JP2018130238A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine capable of executing washing with excellent finishing while saving washing time, detergent, water, etc. for laundry having different degrees of soiling.SOLUTION: The washing machine comprises: a laundry weight detection part 26 for detecting an amount of laundry loaded into a rotary drum 3; a soil detection part 13 for detecting turbidity of washing water; a detergent automatic feeding device 15; a transmission part 30 for transmitting information on a washing operation state etc. to a user; and a control part 18. The control part 18 terminates a pre-washing by determining a change in turbidity based on information on turbidity detected by the soil detection part 13 during the pre-washing in a first washing process, then terminates a main washing by determining a change in turbidity based on information on turbidity detected by the soil detection part 13 during the main washing, and transmits the termination of the first washing process to a user and temporarily stops the washing operation, and starts a second washing process upon receiving a signal that a predetermined button has been pressed after laundry is additionally loaded by the user.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a washing machine that puts laundry into a washing tub and performs washing by sequentially controlling each process such as washing and rinsing.

  Conventionally, in a washing machine, as shown in Patent Document 1, a user selects whether the laundry is “severe dirt”, “standard”, or “slight dirt”, and the initial value is determined according to the result and the amount of laundry. The amount of detergent input is determined. Then, during the subsequent washing process, the soil sensor determines whether the laundry has been soiled, and if it is determined that the laundry is insufficient, based on the user's selection result of “severe soiling”, “standard” or “lightly soiling”. An additional amount of detergent was determined.

JP-A 61-172593

  However, in the conventional washing machine disclosed in Patent Document 1, the determination of the degree of dirt is left to the user. Therefore, individual differences greatly affect the determination and the selection of the degree of contamination based on the determination. Some of the users who choose “severe dirt” when there is a laundry that is heavily soiled with oil, mud, fruit juice, etc., in laundry that is hardly soiled. At this time, the amount of detergent supplied by the washing machine is large. If the dirt sensor determines that dirt removal is insufficient during the subsequent washing process, the detergent is additionally added, leading to waste of the detergent and further increasing dirty household wastewater. In addition, the same rinsing increases the amount of detergent remaining in the laundry clothes, and there is a problem in that adverse effects such as rough skin caused by the detergent may occur on the wearer of the clothes.

  In addition, there is a problem that it is difficult to cope with a laundry in which items having greatly different levels of dirt are mixed. For example, if there is a mixture of “severe dirt” and “slightly dirty” laundry, washing together will use a lot of detergent and water, resulting in longer washing time. In addition, there is a risk that the dirt removed from the “severe dirt” laundry will reattach to the “slightly dirty” laundry. On the other hand, if they are washed in two steps, the consumption of detergent and water is nearly doubled, and the washing time is also doubled.

  The present invention solves the above-described conventional problems, and provides a washing machine that can perform optimal washing according to the level of dirt of the laundry even when the laundry has a mixture of things with greatly different levels of dirt. The purpose is to do.

In order to solve the above-described conventional problems, the washing machine of the present invention includes a laundry tub for storing laundry, a laundry weight detection unit for detecting the amount of laundry put into the laundry tub, and turbidity of washing water. Detecting the soiling of the laundry by detecting the dirt, automatic detergent loading device that automatically puts the detergent in the washing process, the transmission part that conveys information such as washing operation status to the user, washing and rinsing A control unit that controls each process such as dehydration and executes a washing operation, and the control unit detects turbidity information of the washing water detected by the dirt detection unit during pre-washing of the first washing process. The turbidity change is judged on the basis of this, the prewashing is terminated, and in the subsequent main washing, the detergent is automatically charged and water is supplied by the detergent automatic charging device, and the main washing washing water detected by the dirt detection unit Main wash by judging turbidity change based on turbidity information The transmission unit transmits the end of the first washing process to the user to temporarily stop the washing operation, and then sends a signal indicating that a predetermined button has been pressed after the user has added laundry. In response, the detergent is introduced by the automatic detergent introduction device and water is supplied to start the second washing process.

  With this configuration, a laundry with a lot of dirt and a laundry with a little dirt can be washed at the same time, and the washing time, the amount of detergent used, and the amount of water used can be reduced as compared with the case of washing separately. And the effect which can improve the finish of a laundry is acquired with respect to the laundry of any dirt level.

  The washing machine of the present invention can wash laundry with much dirt and laundry with little dirt at the same time, and can reduce the washing time, the amount of detergent used and the amount of water used compared to the case of washing separately. At the same time, it is possible to suppress the redeposition of the dirt once removed and to improve the finish of the laundry with respect to the laundry of any dirt level.

Side surface sectional drawing of the washing machine in Embodiment 1 of this invention Block circuit diagram of the washing machine in Embodiment 1 of the present invention The flowchart which shows the washing driving | operation operation | movement of the washing machine in Embodiment 1 of this invention.

  A washing machine according to a first aspect of the present invention includes a washing tub that accommodates laundry, a laundry weight detection unit that detects the amount of laundry put in the laundry tub, and a turbidity of the washing water by detecting the turbidity of the washing water. Controls each process such as washing, rinsing, dehydration, etc. And a control unit that executes a washing operation, and the control unit determines a turbidity change based on turbidity information of the washing water detected by the dirt detection unit at the time of pre-washing in the first washing process. The pre-washing is then terminated, and in the subsequent main washing, the detergent is automatically charged and water is supplied by the detergent automatic charging device, and the turbidity is determined based on the turbidity information of the main washing washing water detected by the dirt detector. The main wash is completed after judging the change, and the transmission unit The end of the first washing process is transmitted to the user to stop the washing operation, and then the user automatically inputs the detergent upon receiving a signal indicating that a predetermined button has been pressed after the laundry is added. A detergent is put into the apparatus and water is supplied to start the second washing process.

  According to the washing machine of this configuration, after the first washing process is completed, the user is informed that the first washing process is completed, and after the user adds laundry, the second washing process is started. Therefore, it is possible to carry out pseudo separate washing in one wash, and even when the laundry is mixed with items with greatly different levels of stains, the finish of the laundry at both stain levels can be improved. An effect is obtained.

  In addition, when washing laundry with a lot of dirt and laundry with a little dirt, it is common to wash a laundry with a lot of dirt and a laundry with little dirt, but there is only one washing machine. By washing each laundry, about twice as much as the case where washing time is performed at once is required, and about twice as much detergent and water are required. In the washing machine having the above-described configuration, it is necessary for the user to add additional laundry in the middle of the washing process by performing pseudo-separation. Can be washed at the same time. Therefore, the effect that the washing time, the amount of detergent, and the amount of water can be significantly reduced is obtained.

  In addition, in conventional washing machines, when washing is performed together, there are problems such as dirt on the laundry with much dirt sticking to the laundry with little dirt, and the finish of the laundry with little dirt is not so good. there were. According to the washing machine configured as described above, the problem of this re-adhesion suppression is achieved by detecting the turbidity of the washing water in the pre-washing and the main washing of the first washing step and washing it thoroughly in advance. On the other hand, the effect which can perform a big improvement is acquired.

  Further, the washing machine having the above-described configuration detects and checks the turbidity change of the washing water during the pre-washing and the main washing in the first washing process, and sets the first and second to be adapted to each washing. Based on the predetermined value, it is determined whether or not each washing is completed, and the process proceeds to the next step. With this configuration, it is possible to suppress the reattachment of laundry having a large amount of dirt input to the first washing process to the laundry having a small amount of dirt input in the second washing process. Therefore, the effect which can improve the finish of both laundry is acquired.

  According to a second aspect of the present invention, the user can select whether or not the detergent is supplied at the time of pre-washing in the first washing step, and when the presence of the detergent at the time of pre-washing is selected, the control unit In the second washing process, the detergent is introduced by the automatic detergent introduction device at the time of pre-washing. With this configuration, it is possible to perform washing using a detergent at the time of pre-washing in the first washing step in accordance with the user's judgment and intention for the degree of dirt on the laundry. As a result, the laundry can be satisfactorily removed when the first washing step is completed, and an effect of improving the finished level of all the laundry when the second washing step is completed can be obtained.

  It is also possible for the user to select that no detergent is added during pre-washing in the first washing step. This makes it possible to reduce the amount of detergent used at the discretion of the user.

  According to a third aspect of the present invention, in the second washing step, the control unit determines a dirt level of the laundry based on a signal from the dirt detection unit, and adjusts to the determined dirt level from the detergent automatic input device. Additional detergent is added. With this configuration, in the second washing process, the total dirt concentration from the laundry washed in the first washing process and the laundry thrown in in the second washing process is detected, and the detected dirt concentration Washing according to the level of dirt and the total amount of laundry determined based on Therefore, the effect of greatly improving the finish of the laundry can be obtained.

  4th invention is provided with the input setting part which can input the amount of laundry put in in the said 2nd washing process at the time of the said 1st washing process start. When the amount of laundry in the second washing process is detected, the laundry used in the first washing process is present in the washing tub in a wet state. In this state, it is very difficult to measure and estimate the amount of laundry put in the second washing step. On the other hand, according to the washing machine having the above configuration, the user inputs in advance the amount of laundry to be input in the second washing step before the start of the first washing step by the input setting unit. Can do. Thereby, the control part can grasp | ascertain correctly correctly the amount of the laundry used by the 1st time and the 2nd washing process, respectively. Therefore, in the second washing step, the amount of detergent to be added and the washing time can be set correctly according to the exact total amount of laundry. Accordingly, it is possible to perform appropriate washing according to the amount of laundry, and the effect of improving the finish of the laundry can be obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments. Moreover, what is called washing water in the following embodiments indicates water containing a detergent component used in the washing step.

(Embodiment 1)
FIG. 1 is a side sectional view of a washing machine according to Embodiment 1 of the present invention. FIG. 2 is a block circuit diagram of the washing machine according to Embodiment 1 of the present invention. FIG. 3 is a flowchart showing a washing operation of the washing machine according to Embodiment 1 of the present invention.

  The washing machine according to the present embodiment is a drum type washing machine that performs washing by rotating, rotating, and rotating the rotating drum in which the laundry is stored. As shown in FIG. 1, a water receiving tank 2 is disposed inside a drum type washing machine 1. A rotating drum 3 serving as a washing tub is disposed inside the water receiving tub 2 so as to be rotatable around a horizontal rotation axis. The rotating drum 3 is rotated by a motor 4 connected to the back surface.

  Each of the water receiving tank 2 and the rotating drum 3 is formed in a bottomed cylindrical shape having an opening on the front surface. An opening / closing door 27 is provided on the front surface of the drum type washing machine 1 so as to face the front opening of the water receiving tub 2 and the rotating drum 3. The user opens the door 27 and puts the laundry in and out of the rotary drum 3.

  The rotating drum 3 is provided with a plurality of through holes (not shown) on the outer peripheral surface, and water and air circulate therethrough. Also. Several protrusion plates (not shown) are provided on the inner wall surface, and the laundry is lifted and stirred. The rotating drum 3 functions not only as a washing tub, but also as a dehydrating tub and a drying tub depending on the process to be executed.

  A water intake 5 is connected to the lowest part on the rear side of the water receiving tank 2. The water intake 5 is connected to a drain pipe 7 that is opened and closed by a drain valve 6. A circulation path 9 is provided from between the water intake 5 and the drain valve 6. A discharge port 8 is formed at the tip of the circulation path 9 and is opened from the front lower portion of the water receiving tank 2 into the rotary drum 3. A circulation pump 10 is incorporated in the circulation path 9. By driving the circulation pump 10, the wash water in the water receiving tub 2 passes through the circulation path 9 and is discharged into the rotary drum 3 as a circulation shower. In this way, washing water can be poured onto the laundry in the rotary drum 3.

  Above the water receiving tank 2, a water supply valve 11 that controls water supply into the water receiving tank 2 is provided. A water level detection unit 12 is provided in communication with the water receiving tank 2. The water level detector 12 detects the water level in the water receiving tank 2. Further, a dirt detection unit 13 is provided in the circulation path 9. The dirt detection unit 13 is configured by a turbidity sensor or the like, and detects the dirt concentration of the wash water flowing in the circulation path 9. By this detection, the dirt detector 13 detects the dirt of the laundry.

  The detergent storage unit 14 is used for charging a detergent used during the washing process and a softening agent used during the rinsing process. The detergent storage unit 14 is provided with a detergent automatic charging device 15 having storage units (not shown) for liquid detergent and softening agent, and a receiving part 14a for receiving the liquid detergent and softening agent to be charged. The water that has passed through the water supply valve 11 passes through the receiving portion 14a of the detergent storage portion 14, and at this time, the liquid detergent or softening agent introduced into the receiving portion 14a is poured into the water receiving tank 2 together with the supplied water.

  As shown in FIG. 2, the control device 17 includes a control unit 18 configured with a microcomputer. The control unit 18 controls operations of the motor 4, the drain valve 6, the circulation pump 10, the water supply valve 11 and the like via the power switching unit 19, and sequentially controls a series of processes such as washing, rinsing, and dehydration.

The input setting unit 20 is a course input unit 20a for inputting a driving course, and a detergent introduction input / output unit 20 for pre-washing that selects whether or not to put a detergent at the time of pre-washing in the first washing process.
b and a laundry amount setting unit 20c for setting the amount of laundry to be input during the second washing step. The user inputs the operation course, the presence / absence of the detergent at the time of pre-washing in the first washing step, and the amount of laundry to be thrown in at the second washing step by each part.

  The control unit 18 receives information from the input setting unit 20 and displays the information on the display unit 21 based on the information to notify the user. The storage unit 22 stores data necessary for the control unit 18 to control. The power switch 24 turns on and off the commercial power source 23 supplied to the drum type washing machine 1.

  The drum type washing machine 1 is provided with a rotation speed detection unit 25 that detects the rotation speed of the rotary drum 3. Information of the rotational speed detection unit 25 is sent to the control unit 18, and the control unit 18 controls the rotation of the motor 4 through the power switching unit 19 to drive the rotary drum 3. In addition, the drum type washing machine 1 is provided with a laundry weight detection unit 26 that detects the weight (amount of laundry) of the laundry accommodated in the rotary drum 3.

  The drum-type washing machine 1 is provided with a transmission unit 30 that informs the user of information such as the washing operation status. For example, the transmission unit 30 receives a signal from the control unit 18 at the end of the first washing process and notifies the user that the first washing has been completed. The transmission unit 30 can be configured by a buzzer, a melody, illumination, or the like. The display unit 21 may also be used. Moreover, what has the function to transmit a message to portable terminals, such as a smart phone which the user is using, may be sufficient, and the apparatus which has the said transmission function is not limited.

  About the drum-type washing machine 1 comprised as mentioned above, the operation | movement and an effect | action are demonstrated using FIG.

  When the user puts laundry into the rotating drum 3 and presses the power switch 24, the washing operation of the drum type washing machine 1 starts. As a result, the course input unit 20a of the input setting unit 20 has a washing course, the presence / absence of detergent input during the pre-washing input unit 20b, the presence / absence of detergent addition during the first washing step, and the laundry amount setting unit 20c 2 The amount of laundry to be input in the second washing process can be input (step 1).

  The user selects a washing course, for example, a “pseudo divided washing course” by the course input unit 20a (step 2). Accordingly, it becomes a scene to select whether or not detergent is to be added at the time of pre-washing, and the user selects whether or not to supply detergent at the time of pre-washing in the first washing process by the detergent input / not-input unit 20b at the time of pre-washing (step). 3). Next, it becomes the scene which sets the amount of laundry put in at the 2nd washing process. The setting of the laundry amount is configured such that the user can select and set, for example, any one of 1 kg or less, 2 kg or less, 3 kg or less, or 4.5 kg or less by the laundry amount setting unit 20c. When the amount of laundry put in the second washing process is set, the input to the input setting unit 20 is finished (step 4).

  Next, when the user presses the washing start button and the first washing process is started in the selected “pseudo divided washing course”, the laundry weight detection unit 26 selects the first washing object. The weight of the laundry (the amount of laundry) is detected (step 5). The laundry weight detection is performed by detecting the magnitude of the drive current signal of the motor 4 when the control unit 18 controls the motor 4 to rotate the rotating drum 3 together with the laundry.

Based on the detected weight of the laundry and whether or not the detergent is supplied at the time of the pre-washing, which is input from the input setting unit 20, the control unit 18 determines the amount of detergent to be washed in the first washing process and the main washing. (Step 6). The amount of detergent used for the first washing is set to 1 times and 0.5 times the amount of standard detergent set according to the amount of laundry, for example, in pre-washing and main washing.

  When the presence / absence of the detergent input in the pre-washing and the amount of detergent input in the pre-washing and main washing are determined as described above, the control unit 18 starts the pre-washing. When it is selected that the detergent is supplied in the pre-washing, the control unit 18 transmits a signal to the automatic detergent charging device 15, and the automatic washing device 15 supplies the pre-washing detergent set as described above to the receiving unit 14a. (Step 7). When “no detergent input in pre-washing” is selected, the control unit 18 does not perform detergent injection and shifts the operation to the next step.

  In pre-washing, the control unit 18 opens the water supply valve 11, and the water that has passed through the water supply valve 11 passes through the detergent storage unit 14. At this time, a liquid detergent of 1 times the standard detergent amount determined according to the amount of laundry is poured into the water receiving tank 2 together with the supplied water from the insertion port 16 of the detergent automatic charging device 15 (step 8). .

  Thereafter, the control unit 18 performs pre-washing with washing water having a high detergent concentration (step 9). The control unit 18 drives the rotary drum 3 in accordance with a sequence of “right rotation 11 seconds → stop 4 seconds → left rotation 11 seconds → stop 4 seconds → right rotation 11 seconds”, for example. The control unit 18 further drives the circulation pump 10. Thereby, the wash water in the water receiving tank 2 passes through the circulation path 9 and is discharged into the rotary drum 3 as a circulation shower. When the water level detector 12 detects that the water level in the water receiving tank 2 has reached the predetermined water level, the control unit 18 starts counting the washing time and sends a signal to the water supply valve 11 to supply the water receiving tank 2 to the water receiving tank 2. Water supply is stopped and the circulation pump 10 is stopped.

  After that, the control unit 18 performs tumbling on the rotating drum 3 in the same manner as described above in accordance with the sequence of “right rotation 11 seconds → stop 4 seconds → left rotation 11 seconds → stop 4 seconds → right rotation 11 seconds”. carry out. The control unit 18 further starts the operation of the circulation pump 10 and sends a signal to the water supply valve 11 by the signal of the water level detection unit 12, restarts the water supply to the water receiving tank 2, performs water supply to a predetermined water level, Complete the water supply.

  Thereafter, the control unit 18 continues the pre-washing (step 10). The control unit 18 drives the rotating drum 3 in a cycle of “right rotation 11 seconds → stop 4 seconds → left rotation 11 seconds → stop 4 seconds → right rotation 11 seconds”. The controller 18 further drives the circulation pump 10 to perform pre-washing while discharging the wash water in the water receiving tub 2 into the rotary drum 3 as a circulation shower through the circulation path 9.

  During the pre-washing, the control unit 18 detects the turbidity of the washing water, for example, every second by the dirt detection unit 13 and checks the change of the turbidity (step 11). When the turbidity change every second or the turbidity change within a predetermined time is equal to or less than the first predetermined value, the control unit 18 determines that the elution of dirt from the laundry has decreased. And the control part 18 stops rotation of the rotating drum 3, opens the drain valve 6, discharges the wash water in the water receiving tank 2 out of the drum type washing machine 1 through the drain pipe 7, and finishes prewashing. (Step 12).

  After the pre-washing is completed, the control unit 18 shifts the washing process to the main washing of the first washing process (step 13). The control unit 18 opens the water supply valve 11, and the water that has passed through the water supply valve 11 passes through the detergent storage unit 14. At this time, the liquid detergent for main washing 0.5 times the standard detergent amount determined by the amount of laundry, for example, from the inlet 16 of the automatic detergent feeder 15 enters the water receiving tank 2 together with the supplied water. Poured into.

  Thereafter, the control unit 18 performs the same operation as the pre-washing step 9 and step 10 as the main washing (step 14 and step 15).

  During the main washing, the control unit 18 detects the turbidity of the washing water, for example, every second by the dirt detection unit 13, and checks the change of the turbidity (step 16). When the turbidity change every second or the turbidity change within a predetermined time is equal to or less than the second predetermined value, the control unit 18 determines that the elution of dirt from the laundry in the main washing has considerably decreased. . And the control part 18 stops rotation of the rotating drum 3, opens the drain valve 6, discharges the washing water in the water receiving tank 2 out of the drum type washing machine 1 through the drain pipe 7, and completes the main washing. . And the control part 18 complete | finishes the 1st washing process with completion | finish of a main wash, and pauses a washing driving operation (step 17).

  Next, the control unit 18 sends a signal to the transmission unit 30 at the time of final drainage of the main washing or at the end of the first washing process, and the first washing process is completed for the user by the function of the transmission unit 30. This is notified (step 18).

  After that, when the user confirms the notification of the transmission unit 30 and additionally inputs laundry with little dirt (step 19) and presses a predetermined button (for example, start button) for continuing washing, the second time The washing process is started (step 20). Based on the information on the amount of laundry input in the second washing step input by the user at the start of the first washing step and the amount of laundry detected by the laundry weight detection unit 26, the control unit 18 Calculate the weight of the item (total amount of laundry). Then, the standard detergent amount corresponding to the total amount of laundry and the amount of detergent to be introduced at the start of the second washing step are calculated and determined.

  When the amount of detergent to be introduced at the start of the second washing process is determined, the control unit 18 opens the water supply valve 11, and the water that has passed through the water supply valve 11 passes through the detergent storage unit 14. At this time, 0.5 times as much liquid detergent as the standard detergent amount determined according to the total amount of laundry is discharged from the insertion port 16 of the detergent automatic loading device 15 to the receiving portion 14a of the detergent storage unit 14 and supplied with water. It is poured into the water receiving tank 2 together with water (step 21).

  Thereafter, the control unit 18 starts pre-washing (step 22). The concentration of the detergent in this pre-washing is lower than that in the first washing step. The control unit 18 drives the rotary drum 3 in accordance with a sequence of “right rotation 11 seconds → stop 4 seconds → left rotation 11 seconds → stop 4 seconds → right rotation 11 seconds”, for example. The control unit 18 further drives the circulation pump 10. Thereby, the wash water in the water receiving tank 2 passes through the circulation path 9 and is discharged into the rotary drum 3 as a circulation shower. When the water level detector 12 detects that the water level in the water receiving tank 2 has reached the predetermined water level, the control unit 18 starts counting the washing time and sends a signal to the water supply valve 11 to supply the water receiving tank 2 to the water receiving tank 2. Water supply is stopped and the circulation pump 10 is stopped.

After that, the control unit 18 performs tumbling on the rotating drum 3 in the same manner as described above in accordance with the sequence of “right rotation 11 seconds → stop 4 seconds → left rotation 11 seconds → stop 4 seconds → right rotation 11 seconds”. carry out. The control unit 18 further starts the operation of the circulation pump 10 and sends a signal to the water supply valve 11 by the signal of the water level detection unit 12, restarts the water supply to the water receiving tank 2, performs water supply to a predetermined water level, Complete the water supply.
Thereafter, the control unit 18 performs pre-washing for a predetermined time (step 23).

  When the pre-washing is completed, the control unit 18 determines the laundry dirt level (step 24). The control unit 18 receives a signal relating to the stain concentration of the wash water detected by the stain detection unit 13. And the control part 18 determines a dirt level based on the database of the turbidity of the washing water which the control part 18 has.

Next, the control unit 18 determines the additional detergent amount and the remaining washing time at the time of the main washing in the second washing step, corresponding to the determined dirt level and the total laundry amount of the first and second times. (Step 25). The amount of additional detergent and the remaining washing time determined at this time are defined according to the level of dirt and the total amount of laundry, and are determined with reference to a previously prepared table.

  The controller 18 opens the water supply valve 11 and supplies a small amount of water necessary for pouring the amount of detergent determined in step 25 into the water receiving tank 2. Water passes through the detergent container 14. At this time, the amount of detergent determined in accordance with the dirt level and the total amount of laundry in Step 25 is discharged from the insertion port 16 of the detergent automatic charging device 15 to the receiving portion 14a, and received together with a small amount of water to be supplied. It is poured into the tank 2 (step 26).

  Thereafter, the control unit 18 performs main washing (step 27). The control unit 18 drives the rotary drum 3 in accordance with a sequence of “right rotation 11 seconds → stop 4 seconds → left rotation 11 seconds → stop 4 seconds → right rotation 11 seconds”, for example. The control unit 18 further drives the circulation pump 10. As a result, the wash water in the water receiving tub 2 passes through the circulation path 9 and is discharged into the rotary drum 3 as a circulation shower. The control unit 18 continues the main washing for the remaining remaining washing time.

  When the controller 18 confirms that the remaining washing time has become zero, the rotation of the rotary drum 3 is stopped, the drain valve 6 is opened to drain water, and the second washing step is completed (step 28). ).

  When the control unit 18 finishes the second washing process, the control unit 18 proceeds to the rinsing process (step 29). The case where it is set that the rinsing process is performed twice in the rinsing process will be described. When drainage performed at the end of the second washing step is completed, first intermediate dehydration of the first rinse is started. The control unit 18 rotates the rotating drum 3 and increases the rotation speed of the rotating drum 3 to 900 r / min which is a predetermined rotation speed through balance control, and performs the first intermediate dehydration. By this first intermediate dehydration, the wash water remaining in the laundry is discharged out of the drum type washing machine 1, and the wash water contained in the laundry is reduced. When the rotating drum 3 is rotated at 900 r / min for a predetermined time, the control unit 18 sends a signal to the motor 4 to stop the rotation of the rotating drum 3.

  After the rotary drum 3 stops, the control unit 18 opens the water supply valve 11 and starts water supply. The water that has passed through the water supply valve 11 passes through the detergent container 14 and is stored in the water receiving tank 2. The control unit 18 starts the rotation of the rotary drum 3 at, for example, 50 r / min from the middle of water supply. At the same time, the circulation pump 10 is driven. As a result, the washing water in the water receiving tub 2 passes through the circulation path 9 and is discharged as a circulation shower into the rotary drum 3 to be rinsed for the first time. When the control unit 18 determines that the predetermined water level has been reached by the water level detection unit 12, the control unit 18 stops the water supply to the water receiving tank 2 by closing the water supply valve 11.

  Then, the control unit 18 determines that the first rinsing is completed when a predetermined time has elapsed, and opens the drain valve 6 to drain the rinse water accumulated in the water receiving tank 2.

  When drainage is completed, the second intermediate dehydration of the second rinse is started. The controller 18 rotates the rotary drum 3 to perform the second intermediate dehydration in the same manner as the first intermediate dehydration. By this second intermediate dehydration, the washing water remaining in the laundry is discharged out of the drum type washing machine 1, and the detergent contained in the laundry is reduced. When the rotating drum 3 is rotated at 900 r / min for a predetermined time, the control unit 18 sends a signal to the motor 4 to stop the rotation of the rotating drum 3.

After the rotary drum 3 stops, the control unit 18 opens the water supply valve 11 and starts water supply. The supplied water is stored in the water receiving tank 2 through the detergent container 14. At this time, the detergent container 14
When the softening agent is put into the water receiving tank 2, the softening agent is poured into the water receiving tank 2 together with the supplied water.

  Then, the control unit 18 performs the second rinsing in the same manner as the first rinsing, and when the predetermined time has elapsed, determines that the second rinsing is completed, opens the drain valve 6 and rinses in the water receiving tank 2. Drain the water.

  In the above rinsing process, the liquid detergent is not charged into the water that has passed through the water supply valve 11 from the detergent automatic charging device 15. The water that has passed through the water supply valve 11 is supplied as it is into the water receiving tub 2 and further into the rotating drum 3 in which the laundry is accommodated, and is used for rinsing.

  When the drainage performed after the end of the second rinse is completed, the final dehydration process is started (step 30). The control unit 18 rotates the rotating drum 3 and increases the rotational speed of the rotating drum 3 to 900 r / min, which is a predetermined rotational speed for final dehydration, through balance control, and performs the final dehydration process. By this final dehydration step, the washing water remaining in the laundry is discharged out of the drum type washing machine 1, and the detergent contained in the laundry is almost eliminated. When the rotating drum 3 is rotated at 900 r / min for a predetermined time, the control unit 18 sends a signal to the motor 4 to stop the rotation of the rotating drum 3. When the rotating drum 3 is stopped, the washing operation ends (step 31). Then, the control unit 18 turns off the power of the drum type washing machine 1.

  As described above, the drum-type washing machine 1 according to the present embodiment is configured to wash laundry with a large amount of dirt in the first washing process, and after the first washing process is completed, the first washing process is completed. The information is transmitted to the user by the transmission unit 30. And a user adds the laundry with few stain | pollution | contamination, and performs the 2nd washing process and the subsequent rinse process and final dehydration process. As a result, it is possible to carry out pseudo separate washing with one wash. Furthermore, the effect which can improve the finishing of both the laundry with much dirt and the laundry with little dirt is acquired.

  In addition, when washing a laundry with a lot of dirt and a laundry with a little dirt, it is a common practice to wash a laundry with a lot of dirt and a laundry with a little dirt separately. In the case of a single washing machine, when each laundry is separated and washed, the washing time is required approximately twice as much as when the washing is performed all at once, and the detergent and water are also required approximately twice. The drum type washing machine 1 according to the present embodiment performs the pseudo divided washing as described above, so that the user needs to add laundry in the middle of the washing process. Laundry with a lot of laundry and laundry with little dirt can be washed at the same time. Therefore, the effect that the washing time, the amount of detergent, and the amount of water can be significantly reduced is obtained.

  In addition, when washing is performed together, there is a problem that the dirt of the laundry with much dirt adheres to the laundry with little dirt and the finish of the laundry with little dirt is not so good. The drum type washing machine 1 in the present embodiment can obtain an effect of solving this problem by washing laundry with much dirt in advance.

In addition, the drum type washing machine 1 in the present embodiment can select whether or not the detergent is supplied during pre-washing in the first washing step. When the laundry is very dirty, in the first washing process, in the pre-washing, by adding a larger amount of detergent than in the main washing, the first washing is performed by removing most of the dirt by pre-washing. More dirt can be removed more efficiently by the main washing in the washing step. As a result, it is possible to considerably reduce the level of dirt before the start of the second washing process for laundry with much dirt. Thereby, when the laundry with few stains is washed together in the second washing step, it is possible to suppress the adverse effect of the stain of the laundry with a lot of stains used for the first washing. Therefore, the effect which can improve the finish of both laundry is acquired. In addition, it is possible to reduce the amount of detergent by pre-washing the first washing step without using a detergent at the user's discretion.

  In addition, the drum type washing machine 1 in the present embodiment detects and checks the turbidity change of the washing water during the pre-washing and the main washing in the first washing step, and is set according to each washing. Based on the first and second predetermined values, it is determined whether or not each washing is completed and the process proceeds to the next step. With this configuration, it is possible to obtain a cleaning effect with certainty and to prevent redeposition of the dirty laundry put into the first washing process to the less washed laundry put into the second washing process. it can. Therefore, the effect which can improve the finish of both laundry is acquired.

  In addition, in the second washing process, the dirt detection unit 13 detects the total dirt density from the laundry washed in the first washing process and the laundry thrown in in the second washing process, This is transmitted to the control unit 18. Then, the control unit 18 sets the detergent level and the washing time according to the dirt level determined based on the detected dirt density and the total laundry quantity, and controls the second washing process. Thus, in the second washing step, it is possible to perform optimum washing for each laundry according to the level of dirt. Therefore, the effect of greatly improving the finish of the laundry can be obtained.

  Further, in the second washing step, the laundry used in the first washing step is present in the rotating drum 3 in a wet state. As a result, it is very difficult to measure and estimate the amount of laundry put in the second washing step. On the other hand, in the drum type washing machine 1 according to the present embodiment, the amount of laundry put in the second washing step is set by the user using the laundry amount setting unit 20c before the start of the first washing step. It is configured to input in advance. With this configuration, the control unit 18 can correctly grasp the amount of laundry used in the first and second washing steps individually. Therefore, in the second washing step, the amount of detergent to be added and the washing time can be set correctly. Accordingly, it is possible to perform appropriate washing according to the amount of laundry, and the effect of improving the finish of the laundry can be obtained.

  In the present embodiment, the water receiving tank 2 and the rotating drum 3 are arranged horizontally, but the water receiving tank 2 and the rotating drum 3 may be inclined. Moreover, the timing of the water supply in the washing process, the rinsing process, and the final dehydration process, the timing of the circulating shower, the rotational speed of the rotary drum 3 and the like are not particularly limited by the above embodiment. Also, the amount of liquid detergent supplied from the automatic detergent charging device 15, the washing time, the level of dirt on the laundry, etc. are not particularly limited.

  Moreover, in the said embodiment, although the control part 18 judges whether the turbidity change of wash water is below a predetermined value, the stain | pollution | contamination detection part 13 may perform this function.

  In addition, the automatic loading of the softening agent has been described on the assumption that the detergent storage unit 14 and the automatic detergent charging device 15 common to the liquid detergent are used. However, a storage unit dedicated to the softening agent or an automatic charging device is installed, There is no particular problem with the configuration in which the softening agent is automatically charged by these.

As described above, in the washing machine according to the present invention, the control unit determines the turbidity change based on the turbidity information of the washing water detected by the dirt detection unit during the pre-washing of the first washing process. Pre-washing is completed, and in the subsequent main wash, the detergent is automatically charged and water is supplied, and the turbidity change is determined based on the turbidity information of the main wash washing water detected by the dirt detector. Then, the main washing is finished, the end of the first washing process is transmitted to the user by the transmission unit, the washing operation is temporarily stopped, and a signal that a predetermined button is pressed by the user after the addition of the laundry In response, the detergent is introduced by the automatic detergent introduction device and water is supplied to start the second washing process. As a result, a laundry with a lot of dirt and a laundry with a little dirt can be washed at the same time, so that the washing time, the amount of detergent used, and the amount of water used can be reduced as compared with the case of washing separately. And the effect which can improve a finishing with respect to the laundry of any dirt level is acquired. Therefore, the washing machine according to the present invention is particularly useful as a household washing machine and a washing / drying machine that often wash laundry having different soil levels.

1 Drum-type washing machine 2 Water receiving tank 3 Rotating drum (washing tank)
4 Motor (drive unit)
6 Drain valve 9 Circulation route 10 Circulation pump 11 Water supply valve (water supply section)
DESCRIPTION OF SYMBOLS 12 Water level detection part 13 Dirt detection part 15 Detergent automatic injection | throwing-in apparatus 17 Control apparatus 18 Control part 20 Input setting part 20a Course input part 20b Detergent input presence / absence input part 20c Laundry amount setting part 26 Laundry weight detection part 30 Transmission Part

Claims (4)

A washing tub for storing laundry, a laundry weight detection unit for detecting the amount of laundry put in the laundry tub, a stain detection unit for detecting turbidity of the washing water and detecting dirt on the laundry, and a washing Detergent automatic loading device that automatically loads the detergent during the process, a transmission unit that conveys information such as the washing operation status to the user, and a control unit that executes the washing operation by controlling each process such as washing, rinsing and dehydration The control unit determines the turbidity change based on the turbidity information of the washing water detected by the dirt detection unit during the pre-washing of the first washing process, and then finishes the pre-washing. In the main washing, the detergent is automatically charged and water is supplied by the detergent automatic charging device, and the main washing is finished by judging the turbidity change based on the turbidity information of the washing water detected by the stain detection unit. And the first wash by the transmission unit The end of the operation is transmitted to the user, the washing operation is temporarily stopped, and then the user receives a signal indicating that a predetermined button is pressed after the laundry is additionally charged, and the detergent is automatically loaded by the detergent automatic loading device. A washing machine characterized by supplying water and starting a second washing process. The user can select whether or not the detergent is added at the time of the pre-washing in the first washing step, and when the presence of the detergent at the time of pre-washing is selected, the control unit, in the first washing step, 2. The washing machine according to claim 1, wherein the detergent is introduced by the detergent automatic introduction device at the time of pre-washing. In the second washing step, the control unit determines the level of laundry in accordance with a signal from the stain detection unit, and additionally supplies detergent from the detergent automatic charging device according to the determined level of dirt. The washing machine according to claim 1 or 2. The washing machine according to any one of claims 1 to 3, further comprising an input setting unit capable of inputting an amount of laundry to be input in the second washing step at the start of the first washing step. .

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