JP2018130237A - 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., even when laundries having different degrees of soiling are mixed.SOLUTION: The washing machine comprises: a rotary drum 3 for accommodating laundry; a laundry weight detection part 26 for detecting an amount of laundry loaded into the rotary drum 3; a soil detection part 13 for detecting soil of the laundry; a detergent automatic feeding device 15 for automatically feeding a detergent during a washing step; a transmission part 30 for transmitting information on a washing operation state etc, to a user; and a control part 18 for controlling each of the steps of washing, rinsing, and dewatering, etc. and executing a washing operation. The control part 18 transmits a termination of a first washing step to the user by the transmission part 30, then temporarily stops the washing operation, and upon receiving a signal that a predetermined button has been pressed after next laundry is loaded by the user, sends a signal to the detergent automatic feeding device 15 to feed a detergent and supply water, and starts a second washing step.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, a washing machine according to 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 dirt on the laundry. Controls each process such as washing, rinsing, dehydration, etc., a stain detection unit to detect, an automatic detergent introduction device that automatically puts detergent during the washing process, a transmission unit that conveys information such as washing operation status to the user, etc. A control unit that executes a washing operation, and the control unit transmits the end of the first washing process to the user by the transmission unit, then temporarily stops the washing operation and inputs the next laundry by the user. A signal indicating that a predetermined button has been pressed later is received, a signal is sent to the automatic detergent introduction device to supply the detergent, 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. In addition, the effect of improving the finish of the laundry can be obtained for any laundry 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, a stain detection unit that detects stains on the laundry, 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 transmits the end of the first washing process to the user by the transmission unit, then temporarily stops the washing operation, and the user presses a predetermined button after the next laundry is put in In response to the signal, a signal is sent to the detergent automatic charging device to supply the detergent and supply water, and the second washing process is started.

  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 divided washing, but washing with much dirt and washing with little dirt in one washing operation You can do laundry 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 having the above-described configuration, an effect that can solve this problem can be obtained by washing laundry with much dirt in advance.

In the second invention, in particular, in the first invention, in the first washing step, it is possible to select whether or not to perform pre-washing before the main washing. With this configuration, when washing a very dirty laundry in the first washing step, more dirt can be removed by pre-washing. Therefore, when the laundry with little dirt is washed together in the second washing step, it is possible to suppress the adverse effect of the dirt from the laundry in the first washing on the laundry with little dirt. And the effect which can improve the finishing level of both laundry is acquired.

  It is also possible for the user to choose not to pre-wash. Accordingly, it is possible to reduce the washing time, the amount of detergent and the amount of water by omitting the pre-washing and performing the first washing step at the user's discretion.

  According to a third aspect of the invention, in particular, in the first or second aspect of the invention, in the second washing step, the control unit determines the level of laundry soiling based on a signal from the soiling detection unit. In accordance with the dirt level, the detergent is further added from the automatic detergent introduction device. 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 this detected dirt is detected. Washing according to the dirt level determined based on the concentration and the total amount of laundry can be performed. Therefore, the effect of greatly improving the finish of the laundry can be obtained.

  In particular, the fourth invention includes, in any one of the first to third inventions, an input setting unit capable of inputting the amount of laundry to be input in the second washing step at the start of the first washing step. Is. 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 amount of laundry used in the first and second washing steps can be correctly grasped individually. 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 includes a course input unit 20a for inputting a driving course, a pre-washing presence / absence input unit 20b for selecting whether or not to perform pre-washing in the first washing step, and input in the second washing step. And a laundry amount setting unit 20c for setting the amount of laundry to be performed. The user inputs the operation course, the presence / absence of pre-washing in the first washing step, and the amount of laundry to be put in 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, a course of washing is input to the course input unit 20a of the input setting unit 20, the presence / absence of pre-washing in the first washing step is input to the pre-washing presence / absence input unit 20b, and the second washing step is input to the laundry amount setting unit 20c The amount of laundry 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). Along with this, it becomes a scene for selecting the presence or absence of pre-washing, and the user selects the presence or absence of pre-washing in the first washing step by the pre-washing presence / absence input unit 20b (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.

  The control unit 18 determines the detergent input amount and the washing time in the first washing process based on the detected laundry weight, the presence / absence of the pre-washing input from the input setting unit 20 and the information on the standard washing time. (Step 6). In the drum type washing machine 1 of the present embodiment, the pre-washing time is fixed at, for example, 3 minutes regardless of the amount of laundry. In addition, the amount of detergent used for the first washing is set to 1 times and 0.5 times the standard detergent amount set according to the amount of laundry, for example, in the pre-washing and the main washing.

  When the presence / absence of prewashing, the amount of detergent to be washed, and the washing time are determined as described above, the control unit 18 performs the washing operation as follows according to the presence / absence of prewashing selected by the user. If there is pre-washing, the control unit 18 transmits a signal to the automatic detergent charging device 15, and the liquid detergent for pre-washing set as described above is loaded into the receiving unit 14 a by the automatic detergent charging device 15 (step 7). When there is no pre-washing, the control unit 18 shifts the driving operation to the main washing (step 12).

  When pre-washing is performed, 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 control unit 18 further drives the circulation pump 10 to discharge the washing water in the water receiving tub 2 through the circulation path 9 as a circulation shower into the rotary drum 3 and prewash until the determined washing time has elapsed. Continue. When the control unit 18 detects that the washing time has reached a predetermined time (for example, 3 minutes), the control unit 18 stops the rotation of the rotary drum 3, opens the drain valve 6, and drains the washing water in the water receiving tank 2 into the drain pipe 7. Through the drum-type washing machine 1 to finish pre-washing (step 11).

  After the pre-washing is completed, the control unit 18 shifts the washing process to the main washing of the first washing process (Step 12). If there is no pre-washing, the washing operation directly moves from step 6 to step 12.

  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, when pre-washing is performed, the liquid detergent for main washing 0.5 times the standard detergent amount determined according to the amount of laundry is supplied from the insertion port 16 of the automatic detergent charging device 15. The water is poured into the water receiving tank 2 together with the water. In the case of no pre-washing, a liquid detergent that is one time the standard detergent amount determined according to the amount of laundry is poured into the water receiving tank 2 in the same manner as the main washing detergent.

  Then, the control part 18 performs the driving | running operation | movement similar to step 9-step 11 of prewash as a main wash (step 13-step 15). The control unit 18 ends the first washing process upon completion of the main washing, and temporarily stops the washing operation. And the control part 18 sends a signal to the transmission part 30, and notifies a user that the 1st washing process was complete | finished by the function of the transmission part 30 (step 16).

  After that, when the user confirms the notification of the transmission unit 30 and additionally inputs laundry with little dirt and presses a predetermined button (for example, a start button) for continuing washing, the second washing step is performed. Start (step 17).

  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 18).

  Thereafter, the control unit 18 starts pre-washing (step 19). 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 20).

  When the pre-washing is completed, the control unit 18 determines the laundry dirt level (step 21). 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 stain | pollution | contamination level based on the dirt density database 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 22). 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 control unit 18 opens the water supply valve 11 and supplies a small amount of water necessary for pouring the amount of detergent determined in step 22 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 level of dirt and the total amount of laundry in step 22 is discharged from the inlet 16 of the automatic detergent charging device 15 to the receiving portion 14a, and the water receiver is received together with a small amount of water to be supplied. It is poured into the tank 2 (step 23).

  Thereafter, the control unit 18 performs main washing (step 24). 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 25). ).

When the control unit 18 finishes the second washing process, the control unit 18 proceeds to the rinsing process (step 26). 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 rotary drum 3 and increases the rotation speed of the rotary drum 3 to 900 r / min, which is a predetermined rotation speed, through the balance control.
Perform 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, if the softening agent has been put into the detergent container 14, 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 27). 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 28). 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 according to the present embodiment enables selection of whether or not pre-washing is performed in the first washing process. When the laundry is very dirty, pre-washing is performed in the first washing process. And removing most of the dirt, the dirt can be more efficiently removed by the main washing in the first 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. Further, it is possible to reduce the washing time, the amount of detergent and the amount of water by omitting pre-washing and performing the first washing step at the user's discretion.

  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 level of dirt, washing time, amount of detergent and the like are not particularly limited.

  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 temporarily stops the washing operation after receiving the signal of the end of the first washing process from the transmission unit, and after the next laundry is put in by the user, In response to the signal that the button is pressed, a signal is sent to the automatic detergent charging device to supply the detergent 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 Pre-washing presence / absence input part 20c Laundry amount setting part 26 Laundry weight detection part 30 Transmission part

Claims (4)

A laundry 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 laundry stains, and a detergent is automatically added during the washing process. An automatic detergent loading device, a transmission unit that conveys information such as the washing operation status to the user, and a control unit that executes a washing operation by controlling each process such as washing, rinsing, and dehydration, the control unit, After the end of the first washing process is transmitted to the user by the transmission unit, the washing operation is temporarily stopped, and the user receives a signal indicating that a predetermined button has been pressed after the next laundry is loaded. The washing machine is characterized in that a signal is sent to the washing machine, the detergent is added, water is supplied, and the second washing process is started. The washing machine according to claim 1, wherein in the first washing step, whether or not to perform pre-washing can be selected before the main 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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