JP2020081497A - Washing machine - Google Patents

Abstract

To provide a washing machine capable of reducing generation of half-dry smell due to hanging laundry inside a room, by shortening the drying time of laundry.SOLUTION: A washing machine 1 includes a control part 14 for controlling a washing step, a rinsing step and a dewatering step of laundry. In the rinsing step, at least a water supply procedure, a rinsing procedure and a draining procedure are performed in this order for a plurality of times. In the rinsing step, the control part 14 controls in such a manner that the final rinsing procedure is performed using hot water in a predetermined temperature range, and is performed spending longer time than the rinsing time of other rinsing procedures before the final rinsing procedure.SELECTED DRAWING: Figure 6

Description

The present invention relates to a washing machine that uses warm water in a rinsing process.

In recent years, washing machines equipped with various functions have been developed. For example, there is one that is equipped with a heater and warms washing water or rinsing water to perform washing.
Patent Document 1 discloses a washing machine with a drying function. This washing machine uses warm water in the rinsing process in order to shorten the drying time due to the drying function.
Patent Document 2 also discloses a washing machine that uses warm water in the rinsing step. This washing machine enhances rinsing performance by using hot water, and also reduces power consumption by spraying hot water in a shower shape.

Japanese Patent No. 3880881 JP, 2017-403, A

If the technique described in Patent Document 1 is used, it is expected that the drying time by the drying function will be shortened, but some washing machines do not have the drying function. In addition, even if the user has a washing machine with a drying function, some users do not normally use the drying function from the viewpoint of being charged for electricity, and those who dry the laundry by hanging it on a clothes line or a hanger. There is also.
On the other hand, when the laundry is dried in the room, molds and other bacteria adhering to the laundry are propagated, and an unpleasant odor (so-called dry odor) may be generated from the laundry.
Generally, as a measure against the dry odor caused by drying in the room, laundry detergent with strong detergency or a fragrance softening agent that eliminates odors is used, but it is used because some users are not good at smelling a fragrance softening agent. There is a strong demand to reduce the dry odor when dried in the room, regardless of laundry detergent or aromatic softener.

Therefore, it is an object of the present invention to provide a drum type washing machine that can reduce the generation of fresh-dry odor when the room is dried by shortening the drying time of the laundry.

The washing machine of the present invention is a washing machine including a control section for controlling a washing step of laundry, a rinsing step and a dehydrating step, wherein the rinsing step repeats at least a water supply procedure, a rinsing procedure and a draining procedure a plurality of times. The controller, in the rinsing step, performs the final rinsing procedure using warm water in a predetermined temperature range, and the rinsing time is longer than the rinsing time of other rinsing procedures before the final rinsing procedure. Control to do.

In the washing machine of the present invention, warm water is used for the final rinsing procedure, and the rinsing is performed for a longer time than usual, thereby shortening the drying time due to room drying. This makes it possible to suppress the generation of raw dry odor regardless of the type of laundry detergent or the like.

It is a perspective view showing appearance of drum type washing machine 1 concerning this embodiment. It is sectional drawing of the drum type washing machine 1. It is an enlarged view of the operation panel 7. It is a block diagram which shows the functional structure of the drum type washing machine 1. It is a flowchart which shows operation|movement of a room drying course. It is a time table showing required time of each process performed in a standard course, a room drying 40°C course, and a room drying 50°C course. It is a flow chart which shows operation of the final rinse procedure. It is a flow chart which shows operation of the 1st rinse processing. It is a flow chart which shows operation of the 2nd rinse processing. It is a figure for demonstrating the temperature control and motor control performed in a room drying course. (A) A graph for explaining temperature control and motor control when the water temperature is higher than 15°C. (B) It is a figure for demonstrating temperature control and motor control when water temperature is less than 15 degreeC. It is a figure for demonstrating the effect of the drum type washing machine 1 which concerns on this embodiment.

<Outline>
A washing machine according to one aspect of the embodiment is a washing machine including a control unit that controls a washing step, a rinsing step, and a dehydrating step of laundry, wherein the rinsing step includes at least a water supply procedure, a rinsing procedure, and a draining procedure. Repeated a plurality of times, the control unit performs the final rinsing procedure in the rinsing step using hot water in a predetermined temperature range, and the rinsing time is longer than the rinsing time of other rinsing procedures before the final rinsing procedure. Control to do so over time.

In the washing machine according to another aspect of the embodiment, in the rinsing step, the control unit performs a final rinsing procedure using hot water in a predetermined temperature range, and a rinsing time before the final rinsing procedure. It is controlled so that it takes more than twice as long as the rinse time of the procedure. Thus, by using warm water for the final rinsing procedure and further rinsing for a longer time than usual, it is possible to shorten the drying time due to room drying. This makes it possible to suppress the generation of raw dry odor regardless of the type of laundry detergent or the like.
In the washing machine according to another aspect of the embodiment, the temperature range of the hot water used in the final rinsing procedure is 30°C to 60°C. This makes it possible to select hot water at an appropriate temperature according to the type of laundry (clothing) such as the characteristics of the cloth.

In the washing machine according to another aspect of the embodiment, in the rinsing step, before the final rinsing procedure, a water supply procedure, a rinsing procedure, a drainage procedure, and a dehydration procedure are performed at least one or more times, and the control unit controls the final rinsing procedure. The dehydration time of the dehydration step performed after the rinse procedure is controlled to be longer than the dehydration time of the dehydration procedure performed after the other rinse procedure. As described above, by performing the dehydration process for a long time, it is possible to shorten the drying time by drying the room.
In the washing machine according to another aspect of the embodiment, the control unit controls the dehydration step to be performed for 10 minutes to 25 minutes after the final rinsing procedure. In this way, by performing the dehydration process for 10 to 25 minutes, which is longer than the dehydration process performed in a general washing machine, it is possible to shorten the drying time by drying the room.

A washing machine according to another aspect of the embodiment uses a washing tub, a rotating drum that is installed inside the washing tub and stores laundry, and water supplied to the washing tub in the final rinsing procedure. A temperature raising means for raising the temperature to the temperature range, wherein the controller raises the water supplied to the washing tub to the temperature range by the temperature raising means, and then agitates the laundry for 10 minutes or more. Control to do. In this case, hot water can be used for the final rinsing procedure even when there is no water heater or the like capable of supplying hot water at the place where the washing machine is installed. Further, by stirring the laundry over a period of time after raising the temperature of the rinse water supplied, it is possible to uniformly perform stirring and hot water infiltration.

In the washing machine according to another aspect of the embodiment, the control unit controls the rotating drum to cyclically perform a rotating and a non-rotating operation in the final rinsing procedure, and the temperature increasing unit controls the temperature increasing unit. While the water supplied to the washing tub is raised to the temperature T1 included in the temperature range, the rotating time and the non-rotating time of the rotary drum are substantially the same, and the temperature raising means is installed in the washing tub. After the supplied water is heated to the temperature T1, until the hot water of the temperature T1 reaches the temperature T2 (<T1) included in the temperature range, the rotation time of the rotary drum is more than the non-rotation time. Is also long. Thereby, the temperature of the rinse water can be raised while suppressing the temperature unevenness between the clothes.

In the washing machine according to another aspect of the embodiment, in the final rinsing procedure, the control unit controls the rotating drum to periodically perform a rotating and a non-rotating operation, and the temperature raising unit is configured to While the water supplied to the washing tub is raised to the temperature T4 included in the temperature range, the rotating time and the non-rotating time of the rotating drum are substantially the same, and the temperature raising means is installed in the washing tub. After raising the supplied water to the temperature T4, while the temperature raising means further raises the warm water of the temperature T4 to the temperature T3 (>T4) included in the temperature range, and while the warm water of the temperature T3 is kept at the temperature T4. Until then, the rotation time of the rotary drum is longer than the non-rotation time. Thereby, the temperature of the water in the washing tub can be raised while suppressing the temperature unevenness between the clothes. For example, when the temperature of tap water is low, such as in winter, by controlling the rotation and non-rotation of the rotating drum in this manner, it is possible to more effectively suppress temperature unevenness between clothes.

In the washing machine according to another aspect of the embodiment, after the dehydration step, the control unit causes the rotating drum to alternately perform forward rotation and reverse rotation in a low cycle, and perform the forward rotation and the reverse rotation. Control so that each is performed at low speed. As a result, it is possible to reduce the wrinkles of the clothes due to the long dehydration process.

A washing machine according to another aspect of the embodiment includes an operation input unit that receives a selection of one laundry course from a plurality of types of laundry courses from a user, and the plurality of types of laundry courses have a final rinsing procedure at room temperature. A standard course with water and a final rinsing procedure with warm water, and a long rinsing time compared to the rinsing time of the final rinsing procedure with the standard course. And a room drying course in which the time of the dehydration step performed after the rinsing procedure is longer than that of the dehydration step performed after the final rinsing procedure performed in the standard course. In this case, when the room drying course is selected by the operation input unit, the drying time due to the room drying can be shortened by performing the control different from the standard course. This makes it possible to suppress the generation of raw dry odor regardless of the type of laundry detergent or the like.

<Embodiment>
1. Configuration of Drum Type Washing Machine A configuration of a drum type washing machine (hereinafter referred to as a washing machine) will be described with reference to FIGS. 1 and 2.
The washing machine 1 is called a horizontal drum washing machine. The washing machine 1 includes a housing 2, a washing tub 3, a rotating drum 4 which is stored in the washing tub 3 and into which laundry such as clothes is put, and a door 6 which opens and closes an opening of the washing tub 3. There is.

As shown in FIG. 1, the housing 2 has a box shape, and an opening for loading laundry into the rotary drum 4 is formed in a substantially central portion of the front panel 2a. Further, the front panel 2a includes an operation panel 7 and a detergent input case 8. Details of the operation panel 7 will be described later.
The washing tub 3 is elastically vibration-proofed in the housing 2 and has an opening 3c on the front surface. As shown in FIG. 2, the portion forming the opening 3c includes a folded portion that is circularly folded outward. The washing tub 3 is divided into a front portion 3a and a rear portion 3b, which are connected to each other to have a bottomed cylindrical shape. The washing tub 3 shown in FIG. 2 has a central axis arranged horizontally, but it may be arranged so as to be slightly lowered and inclined from the front to the rear. In the description of the washing tub 3, the rear side of the washing tub 3 in the horizontal state is the bottom side.

A motor 10 for rotating the rotating drum 4 around the rotating shaft 10a is provided at the center of the bottom surface of the washing tub 3. A heater insertion port is provided on the bottom surface of the washing tub 3, and a heater 11 for heating the water supplied to the washing tub 3 is inserted into the heater insertion port. Here, as the heater 11, a sheathed heater excellent in heat conduction and waterproofed is used. As an example, the power consumption of the heater 11 is 800 W, and it takes 2.6 minutes to raise the temperature of the water supplied to the washing tub 3 by 1°C. A water temperature sensor 12 for measuring the temperature of water in the washing tub 3 is provided in the vicinity of the heater 11 or in the vicinity of the heater 11.

The rotating drum 4 has a cylindrical shape with a bottom, is connected to a motor 10 provided at the bottom of the washing tub 3, and is rotatably supported in the washing tub 3. The central axis of rotation of the rotating drum 4 coincides with the central axis of the washing tub 3.
The laundry is stored in the cylindrical portion 4b of the rotating drum. The opening 4a of the rotary drum 4 is smaller than the inner diameter of the cylindrical portion 4b. A plurality of through holes 4c for passing water are formed in the peripheral wall of the cylindrical portion 4b. Through the through hole 4c, washing water and rinse water can freely flow between the washing tub 3 and the rotary drum 4.

The door 6 is provided in the housing 2 so as to be openable and closable. The door 6 is openably and closably supported by a hinge provided on the front panel 2a of the housing 2 and extending in the vertical direction.
The door 6 has a double structure including an outer transmissive window 6a formed of translucent glass or a transmissive resin and an inner light transmissive convex portion 6b. The bottom portion of the light-transmitting convex portion 6b is provided with an abutting portion with which the gasket 5 is in close contact. The door 6 can see the state of the laundry in the rotary drum 4 from its translucent window.

A gasket 5 is provided between the opening of the washing tub 3 and the door 6. The gasket 5 is made of an elastic material, for example, a rubber material. As shown in FIG. 2, the gasket 5 has a cylindrical shape, and one end side of the cylindrical shape is fixed to a front end portion of the washing tub 3 on the opening 3c side. The other end of the cylinder is in contact with (close contact with) the door 6. The gasket 5 absorbs vibrations during washing and dehydration, and has a waterproof function and a vibration-proof function for the housing 2. Here, the gasket 5 is provided with a concave portion 5a that projects outward in the radial direction in order to facilitate expansion and contraction of the cylinder in the length direction and to easily absorb vibration.

As shown in FIG. 3, the operation panel 7 includes a power button 7a, a start button 7b, a course selection dial 7c, and a setting display section 7d.
The power button 7a is a button for turning on and off the power of the washing machine 1. The start button 7b is a button for starting and temporarily stopping the operation of the washing machine 1. The course selection dial 7c is a dial for setting a laundry course desired by the user from a plurality of laundry courses. Here, the course selection dial 7c has a course lamp associated with each course. The setting display unit 7d sets the washing conditions, the washing time, etc., and displays the setting conditions and the status of the washing process.
The courses that the user can set in the washing machine 1 include, for example, a standard course, a hand-washing course, an elaborate course, and a rush course. In addition to these, it is possible to set a room drying course that is a feature of the present embodiment. Is becoming

The room drying course is, for example, from two courses, a "room drying 40°C course" that uses warm water of about 40°C for the final rinse and a "room drying 50°C course" that uses warm water of about 50°C for the final rinse. You can choose. In the room drying course, it is possible to shorten the drying time after washing by using warm water of 40° C. or 50° C. for the final rinse.
For example, when setting the room drying 50° C. course, the user first presses the power button 7a and then turns the course selection dial 7c to select the room drying about 50° C. rinsing. At this time, the course lamp at the position corresponding to "about 50° C. rinse" is turned on. After that, if the start button 7b is pressed, the washing of the room drying 50°C course is started.

2. Functional Configuration of Washing Machine 1 Inside the housing 2, on the back side of the operation panel 7, there is provided a control unit 14 housed in a waterproof case (not shown). FIG. 4 is a functional block diagram showing a functional configuration of the washing machine 1 including the control unit 14.
The washing machine 1 includes an operation panel 7, a heater 11, a water temperature sensor 12, a storage unit 13, a control unit 14, a motor drive unit 15, a water level sensor 16, a timer 17, a voice output unit 18, a water supply control unit 19, and a drainage control unit 20. And a door lock device 21.
The storage unit 13 includes an EEPROM, a RAM and the like. The storage unit 13 stores a computer program for performing the steps included in various laundry courses. The storage unit 13 also stores various parameters and various control flags used for executing the computer program.

The control unit 14 is configured by a microcomputer and controls the entire washing machine 1 by executing a computer program stored in the storage unit 13.
The motor drive unit 15 drives the motor 10 according to the control signal from the control unit 14. The motor drive unit 15 includes a rotation sensor that detects the rotation speed of the motor 10, an inverter circuit, and the like, and adjusts the drive power so that the motor 10 rotates at the target rotation speed set by the control unit 14. In addition, when the room drying course is selected, the motor driving unit 15 performs first motor control and second motor control described below according to the control signal from the control unit 14. The motor drive unit 15 also calculates the weight of the laundry stored in the washing tub 3 by detecting the load of the motor 10.
The water level sensor 16 detects the water level of the wash water and rinse water in the washing tub 3 and outputs a water level detection signal corresponding to the detected water level to the control unit 14.

When the user operates various buttons, the course selection dial 7c, and the setting display unit 7d, the operation panel 7 outputs an input signal corresponding to the operated button or dial to the control unit 14. The voice output unit 18 outputs a voice such as a buzzer sound for notifying the user of the end of washing or the occurrence of an error in accordance with a control signal from the control unit 14.
The water supply controller 19 controls opening/closing of a water supply valve (not shown) according to a control signal from the controller 14. The drainage control unit 20 controls opening/closing of a drainage valve (not shown) according to a control signal from the control unit 14. The door lock device 21 locks and unlocks the door 6 according to a control signal from the control unit 14.

3. Detailed Description of Room Drying Course Here, details of the room drying course will be described with reference to FIGS. 5 to 11.
(1) Overall Operation of Room Drying Course FIG. 5 is a flowchart showing the operation of the room drying course. This operation is executed when the user uses the operation panel 7 to set a room drying 40° C. course or a room drying 50° C. course and presses the start button 7b.
As shown in the figure, in the room drying course, the washing machine 1 performs a water supply procedure of supplying washing water to the washing tub 3 (step S1), then a washing procedure (step S2), and a drainage procedure (step S3). ) And a dehydration procedure (step S4). The steps S1 to S4 are referred to as “washing step”. Subsequently, the washing machine 1 performs the water supply procedure (step S5), the rinse procedure 1 (step S6), the drainage procedure (step S7), and the dehydration procedure (step S8) in this order. Steps S5 to S8 are referred to as a "first rinse step".

Subsequently, the washing machine 1 performs the water supply procedure (step S9), the rinse procedure 2 (step S10), the drainage procedure (step S11), and the dehydration procedure (step S12) in this order. Steps S9 to S12 are referred to as a "second rinse step".
Subsequently, the washing machine 1 performs the water supply procedure (step S13), the final rinsing procedure (step S14), and the draining procedure (step S15) in this order. In the final rinsing procedure, the rinsing water supplied to the washing tub 3 by the water supplying procedure is agitated by using warm water heated to about 40°C or about 50°C. Steps S13 to S15 are referred to as "final rinsing step".
Next, the washing machine 1 performs a dehydration process (step S16), and finally performs a wrinkle removing process (step S17). In the wrinkle removing process, in order to reduce the wrinkles of the clothes due to the dehydrating process, the normal rotation and the reverse rotation of the motor 10 are repeated at a low cycle of about 46 rpm for 3 minutes. This makes it easier to loosen the clothes and reduces the sticking of the cloth which causes wrinkles.
As described above, the room drying course includes a plurality of rinsing steps, and in the final rinsing procedure, rinsing (stirring) is performed using warm water.

(2) Timetable FIG. 6 is a timetable 100 showing the processing time of each step and each procedure described in FIG. Here, in addition to the room drying 40° C. course and the room drying 50° C. course, the processing time of the standard course is also shown for comparison.
As shown in the timetable 100, the room drying 40° C. course performs the rinsing procedure included in the final rinsing step for 73 minutes, and the room drying 50° C. course performs the rinsing procedure included in the final rinsing step for 93 minutes. This is 20 times or more longer than the 3 minutes of the rinse procedure 1 and the rinse procedure 2 included in the first and second rinse steps. Also, the time is 20 times or more longer than that of the standard course rinsing procedure.
Further, the room drying course differs from the standard course in that, in addition to the rinsing step, the standard course performs the dehydration step for 10 minutes, whereas the room drying course performs the dehydration step for 20 minutes.

It is considered that the drying time after the dehydration is shortened because the dehydration rate of the laundry is increased by performing the dehydration process for a long time. However, in reality, as the dehydration rate increases, the temperature of clothes tends to decrease, and as a result, the drying time tends to increase. Therefore, in the room drying course of the present embodiment, the dehydration step is performed for 20 minutes as a suitable time period in which the temperature of the clothes can be suppressed by raising the temperature of the clothes by using warm water and increasing the dehydration rate. Thereby, the drying time after dehydration can be shortened.
In general, the laundry is likely to be biased inside the washing tub 3, and unevenness in rinsing and dehydration is likely to occur. However, in the room drying course of the present embodiment, by performing stirring using warm water for a long time in the final rinsing procedure, and by performing a long-time dehydration process, even if the laundry is biased, The rinse rate and dehydration rate are less likely to be uneven. Further, by using warm water and improving the dehydration rate, the sticking of clothes to each other is reduced, and wrinkles can be suppressed.

(3) Operation of Final Rinse Procedure Next, details of the final rinse procedure will be described. FIG. 7 is a flowchart showing details of step S14 in FIG. As shown in the figure, the water temperature sensor 12 measures the water temperature T of the rinse water supplied to the washing tub 3 (step S21).
When the water temperature T is higher than 15° C. (Y in step S22), the washing machine 1 performs the first rinsing process (step S23). When the water temperature T is 15° C. or lower (N in step S22), the washing machine 1 performs the second rinsing process (step S24).

(4) Detailed Operation of First Rinsing Process Next, details of the first rinsing process will be described. FIG. 8 is a flowchart showing details of step S23 in FIG. The table 200 in FIG. 10 describes each value used in the first rinsing process and the second rinsing process.
The controller 14 turns on the heater 11 (step S31) and starts heating the rinse water supplied to the washing tub 3. Next, the water temperature sensor 12 measures the water temperature T of the supplied rinse water (step S32) and outputs the measured water temperature T to the control unit 14.
The controller 14 compares the water temperature T with a preset temperature T1. Here, as shown in FIG. 10, T1=43° C. for the 40° C. course and T1=53° C. for the 50° C. course. When T<T1 (N in step S33), the control unit 14 instructs the motor driving unit 15 to perform the first motor control, and controls the rotation and non-rotation of the motor 10 (step S34). Here, as shown in FIG. 10, in the first motor control, the motor 10 repeats the operation of 7 seconds of rotation/7 seconds of non-rotation (stop).

After that, the process returns to step S32, and the processes from step S32 to step S34 are repeated periodically, for example, every 10 seconds.
When the temperature of the supplied rinse water rises and T≧T1 (Y in step S33), the process proceeds to step S35, and the control unit 14 turns off the heater 11 (step S35). After that, the control unit 14 instructs the motor driving unit 15 to perform the second motor control, and changes the rotation and non-rotation times of the motor 10 (step S36). Here, as shown in FIG. 10, in the second motor control, the motor 10 repeats the operation of rotating for 20 seconds/non-rotating for 4 seconds.

Next, the water temperature sensor 12 measures the water temperature T of the supplied rinse water (step S37) and outputs the measured water temperature T to the control unit 14.
The control unit 14 compares the water temperature T with a preset temperature T2. Here, as shown in FIG. 10, T2=40° C. for the 40° C. course, and T2=50° C. for the 50° C. course. When T>T2 (N in step S38), the process returns to step S36, and the processing from step S36 to step S38 is repeated periodically, for example, every 10 seconds. After that, when T≦T2 (Y in step S38), the process ends.

(5) Detailed Operation of Second Rinse Processing Next, details of the second rinse processing will be described with reference to FIG. 9. FIG. 9 is a flowchart showing details of step S24 in FIG.
The controller 14 turns on the heater 11 (step S41) and starts heating the rinse water supplied to the washing tub 3. Next, the water temperature sensor 12 measures the water temperature T of the supplied rinse water (step S42) and outputs the measured water temperature T to the control unit 14.

The controller 14 compares the water temperature T with a preset temperature T4. Here, as shown in FIG. 10, in the case of the 40° C. course, T4=35° C., and in the case of the 50° C. course, T4=45° C. When T<T4 (N in step S43), the control unit 14 instructs the motor driving unit 15 to perform the first motor control, and controls the rotation and non-rotation of the motor 10 (step S44). As shown in FIG. 10, in the first motor control, the motor 10 repeats the operation of rotating 7 seconds/non-rotating 7 seconds similarly to the first rinsing process.
After that, the process returns to step S42, and the processing from step S42 to step S44 is repeated periodically, for example, every 10 seconds.
When the water temperature of the supplied rinse water rises and T≧T4 (Y in step S43), the control unit 14 instructs the motor driving unit 15 to perform the second motor control, and causes the motor 10 to rotate and not rotate. The rotation time is changed (step S45). As shown in FIG. 10, during the second motor control, the motor 10 repeats the operation of rotating for 20 seconds/non-rotating for 4 seconds, similarly to the first rinsing process.

Next, the water temperature sensor 12 measures the water temperature T of the supplied rinse water (step S46) and outputs the measured water temperature T to the control unit 14.
The control unit 14 compares the water temperature T with a preset temperature T3. Here, as shown in FIG. 10, T3=38° C. for the 40° C. course, and T3=48° C. for the 50° C. course. If T<T3 (N in step S47), the process returns to step S45, and the processing from step S45 to step S47 is repeated periodically, for example, every 10 seconds. When the temperature of the rinse water further rises and T≧T3 (Y in step S47), the control unit 14 turns off the heater 11 (step S48). After that, the control unit 14 instructs the motor driving unit 15 to continue the second motor control, and controls the rotation and non-rotation of the motor 10 (step S49).

Next, the water temperature sensor 12 measures the water temperature T of the supplied rinse water (step S50) and outputs the measured water temperature T to the control unit 14.
The control unit 14 compares the water temperature T and the temperature T4. When T>T4 (N in step S51), the process returns to step S49, and the processing from step S49 to step S51 is repeated periodically, for example, every 10 seconds. After that, if T≦T4 (Y in step S51), the process ends.
FIG. 11A is a diagram showing changes in the temperature of the rinse water in the first rinse process, the elapsed time of the rinse time, and the switching timing of the motor control. FIG. 11B is a diagram showing the temperature change of the rinse water in the second rinse process, the elapsed time of the rinse time, and the switching timing of the motor control.

In the room drying course, the rinse water supplied to the washing tub 3 is heated by the heater 11, but it takes time to raise it to about 40° C. or about 50° C. Meanwhile, the washing machine 1 performs the first motor control to perform the rinsing process while stirring the laundry. Then, after the water temperature rises to a certain degree, the second motor control is changed so that the motor rotation time becomes longer, thereby suppressing the temperature unevenness between the clothes.
The second motor control is an important step of raising the temperature of the laundry with a low temperature unevenness. The time for the second motor control is preferably 10 minutes or longer, more preferably 20 minutes or longer. The first motor control time is the time required to heat the rinse water supplied to the washing tub 3 to raise it to about 40° C. or about 50° C. It also depends on the characteristics. The time for the first motor control can be shortened by replacing the heater 11 with a heater for higher power.
4. Effect of Room Drying Course The table 300 shown in FIG. 12 represents the time lapse and the drying rate of the laundry when the laundry is dried in the room after the room drying 50° C. course is executed. The table 400 represents the elapsed time and the drying rate of the laundry when the laundry is dried in the room after the standard course is executed.

In each case, the respective drying rates and the average values thereof when executed twice are described. The drying rate (%) here is indicated by the weight of only the clothes when the weight of the entire laundry (total of clothes and water) is 100. When the drying rate is 92% or more, it can be determined that the laundry is dry. Therefore, the shorter the time until the drying rate becomes 92% or more, the more the generation of raw dry odor can be suppressed.
As shown in Table 300, in the room drying 50° C. course, the drying rate becomes 92.8% 5 hours after the room drying starts, and the drying rate becomes 94.8% 6 hours later. On the other hand, as shown in Table 400, in the case of the standard course, it takes 8 hours for the drying rate to reach 92.4% and 9 hours for the drying rate to reach 94.4%.
As described above, in the room drying course of the present embodiment, the final rinsing procedure using warm water is performed for a long time, and the dehydration process is also performed for a long time to improve the dehydration rate of laundry at the end of washing. You can Since the laundry is warm at the time of starting to dry it and the dehydration rate is high, the laundry dries for 2 to 3 hours faster than the conventional standard course. Therefore, the propagation of various bacteria can be suppressed, and the generation of raw dry odor can be suppressed.

Further, as shown in FIG. 6, the room drying course requires a longer course operation time than the standard course in the final rinsing procedure and the dehydration process. However, since the drying time is greatly shortened, the total time required from the start of washing to the drying is shorter in the room drying course.
Specifically, the room-dried 40°C course has a longer course operation time of about 1 hour and 20 minutes, but a shorter drying time of about 2 hours than the standard course. As a result, the total time is reduced by 40 minutes. Compared to the standard course, the room-dried 50°C course has a longer course operation time of about 1 hour 40 minutes, but a shorter drying time of about 3 hours. As a result, the total time is reduced by 1 hour and 20 minutes.

4. Modified Example Here, a modified example of the embodiment will be described. The present invention is not limited to the above embodiment, and the following cases are also included in the present invention.
(1) In the above-described embodiment, the washing machine 1 is provided with the heater 11, and the rinse water used in the final rinsing procedure is heated by the heater 11. However, instead of the heater 11, it is different from the washing machine 1. A configuration using a body warm water generator may be used.
Alternatively, the hot water used for the final rinsing procedure may be supplied from an external water supplier (water heater or the like). In this case, if hot water is generated in advance and hot water is prepared before the washing machine 1 enters the final rinsing procedure, the washing time described in the above embodiment can be shortened. ..
Moreover, when using a hot water generator, an external water heater, or the like, it is desirable that the washing machine 1 be provided with a hot water storage unit for temporarily storing rinse water. This facilitates adjustment of the temperature and amount of hot water used in the final rinsing procedure.

(2) In the final rinse procedure, the amount of water used may be larger than in the other rinse procedures. Thereby, the agglomeration of the laundry can be suppressed and the hot water infiltration effect can be enhanced.
(3) The washing machine 1 of the above embodiment selects the first rinsing treatment or the second rinsing treatment depending on whether the water temperature T is 15° C. or lower or higher than 15° C. in the final rinsing procedure. It was configured to run. However, this configuration is an example. In the final rinsing procedure performed by the washing machine 1, the rotation/non-rotation (stop) cyclic operation of the motor 10 may be constant regardless of the water temperature T.
(4) Further, the boundary value of the water temperature after the water supply when selecting the first rinsing treatment or the second rinsing treatment is not limited to 15°C. Further, two or more boundary values may be used to determine the rinse process to be executed. As an example, 10° C. and 20° C. may be used as the boundary values, and the three first to third rinsing processes may be selectively executed.

(5) The conditions of the final rinsing procedure may be changed depending on the water temperature after water supply. For example, when the water temperature is high, the rinsing time may be shortened.
(6) The time required for the final rinsing procedure was 73 minutes for the 40° C. course and 93 minutes for the 50° C. course, but this is an example and is not limited to this time. The final rinsing procedure in the present invention may be carried out by taking several times as long as the time required for the normal rinsing procedure. As an example of several times, from the viewpoint of improving the rinsing rate and shortening the drying time, the range of 2 to 35 times is preferable.
Two room drying courses, a 40°C course and a 50°C course, are provided, but this is an example, and there is no limitation to these two courses, and one course may be used. There may be 3 or more courses.
Furthermore, the temperature setting is not limited to 40° C. and 50° C., and may be 30° C. or 60° C., or may be set more finely. However, considering the temperature of the laundry when it is taken out of the washing machine and the damage of the laundry during washing, it is preferable that the temperature is in the range of 30 to 60°C.
When the temperature of the rinse water reaches the set value of 40° C. or 50° C., the heater 11 is turned off, but the heater 11 may be weakened (the heating amount is small) to continue heating.

(7) The dehydration process of the room drying course was performed for 20 minutes, which is twice as long as usual, but this is an example. The washing machine 1 may be configured such that the dehydration process is performed for the same time as the normal course. However, in consideration of shortening the drying time when the room is dried and damage to the laundry, the range of 15 minutes to 25 minutes is preferable.
Further, the wrinkle removing step after dehydration performed in the above-described embodiment is an option and is not an essential step. Further, the wrinkle removing process described in the above embodiment is a process of repeatedly performing the normal rotation and the reverse rotation of the motor 10 at a low cycle of about 46 rpm for 3 minutes, but the rotation speed and the rotation time of the motor 10 are also the same. It is not limited to.

(8) The first motor control and the second motor control described with reference to FIGS. 10 and 11 are examples. In both the first motor control and the second motor control, the ON (rotation)/OFF (non-rotation) time cycle of the motor 10 is not limited to this value.
(9) As described with reference to FIG. 11, the first motor-motor control and the second motor-control in the final rinsing procedure of the embodiment include the first warm water period (normal temperature→minimum set value) and the second warm water period. Includes (minimum set value→highest set value) and third warm water period (highest set value→minimum set value). The first warm water period is mainly for stirring rinse water, and the second warm water period and the third warm water period are mainly for warm water infiltration into the laundry.
Here, in the above embodiment, the first warm water period, the second warm water period and the third warm water period are each performed once, but after the first warm water period, the second warm water period and the third warm water period are performed. The period may be repeated multiple times.
(10) The present invention can be applied to a drum type washer/dryer and a vertical type washing machine other than the drum type.
(11) The above embodiments and modifications may be combined.

1 washing machine (drum type washing machine)
2 Housing 3 Washing tub 4 Rotating drum 5 Gasket 6 Door 7 Operation panel 8 Detergent input case 10 Motor 11 Heater 12 Water temperature sensor 13 Storage unit 14 Control unit 15 Motor drive unit 19 Water supply control unit 20 Drainage control unit 21 Door lock device

Claims (10)

A washing machine having a control unit for controlling a washing process, a rinsing process and a dehydrating process of laundry,
In the rinsing step, at least a water supply procedure, a rinsing procedure and a draining procedure are repeated a plurality of times,
In the rinsing step, the control unit performs the final rinsing procedure using warm water in a predetermined temperature range, and the rinsing time is longer than the rinsing time of other rinsing procedures before the final rinsing procedure. Control the washing machine. In the rinsing step, the control unit performs the final rinsing procedure using warm water in a predetermined temperature range, and the rinsing time is twice or more as long as the rinsing time of other rinsing procedures before the final rinsing procedure. The washing machine according to claim 1, wherein the washing machine is controlled so as to take time. The washing machine according to claim 1 or 2, wherein a temperature range of hot water used in the final rinsing procedure is 30°C to 60°C. In the rinsing step, before the final rinsing procedure, a water supply procedure, a rinsing procedure, a draining procedure, and a dehydration procedure are performed at least once or more,
The control unit controls the dehydration time of the dehydration step performed after the final rinse procedure to be longer than the dehydration time of the dehydration procedure performed after the other rinse procedure. The washing machine according to any one of 3 above. The washing machine according to claim 4, wherein the control unit controls the dehydration step to be performed for 10 to 25 minutes after the final rinsing procedure. The washing machine is
A washing tub,
A rotating drum that is attached to the inside of the washing tub and stores laundry,
The temperature of the water supplied to the washing tub is increased to the temperature range used in the final rinsing procedure,
The control unit controls the heating unit to stir the laundry for 10 minutes or more after the temperature of the water supplied to the washing tub is raised to the temperature range. The washing machine according to any one of claims. In the final rinsing procedure, the control unit controls the rotary drum to periodically perform a rotating and non-rotating operation,
While the temperature raising unit raises the water supplied to the washing tub to the temperature T1 included in the temperature range, the rotation time and the non-rotation time of the rotary drum are substantially the same,
After the temperature raising means raises the water supplied to the washing tub to the temperature T1, until the hot water of the temperature T1 reaches the temperature T2 (<T1) included in the temperature range, The washing machine according to claim 6, wherein the rotation time is longer than the non-rotation time. In the final rinsing procedure, the control unit controls the rotating drum to periodically perform rotating and non-rotating operations,
While the temperature raising means raises the water supplied to the washing tub to the temperature T4 included in the temperature range, the rotation time and the non-rotation time of the rotary drum are substantially the same.
After the temperature raising means raises the water supplied to the washing tub to the temperature T4, while the temperature raising means further raises the hot water of the temperature T4 to the temperature T3 (>T4) included in the temperature range, The washing machine according to claim 6, wherein the rotation time of the rotary drum is longer than the non-rotation time until the hot water at the temperature T3 reaches the temperature T4. After the dehydration step, the control unit controls the rotating drum to alternately perform forward rotation and reverse rotation in a low cycle, and perform the forward rotation and the reverse rotation at low speeds. 9. The washing machine according to claim 8. The washing machine is
An operation input unit that accepts a selection of one laundry course from a plurality of types of laundry courses from the user is provided.
The plurality of types of washing courses are a standard course in which a final rinsing procedure is performed using water at room temperature, and a final rinsing procedure is performed using warm water, and a rinsing time is a final rinsing procedure performed in the standard course. The time of the dehydration step performed after the final rinse procedure is longer than the time of the final rinse procedure performed in the standard course. The washing machine according to claim 1, further comprising a room drying course that is performed over time.

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