JPH0975579A - Electric washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent water leakage and water shortage exceeding a water pressure range guaranteed for a water supply valve by detecting a water pressure in a water supply hose in an electric washing machine in which water is supplied by a water supply valve from a faucet through a water supply hose. SOLUTION: One end of a water supply hose the other end of which is connected to a faucet is connected to a water supply valve 9 which supplies water into a washing/dewatering drum, and a water pressure detection means 19 is set in the water supply valve 9 to detect a water pressure in the water supply hose. A control means 21 controls the water supply valve 9 as well as controls a series of stages such as washing, rinsing, dewatering, etc., and if an output of the water pressure detection means 19 exceeds a prescribed water pressure range, a stage being performed is stopped, and a notification means 24 notifies it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric washing machine for supplying water from a water faucet through a water supply hose by a water supply valve.

[0002]

2. Description of the Related Art Generally, there is a demand for improvement so that the water in the water supply hose will not be scattered when the water supply hose of the electric washing machine is removed from the tap of the water supply.

Conventionally, this type of electric washing machine is generally equipped with a water supply valve on the main body of the washing machine, one end of a water supply hose is connected to this water supply valve, and the other is connected to a water tap.

[0004]

In such a conventional structure, the water supply valve has a guaranteed range of performance at a predetermined water pressure. However, the user can sensuously estimate these water pressures. However, when used at a low water pressure that does not fall within the guaranteed range of these water pressures, the watertight performance deteriorates and water leaks from the valve seat of the packing.
On the other hand, in the case of high water pressure, the flow rate control valve provided in the water supply valve may be deformed by the water pressure, making it impossible to supply water.
In addition, water hammer with high water pressure (water hammer effect)
However, there is a problem in that, depending on the water pressure, the body of the water supply valve deteriorates, causing water leakage in the worst case.

In addition, when foreign matter is clogged in the valve seat portion of the water supply valve, the cleaning performance is deteriorated due to the detergent liquid being diluted without stopping the water supply even when the water level reaches the set level during washing, and during dehydration. If water continues to be supplied, there is a problem in that water accumulates in the dehydration tank and the dehydration tank becomes heavy, which causes insufficient torque in the motor and causes rotation failure.

Further, when the washing is started by supplying water up to the set water level, the air contained in the clothes is released and the clothes are washed at a water level lower than the initially set water level.
As a result, there are problems that an extra load is applied to the motor and the clothes are damaged.

The amount of clothes set with respect to the water level is generally set to a certain range, for example, the cloth amount is 4 to 6 kg at a high water level. When the lower limit of the set amount of cloth is washed, the amount of water becomes larger than when the upper limit of the amount of cloth is washed. There was a problem that it used a lot of water.

Further, in a washing machine capable of displaying the remaining time required for the washing process, the water supply time is generally set to the time required for water supply at standard water pressure. However, with such a configuration, when the washing machine is used in a region where the water pressure is low, there is a problem that it takes longer than the set water supply time, and conversely, it ends early in a region where the water pressure is high. there were.

Further, the water supply valve is equipped with a protective filter for preventing foreign matter from entering. If the protective filter is clogged, the pipe line resistance increases and the flow rate decreases,
There was a problem that the water supply time was long.

Further, when the water pressure is high during the water rinsing, the water supply amount of the water supply valve increases and the amount of water used increases. there were.

Further, if the water supply hose is left under the pressure of water in the winter, the water in the water supply hose freezes and expands, and the volume expansion causes the main body of the water supply valve to crack and cause water leakage. There was a problem.

The present invention solves the above-mentioned problems, and it is a first object of the present invention to detect the water pressure in a water supply hose so as not to exceed the guaranteed range of the water pressure of the water supply valve to cause water leakage or poor water supply. Has an aim.

A second object is to prevent deterioration of cleaning performance and rotation failure even if the water supply valve fails.

A third object is to prevent an extra load from being applied to the motor and damage to the clothes even if the air contained in the clothes is released during washing.

A fourth object of the present invention is to prevent the cloth from rotating too much depending on the amount of cloth, resulting in a large damage to the cloth and not to use an excessive amount of water.

A fifth object is to prevent the displayed remaining time from being greatly deviated due to fluctuations in water pressure.

A sixth object of the present invention is to prevent the water supply time from being lengthened by clogging of the filter of the water supply valve.

A seventh object is to prevent an increase in the amount of water used at the time of rinsing with water due to fluctuations in water pressure and a reduction in rinsing performance.

An eighth object is to prevent the water supply valve from cracking due to freezing or the like in winter and causing water leakage.

[0020]

In order to achieve the first object, the present invention provides a water supply valve for supplying water to a washing / dehydrating tank,
A water supply hose having one end attached to a water faucet and the other end connected to the water supply valve, water pressure detection means provided in the water supply valve for detecting water pressure in the water supply hose, display means or notification means, and the water supply valve And a control means for controlling a series of strokes such as washing, rinsing, and dehydration, and the control means temporarily suspends the stroke when the output of the water pressure detection means is out of a predetermined water pressure range. The first problem solving means is that the notification is made by the notification means or the like.

In order to achieve the second object,
As a second problem solving means, the control means of the first problem solving means detects a malfunction of the water supply valve based on a difference between outputs of the water pressure detecting means when the water supply valve is on and when the water supply valve is off. There is.

In order to achieve the third object,
In addition to the first problem solving means, a water level detecting means for detecting the water level in the washing / dehydrating tub is provided, and the control means detects the predetermined water level by the water level detecting means, and then outputs the output of the water pressure detecting means. The third problem solving means is to supply water according to the amount of water supply calculated from the water supply time.

In order to achieve the fourth object,
In addition to the first problem solving means described above, a cloth amount detecting means for detecting the amount of clothes in the washing / dehydrating tank is provided, and the control means responds to the output of the cloth amount detecting means and the output of the water pressure detecting means. ,
The fourth problem solving means is to supply a predetermined amount of water.

In order to achieve the fifth object,
The control means of the first problem solving means calculates the water supply time based on the output of the water pressure detection means and displays the remaining time on the display means as the fifth problem solving means.

In order to achieve the sixth object,
A sixth aspect of the present invention is that the control means of the first problem solving means detects clogging of a filter of the water supply valve based on a ratio of outputs of the water pressure detection means when the water supply valve is on and when the water supply valve is off.
Is used as a means for solving the problem.

In order to achieve the seventh object,
The control means of the first problem solving means has a seventh problem solving means that the water rinsing time is made variable by the output of the water pressure detecting means during the water rinsing.

In order to achieve the above eighth object,
In addition to the first problem solving means, a temperature detecting means for detecting an air temperature or a water temperature is provided, and the control means controls the antifreezing means according to the output of the temperature detecting means and the output of the water pressure detecting means. This is the eighth means for solving the problem.

[0028]

According to the first means for solving the above problems, the present invention provides:
It is possible to check the water pressure guaranteed range of the water supply valve, water hose, etc. by detecting the water pressure inside the water supply hose by providing the water pressure detection means on the water supply valve and making a judgment within the predetermined water pressure guaranteed range by the output of the water pressure detection means. In the guaranteed range or less, water leakage due to deterioration of watertightness can be prevented, and conversely, in the guaranteed range or higher, reliability of the water supply valve and the like can be secured and water leakage due to deterioration of the water supply valve can be prevented in advance.

Further, by the second problem solving means, the signal from the water pressure detecting means is the same as or lower than that of the water supply even after the water level detecting means completes the water supply to the predetermined water level and turns off the water supply valve. If so, it can be determined that the water supply has been kept due to foreign matter adhering to the water supply valve. By confirming these malfunctions, it is possible to prevent deterioration of cleaning performance and start-up defects due to water supply during dehydration.

The water supply amount is calculated in advance by the water pressure detected by the water pressure detecting means and the water supply time by the third problem solving means, and the calculated water supply is performed even after the predetermined water level is detected by the water level detecting means. By continuing to supply water until the volume reaches the limit, it is possible to continue supplying water in the makeup water part where the water level decreases due to agitation of clothes, and prevent overload on the motor and damage to clothes due to lowering of the water level. You can

Further, by the fourth problem solving means, the necessary water supply amount is calculated and water is supplied to the cloth amount judged by the cloth amount detecting means, so that a constant bath ratio (cloth amount 1
The amount of water per kg) can be used for washing, and it is possible to prevent the cloth from rotating too much due to an excessive amount of water, and to prevent the motor from being overloaded and the fabric from being damaged due to an insufficient amount of water.

In addition, by the fifth problem solving means, the water supply time can be calculated by calculating the water supply time from the output of the water pressure detecting means, and the remaining time of the washing process can be calculated from the setting of the water supply time. It can be displayed almost accurately, and when using a washing machine in a low water pressure area, it takes longer than the set water supply time, and conversely it ends early in a high water pressure area. can do.

According to the sixth means for solving the problems, when the outputs of the water pressure detecting means when the water supply valve is on and when they are off exceed the predetermined values of the dynamic water pressure and the static water pressure, respectively, the water supply valve is turned on. It is possible to confirm that the protective filter for removing foreign matter attached to the water outlet side is clogged, and it is possible to prevent the problem that the flow rate extremely decreases and the water supply time becomes long.

Further, by the seventh means for solving the problems, even if the water supply amount changes due to the water pressure, by varying the water supply time until reaching the predetermined water supply amount and the water rinsing time, the rinsing performance is deteriorated due to the insufficient water supply amount. Can be prevented.

Further, according to the eighth means for solving the problems, when the temperature detecting means causes the temperature to fall below a predetermined temperature and the abnormality is notified according to the output of the water pressure detecting means, the volume is expanded before freezing. It is possible to prevent deterioration of the water supply valve washing machine body.

[0036]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.
Will be described with reference to.

As shown in FIG. 2, an outer tub 2 is provided in the main body 1 of the washing machine, a washing / dehydrating tub 3 is provided in the outer tub 2, and a stirring blade 4 is provided at the bottom of the washing / dehydrating tub 3. Is rotatably provided, and the motor 5 drives the washing / dehydrating tub 3 or the stirring blades 4. A drain valve 7 is attached to the drain port 6 on the outer tank side at the bottom of the outer tank 2.
Is installed. A water supply valve 9 is attached to a panel box 8 on the upper rear side of the washing machine body 1.

One end of the water supply hose 10 is attached to a water faucet (not shown), and the other end of the water supply hose is fixed to the water supply valve 9 with a mounting nut 11, and the water supply pipe 9 and the water supply box 13 are fixed by the water supply valve 9.
Water is supplied to the washing / dehydrating tank 3 via the. The control device 14 is mounted on the upper portion of the washing machine body 1, and the operation plate 15 is mounted on the upper surface.

The control device 14 is constructed as shown in FIG. 1, and the operation input means 16 is, as shown in FIG. 3, the water supply level, washing time, rinsing frequency, dehydration time, start / pause, etc. Make an input. The water level detection means 17 detects the water level of the washing / dehydrating tub 3. The cloth amount detecting means 18 detects the amount of cloth in the washing / dehydrating tub 3 by the voltage pulse when the stirring blade 4 is energized for a short period of time several times and then turned off. The water pressure detection means 19 detects the water pressure in the water supply hose 10, as described later. The decompression setting means 20 keeps the water supply valve 9 for a predetermined time (for example, 3 when the water faucet is closed).
It is turned on for a second) to reduce the water pressure in the water supply hose 10.

These outputs are input to the control means 21, and the control means 21 controls the motor 5, the drain valve 7, the water supply valve 9 and the like via the power switching means 22 to perform a series of washing, rinsing, dehydration and the like. Control the process. Display means 23
As shown in FIG. 3, the water supply water level, the washing time, the number of rinses, and the dehydration time are displayed, and the remaining time is displayed by the numeral display 23a, and the water pressure detection means 19 is displayed by the water pressure display lamp 23b. The detected water pressure in the water supply hose 8 is displayed. The notification means 24 is configured by a buzzer and emits a sound.

The water supply valve 7 is constructed as shown in FIG. 4, the water supply valve main body 25 is provided with a water inlet 26 and a water outlet 27 to which the water of the water supply hose 10 is supplied, and the water outlet 27 is used for washing. It is also connected to the other end of a water supply pipe 12 whose one end is attached to a water supply box 13 for supplying water into the dewatering tank 3. An auxiliary pressure holding chamber 31 is provided in a part of the pressure holding chamber 28 communicating with the water inlet 26 via a diaphragm plate 30 provided with a bleed hole 29, and a valve seat 32 opened and closed by the diaphragm plate 30 has a water outlet 33. Through the water outlet 27. The water receiving plate 34, to which the diaphragm plate 30 is attached, has a relief hole 35.
Is provided.

The coil 36 has a winding 38 wound around a bobbin 37, and a sleeve 4 is provided inside the coil 36 via a reinforcing ring 39.
0 is stuck in water. An actuator 41 is slidably housed in a sleeve 40, an auxiliary spring 42 is provided at one end of the actuator 41, and the other end of the actuator 41 abuts a relief hole 35 of a water receiving plate 34 through a bush 43 to energize a water seal. are doing. On the other hand, a water pressure detecting means 19 composed of a piezoelectric element or the like is provided on the sleeve 40, and the water pressure detecting means 19 is sandwiched and fixed by a mounting plate 44. A substantially circular recess 45 is formed in the sleeve 40. The flow rate control valve 45 is configured so that the flow rate characteristic changes depending on the hydraulic pressure.
The filter 46 serves to remove foreign matter.

When the output of the water pressure detection means 19 is out of the predetermined water pressure range, the control means 21 suspends the stroke and informs the notification means 23 or the like.

The operation of the above structure will be described with reference to FIG. 5. In step 51, the control means 21 starts the program. In step 52, the water supply valve 9 is turned on to supply water, and then in step 53, the water pressure A in the water supply valve 9 is measured by the water pressure detection means 19. This water pressure A corresponds to the so-called hydraulic pressure, which is the water pressure in the water supply.

Generally, the flow rate characteristic of the water supply valve 9 is changed by the line resistance in the line including the water supply hose 10, the faucet, and the water supply pipe. In this embodiment, the minimum water pressure at which the valve seat can be water-sealed 1
From 0.3 kg per square centimeter to the water supply valve body 25
The maximum water pressure that can secure the strength is guaranteed in the range of 10 kg per 1 cm 2.

Therefore, in step 54, the water pressure is judged whether or not the water pressure A is within the guaranteed range, and if it is within the range, the water pressure display lamp 23b is judged in step 55.
Turn on and proceed to the next step. If it is out of the range, the stroke is temporarily stopped and the water supply valve 9 is turned off at step 56.
In step 57, the notification buzzer is turned on, and in step 58, the water pressure display lamp 23b blinks to set the mode indicating that the water pressure is abnormal.

As described above, according to the present embodiment, the pressure inside the water supply valve 9 is detected and it is judged whether or not the water pressure is within the guaranteed range, so that the water supply valve 9 and the water supply hose 10 are checked.
You can check the water pressure guarantee range such as, and if it is less than the guarantee range, you can prevent water leakage due to deterioration of watertightness. On the contrary, if it is above the guarantee range, you can secure the reliability of the water supply valve 9 etc. Leakage can be prevented in advance.

Next, a second embodiment of the present invention will be described. The control means 21 in FIG. 1 detects a malfunction of the water supply valve 9 based on the difference between the outputs of the water pressure detection means 19 when the water supply valve 9 is on and when it is off. The other structure is the same as that of the first embodiment.

The operation of the above structure will be described with reference to FIG. 5. From step 51 to step 55, the operation is similar to that of the first embodiment, and the water level detected by the water level detecting means 17 is set in step 59. It is determined whether or not the water level is reached. If the set water level is reached, the water supply valve 9 is turned off in step 60, and the water pressure B in the water supply valve 9 is measured in step 61. This water pressure B corresponds to a state where no water is supplied, that is, a hydrostatic pressure.

Next, in step 62, it is judged whether or not the hydrostatic pressure B is higher than the hydrodynamic pressure A measured in step 53. If it is higher, the motor 5 is turned on in step 63 to proceed to the next stroke. move on. If the static water pressure B is the same as or lower than the dynamic water pressure A, it is determined that the water supply is still on, including the water supply leakage, the process is temporarily stopped, and the process goes to the failure mode of the water supply valve 9 from steps 56 to 58. . The pressure change of the water supply valve 9 due to the steps 60 and 61 is always judged during the stroke except when water is supplied.

As described above, according to the present embodiment, even after the water level detecting means 17 completes the water supply to the predetermined water level, the output from the water pressure detecting means 19 is the same as or lower than that of the water supply. For example, it can be determined that the water supply valve 9 keeps the water supply due to the adhesion of foreign matter. By confirming these failure determinations, it is possible to prevent deterioration of cleaning performance and start-up failures due to water supply during dehydration.

Next, a third embodiment of the present invention will be described. The control means 21 in FIG.
After a predetermined water level is detected by 7, water is supplied according to the output of the water pressure detection means 19 and the water supply amount calculated from the water supply time. The other structure is the same as that of the first embodiment.

The operation of the above structure will be described with reference to FIG. 6. The water supply valve 9 is provided with a flow rate adjusting valve 45, and as shown in FIG. 6, the flow rate characteristic is changed by the dynamic water pressure. ing. In the present embodiment, since the hydraulic pressure can be measured by the hydraulic pressure detection means 19, the required amount of water can be easily calculated from the flow rate characteristic.

Therefore, even if a signal indicating the set water level is output from the water level detecting means 17 with respect to the set water level, the water supply valve 9 is kept on until the required amount of water is supplied. However, if water remains in the washing / dehydrating tub 3 or if clothes are wet, the water level rises more than necessary and the water will not be reduced from the overflow part when the clothes are stirred. In the embodiment, the amount of replenishment water for each water level is set up to an upper limit of 2 liters.

As described above, according to this embodiment, the water supply amount based on the water pressure and the water supply time is calculated in advance, and even after the signal of the water level detecting means 17 reaches the predetermined water level, the clothes are stirred. It is possible to prevent the overload on the motor 5 and the damage to the clothes due to the decrease in the water level by supplying water with the amount of water in the makeup water portion where the water level decreases.

Next, a fourth embodiment of the present invention will be described. The control means 21 in FIG.
According to the output of 8 and the output of the water pressure detection means 19, (Table 1)
As shown in, a predetermined amount of water is supplied. The other structure is the same as that of the first embodiment.

[0057]

[Table 1]

To explain the operation in the above configuration, conventionally, the amount of water and the range of washable clothes were determined for each set water level, but in the present embodiment, the bath ratio is set for each water level, for example, 1 kg at a high water level. It is set to 8 liters per hit, and it is possible to supply the required amount of water by calculating from the numerical values measured by the cloth amount detecting means 18 and the water pressure detecting means 19 so that the bath ratio is always constant.

As described above, according to this embodiment, it is possible to always wash with a constant bath ratio, without using too much water, and overloading the motor 5 due to excessive cloth rotation due to excessive water volume or insufficient water volume. It is possible to prevent the damage and the cloth damage.

Next, a fifth embodiment of the present invention will be described. The control means 21 in FIG.
The water supply time is calculated from the output of 9 and the remaining time is displayed on the display means 23. The other structure is the same as that of the first embodiment.

To explain the operation in the above configuration, the flow rate of the water supply valve 9 can be calculated by the water pressure detection means 19, and the time required to supply the required amount of water to the set water level can be calculated. You can Therefore, the accurate remaining time is displayed on the numerical display 23a based on this required time.
Can be displayed on.

As described above, according to the present embodiment, it is possible to calculate an almost accurate water supply time, display the remaining time of the washing process almost accurately from the setting of these water supply times, and the water pressure is low. It is possible to solve the problem that when a washing machine is used in a region, it takes longer than the set water supply time, and conversely, it ends early in a region where the water pressure is high.

Next, a sixth embodiment of the present invention will be described. The control means 21 in FIG. 1 detects clogging of the filter 46 of the water supply valve 9 based on the ratio of the output of the water pressure detection means 19 when the water supply valve 9 is on and when it is off. The other structure is the same as that of the first embodiment.

The operation of the above structure will be described. Although the filter 46 provided in the water supply valve 9 serves to remove foreign matters, the filter 46 will be used over a long period of time.
There was a problem that foreign matter adhered to the whole, the pipe area was reduced, and the amount of water supply decreased. In the present embodiment, when the output B of the hydraulic pressure detection means 19 at the hydrostatic pressure exceeds the predetermined range A of the output A at the hydrostatic pressure, for example, when B / A <50%, FIG. Proceed to the failure mode described above and notify of water supply abnormality.

Since the clogging of the filter 46 is different from other abnormalities of the water supply valve, the sounding cycle of the notification buzzer is changed so that it can be easily identified. The same effect can be obtained not only in comparison with the hydraulic pressure but also in the case where the predetermined range is set by the correlation between the hydrostatic pressure and the time until the water level detection means 17 is turned on.

As described above, according to the present embodiment, when the output of the water pressure detecting means 19 is when the water supply valve 9 is on and when the water hydraulic pressure level and the hydrostatic pressure level exceed predetermined values, respectively, A filter 46 attached to the water supply valve 9 for removing foreign matter
It can be determined that the clogging is due to clogging, and it is possible to prevent the problem that the flow rate extremely decreases and the water supply time becomes long.

Next, a seventh embodiment of the present invention will be described. The control means 21 in FIG. 1 makes the pouring rinse time variable by the output of the water pressure detecting means 19 during the pouring rinse. The other structure is the same as that of the first embodiment.

To explain the operation in the above structure, conventionally, in the process of rinsing with water, there is a method of stirring the clothes for a predetermined time while turning on the water supply valve 9, and if the water pressure is high, use more water than necessary. On the contrary, when the water pressure is low, there is a problem that the rinsing performance is lowered. In this embodiment, since the flow rate can be calculated from the output (hydraulic pressure) of the water pressure detecting means 19, the water supply amount can be changed by changing the water injection time during the water rinsing to a predetermined water injection amount according to the output of the water pressure. It is possible to prevent a decrease in rinsing performance due to a shortage.

Further, the water supply valve 9 may be turned on and off by performing a calculation so that the time for each rinse is set to 2 minutes so that the agitation time becomes long and the clothes are not damaged.

As described above, according to the present embodiment, by varying the water supply time and the water pouring rinsing time until the predetermined water supply amount is reached even if the water supply amount changes due to the water pressure, the rinsing performance due to the insufficient water supply amount is improved. The decrease can be prevented.

Next, an eighth embodiment of the present invention will be described. The control means 21 in FIG. 1 controls the antifreezing means according to the output of a temperature detection means (not shown) for detecting the air temperature or the water temperature and the output of the water pressure detection means 19. The other structure is the same as that of the first embodiment.

To explain the operation in the above configuration, when the temperature or water temperature detected by the temperature detecting means is below a predetermined level (for example, 1 ° C.) and the water pressure is applied from the output of the water pressure detecting means 19, It judges that there is a freezing abnormality and sounds an alarm buzzer. At the same time, the water supply valve 9 is turned on for a short period of time, and if the output of the water pressure detecting means 19 decreases, the abnormal mode is released. When the output of the water pressure detection means 19 does not change, the water supply valve 9 is turned on for a short time every hour.

As described above, according to this embodiment, when the temperature or the water temperature becomes lower than the predetermined value by the temperature detecting means,
Moreover, the abnormality is notified according to the output of the water pressure detection means 19,
It is possible to prevent deterioration of the water supply valve 9 due to volume expansion during freezing.

[0074]

As described above, according to the present invention, a water supply valve for supplying water to a washing / dehydrating tank, a water supply hose having one end attached to a water faucet and the other end connected to the water supply valve, and a water supply valve provided in the water supply valve are provided. The control means comprises a water pressure detection means for detecting the water pressure in the water supply hose, a display means or an informing means, and a control means for controlling the water supply valve and controlling a series of steps such as washing, rinsing and dehydration. When the output of the water pressure detection means is out of the predetermined water pressure range, the stroke is temporarily stopped and the notification means or the like notifies the water pressure, so that the water pressure in the water supply valve is measured to guarantee the water pressure. By checking whether the water pressure is within the range, the water pressure guarantee range of the water supply valve and water hose can be confirmed. Then water supply Can ensure reliability equal, the water leakage due to deterioration of the water supply valve can be prevented.

Further, since the control means detects the malfunction of the water supply valve based on the difference between the outputs of the water pressure detection means when the water supply valve is on and when it is off, even after the water supply is completed up to a predetermined water level. If the output from the water pressure detection unit is the same as or lower than that of the water supply, it can be determined that the water supply has been kept due to foreign matter adhering to the water supply valve, etc. It is possible to prevent startup failures due to water supply during dehydration or dehydration.

Further, the water level detecting means for detecting the water level in the washing / dehydrating tub is provided, and the control means detects the predetermined water level by the water level detecting means, and then the water supply calculated from the output of the water pressure detecting means and the water supply time. Since the makeup water is supplied according to the amount, the amount of water supplied based on the water pressure and the water supply time is calculated in advance, and even after the output of the water level detection means reaches the predetermined water level, the water level will be maintained by stirring the clothes. It is possible to prevent the overload on the motor and the damage to the clothes due to the lowered water level by supplying water with the decreasing amount of makeup water.

Further, it is provided with a cloth amount detecting means for detecting the amount of clothes in the washing / dehydrating tank, and the control means provides a predetermined water supply amount in accordance with the output of the cloth amount detecting means and the output of the water pressure detecting means. Since water is supplied, it is possible to always wash with a constant bath ratio, without using too much water, and preventing excessive rotation of the cloth due to excessive water volume and overload on the motor and damage to the cloth due to insufficient water volume. can do.

Further, the control means calculates the water supply time from the output of the water pressure detection means and displays the remaining time on the display means, so that the water supply time can be calculated almost accurately. The remaining time of the washing process can be displayed almost accurately from the setting of, and when the washing machine is used in an area with low water pressure, it takes longer than the set water supply time, and conversely in areas with high water pressure. It is possible to solve the problem that it ends early.

Further, the control means detects the clogging of the filter of the water supply valve based on the ratio of the output of the water pressure detection means when the water supply valve is on and when the water supply valve is off. When the specified values of the hydrodynamic pressure and the hydrostatic pressure are exceeded when turning on and off respectively, it can be confirmed that the foreign matter removal filter mounted on the inlet side of the water supply valve is clogged, and the flow rate is extremely high. It is possible to prevent the problem that the water supply decreases and the water supply time becomes long.

Further, since the control means makes the water pouring rinse time variable by the output of the water pressure detecting means at the time of water pouring rinsing, the water supply time until the predetermined water supply quantity is reached even if the water supply quantity is changed by the water pressure. By varying the water rinsing time with water, it is possible to prevent deterioration of rinsing performance due to insufficient water supply.

Further, the temperature detecting means for detecting the air temperature or the water temperature is provided, and the control means controls the antifreezing means in accordance with the outputs of the temperature detecting means and the water pressure detecting means. It is possible to prevent the deterioration of the water supply valve due to the volume expansion before freezing when the air temperature or the water temperature becomes lower than a predetermined value by the detection means and the abnormality is notified according to the output of the water pressure detection means.

[Brief description of drawings]

FIG. 1 is a block circuit diagram of an electric washing machine according to a first embodiment of the present invention.

FIG. 2 is a vertical sectional view of the electric washing machine.

FIG. 3 is a front view of an operation display unit of the electric washing machine.

FIG. 4 is an enlarged sectional view of a water supply valve of the electric washing machine.

FIG. 5 is an operation flowchart of the electric washing machine.

FIG. 6 is a flow rate characteristic diagram of a water supply valve of the electric washing machine.

[Explanation of symbols]

 3 Washing / Dehydrating Tank 9 Water Supply Valve 10 Water Supply Hose 19 Water Pressure Detection Means 21 Control Means 23 Display Means 24 Notification Means

Claims (8)

[Claims] 1. A water supply valve for supplying water to a washing / dehydrating tub, a water supply hose having one end attached to a water faucet and the other end connected to the water supply valve, and a water pressure provided in the water supply valve for detecting water pressure in the water supply hose. Water pressure detection means, display means or notification means,
And a control means for controlling a series of strokes such as washing, rinsing, and dehydration as well as controlling the water supply valve, wherein the control stroke is controlled when the output of the water pressure detection means is out of a predetermined water pressure range. An electric washing machine that is temporarily stopped and notified by means of notification means. 2. The electric washing machine according to claim 1, wherein the control means detects a malfunction of the water supply valve based on a difference between outputs of the water pressure detection means when the water supply valve is on and when the water supply valve is off. 3. A water level detecting means for detecting the water level in the washing / dehydrating tub, wherein the control means detects the predetermined water level by the water level detecting means, and then calculates the water supply from the output of the water pressure detecting means and the water supply time. The electric washing machine according to claim 1, wherein makeup water is supplied according to the amount. 4. A cloth amount detecting means for detecting the amount of clothes in the washing / dehydrating tank is provided, and the control means provides a predetermined water supply amount according to the output of the cloth amount detecting means and the output of the water pressure detecting means. The electric washing machine according to claim 1, wherein water is supplied. 5. The electric washing machine according to claim 1, wherein the control means calculates the water supply time based on the output of the water pressure detection means and displays the remaining time on the display means. 6. The electric washing machine according to claim 1, wherein the control means detects clogging of a filter of the water supply valve based on a ratio of outputs of the water pressure detection means when the water supply valve is on and when the water supply valve is off. 7. The electric washing machine according to claim 1, wherein the control means makes the water rinsing time variable by the output of the water pressure detecting means at the time of water rinsing. 8. A temperature detecting means for detecting an air temperature or a water temperature is provided, and the control means controls the antifreezing means in accordance with an output of the temperature detecting means and an output of the water pressure detecting means. Electric washing machine as described.