JPH09108493A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve rinsing performance and to shorten time for rinsing by improving efficiency of rinsing concerning a washing machine provided with a drain pump for forcedly draining washing liquid. SOLUTION: A pulsator is arranged on the bottom of a spinning tub so as to be freely rotated, and this pulsator is driven by a motor 4. Water is supplied into the spinning tub by a water supply valve 6, the washing liquid in the spinning tub is forcedly drained by a drain pump 10, and the level of water in the spinning tub is detected by a water level detecting means 20. A control means 16 successively controls the respective processes of washing, rinsing and dehydrating and performs a water injection rinsing process for simultaneously performing water supply due to the water supply valve 6 and drainage due to the drain pump 10 while rotating the pulsator.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine equipped with a drainage pump for forcibly draining washing liquid.

[0002]

2. Description of the Related Art Conventionally, this type of washing machine has been constructed as shown in FIG. The configuration and operation will be described below.

As shown in the figure, the water receiving tub 1 has a washing / dehydrating tub 2 rotatably disposed therein, and a pulsator 3 is rotatably provided on the bottom of the washing / dehydrating tub 2. ing. The motor 4 drives the pulsator 3 and the washing / dehydrating tub 2 via the speed reducer 5. The water supply valve 6 supplies tap water from the water supply nozzle 7 through the detergent case 8 to the washing and dehydrating tub 2 through the water supply port 9. The drainage pump 9 drains the washing liquid in the washing / dehydrating tub 1 to the outside of the machine via the drainage hose 10.

A fluid balancer 12 for damping dehydration vibration is fixed to the upper end of the washing / dehydrating tub 2. Control device 1
Reference numeral 3 controls the operations of the motor 4, the water supply valve 6, the drainage pump 9, and the like, and sequentially controls the steps of washing, rinsing, and dehydrating, and is provided on the upper surface of the washing machine body 14.

In the above structure, the operation will be described with reference to FIG. 7. When laundry and detergent are put into the washing / dehydrating tub 2 and a start button (not shown) is pressed, the washing process starts and water is supplied. The valve 6 is opened, and tap water is supplied from the water supply port 9 into the washing / dehydrating tub 2 up to a predetermined water level according to the amount of cloth.
Then, the pulsator 3 arranged at the bottom of the washing / dehydrating tank 2 is agitated to start washing. When the washing process is finished, the rinsing process 1 is started, and the drainage pump 10 pumps the washing liquid through the drainage hose 11 to a position higher than the water surface of the washing and dehydrating tub 2 and drains it.

Next, the washing / dehydrating tub 2 is rotated at a high speed to centrifugally dewater the washing liquid contained in the laundry, and then the drainage pump 1
Stop 0. As for rinsing, tap water is stored in the washing / dehydrating tank 2 as in the case of washing, and the rinsing is performed by stirring with the pulsator 3. Thereafter, a rinsing step 2 is performed in the same manner, and finally the rinsing liquid is drained and the laundry is centrifugally dehydrated to complete the washing.

[0007]

In such a conventional configuration, since the water is pumped up to a position higher than the water surface of the washing / dehydrating tank 2 and drained, tap water is poured to wash the washing liquid. However, there is a problem that the rinsing performance cannot be improved and the rinsing time cannot be shortened.

The present invention is intended to solve the above problems, and it is an object of the present invention to improve rinsing efficiency, improve rinsing performance, and shorten rinsing time.

[0009]

In the washing machine of the present invention, a pulsator rotatably arranged at the bottom of the washing / dehydrating tub, a motor for driving the pulsator, and water supply to the washing / dehydrating tub. Water supply means, a drainage pump for forcibly draining the washing liquid in the washing / dehydrating tub, a water level detecting means for detecting the water level in the washing / dehydrating tub, washing, rinsing,
A control means for sequentially controlling each step of dehydration, wherein the control means performs a water rinsing step of simultaneously performing water supply by the water supply means and drainage by the drainage pump while rotating the pulsator. Is.

As a result, the rinsing efficiency can be improved, the rinsing performance can be improved, and the rinsing time can be shortened.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention comprises a pulsator rotatably arranged at the bottom of a washing / dehydrating tub, a motor for driving the pulsator, and a washing / dehydrating tub. Water supply means for supplying water, a drainage pump for forcibly draining the washing liquid in the washing / dehydrating tank, a water level detecting means for detecting the water level in the washing / dehydrating tank, washing, rinsing,
A control means for sequentially controlling each step of dehydration, wherein the control means performs a water rinsing step of simultaneously performing water supply by the water supply means and drainage by the drainage pump while rotating the pulsator. Therefore, it is possible to rinse with water, and while supplying clean tap water from the upper part, by draining the washing liquid having a high detergent concentration from the lower part, it is possible to improve the rinsing efficiency, so that the rinsing performance can be improved, The rinsing time can be shortened.

Further, in the invention described in claim 2, in the invention described in claim 1, when the water level becomes higher than a predetermined water level by more than a predetermined value in the water rinsing process, the control means drains water by the drainage pump. Water supply by the water supply means is stopped until the water level falls below the predetermined water level, and when the water level becomes lower than a predetermined value below the predetermined water level, the water level is kept above the predetermined water level while the water supply by the water supply means is continued. Up to the above, the drainage pump is configured to stop drainage.If water is supplied and drained at the same time depending on the area in which the washing machine is used and the installation conditions, the water supply rate will be high or the water discharge rate will be high. However, by controlling the water supply means or the drainage pump as described above, the fluctuation of the water level can be suppressed to a certain width from the predetermined water level. Therefore, it is possible to prevent the washing liquid from overflowing because the water level is too high, the rinsing performance being deteriorated because the water level is too low, and the laundry being damaged.

According to a third aspect of the present invention, in the above-mentioned first aspect of the invention, the control means determines the water supply rate based on the rising speed of the water level at the time of water supply in the washing stroke or the rinsing stroke, and The drainage speed is determined based on the rate of decrease of the water level during drainage in the washing process, and when the water supply speed is faster than the drainage speed in the water rinsing process, water is drained by the drainage pump at regular intervals and water is supplied by the water supply means. When the water supply speed is slower than the drainage speed, the drainage by the drainage pump is stopped for a certain time while the water supply by the water supply means is continued every predetermined time. It is possible to determine the water supply rate and drainage rate that differ depending on the area where the machine is used and the installation conditions before starting the water rinsing. So that Flip to, or stop the water supply,
By stopping the drainage, the water level can be maintained closer to the predetermined water level.

In addition to the invention according to claim 1, the invention according to claim 4 is capable of changing the drainage speed at the time of forcibly draining the washing liquid in the washing / dehydrating tank in addition to the invention according to claim 1. When the water level becomes higher than a predetermined water level in the water rinsing stroke, the control means is provided with a variable drainage pump to increase the drainage speed of the variable drainage pump to a predetermined water level while continuing to supply water. When the water level becomes lower than the predetermined water level, the water supply by the water supply means is continued and the drainage speed of the variable drainage pump is slowed to raise the water level to the predetermined water level. When changing from the water level, the water level can be kept constant by changing the drainage speed of the variable drainage pump while keeping the water supply amount constant. That is, when the water level is higher than the predetermined water level, the drainage speed of the variable drainage pump is increased, and when the water level is lower than the predetermined water level, the drainage speed is reduced to keep the water level constant. it can.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same components as those in the conventional example are denoted by the same reference numerals, and description thereof is omitted.

(Embodiment 1) As shown in FIG. 2, the control device 15 controls the operations of the motor 4, the water supply valve (water supply means) 6, the drainage pump 9, etc., and as shown in FIG. The control means 16 sequentially controls each process of washing, rinsing, and dehydration based on the setting contents input by the operation display means 17, and the motor 4, the water supply via the power switching means 18. Valve 6 and drain pump 1
0 is sequentially controlled. The storage unit 19 stores data necessary for the sequential control by the control unit 16. The water level detection means 20 detects the water level of the washing / dehydrating tub 2 and inputs the output to the control means 16.

Further, the control means 16 drives the motor 4 to rotate the pulsator 3 while performing the water rinsing process in which the water supply by the water supply valve 6 and the drainage by the drainage pump 10 are simultaneously performed.

The operation of the above structure will be described with reference to FIG. 3. First, in order to store water in the washing / dehydrating tank 2 in the washing process, a small hole (not shown) provided from the water supply valve 6 to the lower surface of the water supply nozzle 7. Tap water is supplied into the detergent case 8 from the above, water is supplied from the water supply port 9 to the washing and dehydrating tub 2, and when the water level detecting means 20 detects a predetermined water level, the water supply is stopped and the pulsator 3 is driven by the motor 4. And start washing.
After the washing process, the rinsing process 1 starts and the drainage pump 1
0 is started to start drainage, and after the water level has dropped until the water level cannot be detected by the water level detection means 20, it is determined that drainage has ended after a certain period of time. After that, washing and dewatering tank 2
Is rotated at high speed to spin-dry the washing liquid contained in the laundry, and then the drainage pump 10 is stopped.

Next, when water is supplied from the water supply port 9 to the washing / dehydrating tank 2 and the water level detecting means 20 detects a predetermined water level,
The pulsator 3 is driven by the motor 4 to start rinsing. At this time, while the pulsator 3 is rotated, tap water is supplied from the water supply valve 6 to the washing / dehydrating tub 2 through the water supply port 9 and at the same time, the drainage pump 10 is used to drain the washing / dehydrating tub 2 into the washing / dehydrating tub 2. Drain the washing liquid out of the machine. This allows water rinsing.

(Embodiment 2) Control means 1 in FIG.
When the water level in the water rinsing process is higher than a predetermined level by 6 or more, water supply by the water supply valve 6 is stopped until the water level falls below the predetermined water level while the drainage pump 10 continues to drain water, and the water level is the predetermined level. When the water level becomes lower than a certain value below the water level, the water supply by the water supply valve 6 is continued, and the drainage by the drainage pump 10 is stopped until the water level reaches or exceeds the predetermined water level. 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. 4. When the water supply speed is higher than the drainage speed and the water level is higher than the predetermined water level H by a constant value h1 or more in the water rinsing process, the drainage pump 10 is operated. The water supply valve 6 is closed to stop the water supply while continuing the drainage by, and the water supply is restarted after the water level has dropped to the predetermined water level H or less. On the contrary, when the drainage speed is faster than the water supply rate and the water level is lower than the predetermined water level by a certain value h2 or more, the water supply by the water supply valve 6 is continued and the drainage by the drainage pump 10 is stopped to bring the water level to the predetermined water level. After the temperature has risen to the above level, restart drainage.

Thus, depending on the area where the washing machine is used and the installation conditions, when water is supplied and drained at the same time, the water level changes even if the water level is not constant due to a high water supply rate or a high drainage rate. Can be suppressed to a certain width from the predetermined water level H.

(Embodiment 3) Control means 1 in FIG.
When water is supplied in the washing process or the rinsing process, 6 measures the rising speed of the water level by the water level detecting means 20 to determine the water supply speed, and at the time of draining water in the washing process, the falling speed of the water level is measured by the water level detecting means 20. When the drainage speed is measured and the water supply rate is faster than the drainage speed in the water rinsing process, the water supply by the water supply valve 6 is stopped for a certain time while the drainage by the drainage pump 10 is continued every predetermined time. When the water supply speed is slower than the drainage speed, the drainage pump 1 continues to supply water by the water supply valve 6 every predetermined time.
The drainage by 0 is stopped for a certain period of 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. 5. When the water supply speed is faster than the drainage speed in the water pouring and rinsing process, the water supply valve 10 continues to drain water at regular intervals T1 and the water supply valve The water supply by 6 is stopped for a predetermined time t1. On the contrary, when the water supply speed is slower than the drainage speed, the drainage pump 10 stops the drainage for a predetermined time while maintaining the water supply by the water supply valve 6 at every constant time T2.

As a result, the water level H close to the predetermined water level can be maintained even if the water supply speed is high or the drainage speed is high.

The second embodiment may be combined with the third embodiment. That is, the water level is kept close to the predetermined water level by comparing the water supply speed and the drainage speed. However, when the water level is still far from the predetermined water level, when the water level becomes higher than the predetermined water level by a constant value h1, the drainage pump 10 The water supply valve 6 is closed while continuing to discharge water, and water supply is stopped, water supply is resumed after the water level has dropped below a predetermined water level, and conversely, when the water level is lower than the predetermined water level by a certain value h2 or more, Drainage pump 1 with continuous water supply by valve 6
The drainage by 0 may be stopped, and the drainage may be restarted after the water level rises above the predetermined water level.

(Embodiment 4) The drainage pump 10 shown in FIGS. 1 and 2 allows the drainage speed when the washing liquid in the washing / dehydrating tub 2 is forcibly drained to be freely changed, and the control means 16 is provided. When the water level becomes higher than the predetermined water level in the water rinsing process, the water supply valve 6 continues to supply water to increase the drainage speed of the drainage pump 10 to lower the water level to the predetermined water level, and the water level becomes lower than the predetermined water level. In this case, the drainage speed of the drainage pump 10 is slowed down while the water supply by the water supply valve 6 is continued to raise the water level to a predetermined water level. The other structure is the same as that of the first embodiment.

In the above structure, the drainage pump 10 can freely change the drainage speed when the washing liquid in the washing / dehydrating tub 2 is forcibly discharged, and in the water rinsing,
When the water level fluctuates from the predetermined water level H, the drainage pump 10
The water level can be kept constant by changing the drainage speed of. That is, when the water level becomes higher than the predetermined water level H, by increasing the drainage speed of the drainage pump 10,
When the water level is lowered to the predetermined water level H, and conversely, when the water level becomes lower than the predetermined water level H, the drainage speed of the drainage pump 10 is slowed to raise the water level to the predetermined water level H.

As a result, the water level can be kept constant even if the water supply speed is high or the drainage speed is high, depending on the region where the washing machine is used and the installation conditions.

[0030]

As described above, according to the first aspect of the present invention, a pulsator rotatably disposed at the bottom of the washing / dehydrating tub, and a motor for driving the pulsator,
Water supply means for supplying water to the washing / dehydrating tank, a drainage pump for forcibly draining the washing liquid in the washing / dehydrating tank, water level detecting means for detecting the water level of the washing / dehydrating tank, and washing / rinsing And a control means for sequentially controlling each process of dehydration, the control means performing a water rinsing process of simultaneously performing water supply by the water supply means and drainage by the drainage pump while rotating the pulsator. , While simultaneously supplying tap water from the water supply port to the washing and dehydrating tank by the water supply means and draining the washing liquid in the washing and dehydrating tank to the outside of the machine through the drain hose by the drainage pump, The pulsator can be rotated to perform rinsing with water, and rinse water with high detergent concentration is drained from the lower part while supplying clean tap water from the upper part, thus improving the rinsing efficiency. It is possible to improve the rinsing performance, it is possible to reduce the rinsing time.

Further, according to the invention described in claim 2, when the water level becomes higher than the predetermined water level by a predetermined value or more in the water rinsing process, the control means keeps the drainage by the drainage pump and keeps the water level at the predetermined water level. Stop water supply by the water supply means until the water level becomes below, and when the water level becomes lower than a predetermined value below a certain level, stop the drainage by the drainage pump until the water level is above the predetermined water level while continuing the water supply by the water supply means. Therefore, depending on the area where the washing machine is used and the installation conditions, when water is supplied and drained at the same time, the water level will not be constant because the water supply speed will be high and the water discharge speed will be high. By controlling the water supply means or the drainage pump, the water level fluctuation can be suppressed from the predetermined water level to a certain width. Therefore, it is possible to prevent the washing liquid from overflowing because the water level is too high, the rinsing performance being deteriorated because the water level is too low, and the laundry being damaged.

According to the third aspect of the present invention, the control means determines the water supply rate based on the rising speed of the water level during the water supply during the washing stroke or the rinsing stroke, and the water level during drainage during the washing stroke. The drainage speed is determined by the descending speed of, and in the water rinsing process, when the water supply speed is faster than the drainage speed, the water supply by the water supply means is stopped for a certain time while the water discharge by the drainage pump is continued at predetermined time intervals. When the water supply speed is slower than the drainage speed, the water supply by the water supply means is continued for each predetermined time, and the drainage by the drainage pump is stopped for a certain period of time.
The water supply speed and the water discharge speed can be judged before the start of water rinsing. Therefore, by stopping the water supply or stopping the water discharge so that the water supply amount and the water discharge amount are the same in the predetermined time, it is closer to the predetermined water level. The water level can be maintained.

Further, according to the invention described in claim 4, the control means is provided with a variable drainage pump capable of freely changing the drainage speed at the time of forcibly draining the washing liquid in the washing / dehydrating tub. When the water level becomes higher than the predetermined water level in the water rinsing process, the water level is lowered to the predetermined water level by increasing the drainage speed of the variable drainage pump while continuing the water supply by the water supply means, and the water level becomes lower than the predetermined water level. At this time, the water supply rate of the variable drainage pump is lowered to raise the water level to a predetermined water level while the water supply by the water supply means is continued, so that when the water level fluctuates from the predetermined water level, the water supply amount is constant. In addition, the water level can be kept constant by changing the drainage speed of the variable drainage pump. That is, when the water level is higher than the predetermined water level, the drainage speed of the variable drainage pump is increased, and when the water level is lower than the predetermined water level, the drainage speed is decreased to keep the water level constant. it can.

[Brief description of the drawings]

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

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

FIG. 3 is an operation time chart of main parts of the washing machine.

FIG. 4 is a main part operation time chart of the washing machine according to the second embodiment of the present invention.

FIG. 5 is a main part operation time chart of the washing machine according to the third embodiment of the present invention.

FIG. 6 is a vertical sectional view of a conventional washing machine.

FIG. 7 is an operation time chart of main parts of the washing machine.

[Explanation of symbols]

 2 Washing / dehydrating tank 3 Pulsator 4 Motor 6 Water supply valve (water supply means) 10 Drain pump 16 Control means 20 Water level detection means

Claims (4)

[Claims] 1. A pulsator rotatably arranged at the bottom of a washing / dehydrating tub, and a motor for driving the pulsator,
Water supply means for supplying water to the washing / dehydrating tank, a drainage pump for forcibly draining the washing liquid in the washing / dehydrating tank, water level detecting means for detecting the water level of the washing / dehydrating tank, and washing / rinsing And a control means for sequentially controlling each process of dehydration, the control means performing a water rinsing process of simultaneously performing water supply by the water supply means and drainage by the drainage pump while rotating the pulsator. Washing machine. 2. The control means, in the water rinsing stroke,
When the water level is higher than a predetermined level by a certain value or more, the water supply by the water supply means is stopped until the water level falls below the predetermined level while the drainage pump continues draining, and the water level becomes lower than the predetermined level below the predetermined level. The washing machine according to claim 1, wherein the drainage by the drainage pump is stopped until the water level becomes equal to or higher than a predetermined water level while the water supply by the water supply means is continued. 3. The control means determines the water supply speed by the rising speed of the water level during the water supply in the washing stroke or the rinsing stroke, and determines the drainage speed by the falling speed of the water level during drainage in the washing stroke, In the rinsing process, when the water supply speed is faster than the drainage speed, the water supply by the water supply means is stopped for a certain period of time while the drainage pump continues to drain water, and when the water supply speed is slower than the drainage speed, The washing machine according to claim 1, wherein the drainage by the drainage pump is stopped for a certain period of time while the water supply by the water supply means is continued every predetermined time. 4. A variable drainage pump, which can freely change the drainage speed when forcibly draining the washing liquid in the washing / dehydrating tub, wherein the control means has a water level higher than a predetermined water level in the water rinsing process. When the water level becomes low, the water level of the variable drainage pump is increased and the water level is lowered to a predetermined water level while water supply by the water supply means is continued.When the water level becomes lower than the predetermined water level, the water supply by the water supply means is continued. The washing machine according to claim 1, wherein the drainage speed of the variable drainage pump is kept as it is to raise the water level to a predetermined water level.