JP6706735B2 - Washing machine - Google Patents

Description

The present invention relates to a washing machine and a washer/dryer which include a rotatable washing tub in a housing and wash clothes and the like put in the washing tub.

In recent years, due to changes in the living environment, such as avoiding air pollution due to PM2.5 and yellow sand, and performing laundry at night, there are more and more opportunities to dry clothes that have been washed indoors until the wet clothes dry. May have an unpleasant odor, or clothing may have an unpleasant odor during use. As one of the causes of this unpleasant odor, it is considered that various bacteria inhabiting the clothes are derived from metabolites generated by metabolizing the dirt substances remaining on the clothes after washing as nutrients. ing.

In order to prevent the generation of this unpleasant odor, a method has been proposed in which the temperature of washing water at the time of washing is used to heat-kill the bacteria inhabiting the clothes (see, for example, Patent Document 1). In the washing method described in Patent Document 1, the washing machine is provided with a heating means, the washing water is heated to 40° C., soaked and placed in the washing machine, and then drained, and the supplied washing water is washed at 60° C. By raising the temperature to and performing the washing process at a high temperature, it has the function of improving the washing performance and killing the bacteria attached to the clothes.

In addition, a method has also been considered in which bacteria that live on clothes are not killed but are washed away during washing by improving the cleaning performance (for example, see Patent Document 2). In the washing method described in Patent Document 2, a double amount of the detergent amount that is usually set for the clothes put in the washing machine is put at the beginning of the washing process, and the clothes are washed twice through the drainage process and the water injection process. It is intended to improve the cleaning performance by carrying out the process.

JP, 2003-181190, A Japanese Patent Laid-Open No. 2012-075505

However, in the above-described conventional configuration, when the color clothing is washed at 60° C., color loss occurs, so that the target is limited to white clothing. In addition, there is a problem that shrinkage of fibers occurs and clothes are damaged by repeated washing. In addition, it is difficult to kill all the bacterial species that inhabit in terms of the killing effect of the bacteria that live on clothes, and it is difficult to completely prevent the generation of unpleasant odors after washing. Further, even if the sterilization is limited to white clothes, there is a problem that the washing time is increased to 60° C. and thus the washing time becomes long and the power consumption increases.

Furthermore, in the method in which the washing step is divided into two steps and the usual amount of detergent is added before the first washing step, foaming becomes severe when the amount of dirt attached to the laundry is small. Then, there is a problem that the cushioning effect of the generated foam reduces the effect such as tap washing, and the cleaning performance deteriorates.

The present invention is to solve the above-mentioned conventional problems. By repeating the washing process using lower temperature hot water through the drainage process and the water supply process without raising the temperature of the washing water to 60°C, the present invention can be applied to clothes. To provide a washing machine that enhances the cleaning effect on living bacteria to reduce the number of living bacteria after washing and reduces the amount of metabolites caused by these living bacteria to suppress unpleasant odor during drying and use of laundry clothes. With the goal.

To achieve the above object, a washing machine according to the present invention includes a washing tub rotatably installed in a water tub, a motor for rotationally driving the washing tub, and a water supply unit for supplying washing water to the water tub, A drainage means for draining the washing water in the water tub, a cloth amount detecting means for detecting the amount of laundry put in the washing tub, a water temperature sensor for detecting the temperature of the washing water supplied in the water tub, and A heater for heating water, an operation unit for the user to select a course for washing operation, a display unit for displaying various information, and a control unit for controlling the washing operation for each step of washing, rinsing, and dehydrating. In the setting of the washing step, the control unit has a room temperature washing course in which the washing water is not heated by the heater and a warm water washing course in which the washing water is heated by the heater, and is detected by the cloth amount detecting means. In the washing machine that sets the amount of detergent according to the amount of laundry, in the washing process of the warm water washing course, the control unit sets the amount of detergent according to the amount of laundry to the amount of laundry in the room temperature washing course. A series of operations of water supply by the water supply means, washing in which the washing tub is rotationally driven and drainage by the drainage means are set after the detergent is put in, while the amount of detergent is set to be larger than the corresponding amount. Is carried out multiple times.

As a result, it is possible to sterilize the bacteria that inhabit the clothes without raising the temperature of the washing water at the time of washing to 60°C, and it is possible to sterilize not only the white clothes but also the colored clothes. Therefore, it is possible to suppress the generation of unpleasant odors when the laundry clothes are dried or used. In addition, for sterilization from clothes, by increasing the detergent input amount from the normal standard amount, it is possible to enhance the effect of rinsing not only dirt but also attached bacteria, and further, through drainage and water supply. It is possible to prevent reattachment of washed-out bacterial cells by repeatedly washing the clothes, and to reduce the number of bacteria adhering to the clothes after washing. It is possible to suppress the generation of unpleasant odor in the.

INDUSTRIAL APPLICABILITY The washing machine of the present invention can sterilize bacteria that inhabit on clothes without raising the temperature of washing water at the time of washing to 60° C., and disinfect not only white clothes but also colored clothes. Therefore, it is possible to suppress the generation of unpleasant odor when the laundry clothes are dried or used.

The schematic block diagram of the washing machine in Embodiment 1 of this invention. Block configuration diagram of the washing machine in the present embodiment Time chart of the disinfection operation of the washing machine in the present embodiment Graph showing sterilization effect under various washing conditions

A washing machine according to a first aspect of the present invention includes a washing tub that is rotatably installed in a water tub, a motor that drives the washing tub to rotate, a water supply unit that supplies washing water to the water tub, and a washing water for the water tub. Drainage means for draining water, cloth amount detection means for detecting the amount of laundry put in the washing tub, water temperature sensor for detecting the temperature of the washing water supplied in the water tub, and heater for heating the washing water The operation unit for the user to select the course of washing operation, the display unit for displaying various information, and the control unit for controlling the washing operation for performing each step of washing, rinsing, and dehydration, and the control unit, In the setting of the washing step, there is a room temperature washing course in which the washing water is not heated by the heater and a warm water washing course in which the washing water is heated by the heater, and depending on the amount of laundry detected by the cloth amount detecting means. In the washing machine that sets the amount of detergent with a washing machine, in the washing process of the warm water washing course, the control unit sets the amount of detergent according to the amount of laundry to a value greater than the amount of detergent according to the amount of laundry in the room temperature washing course. After setting a large number and displaying on the display unit, a series of operations of water supply by the water supply means, washing in which the washing tub is driven to rotate and drainage by the drainage means are carried out a plurality of times after detergent is put in. Is.

As a result, the washing machine of the present invention can use the enzyme contained in the detergent in a highly active state by performing the first wash with a high detergent concentration using the heated wash water, and It is possible to wash away various bacteria that inhabit in the same manner as dirt attached. Furthermore, after draining after washing, water is poured again and the second wash is performed with heated hot water for the second time, so that bacteria that inhabit the clothes that could not be washed off by the first wash can be washed away. It will be possible. At this time, by only draining water after the first washing and not performing dehydration, the amount of water supplied when the clothes are present in the drum in a state of containing warm water and the second washing is reduced, and the temperature is further raised. Therefore, it is possible to reduce the heating amount and heating time. In addition, by adding a larger amount of detergent than the usual amount during the first washing, the detergent dissolved in the warm water contained in the clothes when the drainage is finished enhances the washing effect in the second washing. It becomes possible. Furthermore, by draining the water between the two washes, the chances that the bacteria discharged from the clothes into the washing liquid in the first wash will adhere to the clothes again, and the washed bacteria can be reattached It is possible to suppress and eliminate various bacteria that inhabit the clothes at the end of washing.

2nd invention is provided with the dirt detection means which detects the dirt of washing water in 1st invention, Comprising: The said control part of the said washing|cleaning tank of the said washing|cleaning process in the said warm water washing course according to the magnitude of dirt. The number of rotations is changed. This suppresses the generation of bubbles in washing that occurs when the amount of detergent input is large with respect to the dirt adhering to the clothes, and does not reduce the effect of tap washing caused by the rotation of the washing tub. It becomes possible to wash away the various bacteria that inhabit, and it is possible to eliminate the various bacteria that inhabit the clothes at the end of washing.

In a third aspect based on the second aspect, the rotation speed of the washing tub in the first washing is lower when it is determined that the dirt is smaller than when it is determined that the dirt is large. is there. As a result, when it is determined that the amount of dirt is small, that is, the amount of detergent added is larger than the amount of dirt adhering to the clothes, and the rotation of the washing tub is likely to occur even when bubbles are easily generated as the washing tub rotates. By reducing the number of bubbles to suppress the growth of bubbles, it is possible to wash out various bacteria that inhabit on the clothes through multiple washings, and it is possible to remove the bacteria that inhabit the clothes after washing.

In a fourth aspect based on the second or third aspect, when it is determined that the stain is small, the rotation speed of the washing tub in the first washing is lower than the rotation speed of the washing tub in the second washing. is there. As a result, when it is determined that the dirt adhering to the clothes is small, the foaming in the first washing with a high detergent concentration is suppressed, and in both the first and the second washing, it is beaten with the rotation of the washing tub. By performing the washing, it is possible to wash away the various bacteria that inhabit the clothes, and after washing, it is possible to remove the various bacteria that inhabit the clothes. Furthermore, by reducing the bacteria that inhabit the clothes after washing, it is possible to suppress unpleasant odors derived from various bacteria even when the clothes are dried or when the clothes are used after being dried.

In a fifth aspect of the present invention, in any one of the first to fourth aspects, the amount of detergent in the warm water washing course is 1.5 to 2 times the amount of detergent according to the amount of laundry in the room temperature washing course. Is. As a result, it is possible to increase the detergent concentration in the first washing, and to enhance the washing performance by proceeding with washing at a water temperature at which the enzymes contained in the detergent are appropriately activated, and it is possible to improve the washing performance. It is possible to enhance the washing effect of. Further, in the second washing as well, drainage is only performed after the first washing, so that the detergent remains in the washing water contained in the clothes, and the residual detergent is used to wash away the bacterial cells in the second washing. It is possible to enhance the effect, and it is possible to eliminate bacteria that live on clothes after washing.

In a sixth aspect of the present invention, in any one of the first to fifth aspects, the control unit controls the water temperature of the wash water in the hot water washing course to be in the range of 35°C to 45°C. As a result, washing can be carried out in a highly active state without deactivating the enzyme contained in the detergent, and it is possible to enhance the sterilizing effect by washing away various bacteria that inhabit the clothes. In addition, discoloration and shrinkage can be prevented by performing sterilization within the above temperature range, and sterilization washing of colored clothes can be performed.

A seventh aspect of the invention is any one of the first to fifth aspects of the invention, further comprising a detergent automatic loading device that automatically deposits the detergent into the washing tub, wherein the control unit sets a set operation course and the cloth amount. The detergent is automatically added according to the amount of laundry detected by the detection means. As a result, the user does not have to rely on the user to dispense the detergent, the amount dispensed is accurate, and control that waits for the user's action becomes unnecessary. Further, even if the user starts washing, he/she can leave the place and the usability is improved.

Next, a washing machine according to an embodiment of the present invention will be described below with reference to the drawings to provide an understanding of the present invention. The following description is a specific example of the present invention and does not limit the content of the claims. Further, they can be combined within a possible range.

(Embodiment 1)
1 is a schematic configuration diagram of a washing machine according to Embodiment 1 of the present invention. FIG. 2 is a block configuration diagram of the washing machine in the present embodiment. FIG. 3 is a time chart of the disinfection operation of the washing machine in this embodiment.

In FIG. 1, an elastically supported water tank 2 is provided in a housing 1. In the water tub 2, a cylindrical drum 3 having a bottom, which is a washing tub, is rotatably provided. The shaft 3a of the drum 3 is inclined forward at an angle θ (for example, 5 degrees to 20 degrees).

A large number of small holes 5 communicating with the inside of the water tank 2 are provided on the peripheral side surface of the drum 3. Inside the peripheral side surface, a plurality of baffles 4 protruding inward are provided. On the front side, an opening 6 is provided through which laundry such as clothes (hereinafter referred to as laundry) is put in and out, and the housing 1, the water tank 2 and the drum 3 are opened. The opening of the drum 3 is provided with a ring-shaped balancer 7 for reducing the vibration generated by the unevenness of the laundry when the drum 3 rotates. A door 1a is provided at the opening of the housing 1 so as to be openable and closable. The openings of the casing 1 and the water tank 2 are connected by a flexible packing 2a. The closed door 1a is in close contact with the packing 2a to prevent laundry and washing water from spilling out of the water tank 2.

A motor 8 for rotating the drum 3 is attached to the rear surface of the water tank 2. The motor 8 is composed of a brushless DC motor, and its rotation speed can be freely changed by inverter control.

A water supply means for supplying washing water into the water tank 2 has a water supply valve 9 connected to a water supply or the like via a water supply pipe 10. The water supply pipe 10 is connected to a detergent introducing section 11 for introducing a detergent or the like. The water supply passage 12 connected to the detergent introducing unit 11 communicates with the inside of the water tank 2 at the rear of the water tank 2 via the water supply port 13. When the water supply valve 9 is opened, the tap water flowing through the water supply pipe 10 passes through the detergent introducing portion 11, passes through the water supply passage 12, and is supplied from the water supply port 13 into the aquarium 2 as washing water. The washing water collected at the bottom of the water tank 2 flows into the drum 3 through the small holes 5.

As a drainage means for draining the washing water in the water tub 2, a drainage channel 14 is connected to a drainage port 16 provided at the bottom of the water tub 2, and a drainage valve 15 and a drainage filter 17 are provided in the drainage channel 14. At the time of drainage, the drain valve 15 is opened, and the wash water in the water tank 2 flows out from the drain port 16 to the drain passage 14 and is discharged to the outside of the machine through the drain filter 17. Foreign substances such as lint and buttons separated from the laundry are collected by the drainage filter 17.

A heating chamber 18 which is recessed downward is provided in the rear bottom portion of the water tank 2. The heating chamber 18 is provided with a heater 19 for heating the wash water supplied to the water tank 2 and a water temperature sensor 20 for detecting the temperature of the wash water. Further, a water level sensor 21 for detecting the water level of the washing water and a dirt detecting means 27 for detecting dirt of the washing water are provided. As the water level sensor 21, a known sensor such as a sensor that detects a delicate pressure can be used. The dirt detecting means 27 is different depending on the type of dirt to be detected, but a known detecting means such as one for detecting turbidity by transmitting light of washing water or one for detecting dirt by electric conductivity of washing water with electrodes is used. it can.

Further, the control unit 22 is provided in the upper front portion inside the housing 1. Outside the control unit 22, an operation unit 23 for a user to set a washing operation course and the like and a display unit 24 for displaying various kinds of information are provided.

As shown in FIG. 2, the controller 22 includes an output of a water temperature sensor 20 for detecting the temperature of washing water, an output of a water level sensor 21 for detecting the amount of washing water supplied in the water tank 2, and a drum. The output of the cloth amount detecting means 25 for detecting the amount of laundry put into the inside 3, the rotation detecting means 26 for detecting the driving of the drum 3, the output of the dirt detecting means 27, etc. are input. Then, the control unit 22 controls the motor 8, the water supply valve 9, the drain valve 15, the heater 19 and the like to execute a washing operation including each process such as washing, rinsing and dehydration.

In the washing machine configured as described above, a warm water washing course that can be applied to the colored clothes of the present invention and performs sterilization with low temperature warm water will be described below.

In the entire warm water washing course, the washing step, the rinsing step 1, the rinsing step 2 and the final dehydrating step are performed in this order. As shown in FIG. 3, the washing process includes a cloth amount detection for detecting the amount of laundry put in, and a first water supply for supplying a predetermined amount of washing water according to the amount of laundry. , The first washing for rotating the drum 3 to wash the laundry by washing, the first drainage for discharging dirty washing water, the second water supply, the second washing, and the second draining process And an intermediate dehydration step of squeezing out the wash water contained in the laundry by high-speed rotation and discharging.

First, the user opens the door 1 a provided on the front surface of the housing 1 and puts the laundry into the drum 3 through the opening 6. Then, the power switch (not shown) of the operation unit 23 provided on the upper front surface of the housing 1 is turned on to set the hot water washing course, and the start switch (not shown) is operated to start the washing operation.

When the washing operation is started, the control unit 22 starts the washing process. The control unit 22 detects the amount of laundry put into the drum 3 by the cloth amount detecting means 25 as the cloth amount detection. The amount of laundry can be detected from the amount of torque applied to the motor 8 when the drum 3 is rotated and the current value of the motor 8 when the drum 3 rotates.

The control unit 22 sets the time of each step of washing, rinsing, and dehydration and the amount of washing water according to the detected amount of laundry, and also sets a predetermined amount of detergent according to the amount of laundry. It is set and displayed on the display unit 24. The user puts the detergent into the detergent feeding unit 11 according to the guideline of the amount of detergent displayed on the display unit 24. Here, in the warm water washing course of the present invention, the control unit 22 displays on the display unit 24 a detergent input amount that is twice the standard detergent input amount that has been conventionally set for the laundry amount. ..

When the user puts in detergent according to the above display and closes the door 1a, the first water supply is started. The tap water flowing from the opened water supply valve 9 through the water supply pipe 10 enters the detergent introducing section 11 and is supplied as washing water from the water supply port 13 into the aquarium 2 while melting the detergent in the detergent introducing section 11.

The washing water collected at the bottom of the water tub 2 flows into the drum 3 through the small holes 5. At this time, the drain valve 15 is closed. The amount of washing water accumulated in the water tub 2 is detected by the water level sensor 21, and when a predetermined amount of washing water preset according to the amount of laundry is supplied, the water supply valve 9 is closed.

The control unit 22 heats the wash water with the heater 19 while detecting it with the water temperature sensor 20 so that the temperature of the wash water becomes a predetermined temperature in the first washing and the second washing. Here, the predetermined temperature is preferably from 35° C. to 45° C., which has less influence on the color clothing, and particularly preferably 40° C. In this way, since the washing water is not heated to a high temperature such as 60° C., it is possible to prevent the washing time from increasing and the power consumption from increasing. Although the heater 19 heats the wash water in the drum 3, the heating may be started when the heater 19 is submerged by the water supply, or may be started when the water supply is completed.

Further, the control unit 22 executes the first washing and the second washing according to the set washing time. In these washing operations, the drum 3 is rotated by the rotation drive of the motor 8. The laundry in the drum 3 is lifted in the rotating direction by the baffle 4 and falls from the upper side, and is struck on the laundry on the lower peripheral surface of the drum 3 or in the lower portion of the drum 3. In this way, the mechanical strength of the detergent as well as the chemical strength of the detergent allows the washing to be performed by tapping.

The number of rotations of the drum 3 on which the laundry is tapped and washed is, for example, 40 rpm, and the forward rotation and the backward rotation are alternately performed every predetermined time. The control unit 22 executes the first wash and the second wash until the set wash time elapses.

The control unit 22 detects the dirt of the washing water by the dirt detecting unit 27 at a predetermined timing during the first washing and the first washing. Here, when it is determined that the amount of dirt is small, the rotation speed of the drum 3 is reduced to, for example, 20 rpm in the first washing after the time when the dirt is detected, and the operation is continued. In FIG. 3, the dirt is detected at the time when the first water supply is completed, and the first washing is performed with the rotation speed of the drum 3 being 20 rpm. When the first washing is completed, the first drainage is performed. That is, the control unit 22 opens the drain valve 15 and drains the wash water in the drum 3 via the drain passage 14.

After the first drainage is completed, the control unit 22 closes the drain valve 15 again and opens the water supply valve 9 to perform the second water supply. When the water level sensor 21 detects that the preset water level has been reached, the water supply valve 9 is closed and the water supply is stopped. Then, from the time when the water supply is completed, the second washing is performed for the set washing time. After the completion of the second washing, the second drainage is performed and the intermediate dehydration is performed. When the intermediate dehydration is finished, the washing process is finished, and the control unit 22 shifts to the rinsing process 1.

Next, the sterilization effect of the warm water washing course in the present embodiment will be described. FIG. 4 is a graph showing the bactericidal effect under various washing conditions. Including the warm water washing course in the present embodiment, the results of measuring the number of bacteria inhabiting the clothes after washing under four washing conditions are shown. The data on the left end is the initial number of bacteria before washing.

In Comparative Example 1, in the washing process, the amount of detergent was twice the standard amount usually instructed, normal temperature water (20° C.) was used, and a series of operations of water supply, washing and drainage were performed twice. is there.

In Comparative Example 2, in the washing step, the detergent amount was set to a standard amount that is usually instructed, the washing water temperature was heated to 40° C., and a series of operations of water supply, washing, and drainage were performed once.

In Comparative Example 3, a series of operations of water supply, washing and drainage were performed twice using normal temperature water (20° C.) in the washing process, using the amount of detergent as a standard amount.

The example course is the above-described warm water washing course, in which the amount of detergent is twice the standard amount, the washing water temperature is heated to 40° C., and a series of operations of water supply, washing and drainage are performed twice. ..

In the evaluation of sterilization, a suspension of Staphylococcus aureus, which is an evaluation bacterium, spread on physiological saline was dropped on a 5 cm square pre-sterilized cotton cloth, which was used as an evaluation cloth, and the evaluation cloth was fixed on a towel. Conducted a laundry course. The laundry load was 2 kg, and a commercially available liquid detergent was used as the detergent. The temperature of city water supplied to the wash water was about 20° C., and the cloth was washed with a contaminated cloth to which oleic acid was added as a coexisting stain. To count the number of bacteria inhabiting on the cloth, the evaluation cloth on which the bacterial solution was dripped was tapped into a physiological saline solution with a stomacher, the obtained suspension was spread on a medium, and it was kept at 35° C. for 24 hours. After incubation, the colony counting method was used to count the number of colonies confirmed on the medium.

As shown in FIG. 4, the number of cells inhabiting the cloth at the initial number of bacteria of 6×10E8 (CFU/mL) was 5.8×10E2 (CFU/mL) in Comparative Example 1, and Comparative Example 2 Was 9.9×10E3 (CFU/mL), and Comparative Example 3 was 2.2×10E3 (CFU/mL). On the other hand, in the course of this example, it was 3×10E1 (CFU/mL), and it was found that bacteria were sterilized from the clothing compared to the three comparative examples.

Note that, in FIG. 3, it is determined that the stain is small, and the rotation speed of the drum 3 in the first washing is controlled to decrease. In this way, the number of rotations of the drum 3 in the washing process may be changed depending on the size of the dirt. In particular, when it is determined that the dirt is small, the rotation speed of the drum 3 in the first washing may be reduced. This suppresses the generation of bubbles in the washing process that occurs when the amount of detergent input is large with respect to the dirt adhering to the clothes, and does not reduce the effect of tap washing caused by the rotation of the drum 3. It becomes possible to wash away the bacteria that live on the top, and it is possible to remove the bacteria that live on the clothes at the end of washing. The rotation speed may be reduced not only in the first washing but also in the second washing.

As described above, in the hot water washing course according to the present embodiment, the washing performance is improved by using hot water and the amount of detergent is increased, but the number of revolutions of the drum is changed by the amount of coexisting dirt components to wash by foaming. It is possible to prevent weakening of power and startup failure at the time of dehydration, wash away various bacteria inhabiting on the cloth, and eliminate the bacteria without raising the washing water temperature to a high temperature such as 60°C. As described above, by reducing the number of germs of the laundry after washing, it is possible to suppress the unpleasant odor during drying of the laundry and during use after drying.

The amount of detergent in the warm water washing course is preferably 1.5 to 2 times the amount of detergent depending on the amount of laundry in the room temperature washing course. This increases the detergent concentration in the first wash, and washing can be performed at a water temperature at which the enzymes contained in the detergent are appropriately activated, so that the washing performance can be improved and it will live on clothes. It is possible to enhance the effect of washing out various germs. Further, in the second washing as well, drainage is only performed after the first washing, so that the detergent remains in the washing water contained in the clothes, and the residual detergent is used to wash away the bacterial cells in the second washing. It is possible to enhance the effect, and it is possible to eliminate bacteria that live on clothes after washing.

Further, an automatic detergent dispenser for automatically depositing detergent into the drum 3 is provided, and the control unit 22 automatically dispenses detergent according to the set operation course and the amount of laundry detected by the cloth amount detecting means 25. You may make it throw in. As a result, the user does not have to rely on the user to dispense the detergent, the amount dispensed is accurate, and control that waits for the user's action becomes unnecessary. In addition, even if the user starts washing, he/she can leave the place and the usability is improved.

Further, in the present embodiment, the series of operations from water supply to drainage in the washing step are performed twice, but the present invention is not limited to this, and when the dirt detection unit 27 detects that the dirt is large, it is repeated. You may increase the number of times.

In the first embodiment, the drum type washing machine in which the shaft 3a of the drum 3 is configured in the horizontal direction is described, but it may be a vertical washing machine in which the shaft is configured in the vertical direction.

As described above, the washing machine according to the present invention raises the water temperature during the washing process up to about 40° C., improves the washing performance by increasing the amount of detergent added, and repeatedly performs washing with the washing water with the raised water temperature. As a result, it is possible to develop a sterilizing effect by washing away the bacteria living on the clothes at a temperature such as 60° C. or higher, so that it is possible to sterilize the colored clothes, and after washing, It is useful as a washing machine capable of suppressing the unpleasant odor derived from various bacteria generated from the clothes.

1 case 2 water tank 3 drum (washing tank)
8 Motor 9 Water Supply Valve 10 Water Supply Pipe 11 Detergent Injecting Section 12 Water Supply Channel 13 Water Supply Port 14 Drainage Channel 15 Drainage Valve 16 Drainage Port 17 Drainage Filter 18 Heating Room 19 Heater 20 Water Temperature Sensor 22 Control Unit 25 Cloth Level Detection Device 21 Water Level Sensor 26 Rotation detection means 1a Door 23 Operation part 24 Display part 27 Dirt detection means

Claims (7)

A washing tub that is rotatably installed in the aquarium,
A motor for rotating the washing tub,
Water supply means for supplying washing water to the aquarium,
Drainage means for draining the washing water of the aquarium,
Cloth amount detection means for detecting the amount of laundry put into the washing tub,
A water temperature sensor that detects the temperature of the washing water supplied to the aquarium,
A heater that heats the washing water,
An operation unit for the user to select the course of washing operation,
A display unit that displays various information,
It is equipped with a control unit that controls the washing operation that performs each process of washing, rinsing, and dehydration,
In the setting of the washing process, the control unit has a room temperature washing course in which the heater does not heat the washing water and a warm water washing course in which the heater heats the washing water, and the washing amount detected by the cloth amount detecting means. In a washing machine that sets the amount of detergent according to the amount of items,
In the washing process of the warm water washing course, the control unit sets the detergent amount according to the amount of laundry to be larger than the detergent amount according to the amount of laundry in the room temperature washing course, and displays it on the display unit. A washing machine which carries out a series of operations of supplying water by the water supply means, washing in which the washing tub is driven to rotate and draining water by the drainage means, a plurality of times after the detergent is added. Equipped with a dirt detection unit that detects dirt in washing water,
The washing machine according to claim 1, wherein the control unit changes the number of rotations of the washing tub in the washing step in the warm water washing course according to the size of dirt. The laundry according to claim 2, wherein the number of rotations of the washing tub in the first first wash in the series of operations is lower when it is determined that the stain is smaller than when it is determined that the stain is large. Machine. The rotation number of the washing tub in the first washing of the first time in the series of operations is lower than the rotation number of the washing tub in the second washing of the second time when it is determined that the dirt is small. Or the washing machine according to item 3. The washing machine according to any one of claims 1 to 4, wherein the amount of detergent in the warm water washing course is 1.5 to 2 times the amount of detergent depending on the amount of laundry in the room temperature washing course. The said control part is a washing machine in any one of Claims 1-5 which controls the water temperature of the washing water in the said warm water washing course in the range of 35 degreeC-45 degreeC. Equipped with a detergent automatic charging device for automatically charging detergent into the water tank,
The said control part is a washing machine of any one of Claims 1-6 which inputs a detergent according to the set driving course and the amount of the laundry detected by the said cloth amount detection means.

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