JP4811348B2 - Drum washing machine - Google Patents

Description

  The present invention relates to a drum type washing machine that performs washing, rinsing, and dewatering processes in a rotating drum having a rotation center axis in a horizontal direction or a substantially inclined direction.

  Conventionally, this type of drum-type washing machine is generally provided with a function of increasing the temperature of the washing water by heating means in order to enhance the washing effect of the clothes or to kill bacteria attached to the clothes. (For example, see Patent Document 1).

  FIG. 7 shows a conventional drum-type washing machine described in Patent Document 1. In FIG. Hereinafter, the configuration will be described.

  As shown in FIG. 7, the rotating drum 1 is provided with a large number of water passage holes 2 on the entire outer peripheral portion and is rotatably disposed in the outer tub 3. One end of the rotary shaft 4 is fixed in a substantially horizontal direction at the rotation center of the rotary drum 1, and a driven pulley 5 is fixed on the other end of the rotary shaft 4. The first motor 6 rotates or rotates the rotary drum 1 at a sixth predetermined rotational speed N6 (for example, 53 r / min), and the second motor 7 rotates the rotary drum 1. The dehydration is performed by rotating at a high speed at a seventh predetermined rotation speed N7 (for example, 1000 r / min).

  The first motor 6 and the second motor 7 are connected to the driven pulley 5 via belts 8 and 9, respectively. The driven pulley 5 has two types of reduction ratios, and the first motor 6 is connected to a driven pulley 5a having a large reduction ratio via a belt 8 to rotate the rotary drum at a low speed, thereby allowing the second motor 7 to rotate. Is connected to a driven pulley 5b having a small reduction ratio via a belt 9 to rotate the rotating drum 1 at a high speed.

  The outer tub 3 includes a substantially circular outer tub main body 3a whose section is centered on the rotation shaft 4 and a substantially circular outer tub front plate 3b covering the opening of the outer tub main body 3a. The rotating drum 1 and the outer tub 3 are configured so that the shape perpendicular to the rotating shaft 4 is substantially concentric with the rotating shaft 4 as the center, and a heater (heating means) 14 is accommodated on the bottom side. A substantially concave heating body accommodating chamber 15 is provided.

  The outer tub 3 is suspended so as to be swingable by a spring body 11 from above the outer box 10, the vibration at the time of dehydration activation is reduced by the vibration isolation damper 12, and the vibration at the time of steady dehydration is not transmitted to the outer box 10. In this way, a weight 13 is provided to prevent vibration and reduce vibration during dehydration. Further, one end of a drainage hose 16 is connected to the bottom of the outer tub 3, and the other end of the hose 16 is connected to a drainage pump 17 to drain the washing water in the outer tub 3. Near the lower portion of the heater 14, a temperature detection device 18 and an overtemperature prevention device 19 are fixed to the bottom of the outer tub body 3a.

  The substantially cylindrical packing member 20 is made of a flexible material such as rubber and connects the opening of the outer tub 3 corresponding to the front opening of the rotating drum 1 and the front opening of the body in a watertight manner. Thus, the outer tank side end is fixed to the outer tank front plate 3b. A lid 21 is provided at the opening on the front of the body so as to be freely opened and closed. The water supply valve 22 supplies water into the outer tub 3.

  The control device 23 controls the operation of electrical components such as the first motor 6, the second motor 7, the heater 14, the drainage pump 17, and the water supply valve 22, and sequentially controls a series of processes such as washing, rinsing, and dehydration. Control means, input means, display means and the like.

  To explain the operation in the above configuration, the lid 21 is opened, the laundry is put into the rotary drum 1, the power switch (not shown) is turned on, and then the start switch (not shown) provided in the control device 23 is turned on. When the operation is started by operating, the water supply valve 22 operates to supply water, and when a predetermined water level is detected by a water level detection means (not shown), the water supply is stopped and the first motor 6 is driven. In the washing process, since water is absorbed into the laundry, the rotating drum 1 is driven to rotate at a low speed by the first motor 6 at the first rotational speed N1 while supplying the deficient water, and the laundry in the rotating drum 1 is recovered. Do soups that are lifted and dropped onto the water surface.

  At that time, the heater 14 is energized, the temperature is detected by the temperature detector 18, the temperature of the washing water in the outer tub 3 is controlled, the washing water in the outer tub is heated, and the washing water and detergent It is the structure which improves the cleaning effect by activation.

  When the washing process ends, the drain pump 17 operates to drain the washing water in the outer tub 3. In the rinsing process, the same operation as in the washing process is performed.

In the dehydration process, the rotary drum 1 is driven to rotate at a high speed at the second rotation speed N2 by the second motor 7, and the laundry is dehydrated by centrifugation. At this time, when the laundry in the rotating drum 1 is shifted, that is, when an imbalance occurs, the swinging bodies such as the rotating drum 1 and the outer tub 3 vibrate. At the time of steady dehydration, the vibration is not transmitted to the outer box 10 by the vibration isolation mechanism of the vibration isolation damper 12.
Japanese Patent Laid-Open No. 10-263285

  However, in the drum type washing machine having such a conventional heater (heating means), since the control of the heater (heating means) and the control of the rotating drum are not linked, the molecular motion of the washing water and the activity of the detergent There was a problem that waste was made. In addition, because the washing water is heated for a long time, there is a problem that the laundry is damaged and wrinkled due to the combined action of the high temperature and the impact force of the tapping wash in order to wash for a long time. was there. Furthermore, it has been a problem to waste power consumption, that is, energy, to perform washing at a high temperature for a long time.

  The present invention solves the above-described conventional problems, most effectively utilizing the molecular motion of heated washing water and activation of detergent, and while suppressing the occurrence of damage and wrinkles in the laundry, An object of the present invention is to provide an energy-saving drum-type washing machine that performs washing that always secures a detergency exceeding a certain level while suppressing wasteful power consumption.

  In order to achieve the above object, the present invention provides a control means for controlling the steps of washing, rinsing, dehydration, etc., the heating means and the temperature detecting means, etc. Until the predetermined temperature of 1 is detected, the laundry that is lifted upward by the rotation of the rotating drum rotates the rotating drum at a first predetermined rotating speed that performs a stirring operation in which the laundry falls from a height position where its own weight is superior. When the temperature detecting means detects the first predetermined temperature, the heating means is turned off, and the temperature detecting means detects a second predetermined temperature lower than the first predetermined temperature. In the meantime, the temperature adjustment process in which the rotating drum is rotationally controlled at the second predetermined rotation speed so that the stirring force applied to the laundry is less than the first predetermined rotation speed, After the second predetermined temperature is detected after the temperature adjustment step, the heating means rotates at the first predetermined rotational speed at the same rotational speed as in the warm water agitation washing step from when the heating means is turned on until the first predetermined temperature is detected again. The warming stirring and washing process in which the drum is rotated can be repeatedly executed during the washing process.

  Thus, when washing water is heated, the molecular motion of the washing water and activation of the detergent are increased, and when the washing water is not heated, the stirring force applied to the laundry is weakened. The most effective use of molecular movement and detergent activation, while preventing damage and wrinkles in the laundry, and always washing more than a certain amount of washing and wasteful consumption Power can be reduced.

  The drum type washing machine of the present invention can suppress the generation of damage and wrinkles of the laundry due to hot water washing, and can suppress energy consumption.

  According to a first aspect of the present invention, there is provided a rotating drum having a rotation center axis in a substantially horizontal direction or a substantially inclined direction and having a large number of water passage holes in a body portion, and water that is elastically supported by a washing machine body and contains the rotating drum. A receiving tub, a driving means for rotationally driving the rotating drum, a water supplying means for supplying water into the water receiving tub, a heating means for heating washing water in the water receiving tub, and water in the water receiving tub Temperature detection means for detecting temperature; and control means for inputting information from the temperature detection means and controlling the driving means, the water supply means, the heating means, and the like so as to sequentially control processes such as washing, rinsing and dehydration. The control means turns on the heating means in the washing step, and the temperature detecting means moves upward by the rotation of the rotating drum during a period from when the heating means is turned on until the first predetermined temperature is detected. Lifted to wash When the temperature detecting means detects the first predetermined temperature, the hot water stirring and washing step of rotating the rotating drum at a first predetermined rotating speed for performing the stirring operation in which the object falls from a height position where the weight of the object falls. The heating means is turned OFF, and the temperature adjustment process until the second predetermined temperature lower than the first predetermined temperature is detected. When the temperature detecting means detects the second predetermined temperature, the heating means is turned on again. ON, and a heating and stirring and washing process in which the rotating drum is rotated at the first predetermined rotation speed from when the heating means is turned on until the first predetermined temperature is detected can be executed. In the temperature adjustment step, the rotary dryer is provided so that the laundry is given a stirring force smaller than the stirring force applied to the laundry in the warm water stirring washing step and the heat retaining stirring washing step. The temperature adjustment process and the heat-retaining stirring process are repeated during the time period of the washing process, so that a predetermined stirring force is applied to the laundry while heating the washing water. While maintaining the water temperature uniformly, the molecular motion of the washing water and the activation of the detergent can be utilized most effectively. Also, when the washing water is not heated, the stirring force applied to the laundry is increased. By weakening, it is possible to carry out washing that always secures a certain level of washing power while preventing the damage and wrinkles of the laundry caused by the combined action of high temperature and the impact force of tapping. It also saves energy by reducing power consumption.

  According to a second aspect of the present invention, in the drum-type washing machine according to the first aspect of the invention, in the temperature adjustment process, the control means causes the laundry to rotate at the first rotational speed that is lower than the first predetermined rotational speed. The position of the laundry is changed with a weak stirring force by controlling to execute the first weak stirring operation of rotating the rotating drum at a second predetermined rotational speed falling from a lower height position when Since the heated washing water can be uniformly permeated into the laundry, it is possible to suppress damage and wrinkles of the laundry, increase the cleaning power, and reduce washing unevenness.

  According to a third aspect of the present invention, in the drum-type washing machine according to the first aspect of the present invention, the control means controls the rotary drum so as to repeatedly drive a predetermined forward rotation, pause, inversion, and pause at predetermined times, In the temperature adjustment process, the second weak stirring operation is adjusted to at least one of shortening the forward inversion time or extending the pause time with respect to the warm water stirring and washing process. Since the position of the laundry can be changed with a weak agitation force and the heated washing water can be evenly permeated into the laundry, the damage and wrinkles of the laundry are suppressed. In addition, the cleaning power can be increased and washing unevenness can be reduced.

  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.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a drum type washing machine according to a first embodiment of the present invention, FIG. 2 is a block diagram of a control circuit of the drum type washing machine, and FIG. 3 is a drum type washing machine. 4 is an enlarged front view of the input setting means and display means of the machine, FIG. 4 is a first main part operation flowchart of the drum type washing machine, FIG. 5 is a second main part operation flowchart of the drum type washing machine, and FIG. It is explanatory drawing of the high temperature washing process of the drum type washing machine.

  As shown in FIG. 1, the rotating drum 24 is formed in a bottomed cylindrical shape, and a large number of water passage holes 25 are provided on the entire outer periphery thereof, and are rotatably disposed in the water receiving tank 26. A rotation axis (rotation center axis) 27 is provided at the rotation center of the rotary drum 24 in a substantially inclined direction, and the axial center direction of the rotation drum 24 is inclined downward from the front side toward the back side. The rotation of the motor (driving means) 28 attached to the outer bottom surface of the water receiving tank 26 is between a driving pulley 50 fixed to the rotating shaft of the motor 28 and a driven pulley 51 fixed to the end of the rotating shaft 27. It is transmitted to the rotary shaft 27 by the stretched V-belt 52, and the rotary drum 24 is driven to rotate in the forward and reverse directions. Several protruding plates 29 are provided on the inner wall surface of the rotating drum 24 to perform a stirring operation of lifting and dropping clothes in the rotating direction, so-called tapping.

  The opening 30b provided in the upward inclined surface 30a on the front side of the washing machine body 30 is covered with a lid 31 so as to be freely opened and closed. By opening the lid 31, the water receiving tub clothing entrance 26a and the rotation of the water receiving tub 26 are rotated. The laundry can be taken in and out of the rotary drum 24 through the rotary drum clothing entrance 24a of the drum 24. Note that the lid 31 has a configuration capable of operating the lid lock 40 so as not to open in order to maintain the safety of the user during the driving operation.

  The water receiving tank 26 is swingably supported by the washing machine body 30 by a spring 33 and a vibration absorbing damper 34, and is supported for vibration isolation. One end of a drainage path 32 is connected to the lower part of the water receiving tank 26, and drainage is performed. The other end of the path 32 is connected to a drain valve 36 so that the washing water in the water receiving tank 26 is drained outside the machine.

  One end of a first water supply hose 48 a is connected to the first water supply valve (water supply means) 37, the other end of the first water supply hose 48 a is connected to a detergent case 35 for storing detergent, and a lower part of the detergent case 35 One end of the second water supply hose 48 b is connected to the other end, and the other end of the second water supply hose 48 b is connected to the outer tub 26 so that water can be supplied into the outer tub 26.

  One end of a third water supply hose 49a is connected to the second water supply valve (water supply means) 38, and the other end of the third water supply hose 49a is connected to a water injection cap part 49b. The water injection cap portion 49 b is opened in a slit shape so that the water to be injected is injected into the rotary drum 24 while spreading in a substantially horizontal direction, and water is injected so as to spread into the rotary drum 24.

  The water level detection means 39 detects the water level in the water receiving tank 26. In addition, a heater (heating means) 41 for heating the washing water and a temperature detection means 42 for detecting the temperature of the washing water are provided at the inner bottom portion of the water receiving tub 26, and has a function of washing the laundry in the rotary drum 24 with warm water. is doing.

  In the present embodiment, the rotation shaft 27 is provided in a substantially inclined direction at the rotation center of the rotary drum 24, and the axial center direction of the rotary drum 24 is inclined downward from the front side toward the back side. However, the rotary shaft 27 may be provided in the substantially horizontal direction at the rotation center of the rotary drum 24, and the axial center direction of the rotary drum 24 may be provided in the substantially horizontal direction.

  In this embodiment, the rotation of the motor 28 attached to the outer bottom surface of the water receiving tank 26 includes a drive pulley 50 fixed to the rotation shaft of the motor 28 and a driven pulley 51 fixed to the end of the rotation shaft 27. The motor 28 is fixed to the back surface of the water receiving tank 26, and the rotary shaft 27 of the rotary drum 24 and the motor 28 are connected to each other. You may connect with a rotating shaft directly.

  The control device 43 is configured as shown in the control circuit diagram of FIG. 2, and operates the motor 28, the drain valve 36, the first water supply valve 37, the second water supply valve 38, the heater 41, the lid lock 40, and the like. Control means 44 comprising a microcomputer for controlling and sequentially controlling a series of steps of washing, rinsing and dehydration is provided. The control unit 44 inputs information from the input setting unit 45 for setting the driving course and the like, displays the information on the display unit 46 based on the information, notifies the user, and starts the operation by the input setting unit 45. Is set, the cloth amount detecting means 55 for detecting the amount of laundry from the load change received by the motor 28 according to the amount of laundry, the water level detecting means 39 for detecting the water level in the water receiving tank 26, and the water receiver Data from a temperature detection means 42 for detecting the temperature of the water in the tank 26 is input, and the motor 28, the drain valve 36, the first water supply valve 37, and the second water supply valve 38 are connected via the load driving means 47. The operation of the heater 41, the lid lock 40, etc. is controlled to perform the washing operation.

  As shown in FIG. 3, the input setting means 45 includes a washing time setting switch 45a for setting the washing time, a rinsing frequency setting switch 45b for setting the rinsing frequency, a dehydration time setting switch 45c for setting the dehydration time, and start / pause. A switch 45e, a power-on switch 45f, a power-off switch 45g, a water level change input setting switch 45h, a water temperature change input switch 45i, a course setting switch 45d for selecting various washing courses, and the like.

  Similarly, as shown in FIG. 3, the display means 46 is a “sterilization time for washing with high temperature water set by the washing time display section 46 a, the rinse count display section 46 b, the dehydration time display section 46 c, and the course setting switch 45 d described above. Course setting display section 46d for displaying "course", water level display section (water level display means) 46e, water temperature display section 46f, remaining time display section 46g, lid lock for displaying whether lid 31 is locked by lid lock 40 A display unit 46h and the like are included.

  In the configuration of the drum type washing machine configured as described above, the operation and action will be described with reference to the main part operation flowchart 1 in FIG. 4, the main part operation flowchart 2 in FIG. 5, and the high temperature washing process explanatory diagram in FIG. To do.

  The lid 31 is opened, the laundry is put into the rotary drum 24, the operation is started in S100, the power switch 45f is turned on in S101, and the course setting switch 45d is operated in S102 to set a high-temperature course. . In S103, it is determined whether or not the setting of the water level, the water temperature, the washing time, the number of times of rinsing, and the dehydration time are changed. When there is a change, each setting is changed by operating the washing time setting switch 45a, the number of rinsing times switch 45b, the dehydration time setting switch 45c, the water level change input setting switch 45h, the water temperature change input switch 45i, etc. Then, the change contents are displayed on the display means 46. If there is no change, the process proceeds to S105.

  In S105, when the operation is started by operating the start switch 45e provided in the control device 43, the control means 44 causes the lid lock 40 or the like to function in S106, and in the next S107, the rotary drum 5 is rotated by the cloth amount detection means. By detecting the amount of laundry. A water amount corresponding water level corresponding to the amount of laundry detected in S108 is determined.

  Next, the first water supply process (S109 to S111) will be described. In S109, the first water supply valve 37 is opened, water is poured into the detergent case 35 through the first water supply hose 48a, and the water that has flowed into the detergent case 35 is a detergent (not shown) contained in the detergent case 35. At the same time, it passes through the second water supply hose 48 b connected to the lower part of the detergent case 35 and flows into the water receiving tank 26.

  In S110, when the water level detection means 39 detects that water has been supplied to the first predetermined water level lower than the laundry level corresponding water level, in S111, the first water supply valve 37 is closed and the water supply is stopped.

  Next, the detergent melting process (S112 to S114) will be described. In S <b> 112, the rotating drum 24 is rotated at a third predetermined rotation speed N <b> 3 that allows the laundry to stick to the inner wall of the rotating drum 24. Then, the rotation is performed until a first predetermined time (for example, 1 minute) elapses in S113. Here, the third predetermined rotational speed N3 is a rotational speed at which the laundry is stuck to the inner peripheral surface of the rotating drum 5 by the centrifugal force accompanying the rotation of the rotating drum 24. For example, the diameter of the rotating drum 3 is When it is about 500 ± 50 mm, the rotation speed is about 90 to 140 r / min. Further, if the first predetermined water level is set to such a level that the lowermost part of the rotary drum 24 is submerged, the rotary drum 24 is driven to rotate at a fast third predetermined rotation speed N3, whereby the water receiving tank 26 It is possible to generate a quick water flow in the water and the detergent supplied to the detergent and dissolve the detergent efficiently and quickly.

  When the first predetermined time has elapsed in S113, the rotation of the rotary drum 24 is stopped in S114.

  Next, the second water supply process (S115 to S118) will be described. In S115, the first water supply valve 37 is opened and the second water supply valve 38 is opened. When the second water supply valve 38 is opened, water is injected into the rotary drum 24 from the water injection cap portion 49b through the third water supply hose 49a. As described above, since the water injection cap portion 49b is opened in a slit shape, the injected water spreads in a substantially horizontal direction and sprinkles on the laundry in the rotating drum 24 and penetrates into the laundry. At the same time, in S116, the rotating drum 24 is rotated forward (for example, 10 seconds), stopped (for example, 5 seconds), reversed (for example, 10 seconds), and stopped at a fourth predetermined rotational speed N4 (for example, 45 r / min). The reversal rotation drive is repeated (for example, 5 seconds). Thereby, since the laundry moves in the rotary drum 24, the washing water can be applied evenly to the laundry, and the washing water can be permeated substantially uniformly. Therefore, when the rotating drum 24 is rotated at the fifth predetermined rotation speed N5 (for example, 100 r / min or more), which is a high rotation speed, in the subsequent foam generation process (S119 to S121), the washing water is applied to the laundry. It is possible to prevent the problem that the unbalanced uneven load due to non-uniform permeation causes the water receiving tank 26 to vibrate abnormally.

  In S117, when the water level detecting means 39 detects that the water has been supplied to the second predetermined water level that is higher than the first predetermined water level and lower than the laundry level-corresponding water level, the first water supply valve 37 and the first water supply valve 37 and the first water supply are detected in S118. The water supply valve 38 is closed to stop water supply, and the rotation of the rotary drum 24 is stopped.

  Next, the bubble generation process (S119 to S121) will be described. In S119, the rotational speed of the rotary drum 24 is raised to a fifth predetermined rotational speed N5 (for example, 100 r / min or more), and the washing water in the water receiving tub 26 is bubbled to generate detergent foam.

  The detergent foam generated in a large amount in this manner is filled between the water receiving tank 26 and the rotary drum 24, rises to the rotary drum opening 24a side, and flows into the rotary drum 24 from the rotary drum opening 24a. .

  As described above, when the rotating drum 24 is rotated at the fifth predetermined rotation speed N5 for the second predetermined time of S120 (for example, 30 seconds) to generate detergent bubbles, the rotating drum 24 is filled with the detergent bubbles. In step S121, the rotation of the rotary drum 24 is stopped.

  Furthermore, the laundry is rotating with the inner surface of the rotating drum 24 being stuck, and the detergent has a detergent foam in a wider range than the state where the laundry is hardened and rotated while being partially biased. And the detergent foam can penetrate the entire laundry more quickly.

  As described above, in the foam generation process (S119 to S121), the detergent component easily acts on the dirt by making the washing water into a foam with a large volume and adhering and penetrating into the laundry in the rotating drum 5. , High-concentration washing water can easily permeate, and washing unevenness is suppressed and cleaning power is improved. In addition, since the washing power can be increased as the washing water containing the detergent foam penetrates into the laundry at an early stage, it is desirable to perform this foam generation process as early as possible.

  Next, the third water supply process (S122 to S126) will be described. In S122, the second water supply valve 38 is opened and water is supplied into the rotary drum 24 from the water injection cap 49b through the third water supply hose 49a. In S123, the rotary drum 24 is moved to the fourth predetermined rotational speed N4 (the rotary drum 24). When the laundry contained therein is lifted in the rotational direction by the rotation of the rotating drum 24 and moved to a height position where the weight of the laundry is higher than the inertia and centrifugal force associated with the rotation, the laundry is placed on the lower inner peripheral surface of the rotating drum 24. Rotation speed indicating the falling behavior (for example, 45 r / min), right rotation (for example, 15 seconds), pause (for example, 5 seconds), left rotation at the fourth predetermined rotation speed N4 (for example, 15 seconds), pause (for example) For example, the rotation is repeated in the order of 5 seconds).

  In S124, when the third predetermined water level (a water level approximately equal to or lower than the second predetermined water level) is detected, in S125, the second water supply valve 38 is closed to stop water supply.

  Thereafter, when the passage of a third predetermined time (for example, 1 minute 30 seconds) is detected in S126, the third water supply process is terminated, and the process proceeds to the next warm water stirring and washing process (S127 to S132).

  As mentioned above, in the 3rd water supply process (S122-S126), by supplying water directly in the rotating drum 24, the detergent foam in the rotating drum 24 is reduced and the detergent concentration of washing water is reduced. That is, if there is detergent foam in the rotating drum 5 when performing tapping washing in the subsequent warm water stirring washing process, the detergent foam becomes a buffer material, and the tapping effect cannot be sufficiently obtained. Therefore, by supplying water in this second water supply process, detergent bubbles are reduced, and the detergent concentration is lowered to reduce foaming of washing water.

  Next, the hot water stirring and washing process (S127 to S132) will be described. In S127, the heater 41 is energized, and in S128, the first water supply valve 37 is opened to supply water into the water receiving tank 26, and the second water supply valve 38 is opened and the water supply cap 49b is opened through the third water supply hose 49a. To supply water into the rotary drum 24. At the same time, in S129, the rotary drum 24 is rotated right (for example, 5 seconds), paused (for example, 15 seconds), first predetermined rotation speed N1 at the first predetermined rotation speed N1 (for example, 45 r / min). Rotate counterclockwise repeatedly in the order of left rotation (for example, 5 seconds) and pause (for example, 15 seconds).

  As described above, in the warm water stirring and washing process, the rotating drum 24 is rotated at the first predetermined rotation speed N1, so that the protrusion plates 29 provided at a plurality of positions on the inner peripheral surface of the rotating drum 24 are rotated. Hook the laundry inside and lift it in the direction of rotation. The lifted laundry drops when its own weight is lifted to a height that exceeds the inertia and centrifugal force associated with rotation. Since the laundry is lifted and dropped one after another in this way, the positions are changed one after another, and the water supplied from the water injection cap 49b to the rotary drum 24 is applied almost uniformly to the laundry and penetrates. Thereby, the detergent foam adhering and penetrating into the laundry further penetrates into the inside of the laundry by the water supplied from the water injection cap portion 49b. As described above, the laundry is washed with the impact force when it falls while the detergent foam penetrates the laundry as needed.

  Further, by heating the washing water while stirring, the temperature of the washing water and the laundry is kept uniform, so that the cleaning power can be increased and washing unevenness can be reduced.

  Further, since the heater 41 is energized at this time, the inversion time period (right rotation (for example, 15 seconds), pause (for example, 5 seconds), left rotation (for example, 15 seconds), pause in the third water supply stroke (For example, 5 seconds), the rotation time is shortened and the rest time is set longer, so that the damage and wrinkles of the laundry caused by the combined action of the laundry temperature and mechanical force when the water temperature rises are suppressed. To do.

  When water is supplied to the laundry level corresponding water level (S130), in S131, the first water supply valve 37 and the second water supply valve 38 are closed, and water supply is stopped. In S132, when the temperature of the washing water reaches a first predetermined temperature (for example, 40 ° C.) or higher, the process proceeds to the next temperature adjustment process (S133 to S135).

  In the temperature adjustment process, first, for the energization control of the heater 41, as shown in FIGS. 4 to 6, the energization of the heater 41 is stopped in S133, and at the same time, the rotation control of the rotary drum 24 is performed in S134. The rotating drum 24 is moved at a second predetermined rotational speed N2 (for example, 35 r / min) (first weak stirring operation) lower than the first predetermined speed N1 (for example, 45 r / min) and hot water Rotation time is shortened from the reversal time limit (right rotation (for example, 5 seconds), pause (for example, 15 seconds), counterclockwise rotation (for example, 5 seconds), pause (for example, 15 seconds)) in the agitation washing process. Second weak stirring operation with repeated rotation in the order of right rotation (for example, 3 seconds), pause (for example, 17 seconds), left rotation (for example, 3 seconds), and pause (for example, 17 seconds) with a long time Let

  Thereby, since the rotation speed of the rotating drum 24 is lowered and the rotation time is also shortened, it is possible to suppress the damage and wrinkles of the laundry caused by the combined action of the temperature of the laundry and the mechanical force. Furthermore, since the time for stirring the heated washing water is reduced, it is possible to prevent a large amount of detergent bubbles from being generated, and to save energy because unnecessary power consumption is suppressed.

  In S135, when it is detected that the temperature of the washing water is equal to or lower than the second predetermined temperature (for example, 37 ° C.), the process proceeds to the next heat-retaining stirring washing process (S136 to S138).

  In the heat insulation stirring washing process, in S136, the heater 41 is energized, and in S137, the rotating drum 24 is rotated clockwise (for example, 5 seconds) at a first predetermined rotation speed N1 (for example, 45 r / min) and paused (for example, for example). 15 seconds) · The left rotation (for example, 5 seconds) and pause (for example, 15 seconds) are repeatedly performed at the first predetermined rotation speed N1 in this order.

  As described above, the rotating drum 24 is rotated at the first predetermined rotation speed N1, and the reverse rotation period is the same as that in the warm water stirring and washing process, such as clockwise rotation (for example, 15 seconds), pause (for example, 5 seconds), By operating left rotation (for example, 15 seconds) and rest (for example, 5 seconds), the vertical movement of the laundry is sufficiently performed, and the positions are sequentially changed one after another. By heating the washing water while stirring, Since the temperature of the washing water and the laundry is kept uniform, the washing power can be increased and washing unevenness can be reduced.

  In addition, since the heater 41 is energized at this time, the inversion time period (right rotation (for example, 15 seconds), pause (for example, 5 seconds), and left rotation for performing an extremely strong stirring operation as in the third water supply stroke is performed. (For example, 15 seconds) and rest (for example, 5 seconds), the rotation time is shortened and the rest time is set to be long, so it occurs due to the combined action of the laundry temperature and mechanical force when the water temperature rises. It suppresses the damage and wrinkles of the laundry.

  Thereafter, in S138, when it is detected that the temperature of the washing water is equal to or higher than a first predetermined temperature (for example, 40 ° C.), the process returns to the temperature adjustment process in S133, and energization of the heater 41 is stopped. This operation is repeated in S139 until the sixth predetermined time (for example, 50 minutes) has elapsed after the temperature adjustment process is started.

  As described above, when it is determined in S139 that the sixth predetermined time, that is, the time limit of the washing process has elapsed, the process proceeds to the rinsing process S140 of the next process, and the energization control of the heater 41 and the rotation control of the rotary drum 24 are performed. Stop. Since the operation of the rinsing process is the same as the conventional one, the description is omitted.

  As described above, by performing the warm water stirring and washing process (S127 to S132), the temperature adjustment process (S133 to S135), and the heat retaining stirring and washing process (S136 to S138), it is possible to suppress damage and wrinkles of the laundry. The detergency over a certain level can always be ensured.

  In addition, by performing the heat-retaining stirring and washing process, wasteful power consumption is suppressed, thereby saving energy.

  In the present embodiment, in the temperature adjustment process (S133 to S135), the first weak stirring operation, that is, the drum rotation speed is set to a low value such as 35 r / min, and the second weak stirring operation, that is, For example, both the rotation rotation period of the drum is set to 3 seconds of operation and 17 seconds of rest and the stirring time is shortened. However, even if only one of the stirring operations is performed, the same effect can be obtained.

  Further, in the second weak stirring operation of the temperature adjustment process (S133 to S135), both the rotation time is shortened and the resting time is longer than the inversion time in the warm water stirring washing process, but the rotation time is shortened. The same effect can be obtained only by increasing the pause time.

  As described above, the drum-type washing machine according to the present invention increases the molecular motion of the washing water and the activation of the detergent by heating the washing water. By weakening the stirring force applied to the laundry, it is possible to execute washing that constantly secures a certain level of cleaning power while suppressing wasteful power consumption while suppressing damage and wrinkles on the laundry. It can also be used for a drum-type washing and drying machine having a drying function.

The longitudinal cross-sectional view of the drum type washing machine in Embodiment 1 of this invention Control circuit diagram of a part of the drum type washing machine Enlarged front view of input setting means and display means of the drum type washing machine First main part operation flowchart of the drum type washing machine Second main part operation flowchart of the drum type washing machine Explanatory drawing of the hot washing process of the drum type washing machine Vertical section of a conventional drum-type washing machine

Explanation of symbols

24 Rotating drum 25 Water passage hole 26 Water receiving tank 27 Rotating shaft (Rotating center shaft)
28 Motor (drive means)
30 Washing machine body 37 First water supply valve (water supply means)
38 Second water supply valve (water supply means)
41 Heater (heating means)
42 Temperature detection means 44 Control means

Claims (3)

A rotating drum having a rotation center axis in a substantially horizontal direction or a substantially inclined direction and having a large number of water passage holes in a body portion; a water receiving tank elastically supported by a washing machine body and containing the rotating drum; and the rotation Drive means for rotationally driving the drum, water supply means for supplying water into the water receiving tub, heating means for heating washing water in the water receiving tub, and temperature detection for detecting the temperature of water in the water receiving tub And control means for sequentially controlling processes such as washing, rinsing, dehydration and the like by inputting information from the temperature detecting means and controlling the driving means, the water supply means, the heating means and the like, the control means comprising: In the washing process, the heating unit is turned on, and the laundry is lifted upward by the rotation of the rotating drum during a period from when the heating unit is turned on until the first predetermined temperature is detected. But its own The hot water stirring and washing process of rotating the rotating drum at a first predetermined rotational speed for performing the stirring operation of dropping from a height position where the temperature is superior, and the heating means is turned off when the temperature detecting means detects the first predetermined temperature. A temperature adjustment process until a second predetermined temperature lower than the first predetermined temperature is detected, and when the temperature detecting means detects the second predetermined temperature, the heating means is turned on again, and the heating The temperature maintaining step can be performed during the period from the start of turning on of the means to the detection of the first predetermined temperature, with the heat-retaining and washing step in which the rotating drum is rotated at the first predetermined rotation speed. The rotation drum is rotationally controlled so that the laundry is given a stirring force smaller than the stirring force given to the laundry in the warm water stirring washing step and the heat retaining stirring washing step. The temperature control step and the mixture was stirred while keeping stroke cycled in timed stroke washing drum type washing machine. In the temperature adjustment process, the control means has the second predetermined rotation speed at which the laundry falls from a lower position than when the laundry is rotating at the first rotation speed lower than the first predetermined rotation speed. The drum type washing machine according to claim 1, wherein the first weak stirring operation for rotating the rotating drum is controlled. The control means controls the rotating drum to be repeatedly driven in predetermined forward rotation, pause, inversion, and pause at predetermined times, respectively. In the temperature adjustment process, the normal rotation inversion is performed with respect to the hot water stirring and washing process. 2. The drum type washing machine according to claim 1, wherein the second weak agitation operation adjusted to at least one of shortening the period of time and / or extending the pause time is performed.