JPH0928976A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To utilize used bathtub water for a final rinsing also in order to save water, and keep a cleanness. SOLUTION: When used bathtub water remains at the time of a final rinsing process, a rinsing with accumulated water or a rinsing with jetted water for which the bathtub water is used, is performed, and after that, a final finish rinsing (clean shower rinsing) is added. In the clean shower rinsing, a water supply solenoid valve 27 is opened, and while a water supply from a tap water supply passage 26 is being performed, a washing tank 13 is slowly rotated. As a result, even if lint being mixed in the bathtub water adheres to laundry, the lint is washed away, and a cleanness is kept.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine, and more particularly to a washing machine provided with a water supply channel and a pump water supply channel.

[0002]

2. Description of the Related Art In a washing machine equipped with a water absorption pump, a water supply valve is provided in a water supply channel, and a water absorption pump is provided in a pump water supply channel. Water is supplied. Normally, the pump water supply channel is for effectively utilizing the remaining hot water in the bath for washing,
An operation key of this type of washing machine is provided with an input key for selecting whether or not to use a pump water supply channel, that is, bath water for washing.

By the way, in a washing machine,
A series of washing steps is performed in the order of the rinsing step and the dehydrating step. Among them, the rinsing step is usually repeated a plurality of times, for example, twice. The conventional rinsing method is so-called "water-pouring rinsing" in which rinsing is performed while supplying water to the washing tub.
There was a so-called "reserve rinsing" in which a predetermined amount of water was stored in the washing tub.

Recently, however, a lot of products in which the first rinse step is so-called "dehydrated rinse" to save water are commercialized. In this dehydration rinse, water is supplied to the inside of the washing tub so that the entire laundry is soaked in water, and then the washing tub (dehydration tub) is rotated at high speed for dehydration. Rinsing is done. In the dehydration rinsing, it is sufficient to supply water so that the water permeates into the laundry, and therefore, considerable water saving can be achieved as compared with the rinsing and rinsing with water.

As described above, the dehydration rinsing has a great effect on saving water, but when the remaining hot water in the bath can be used through the pump water supply passage, there is no need to save water, and the cleaning performance and rinsing performance are important. Since rinsing performance is generally higher than dehydration rinsing, it is desirable to perform rinsing or pouring rinsing unless it is necessary to reduce the amount of water used.

[0006]

However, the remaining hot water in the bath is not hygienic because dust such as dirt and soap dust is mixed. These dusts can be removed to some extent by a dust removal filter at the suction inlet of the pump water supply channel,
Not perfect. For this reason, the use of bath water as the final rinse water before dehydration has a resistance to the user, and it is common not to use the bath water during the final rinse step.

The present invention has been made to solve the above problems, and its purpose is to effectively use bath water for washing in order to save water and to perform hygienic rinsing. To provide a machine.

[0008]

Means for Solving the Problems, Embodiments and Effects A first washing machine according to the present invention made to solve the above problems is provided with a tap water supply passage and a pump water supply passage. The washing process, the washing process, and the rinsing process of one or more times are provided with the water supply control device for supplying water to the washing tub by controlling the opening / closing of the water supply valve provided in the passage and the operation of the water absorption pump provided in the pump water supply passage. And a washing machine that executes the dehydration step, a) an input unit that is operated to select whether or not to use the pump water supply channel in the washing step and / or one or more rinsing steps, and b) the input means. When the use of the pump water channel is selected for the final rinsing step in one or more rinsing steps by the operation, the final rinsing step executes either one of the rinsing and the water rinsing, and the final rinsing step is performed. The water supply valve open After the completion is characterized by comprising a driving control means for performing add the final finishing rinsing step of rotating the washing tub performs a water supply from the water Water passage.

In the first washing machine, the operation control means first determines whether or not the use of the pump water supply channel is selected for the final rinsing step in one or more rinsing steps. When the use of the pump water supply channel is selected, as the final rinsing step, the water absorption pump is operated to supply water up to the prescribed water level in the washing tub and then rinse to perform rinsing or continue operation of the water absorption pump. Do one of the water rinses. Then, after the final rinsing step and before the dehydration step, a final finishing rinsing step is specially added and executed. In the final rinsing step, the water supply valve is opened to supply water from the tap water supply channel to the washing tub and the washing tub is rotated at a low speed. As a result, the dust attached to the laundry is washed away.

Therefore, according to the first washing machine of the present invention,
Even if bath water is used in the final rinsing step, dust adhering to the laundry is washed away in the final rinsing step, so that clean rinsing can be performed. Further, since the amount of tap water used in the final finishing rinsing step can be small, the cost increase can be suppressed.

The second washing machine according to the present invention is the above-mentioned first washing machine which executes the rinsing process two or more times, and when the operation control means selects the use of the pump water supply channel for each rinsing process. However, when the water supply from the pump water supply channel is stopped during the water supply in the rinsing process before the final rinsing process, the remaining water supply in the rinsing process and the water supply in the subsequent rinsing process are performed from the tap water supply channel and the final rinsing process is performed. It is characterized by not adding a finishing rinsing step.

That is, in the rinsing process other than the final rinsing process, the operation control means abnormally supplies the pump water before the predetermined amount of water is accumulated in the washing tub in the case of rinsing and in the middle of rinsing in the case of water rinsing. When is detected, the water supply valve is opened to shift to tap water supply. At this time,
The final rinsing step will not be added because all water supply for the final rinsing step will be from the water supply channel.

Therefore, according to the second washing machine, even when the use of bath water is selected for the final rinsing step, the bath water is exhausted and the final rinsing step is executed using tap water. Occasionally, unnecessary finishing rinsing steps are not performed, avoiding increased water usage and increased rinsing time.

A third washing machine according to the present invention is the same as the first washing machine, wherein the operation control means is the case where the use of the pump water supply channel is selected in the final rinsing step, and the water supply in the final rinsing step is performed. When the water supply from the pump water supply passage is stopped, the remaining water supply of the final rinsing step is performed from the tap water supply path and the final rinsing step is additionally performed.

That is, in the final rinsing step, the operation control means, when a predetermined amount of water is accumulated in the washing tub in the case of rinsing and when an abnormality of pump water supply is detected during rinsing in the case of water rinsing, , Open the water supply valve and switch to tap water supply. At this time, the rinsing water in the final rinsing step is a mixture of water from the pump water supply channel and water from the tap water supply channel, and it is highly possible that dust is mixed in, so an additional final rinsing step is performed. Be done.

Therefore, according to the third washing machine, tap water is replenished for the shortage even if the bath water is exhausted during the final rinsing step, and the final finishing rinsing step is executed after the final rinsing. Therefore, a clean rinse can be performed.

A fourth washing machine according to the present invention is the above-mentioned first washing machine which executes a rinsing step two or more times, and when the operation control means selects the use of the pump water supply channel for the washing step. Therefore, when the water supply from the pump water supply channel is stopped during the water supply in the washing process, the remaining water supply in the washing process is performed from the tap water supply channel, and water is added to the laundry as a rinsing process before the final rinsing process. The feature is that water is supplied from the water supply channel to the extent that the water is spread, and dewatering rinsing is performed by rotating the washing tub at a high speed, and a final finishing rinsing step is not added.

That is, when pump water supply cannot be performed during the water supply in the washing process, tap water is used for the remaining water supply in the washing process and the water supply in the rinsing process. Therefore, the problem of sanitation does not occur, but the problem of the amount of tap water used occurs. For this reason, the operation control means performs dewatering rinsing with a small amount of water as a rinsing process other than the final rinsing process instead of adding the final rinsing process. In the dewatering rinse, the operation control means first opens the water supply valve to supply water from the tap water supply channel and slowly rotate the washing tub so that the entire laundry is impregnated with water. After that, the water supply valve is closed and the washing tub is rotated at high speed.
As a result, the detergent that has soaked into the laundry is removed together with the water.

Therefore, according to the fourth washing machine, when the bath water is exhausted during the washing process, dehydration rinsing is performed in the rinsing process before the final rinsing process.
The amount of water used can be reduced.

A fifth washing machine according to the present invention is the above-mentioned first and third washing machines, further comprising flow rate detecting means of the water supply channel, and the operation control means is based on the detection result of the flow rate detecting means. It is characterized by determining the rinsing time in the final finishing rinsing step.

The flow rate of water from the water supply channel varies depending on the environment and conditions of use, and if the flow rate is low, the ability to wash away dust adhering to the laundry in the final rinsing step becomes weak. Therefore, prior to the final rinsing step, the flow rate detecting means checks the flow rate of water in the water supply channel, and the operation control means should increase the rinsing time when the flow rate is low and shorten the rinsing time when the flow rate is high. It controls the rotation of the water supply valve and the washing tub.

Therefore, according to the fifth washing machine, useless water can be avoided in the final rinsing step, and clean and efficient rinsing can be performed.

The flow rate detecting means comprises a water level detecting means for detecting the water level in the washing tub and a flow rate calculating means for calculating the flow rate from the time required for raising the predetermined water level, and the operation control means is the final rinse. When water is supplied during the process, the operation of the water absorption pump is temporarily stopped, the water supply valve is opened, and water is supplied from the tap water supply channel instead of water from the pump water supply channel.At this time, the water level in the washing tub is detected by the water level detection means. It is preferable to determine the flow rate of the water supply channel from the time required to detect and increase the predetermined water level.

According to this, since the flow rate of the water supply channel can be calculated without adding a device such as a flow meter, clean and efficient rinsing can be performed with almost no increase in cost.

[0025]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view of a washing machine according to the present invention, FIG. 2 is a plan view showing an input key arrangement of an operating section of the washing machine, FIG. FIG. 5 is a flowchart showing the basic flow of the washing process, FIGS. 6 and 7 are flowcharts showing the processing operation of the washing machine according to the present invention, and FIG. 8 is the final rinsing process ( It is a control time chart of a clean shower.

First, the construction of the entire washing machine will be described with reference to FIG. An operation unit 11 having an input key is provided at the upper rear of the machine casing 10. An outer tub 12 is arranged inside the machine frame 10, and a washing tub 13 which also serves as a dehydration tub having a large number of dehydration holes on its peripheral wall is installed inside the outer tub 12. The bottom of the washing tub 13 has a rotor 14 for stirring the laundry.
Is arranged, the rotation of the motor 15 is controlled by the motor pulley 16,
It is transmitted to the washing tub 13 and the rotary vanes 14 via the belt 17, the main pulley 18, and the power switching mechanism 19. The power switching mechanism 19 rotates only the rotor 14 during washing,
At the time of dehydration, mechanical switching is performed so that both the washing tub 13 and the rotary vanes 14 are rotated.

A drainage port 20 is provided at the bottom of the outer tub 12, and drainage is performed through a drainage pipe 21 opened and closed by a drainage electromagnetic valve 22. An air trap 23 is provided at one corner of the bottom of the outer tub 12, and is connected to a water level sensor 25 via a pressure hose 24. By detecting the pressure of air according to the water level with the water level sensor 25, The water level in the tank 12 is detected. Water supplied from the tap water supply passage 26 is poured into the washing tub 13 via the water supply solenoid valve 27, and water from the pump water supply passage 28 is sucked up by the water suction pump 29 and poured into the washing tub 13.

The water levels L _{1 to} L ₄ indicated by broken lines in the washing tub 13 in the figure are the four preset (or rinse) water level modes “minimum”, “low”, “medium” and "High"
Corresponding to each. Further, the water level L ₀ set to a position lower than the water level L ₁ is a check water level (hereinafter referred to as “reset water level”) for promptly detecting an abnormal state of water supply.

Next, the arrangement of input keys in the operation unit 11 of FIG. 1 will be described with reference to FIG. The operation unit 11 includes an input unit 40 including a plurality of input keys, and a display unit 41 for displaying a mode or numerical value selected by operating the input keys. Hereinafter, the function of each input key of the input unit 40 will be described in order.

The water level selection key 42 controls the amount of water in the washing process and the rinsing process to be "minimum", "low" depending on the amount of laundry.
It is an input key for the operator to manually select from four modes of "medium" and "high", and the selected water level mode portion of the display unit 41 is lit. The water levels in the washing tub 13 corresponding to these four modes are shown at the positions of L _{1 to} L ₄ in FIG. As the water level during the washing process and the rinsing process, usually, an appropriate water level is automatically selected according to the amount of laundry detected by the load sensor, and the selected water level mode is displayed.

The bath water use key 43 is used for the pump water supply passage 28.
This is an input key for the operator to select which of the washing process, the first rinsing process, and the second rinsing process the bath water supplied through is used. As shown in FIG. 3, each time the bath water use key 43 is pressed, the process in which the bath water is used changes, and the portion in the display section 41 corresponding to the process changes.

The course selection key 44 is an input key for selecting one from a plurality of washing courses in which the washing time, the water flow, etc. are determined in advance according to the type of laundry and the degree of dirt. , The display unit 41 corresponding to the selected course
The inside part is designed to light up.

The favorite course selection key 45 is an input key for the operator to freely set the time for washing and dehydrating, the number of times of rinsing, etc., and the value corresponding to the input operation is displayed on the display section 41. To be done. It is also possible to temporarily store these numerical values and select "own flow" with the course selection key 44 to execute a series of washing steps as memorized.

In addition, a reservation key 46 is an input key for reserving the washing start time, and a powder soap dissolving key 47 is used when powder soap that is difficult to dissolve in water is used, before the laundry is put into the washing tub 13. This is an input key operated in advance when it is desired to dissolve the powdered soap in the washing tub 13 by a strong water flow.

Next, the electrical construction of the washing machine equipped with the water supply control device according to the present invention will be described with reference to FIG. A key input signal is input from the input unit 40 of the operation unit 11 and a water level detection signal is input from the water level sensor 25 to the control unit 30 mainly including a microcomputer. The control unit 30 has a memory that stores an operation program, receives a key input from the input unit 40, and drives the motor 15 according to the corresponding operation program, the motor drive unit 31, the water supply solenoid valve 27, and the water absorption pump 29. And controlling the operation or operation of the drainage electromagnetic valve 22 and the like. In addition, the above-described display is performed on the display unit 41 according to the key input signal.

The basic washing process flow of the washing machine having the above construction is as shown in FIG. According to the operation program, the control unit 30 first executes the washing process, then sequentially executes the first rinsing process and the second rinsing process, and finally executes the dehydration process. As described above, by operating the favorite course selection key 45 by the operator, it is possible to execute only a part of the washing process.

A series of processing operations of the washing machine according to the present invention will be described below with reference to the flowcharts of FIGS. 6 and 7.

When the start key 48 is operated after the washing water level, the use of bath water, etc. are selected by operating the input keys,
The control unit 30 starts the operation according to the operation program. First, it is determined whether or not execution of the washing process is set (step S10). That is, if the set washing course includes a washing step, step S11
If the washing step is not included, step S15
Proceed to.

When the washing process is set, the control unit 3
0 executes the washing process. First, the water suction pump 29 is started, and the supply of bath water via the pump water supply passage 28 is started (step S11). Based on the detection signal of the water level sensor 25, when the water level in the washing tub 13 reaches the wash water level selected by the operator or automatically set according to the amount of laundry (step S12), the water suction pump 29 Is stopped (step 14). That is, the bath water is supplied until the water level L _{1 to} L ₄ corresponding to any one of the “very low”, “low”, “medium”, and “high” water levels is reached. The detergent may be automatically added in advance before water supply, or may be added by the operator himself.

Until the water level in the washing tub 13 reaches the wash water level, it is repeatedly determined whether or not the water level rises to determine whether or not there is an abnormality in the water supply to the pump (step S1).
3). At this time, it is determined that the water supply is normal when the water level rises by a certain amount or more by the detection signal of the water level sensor 25, for example, every 5 seconds. When the water supply is normal, the process returns to step S12, and it is determined again whether the water level in the washing tub 13 has reached the wash water level. Therefore, as long as the pump water supply abnormality such as running out of bath water does not occur, the pump water supply is continued by the processing of steps S12 to S14 until the water level in the washing tub 13 reaches the wash water level.

When the water level in the washing tub 13 reaches the wash water level, washing is executed (step S16). At this time, the control unit 30 controls the motor drive unit 31 to rotate only the rotary vanes 14 at a low speed at a predetermined rotation speed, whereby washing is performed. After washing for a predetermined time, the drainage electromagnetic valve 22 is opened and the dirty detergent water in the washing tub 13 is drained from the drainage port 20 (step S17).

Subsequently, an intermediate dehydration is carried out in order to efficiently perform rinsing (step S18). In the intermediate dehydration, the control unit 30 controls the motor drive unit 31 to rotate both the washing tub 13 and the rotary vanes 14 at high speed, whereby the detergent water soaked in the laundry is splashed. At this time,
The drainage solenoid valve 22 is opened.

When the washing process is not set in step S10, based on the detection signal of the water level sensor 25,
It is determined whether the water level in the washing tub 13 is equal to or higher than the reset water level L ₀ (step S15). Normally, all the water in the washing tub 13 has been drained at the start of washing, but when the operator manually starts washing from a state where the previously used water remains, May be accumulated in the washing tub 13, so check this.

The water level is reset in step S15.
_In the case of ₀ or more, the process proceeds to step S17, the water in the washing tub 13 is discharged, and then the intermediate dehydration is executed. When the water level is lower than the reset water level L ₀ , the process proceeds to step S18, and the intermediate dehydration is executed as it is.

When it is determined in step S13 that the water level has not risen, it can be determined that the pump water supply cannot be performed because the bath water is exhausted or the filter at the suction port is clogged. In this case, the operation of the water suction pump 29 is stopped, the water supply solenoid valve 27 is opened, and the water supply from the water supply channel 26 is started (step S1).
9). Based on the detection signal of the water level sensor 25, tap water is supplied up to the wash water level, and then the water supply solenoid valve 27 is closed.
Further, step S20 similar to steps S16 to S18.
By the processing of to S22, washing, drainage and intermediate dehydration are executed.

After the completion of the intermediate dehydration in step S18 or S22, it is determined whether or not the next step is the final rinsing step (step S29 or S23). That is, except for the washing course in which only one rinse is executed, the next process is not the final rinse when the determination in step S29 or S23 is performed for the first time.

If the next process is the final rinsing process in step S23, the process proceeds to step S26, the water supply solenoid valve 27 is opened, and water supply from the water supply channel 26 is started. Then, based on the detection signal of the water level sensor 25, when the tap water is supplied up to the rinse water level, the water supply solenoid valve 27 is closed.

If the next process is not the final rinsing process in step S23, that is, if the first and second rinsing processes are performed twice, the process proceeds to step S24, and dehydration rinsing is first executed as the first rinsing process. It In the dehydration rinsing, the drainage electromagnetic valve 22 is maintained in the open state for discharging the detergent water at the end of the washing process. The water supply solenoid valve 27 is opened, and tap water is supplied to the washing tub 13.
Is supplied in. At this time, the control unit 30 controls the motor driving unit 31 to slowly rotate both the washing tub (dehydration tub) 13 and the rotary vanes 14. Therefore, the water is supplied while the laundry tub 13 is slowly rotating, so that the laundry tub 1
The water in the laundry in 3 splashes almost evenly, and the entire laundry is soaked with water. The amount of water supplied at this time is, for example, about several liters to 10 liters, which is significantly smaller than the amount of water required for rinsing and pouring.

When water is supplied for a predetermined time so that the entire laundry is soaked with water, the water supply solenoid valve 27 is closed. After that, the washing tub 13 is rotated at a high speed for a predetermined fixed time to perform dehydration. By this dehydration, the detergent water soaked in the laundry is removed together with the water, and the drain port 20
Emitted from. After the completion of the dehydration rinsing, the intermediate dehydration is performed in S25 similar to step S22.

As described above, the dewatering rinse is performed by the washing tub 13
It consists of a series of flow of water supply while slowly rotating and dehydration by high speed rotation, but as the first rinsing step,
It is also possible to repeat this series of steps as one cycle by repeating a plurality of cycles, for example, two cycles.

After completion of the dehydration rinsing step, that is, the first rinsing step, or when only one rinsing step is set, the control section 30 executes the second rinsing step.
In this second rinsing step, pool rinsing is executed. Second
In the rinsing process, first, the water supply solenoid valve 27 is opened with the drainage solenoid valve 22 closed to start tap water supply,
When water is supplied until the water level in the washing tub 13 reaches the rinse water level, the water supply solenoid valve 27 is closed (step S).
26). At this time, a finishing agent (clothing softening agent) may be added to the rinse water.

When a predetermined amount of water has accumulated in the washing tub 13, the control unit 30 controls the motor drive unit 31 to rotate the rotor 1
Rotate only 4 at low speed (Do not rotate washing tub 13)
(Step S27). The rinsing time at this time is a value previously incorporated in the operation program in the control unit 30,
The standard time is about 2 minutes. Then, after the rotation of the rinse is completed, the drainage electromagnetic valve 22 is opened, and all the rinse water is discharged from the drainage port 20 (step S28).

On the other hand, if the next process is not the final rinsing process in step S29, that is, if the first and second rinsing processes are performed twice, the process proceeds to step S43.
Rinsing is performed because bath water is used as the first rinsing step. Therefore, in the rinsing process, step S43
By the processing of S44 and S44, the bath water is supplied until the rinse water level is reached. If an abnormality occurs in the bath water supply during the water supply, the process proceeds to step S46 and the tap water supply is performed. Therefore, in this case, the rinse water in the first rinse step is a mixture of bath water and tap water.

After that, the rinsing rinse is executed (step S47), and the rinsing water is discharged after the completion of the rinsing rinse (step S48). Then, steps S25 to S28.
The intermediate dehydration and the second rinsing step (reserve rinsing) are performed by the same processing of steps S49 to S52.

If there is no abnormality in the bath water supply during the water supply in the first rinsing step in step S44, the process proceeds to step S45, where the bath water is used for rinsing and then the process returns to step 17. Drainage as described above (step S17),
Intermediate dehydration (step S18) is executed, and step S2
At 9, it is again determined whether the next process is the final rinse. In the case of the present embodiment, when the determination in step S29 becomes the second time, the next process is always the final rinse and the process proceeds to step S30.

In steps S30 and S31, step S4
By the same process as 3 and S44, the bath water is supplied until the rinse water level is reached. When an abnormality occurs in the pump water supply during the water supply, the process proceeds to step S40, and the water supply is performed. The flow rate of tap water is measured after the water supply solenoid valve 27 is opened to start the water supply from the water supply channel 26 and before the end of the water supply (step S41). As will be described in detail later, in the flow rate measurement, the flow rate is determined based on the detection signal of the water level sensor 25 from the time required for the rise of a predetermined amount of water level. When the water level in the washing tub 13 reaches a predetermined rinsing water level, the water supply electromagnetic valve 27 is closed and the rinsing is executed (step S35).

If the bath water supply is normal in step S31, the flow proceeds to step S32, and the flow rate of tap water is measured. At this time, the pump water supply is being performed, but the operation of the water absorption pump 29 is once stopped, the water supply solenoid valve 27 is opened, and the water supply from the tap water supply passage 26 is started. Then, as in step S41, the water level sensor 25
Based on the detection signal of 1, the flow rate is determined based on the time required to raise the water level by a predetermined amount. When the flow rate measurement is completed, the water supply solenoid valve 27 is closed, the water suction pump 29 is activated again, and the bath water supply is restarted (step S33).
That is, the tap water is temporarily supplied only to measure the flow rate of the tap water supply passage 26. After that, if an abnormality occurs in the bath water supply before the water reaches the rinse water level (step S34), the process proceeds to step S42, and the tap water supply is performed.

After the bath water or the mixed water of the bath water and the tap water reaches the predetermined rinsing water level, pool rinsing is executed as the second rinsing step (step S35). After the end of the rinsing, the drainage electromagnetic valve 22 is opened to discharge the rinsing water (step S36), and the intermediate dehydration is further executed (step S37). In this case, since the bath water is used in the second rinsing step (final rinsing step), the final rinsing (clean shower rinsing) is performed as the third rinsing step.
Is executed (step S38).

In the clean shower rinsing, the control unit 30
Opens the water supply solenoid valve 27 to supply water from the water supply channel 26. At this time, the drainage electromagnetic valve 22 is opened. Simultaneously with the water supply, the control unit 30 controls the motor driving unit 31 so that the washing tub 13 and the rotary vanes 14 rotate together slowly. FIG. 8 shows an example of the control time chart at this time. At the same time as the water supply solenoid valve 27 is opened, the motor 15
The motor drive unit 31 is controlled so that the energization / de-energization of is repeated for 1.5 seconds-8 seconds. Therefore, as in the first half of the dehydration rinsing operation, water is supplied from above while the washing tub 13 slowly rotates. As a result, the entire laundry in the washing tub 13 is flooded with water, and the dust adhering to the laundry is washed out and discharged together with the water.

The operating time of the clean shower rinsing is set according to the flow rate of tap water measured in step S32 or S41. That is, when the flow rate of tap water is high, the operation time is short because the force that pushes away the dust attached to the laundry is strong. Conversely, when the flow rate of tap water is low, the dust attached to the laundry is removed. The driving force is weak, so the operation time is long.

Specifically, for example, the operating time is determined as follows. In flow measurement tap water, from the time when the water level in the washing tub 13 reaches a 20mm lower than the reset water level L ₀ until it reaches the reset water level L _0, i.e., the water level is measured the time T required for the rising 20mm It When the time T is less than 16 seconds, the flow rate L is estimated to be more than 15 liters / minute, and the clean shower operation time is 3
It is set to 6 seconds. When the time T is 16 seconds or more and less than 24 seconds, the flow rate L is estimated to be 15 liters / minute or less and more than 10 liters / minute, and the clean shower operation time is set to 54 seconds. When the time T is 24 seconds or more, the flow rate L is 1
It is estimated to be 0 liters / minute or less, and the clean shower operation time is set to 108 seconds.

After the clean shower rinsing is executed during the operation time set in this way, the control unit 30 finally executes the dehydration process (step S39). Also, when a rinsing is performed, the dehydration step is also executed at the end. In the dehydration process, the washing tub 13 is rotated at high speed together with the rotary vanes 14 while the drainage electromagnetic valve 22 is open. As a result, the rinsing water that has permeated the laundry is removed, the dehydration is completed, and the entire washing process is completed.

In the above embodiment, water rinsing may be performed instead of pool rinsing. In the case of water rinsing, the water absorption pump 29 is continuously operated even after a predetermined amount of water is accumulated in the washing tub 13 or the water supply solenoid valve 27 is kept open to keep the water supply and to rotate the rotor blades. Rotate 14 to perform rinse. At this time, water overflows from the overflow port in the outer tub 12 and is drained.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a washing machine to which an embodiment of the present invention is applied.

FIG. 2 is a plan view showing the arrangement of input keys on the operation unit of the washing machine.

FIG. 3 is an explanatory view of a change in a water supply mode by operating a bath water use key.

FIG. 4 is a block diagram of an electric system of the washing machine.

FIG. 5 is a flowchart showing a basic flow of a washing process.

FIG. 6 is a flowchart showing a processing operation in the embodiment of the present invention.

FIG. 7 is a flowchart showing a processing operation in the embodiment of the present invention.

FIG. 8 is a time chart for explaining the operation of the clean shower rinse in the embodiment of the present invention.

[Explanation of symbols]

 11 ... Operation part 12 ... Outer tub 13 ... Washing tub 25 ... Water level sensor 26 ... Water supply channel 27 ... Water supply solenoid valve 28 ... Pump water supply channel 29 ... Water absorption pump 30 ... Control section

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yuji Eifuku 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd.

Claims (6)

[Claims] 1. A washing tub is provided by providing a water supply channel and a pump water supply channel, and controlling the opening and closing of a water supply valve provided in the water supply channel and the operation of a water absorption pump provided in the pump water channel, respectively. In a washing machine equipped with a water supply control device for performing water supply of 1) and performing a washing step, one or more rinsing steps and a dehydrating step, a) use of the pump water supply channel in the washing step and / or one or more rinsing steps. Input means operated to select the presence / absence, and b) when the use of the pump water channel is selected for the final rinsing step in one or more rinsing steps by operating the input means, the final rinsing step is rinsing and rinsing. Alternatively, one of water rinsing is performed, and after the final rinsing step is finished, the water supply valve is opened to supply water from the tap water supply channel and the washing tub is rotated. A washing machine comprising: an operation control unit that additionally executes a rinsing process. 2. A washing machine that executes a rinsing step two or more times, wherein the operation control means is provided for a rinsing step prior to a final rinsing step when the use of a pump water supply channel is selected for each rinsing step. When the water supply from the pump water supply channel is stopped during the water supply, the remaining water supply of the rinsing process and the water supply of the subsequent rinsing process are performed from the tap water supply channel and the final rinsing process is not added. The washing machine according to Item 1. 3. The operation control means, when the use of the pump water supply channel is selected in the final rinsing step, and when the water supply from the pump water channel is stopped during the water supply in the final rinsing step, The washing machine according to claim 1, wherein the remaining water supply in the final rinsing step is performed from a water supply channel and a final rinsing step is additionally performed. 4. A washing machine that executes a rinsing step two or more times, wherein the operation control means is a pump water channel when the use of the pump water channel is selected for the washing step, When water is no longer supplied from the tap water supply channel, the remaining water supply in the washing step is performed from the tap water supply channel, and water is supplied from the tap water channel to the extent that water is spread over the laundry as a rinsing step prior to the final rinsing step. The washing machine according to claim 1, wherein a dewatering rinse is performed by rotating the washing tub at a high speed, and a final rinsing step is not added. 5. The flow control system further comprises flow rate detecting means for the water supply channel, and the operation control means determines the rinsing time in the final finishing rinsing step based on the detection result of the flow rate detecting means. And the washing machine described in 3. 6. The flow rate detecting means comprises a water level detecting means for detecting a water level in a washing tub and a flow rate calculating means for calculating a flow rate from a time required for raising a predetermined water level, and the operation control means is a final rinse. At the time of water supply in the process, the operation of the water absorption pump is temporarily stopped, the water supply valve is opened, and water is supplied from the tap water supply path instead of water supply from the pump water supply path.At this time, the water level in the washing tub is adjusted. The washing machine according to claim 5, wherein the flow rate of the water supply channel is determined from the time required for the predetermined water level to rise by being detected by the water level detection means.