by providing a pressure sensor in its entirety and obtaining a load based on the detected value.

In addition, the pressure sensor is not provided in the entire suspension rod pivot portion, but the pressure sensor is provided in at least one portion, and the load, water weight, eccentric load, or vibration are estimated based on the detection value obtained by the pressure sensor. You may also According to this structure, since the number of pressure sensors becomes small, cost can be reduced. In such a structure, it is preferable to set it as the structure which performs a several time detection by a pressure sensor, rotating a laundry dehydration tank at low speed, and estimates a load amount, the weight of water, an eccentric load, or a vibration based on the detection value. According to this structure, even if the pressure sensor is not provided in each suspension rod pivot part, the influence of the bias of loads, such as laundry distribution, is eliminated and high detection precision can be achieved.

Moreover, in the washing machine which concerns on this invention, when making only eccentric load and a vibration target, it is preferable to provide the said pressure sensor in the site | part where the vibration which generate | occur | produces at the time of washing | cleaning, rinsing, or dehydration operation | movement is large. Specifically, for example, the pressure sensor may be attached to the gas frame so that the vibration of the gas frame is converted into an external force and detected by the pressure sensor.

In addition, a washing machine according to the present invention is a washing machine having a base frame, an outer tub suspended and supported in the interior of the base frame, and a laundry dehydration tank rotatably provided in the interior of the tub. It is provided in a site that receives an external force due to a load and vibration generated in the outer tank, and is disposed in close proximity to the magnetostrictive element so as to detect a change in the magnetic properties of the magnetostrictive element and the magnetostrictive element generated by the external force. And a pressure sensor including a coil and measuring means for measuring the load and vibration based on the output of the coil of the pressure sensor.

This measuring means can be set as the structure provided so that switching to the weight measurement mode which measures the said load, and the vibration measurement mode which calculate | requires the said vibration is possible. In this configuration, for example, switching may be performed such that the measuring means is set to the vibration measuring mode when the washing dehydration tank is rotating, and the measuring means is set to the weighing mode when the washing dehydrating tank is stopped. With such a configuration, the rotation of the laundry dehydration tank is set to the vibration measurement mode to detect abnormal rotation, and during the stop of the washing dehydration tank, the load measurement is performed to the weight measurement mode, especially at the start of washing.

The washing machine may be configured to determine that the rotation is abnormal when the magnitude of the vibration obtained by the measuring means is larger than a predetermined threshold. That is, when the laundry dehydration tank is eccentrically rotated by the ubiquitous of the laundry or the like, the greater the eccentricity, the greater the vibration obtained by the measuring means. Thereby, rotation abnormality is detected.

And in this structure, it is preferable to set it as the structure which sets the said predetermined threshold value based on the magnitude | size of the load obtained by the said measuring means. That is, since the magnitude of the vibration obtained by the measuring means varies according to the load amount even if the degree of eccentricity is the same, the deviation of the degree of eccentricity which should be judged to be abnormal rotation by setting the threshold value according to the load acting on the washing dehydration tank is reduced.

Moreover, the said measuring means may be set as the structure provided with the weight vibration measuring mode which simultaneously measures the load and vibration which act on the said outer tank. In this configuration, first, a predetermined threshold is set based on the magnitude of the load obtained by the measuring means, and when the magnitude of the vibration obtained by the measuring means is larger than the predetermined threshold, it can be determined that the rotation is abnormal. With such a configuration, the magnitude of the load determining the threshold and the magnitude of the vibration to be detected as the rotation abnormality can be acquired at the same time. Thus, the threshold value of the rotation abnormality detection is set without being affected by the variation in the time series load.

Specifically, the outer tub is suspended and supported by a plurality of suspension rods, and the pressure sensor is supported by one end of the suspension rod side support portion formed at the end of the suspension rod, and the other end is supported by the gas frame side support portion disposed on the gas frame. can do. And the suspension rod in which the pressure sensor is arrange | positioned among the several suspension rods can be set as the structure provided with the protrusion which protrudes toward the outer tank side. With such a configuration, when the laundry dehydration tank is eccentrically rotated by the uneven distribution of the laundry, the outer tank is inclined to collide with the projection of the suspension rod. The impact caused by this collision is transmitted to the pressure sensor via the suspension rod, and rotational abnormality is detected. If the thickness of the portion where the projections on the peripheral surface of the outer shell collide with each other is formed thicker than the other peripheral surfaces of the outer shell, deformation and deterioration of the outer shell due to the collision of the projection between the outer tank and the suspension rod are reduced.

Moreover, in the washing machine which concerns on this invention, when the vibration sensor detects a predetermined | prescribed or more vibration during a washing operation or a rinsing operation, it can be set as the structure which reduces the rotation speed of a stirrer so that water flow may weaken. According to this configuration, it is also possible to avoid vibration and reduce water splashing around the washing machine. When the vibration sensor detects a predetermined vibration or more during the dehydration operation, the imbalance correction operation for rearranging the laundry in the laundry dewatering tank can be performed. According to this configuration, it is possible to reliably avoid occurrence of abnormal vibration and abnormal noise during dehydration.

In addition, the present invention can be widely applied to a washing machine. That is, in a device having a container rotatable about a vertical axis or a horizontal axis, similar to a washing machine, and containing an object in the container to rotate the container, the device may be caused by vibration generated during a load or rotational motion applied to the container. What is necessary is just to set it as the structure which provides the pressure sensor using a magnetization distortion element in the part which receives an external force. Specifically, by applying the present invention to a dryer equipped with a rotating drum, the weight of the laundry contained in the drum can be detected and vibration during operation can be detected.

EMBODIMENT OF THE INVENTION Hereinafter, the several Example of the washing machine which concerns on this invention is described with reference to drawings.

First, the pressure sensor used for the washing machine according to the present invention will be described with reference to Figs.

1 is a longitudinal sectional view showing an example of this pressure sensor. The pressure sensor 1 includes a core 2 composed of a cylindrical supermagnetizing distortion element, a bobbin 6 disposed on the circumferential surface of the core 2, a coil 3 wound along the bobbin 6, And rubber elastic rings 7 and 8 disposed on the upper and lower surfaces of the bobbin 6, a cylindrical case 4 having a bottom surrounding the coil 3, and one end face of the core 2. And the hydraulic part 5 which protrudes from the opening end surface of the case 4 is comprised. The hydraulic part 5 is formed in a spherical shape of the surface facing outward, that is, the external load, thereby allowing the load to be uniformly applied to the entire end surface of the core 2 by receiving the external load at one point. have.

The supermagnetizing distortion element constituting the core 2 is an element whose magnetic properties change depending on the speed or magnitude of the force when it is deformed by an external load such as mechanical compression, stretching or torsion. That is, in the pressure sensor 1, for example, as shown in FIG. 1, when the external load is applied to the pressure receiving portion 5, and pressure is applied to the upper end surface of the core 2 via the pressure receiving portion 5, the deformation thereof is performed. The magnetic inductance of the coil 3 changes accordingly. 2 is a graph showing an example of the relationship between the magnitude of the external load and the inductance in the pressure sensor 1. As is clear from Fig. 2, the pressure sensor 1 has a characteristic in which the change amount of inductance with respect to the same external load change amount is larger, that is, the detection sensitivity is higher as the external load is smaller. In the same supermagnetizing distortion element, as the number of coils is increased, the inductance increases, so that the slope of the curve showing the characteristic increases.

<Example 1>

Next, the washing machine according to the first embodiment (hereinafter referred to as "Example 1") using the pressure sensor 1 is described in detail. 3 is a side sectional view showing the configuration of the washing machine of the first embodiment. Inside the gas frame 10 of the washing machine, an outer tub 11 is suspended and supported by four suspension rods 12 (only two are shown in FIG. 3), and a peripheral wall is disposed inside the outer tub 11. The laundry dehydration tank 13 having a plurality of dewatering holes in the center is pivotally rotatable about the main shaft 15. At the bottom of the laundry dehydration tank 13, a stirrer 14 for stirring laundry is arranged. The rotational power of the motor 16 attached to the lower surface of the outer tub 11 is provided by the motor pulley 17 and the V belt ( 18), it is transmitted to the laundry dehydration tank 13 and the stirrer 14 via the main pulley 19 and the power switching mechanism 20.

The attachment structure of the suspension rod 12 will be described in more detail. The lower end portion of the suspension rod 12 penetrates the attachment piece 21 protruding outward from the bottom wall of the outer tub 11, and a compression coil is provided at the front end thereof. The dustproof member 22 with a spring is provided. The upper end of the coil spring is fixed to the attachment piece 21. When the load of the outer tub 11 is applied to the dustproof member 22 via the attachment piece 21, the coil spring is stretched to vibrate the outer tub 11. Absorb it. On the other hand, the upper end part of the suspension rod 12 is hold | maintained so that it can move to an up-down direction by the suspension rod support anvil 24 fixed to the attachment piece 23 which protruded inwardly from the base frame 10, The suspension The rod support anvil 24 is provided with a pressure sensor 1 so as to receive a load applied to the suspension rod 12. One pressure sensor 1 is provided in each suspension rod support anvil 24 which supports four suspension rods 12, respectively. Since the loads of the outer tub 11 are distributed and applied to the four suspension rod receiving anvils 24, respectively, the four pressure sensors 1 each receive this distributed load as an external load.

4 is an electric system configuration diagram of the main part of the washing machine. The control part 30 is comprised including a CPU etc., and receives the operation signal from the operation part 33, and controls the operation | movement of the motor 16, the opening-closing operation | movement of the water supply valve 34, the drain valve 35, etc. The coils 3 of the four pressure sensors 1 installed on each suspension rod support anvil 24 are connected to separate LC oscillators 31 (only one system is shown in FIG. 4), and the LC oscillators 31 ) Generates an oscillation having a frequency corresponding to the inductance L1 due to the inductance L1 of the coil 3 and resonance by a capacitor (not shown). The frequency detector 32 detects the frequency of the oscillation waveform and inputs the detection result to the controller 30. Accordingly, the control unit 30 receives four detection signals corresponding to the inductance of the coil 3 of each pressure sensor 1. The control part 30 adds the detection signals obtained from the four frequency detection parts 32, or performs another arithmetic process, and calculates load amount, water weight, eccentric load, etc. as mentioned later. Specifically, when detecting the load amount or the weight of water, each detected value is added. Therefore, in order to detect only the load amount or the weight of water, the inductance of the four coils 3 is added by connecting the coils 3 of the four pressure sensors 1 in series, and adding them as the only LC oscillator. It is good also as a structure which generate | occur | produces oscillation of the frequency according to the inductance which was made.

Fig. 5 is a flowchart showing the control operation of this washing machine. 5, the operation from the start of washing to the start of washing operation in the washing machine of the present embodiment will be described.

When the user injects laundry into the laundry dehydration tank 13 and instructs the operation unit 33 to start washing, the control unit 30 first executes a load detection detection process (step S1). That is, when the laundry is put into the laundry dehydration tank 13, the weight applied to the suspension rod 12 by the weight of the laundry increases, so that the external load received by the water pressure unit 5 of the pressure sensor 1 increases. do. Then, the inductance L1 changes, and the oscillation frequency in the LC oscillator 31 changes. The control part 30 reads the oscillation frequency from the frequency detection part 32, and calculates load amount with reference to the table which showed the relationship of a frequency and load amount, for example. Such a table can be experimentally examined in advance and stored in memory.

The control unit 30 determines the washing water level or the intensity of the water flow in accordance with the detected load amount (step S2), opens the water supply valve 34 and starts water supply into the outer tub 11 (step S3). When water accumulates in the outer tub 11, the external load applied to the hydraulic pressure section 5 of the pressure sensor 1 is further increased by the weight of the water. The controller 30 determines whether or not the oscillation frequency read from the frequency detector 32 has become a frequency corresponding to the weight of water corresponding to the washing water level (step S4). To stop the water supply (step S5). Then, the motor 16 is rotationally driven so as to have a rotation speed corresponding to the water flow determined as described above, and the stirrer 14 is rotated to start washing (step S6).

As described above, in this washing machine, the pressure sensor 1 detects the load and converts the water into weight to detect the water level. Therefore, the water level sensor mounted in the conventional general washing machine is unnecessary.

By the way, the load by laundry is usually about 7 to 8 kg even at maximum, but when the washing level is high, the quantity of water may be several tens of liters, so the weight of water is up to several tens of kg, much larger than the load, and the required detection range It is also wide. On the other hand, while the detection accuracy of the weight of water may be low, the detection accuracy of the load amount is required to be as high as about 0.5 to 1.0 kg. As shown in FIG. 2, this pressure sensor 1 has the characteristic that a detection sensitivity becomes high, so that an external load is small. That is, since high sensitivity can be obtained at the time of load detection and detection sensitivity becomes low at the time of level detection, it meets the above-mentioned requirements, and it turns out that this pressure sensor 1 is suitable for detection of load amount and water level. have.

Moreover, in order to detect the load amount and the weight of water as said structure, there exists a possibility that the circuit for frequency detection may become complicated because the range of the frequency change in the LC oscillator 31 becomes wider. On the contrary, in order to narrow the change range of the frequency, the detection sensitivity is lowered, and there is a possibility that sufficient sensitivity cannot be secured especially in detecting the load. Therefore, if the following is performed, the frequency change range can be narrowed while ensuring sufficient detection sensitivity. In other words, as shown in Fig. 2, the inductance depends on the number of turns of the coil. Thus, two kinds (or another kind) of coils each having a different winding number are wound around the supermagnetizing distortion element 2 of the pressure sensor 1, and the oscillation can be performed by the LC oscillator 31 as necessary. Change the number of turns of the coil when As described above, the required detection range for the weight of the water is significantly wider than the required detection range for the load. In the external load region for detecting the water weight, the inductance for the same external load change amount is reduced by reducing the number of turns of the coil. The change amount is made small and the change range of the inductance becomes relatively narrow also with respect to the wide external load range. In this case, although the detection sensitivity becomes low, since the sensitivity of water weight detection may be low, there is no problem at all. On the other hand, in the external load region for detecting the load amount, a high detection sensitivity is ensured by increasing the number of turns of the coil. In addition, the specific example of the switching control method of a coil is demonstrated in Example 3 mentioned later.

In the washing machine according to the first embodiment, the eccentric load and the vibration during dehydration operation can be detected using the pressure sensor 1. If the laundry contained in the laundry dehydration tank 13 before the dewatering surge is not evenly distributed around the rotational axis, the external load is unevenly applied to the four pressure sensors 1. So, for example, the difference between the maximum weight and the minimum weight in the weight of the wet laundry detected by the four pressure sensors 1 is calculated, and it is determined that the eccentric load is large when the difference is more than a predetermined value. In this case, in order to perform an imbalance correction, an appropriate amount of water is first supplied into the outer tub 11 and the stirrer 14 is rotated. In this way, the laundry is released and the distribution state changes, so the eccentric load may be determined again.

In addition, even before the start of the dehydration operation, even if the eccentric load is small, the washing dehydration tank is rotated at a high speed, and as the dehydration proceeds, the eccentric load increases, and vibration may occur. If the vibration is too great, the outer tub 11 may collide with the inner wall of the base frame 10 to cause abnormal noise, or abnormal load may be applied to the main shaft 15 to cause failure. Therefore, even after the dehydration operation is rapidly increased, the difference in the detected values by the four pressure sensors 1 may be determined, and when the difference is equal to or more than the predetermined value, it may be determined that abnormal vibration has occurred.

<Example 2>

Next, a washing machine according to a second embodiment of the present invention (hereinafter referred to as "Example 2") will be described. FIG. 7 is a side sectional view showing the structure of a washing machine of the second embodiment, and FIG. 8 is an enlarged view of a portion A in FIG. The washing machine of the first embodiment has a pressure sensor on the four suspension rod support anvil, but in the washing machine of the second embodiment, the pressure sensor (1) is provided on the legs 25 provided at four corners of the bottom surface of the gas frame 10. ). The leg portion 25 is made of an elastic body such as rubber to prevent the vibration of the gas frame 10 from being transmitted to the bottom surface, and the pressure sensor 1 has the hemispherical hydraulic pressure portion 5 downward (bottom surface side). Is embedded in the leg portion 25 so as to face. Since the four leg parts 25 distribute and support the load of the whole washing machine, the four pressure sensors 1 receive the external load accordingly. Therefore, the only difference from the washing machine of Example 1 is whether or not the load includes a load other than the portion supported by the suspension rod 12, and in the same manner as described above, load detection, water level detection, and eccentricity at the time of dehydration are performed. Load detection, vibration detection, etc. can be performed.

<Example 3>

Next, a washing machine according to a third embodiment of the present invention (hereinafter referred to as "Example 3") will be described. In the washing machine of Example 1, since each pressure rod support anvil 24 is equipped with the pressure sensor 1, four sensors are needed. In the washing machine of the third embodiment, the pressure sensor 1 is provided only in one of the suspension rod support anvils 24, and the load amount and the water level are detected using the detection value of the pressure sensor 1.

6 is an electric system configuration diagram of the main part of the washing machine of the third embodiment. As described above, the pressure sensor 1 of the washing machine is divided into two coils 300 each so as to change the detection sensitivity, and when the switching switch 36 is dropped to a side, two coils are connected in series. It turns out to be 600 turns of coils, and when it is knocked down toward b, only one coil is used to make a coil of 300 turns. As shown in Fig. 2, when the number of turns of the coil is small, the amount of change in inductance becomes small as a whole, so that the detection sensitivity is suppressed.

9 is a control flowchart of operations from the start of washing to the start of a rinse stroke in the washing machine of the third embodiment. When the start of the washing operation is instructed, the control unit 30 causes the switching switch 36 to fall to a side so that the number of turns of the coil 3 of the pressure sensor 1 becomes 600 revolutions (step S11). Then, the motor 16 is driven to rotate to rotate the washing dehydration tank 13 at 30 rpm (step S12). Thus, the washing dehydration tank 13 rotates once for about two seconds. The control unit 30 reads the frequency from the frequency detector 32 four times every 0.5 seconds, i.e., every time the washing dehydration tank 13 rotates about 90 degrees, and calculates the average value of the four detected values (step S13). Then, the load amount is determined based on the average value (step S14).

The washing water level and the water flow according to the load amount are determined (step S15), and the switching switch 36 is rolled down toward b so that the winding number of the coil 3 of the pressure sensor 1 is 300 turns (step S16). Thereby, the detection sensitivity by the pressure sensor 1 falls as mentioned above. Thereafter, by the processing of steps S17 to S19 similar to the steps S3 to S5 in FIG. 5, water supply to the washing water level is executed to start the washing operation. Thus, by detecting the detection value by the pressure sensor 1 while rotating the washing dehydration tank 13, and determining the load amount and quantity from the average value, even if there is only one pressure sensor 1, the influence of the uneven distribution of the laundry is corrected, The weight can be detected.

Fig. 10 is a control flowchart during dewatering stroke in the washing machine of the third embodiment. When washing and rinsing are finished and dehydration is started, the control unit 30 causes the switching switch 36 to fall to a side so that the number of windings of the coil of the pressure sensor 1 becomes 600 revolutions (step S21). Then, the motor 16 is driven to rotate to rotate the washing dehydration tank 13 at 60 rpm (step S22). Thus, the washing dehydration tank 13 rotates once for about 1 second. The control unit 30 reads the frequency from the frequency detecting unit 32 10 times every 0.1 seconds, i.e., every time the washing dehydration tank 13 rotates about 36 °, and shows the maximum value fmax and the minimum value among the 10 detection values ( fmin) is obtained (step S23). Then, the difference between the maximum value fmax and the minimum value fmin is calculated to determine whether the difference is equal to or greater than the first predetermined value (step S24). Since the larger the eccentric load due to the eccentricity of the laundry, the greater the variation in the detection value of the pressure sensor 1 during one rotation of the laundry dehydration tank 13, so that the eccentric load becomes more abnormal when the difference is greater than or equal to the predetermined value in the step S24. It judges that it is large, and it progresses to an imbalance correction operation (step S29).

If the difference between the maximum value fmax and the minimum value fmin is less than the first predetermined value in step S24, the controller 30 further increases the rotational speed of the washing dehydration tank 13 (step S25). Then, according to the rotational speed, the frequency is read from the frequency detection unit 32 four times (that is, every time it rotates about 90 °) while the washing dehydration tank 13 is rotated one time, and the maximum value is detected among the four detection values. fmax and the minimum value fmin are obtained (step S26). Since the rotational speed of the washing dehydration tank 13 gradually increases, the time interval for reading the frequency is also narrowed accordingly. Then, the difference between the maximum value fmax and the minimum value fmin is calculated to determine whether the difference is equal to or greater than the second predetermined value (step S27). If the vibration of the outer tub 11 increases while the rotational speed of the washing dehydration tank 13 increases, the variation of the detection value of the pressure sensor 1 during one rotation of the washing dehydration tank 13 becomes large. If the difference is greater than or equal to the second predetermined value in step S27, it is determined that the vibration is large and the process proceeds to the imbalance correcting operation (step S29). If the difference between the maximum value fmax and the minimum value fmin is less than the predetermined value in step S27, it is determined whether or not the predetermined dehydration time has ended (step S28), and the process returns to step S26 until the dehydration time ends. Then, when the dehydration time ends, the dehydration is terminated (step S30).

As described above, the unbalance correcting operation is to unload the laundry and to relocate it, and once the rotation of the laundry dehydration tank 13 is stopped, the appropriate amount of water is supplied into the outer tank 11, and then the stirrer 14 is turned on. Just rotate it. Of course, other methods only need to be able to rearrange ubiquitous laundry. In this way, it is possible to detect the eccentric load or the vibration caused by the uneven distribution of the laundry even with one pressure sensor 1.

<Example 4>

Next, as shown in the third embodiment, in the configuration in which the pressure sensor 1 is provided only in one suspension rod support anvil 24, the load, water level, and vibration are controlled using the pressure sensor 1. The washing machine according to the fourth embodiment (hereinafter referred to as "Example 4") in which the detection circuit to detect differs is demonstrated.

11 is an electric system configuration diagram of the main part of the washing machine according to the fourth embodiment. In the fourth embodiment, the detection circuit is wound around the DC power supply 41, the excitation circuit 42 and the constant current circuit 43 connected to the output end of the DC power supply 41, and the outer peripheral surface of the core 2. A switching switch 44 for selectively switching the current supplied to the coil 3, a current detecting circuit 45 and an amplitude detecting circuit 47 connected to an output end of the coil 3, and a microcomputer 40. And a switching switch 48 for selectively switching a signal supplied to the. The rotation speed of the motor 16 is input to the microcomputer 40, and switching of the switching switches 44 and 48 is controlled based on this rotation speed. That is, when the rotation of the motor 16 is stopped, the microcomputer 40 switches the switching switches 44 and 48 to the upper side in FIG. 11 to set the weight detection mode, and when the motor 16 is rotating. The switching switches 44 and 48 are switched to the lower side in Fig. 11 to set the vibration detection mode.

In the weight detection mode, the DC voltage output from the DC power supply 41 is switched by the excitation circuit 42 at predetermined cycles to become a square wave. This square wave is supplied to the coil 3 of the pressure sensor 1 via the switching switch 44. At this time, if a compressive force is applied to the core 2 by putting laundry into the laundry dehydration tank 13 or the like, the permeability of the core 2 changes according to the magnitude of the compressive force, and the impedance of the coil 3 is increased. Change. As a result, the magnitude of the current supplied from the coil 3 to the current detection circuit 45 changes, and the change is detected by the current detection circuit 45. The current detection circuit 45 is configured to output a voltage according to the magnitude of the detected current, which is input to the microcomputer 40 via the low pass filter 46. In the microcomputer 40, the load amount is judged based on this voltage value, and the quantity according to the load amount is supplied to the outer tank 11.

On the other hand, in the vibration detection mode, the current output from the DC power supply 41 becomes a predetermined DC current by the constant current circuit 43. This direct current is supplied to the coil 3 via the switching switch 44 to impart a constant magnetic field to the core 2. At this time, if vibration occurs in the washing dehydration tank 13, the magnetic permeability of the coil 3 changes as the magnetic permeability of the core 2 changes as in the case of the weight detection mode. Occurs. As the induced voltage V is represented by Equation 1 below, the amplitude of the induced voltage increases as the temporal change in proportion to the compressive force acting on the core 2 due to the vibration, that is, the higher the frequency of vibration.

V = -N (dØ / dt)

Where N is the number of turns of the coil

The amplitude detection circuit 47 detects this amplitude and supplies it to the microcomputer 40 as an analog voltage value. The microcomputer 40 performs A / D conversion on the analog voltage value, and based on the converted digital value, the presence or absence of rotation abnormality due to the eccentricity is determined. That is, the microcomputer 40 compares this digital value with a preset threshold value, and when exceeding the threshold value, judges that there is an abnormality in rotation due to the eccentricity, and controls such as stopping or decelerating the rotation of the motor 16. Do it. Here, the threshold which is a criterion for determination is a value set according to the load amount by the laundry put into the laundry dehydration tank 13 at the start of washing, and the larger the load acting on the outer tank 11 by the laundry, the larger the value is set. do. That is, even if the same vibration (change of the same acceleration) changes the load of the outer tank 11, the washing dehydration tank 13, and the laundry put therein, the change of the force detected by the pressure sensor 1 becomes large. On the contrary, when the load is small, the threshold for determining abnormal vibration is set low. Thereby, rotation abnormality detection is performed with high precision by changing a threshold value according to a load. Thereby, it becomes possible to prevent the breakage | damage and malfunction of each part of the washing machine by rotation abnormality.

Example 5

While the fourth embodiment has a configuration in which the weighing mode and the vibration measurement mode are switched based on the rotation of the motor 16, the washing machine of the fifth embodiment has a detection circuit having a configuration for simultaneously measuring load and vibration. 12 is an electric system configuration diagram of the main part of the washing machine according to the fifth embodiment. The detection circuit includes a DC power supply 51, an excitation circuit 52 connected to an output end of the DC power supply 51, and a current detection circuit connected to an output end of the coil 3 of the pressure sensor 1 ( 53, the first low pass filter 54 for weight detection and the second low pass filter 55 for vibration detection, the output end of the second filter 55 and the reference signal of the microcomputer 50. The comparator 56 connected to the output terminal ref is provided. Here, the cutoff frequency of the first low pass filter 54 is 100 Hz and the cutoff frequency of the second low pass filter 55 is 1 kHz with respect to the oscillation frequency 10 kHz of the excitation circuit 52.

The DC voltage output from the DC power supply 51 is oscillated at a frequency of 10 kHz, becomes a square wave, and is supplied to the coil 3 of the pressure sensor 1. At this time, the inductance of the coil 3 changes depending on the compressive force acting on the core 2, regardless of whether the washing dehydration tank 13 is in a rotating or stationary state. As a result, the magnitude of the current supplied from the coil 3 to the current detection circuit 53 changes, and the change is detected by the current detection circuit 53. The output of this current detection circuit 53 is configured to output a voltage according to the magnitude of the detected current, and the voltage is passed through the first low pass filter 54 to the A / D input terminal of the microcomputer 50. Is entered. In the microcomputer 50, the load acting on the core 2 after this voltage is A / D converted is measured, and the load is used to determine the water supply amount to the outer tub 11. That is, the water supply is started by setting the required water quantity according to the load, that is, the load amount, and after that, the water quantity is measured from the load acting on the outer tub 11, and when the water quantity reaches the set water quantity, the water supply is stopped at that time.

In the microcomputer 50, a reference signal is generated based on the measured load, and the signal is supplied from the output terminal ref to one input terminal of the comparator 56. This reference signal is set to a voltage value corresponding to a load 1.5 times the measured load. On the other hand, the output of the current detection circuit 53 is supplied to the other input terminal of the comparator 56 via the second low pass filter 55 and compared with the reference signal provided from the microcomputer 50. As a result, when the output waveform of the second low pass filter 55 exceeds the amplitude of the reference signal, the output is input to the microcomputer 50 and calculated. The microcomputer 50 determines that the rotation is abnormal when the calculated value exceeds a predetermined threshold within a predetermined period of time, and performs control such as stopping or decelerating the rotation of the motor 16. Thereby, it becomes possible to prevent the damage or failure of each part of the washing machine according to the rotation abnormality accompanying an eccentricity.

According to the washing machine of the fifth embodiment, the load and vibration acting on the outer tub 11 can be measured at the same time irrespective of whether or not the washing dehydration tank 13 is rotating, so that with the passage of time during dehydration, Even if the load fluctuates, it becomes possible to detect the abnormality of rotation of the washing dehydration tank 13 suitably. Moreover, since the load of the outer tank 11 is measured also during the rotation of the washing dehydration tank 13, it is comprised so that the dehydration state of the laundry in the washing dehydration tank 13 at the time of dehydration may be judged based on the change of this load. You may also In this case, since the rotation of the washing dehydration tank 13 can be controlled in accordance with the discharge state of the water from the laundry, it becomes possible to perform appropriate dehydration control.

<Example 6>

The fourth and fifth embodiments described above detect the rotational abnormality caused by the eccentricity of the laundry dehydration tank 13 based on the magnitude of vibration transmitted from the outer tank 11 to the pressure sensor 1 via the dustproof member 22. Although the sixth embodiment (hereinafter referred to as "Example 6") is a configuration in which the rotational abnormality caused by the eccentricity of the laundry dehydration tank 13 is accompanied by the load fluctuation accompanying the collision of the outer tank 11 and the suspension rod 12, It has a configuration to detect based on.

The suspension rod 12 in the washing machine of Example 6 is provided with the protrusion 26 which protrudes toward the outer tub 11, as shown in FIG. The protrusions 26 collide with the outer tank 11 at an inclination angle smaller than the minimum inclination angle among the inclination angles at which the outer tank 11 is inclined by the eccentricity of the laundry dehydration tank 13 and collides with the gas frame 10. It is set to the length. In such a configuration, when the outer tank 11 is inclined due to the eccentricity of the washing dehydration tank 13, the outer tank 11 collides with the protrusion 26, and the impact caused by the collision causes the suspension rod 12 to fall. It propagates and reaches the pressure sensor 1, and the magnitude of the compression force changes.

In the configuration in which the projections 26 are formed on the suspending rod 12 as in this embodiment, the dehydration operation, that is, the laundry dehydration tank 13, is carried out in a state in which 1 kg of the weight is eccentrically mounted in the washing dehydration tank 13. When the motor is rotated at high speed, as shown in Fig. 14, an amplitude of approximately 1.0 V maximum occurs. On the other hand, when the dehydration operation is performed with the suspension rod 12 having no protrusions 26 formed in the same manner as the center of 1 kg of eccentric arrangement, as shown in Fig. 15, the maximum amplitude is approximately 0.35 V. It can be seen that only occurs, and by forming the protrusions 26, the vibration is remarkably large. As a result, the difference between the vibration generated during the normal rotation and the vibration caused by the abnormality of rotation becomes clear, whereby the occurrence of the rotation abnormality can be detected more reliably. In the sixth embodiment, the outer shell 11 is formed with a thick portion 27 having the plate thickness of the portion where the protrusions 26 of the suspension rod 12 collide with each other. Thereby, since the strength of the outer tub 11 becomes high, it becomes possible to reduce the deformation | transformation and deterioration of the outer tub 11 by the collision with the protrusion 26 of the suspension rod 12.

In addition, in the said Examples 4-6, although the pressure sensor 1 was arrange | positioned only to one of the suspension rods 12 arrange | positioned at the four corners of the gas frame 10, the pressure sensor is provided in two suspension rods which are diagonally located. (1) may be arrange | positioned and the pressure sensor 1 may be arrange | positioned to four whole suspension rods 12 similarly to Example 1. FIG. Moreover, although the pressure sensor 1 was arrange | positioned between the suspension rod 12 and the base frame 10, you may arrange | position the pressure sensor 1 between the suspension rod 12 and the outer tank 11.

<Example 7>

Next, a washing machine according to a seventh embodiment of the present invention (hereinafter referred to as "Example 7") will be described. The washing machine of the seventh embodiment is an example in which the pressure sensor 1 is used only to detect an eccentric load, abnormal vibration, or the like. Fig. 16 is a side sectional view showing the structure of this washing machine, and Fig. 17 is an enlarged view of a portion B in the drawing. Since the electric system configuration of the washing machine of the seventh embodiment is the same as that of Fig. 4 or 6, the description thereof is omitted.

The pressure sensor 1 is embedded in an elastic member 62 such as rubber, and is interposed between the pressing plate 60 and the side plate of the base frame 10. The pressing plate 60 and the base frame 10 are fixed via the elastic member 63 by the bolt 61 which penetrates both. Even if the gas frame 10 vibrates, the pressure sensor 1 does not vibrate in phase and dynamic amplitude with it, so that an external load is applied to the pressure receiving portion 5 of the pressure sensor 1. The greater the vibration of the base frame 10, the greater the external load, so the inductance of the coil 3 changes according to the magnitude of the vibration. The gas frame 10 is vibrated by both the case where only the stirrer 14 rotates as in washing and rinsing, and when the stirrer 14 and the laundry dehydrating tank 13 rotate together as in the case of dehydration operation. do.

Fig. 18 is a control flowchart during washing operation in the washing machine of the seventh embodiment. When the washing operation is started and the stirrer 14 is driven to rotate at a predetermined rotational speed (step S41), water flow is generated in the laundry dehydration tank 13, and the laundry rotates in the horizontal direction while the water flows through the water flow in the vertical direction. The direction changes. Until a predetermined washing time has elapsed (until at step S42 becomes "Y"), the control unit 30 obtains a fluctuation range of the detection frequency from the frequency detector 32, and when the fluctuation range exceeds the predetermined value. ("Y" in step S43) The rotation speed of the motor 16 is reduced (step S44). As a result, the rotational speed of the stirrer 14 is lowered and the water flow is weakened. As a result, vibration of the gas frame 10 is reduced. If the fluctuation range is less than or equal to the predetermined value in step S43, it is determined that no abnormal vibration has occurred and the flow returns to step S42. When the predetermined washing time ends, the rotation of the stirrer 14 is stopped to end the washing operation (step S45).

Fig. 19 is a control flowchart at the time of dehydration operation in the washing machine of the seventh embodiment. When the dehydration operation is started and the motor 16 is started, the rotational speed of the washing dehydration tank 13 gradually rises (step S51). Until the predetermined dehydration time has elapsed (until at step S52 becomes "Y"), the control unit 30 obtains a fluctuation range of the detection frequency from the frequency detector 32, and when the fluctuation range exceeds the predetermined value. (Y in step S53) The process shifts to the previously described imbalance correction operation (step S54). After execution of the unbalance correcting operation, the flow returns to step S51 to increase the dehydration. If the fluctuation range is less than or equal to the predetermined value in step S53, it is determined that no abnormal vibration has occurred and the flow returns to step S52. When the predetermined dehydration time ends, the rotation of the washing dehydration tank 13 is stopped to end the dehydration operation (step S55).

As described above, in the washing machine according to the present invention, in order to detect the load amount, the weight of water, the eccentric load, or the vibration, a pressure sensor using a magnetization distortion element can be attached to various parts of the washing machine. In addition, all of the above embodiments are examples, and it is obvious that appropriate changes and modifications can be made within the scope of the present invention. For example, the above embodiment is an example in which the present invention is applied to a vortex type automatic washing machine in which a laundry dehydration tank is rotatably disposed about a vertical axis, but the present invention is applied to a drum type washing machine in which a drum is rotatable about a horizontal axis. Applicability is obvious. It is also clear that the present invention can be applied to a drum type dryer having the same structure.

According to the present invention, it is possible to provide a washing machine equipped with a compact and highly accurate load sensor without affecting the vibration suppression design or the rotation of the laundry dehydration tank, and the load sensor can be used not only to detect the load but also to detect the weight of water. It is also possible to provide a washing machine with a sensor that can also function as a water level sensor and can accurately detect the vibration of the washing dehydration tank and the outer tank at the time of dehydration.

Claims (23)

In the washing machine provided with a base frame, an outer tank suspended and supported in the interior of the base frame, and a laundry dehydration tank rotatably installed in the inside of the outer tank, a) installed at a portion subjected to an external force by the load of the laundry contained in the laundry dehydration tank and the weight of the water supplied, and detecting the change in the magnetic properties of the magnetostrictive element and the magnetostrictive element generated by the external force; A pressure sensor comprising a coil disposed proximate the magnetizing distortion element, b) measuring means for measuring the load amount and the weight of water based on the output of the coil of the pressure sensor; c) Before supplying water, the control unit acquires the load by the measuring means and determines the quantity of water to be watered in accordance with the load, and at the time of feeding, the water supply according to the quantity by detecting the weight of the water by the measuring means. With means, The pressure sensor is installed in at least one portion of the plurality of suspension rod pivot portions that support the suspension rod supporting the outer tub, Detecting the load applied to the suspension rod by the pressure sensor a plurality of times while rotating the laundry dehydration tank at a low speed, And said measuring means estimates the load amount and the weight of water based on the detected value. The vibration measuring apparatus according to claim 1, wherein the measuring means measures an eccentric load due to the eccentric load of the laundry contained in the laundry dehydration tank and / or the vibration due to the eccentric load based on the output of the coil of the pressure sensor. washer. In the washing machine provided with a base frame, an outer tank suspended and supported in the interior of the base frame, and a laundry dehydration tank rotatably installed in the inside of the outer tank, a) a magnetostriction element and a magnetostriction element generated by the external force, provided at a site subjected to an eccentric load due to the eccentric load of the laundry contained in the laundry dehydration tank and / or an external force due to the vibration caused by the eccentric load. A pressure sensor comprising a coil disposed proximate to the magnetizing distortion element to detect a change in magnetic property; b) measuring means for measuring said eccentric load and / or vibration based on the output of the coil of said pressure sensor, The pressure sensor is installed in at least one portion of the plurality of suspension rod pivot portions that support the suspension rod supporting the outer tub, Detecting the load applied to the suspension rod by the pressure sensor a plurality of times while rotating the laundry dehydration tank at a low speed, And said measuring means estimates an eccentric load or vibration based on the detected value. The washing machine according to any one of claims 1 to 3, wherein the measuring means detects a change in magnetic properties of the magnetization distortion element as a change in inductance of a coil. The washing machine according to any one of claims 1 to 3, wherein the pressure sensor is provided so as to be capable of switching a plurality of coils having different winding numbers. delete delete delete delete delete In the washing machine provided with a base frame, an outer tank suspended and supported in the interior of the base frame, and a laundry dehydration tank rotatably installed in the inside of the outer tank, a) a magnetostriction element and a magnetostriction element generated by the external force, provided at a site subjected to an eccentric load due to the eccentric load of the laundry contained in the laundry dehydration tank and / or an external force due to the vibration caused by the eccentric load. A pressure sensor comprising a coil disposed proximate to the magnetizing distortion element to detect a change in magnetic property; b) measuring means for measuring said eccentric load and / or vibration based on the output of the coil of said pressure sensor, Washing machine, characterized in that for attaching the pressure sensor to the gas frame to convert the vibration of the gas frame to an external force and detected by the pressure sensor. In the washing machine provided with a base frame, an outer tank suspended and supported in the interior of the base frame, and a laundry dehydration tank rotatably installed in the inside of the outer tank, a) the magnetostrictive element which is installed at a site which receives an external force due to the load applied to the external tank and the vibration generated in the external tank and detects a change in the magnetic properties of the magnetostrictive element and the magnetostrictive element generated by the external force; A pressure sensor comprising a coil disposed proximate the; b) measuring means for measuring the load and vibration based on the output of the coil of the pressure sensor, The outer tub is suspended and supported by a plurality of suspension rods, and the pressure sensor is supported by one end of a suspension rod side support portion formed at an end of the suspension rod, and the other end is supported by a gas frame side support portion disposed in the gas frame. Washing machine. The washing machine according to claim 12, wherein the measuring means is provided with a weight measuring mode for measuring the load and a vibration measuring mode for obtaining the vibration. The control means according to claim 13, wherein the switching means sets the measurement means to the vibration measurement mode when the laundry dehydration tank is rotating, and sets the measurement means to the weight measurement mode when the laundry dehydration tank is stopped. Washing machine comprising a. The washing machine according to claim 14, wherein the control means determines that the rotation is abnormal when the magnitude of the vibration obtained by the measuring means is larger than a predetermined threshold. The washing machine according to claim 15, wherein the control means sets the predetermined threshold value based on the magnitude of the load obtained by the measuring means. The washing machine according to claim 12, wherein the measuring means has a weight vibration measuring mode for simultaneously measuring the load and vibration acting on the outer tub. delete delete delete delete delete delete