JP4591286B2 - Drum washing machine - Google Patents

Description

  The present invention relates to a drum-type washing machine that performs washing, rinsing, and dewatering 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 configured as shown 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 the rotating drum 1 at a first rotation speed N1 (for example, 53 r / min) to perform washing or rinsing, and the second motor 7 moves the rotating drum 1 to the first rotation. Dehydration is performed by rotating at a rotation speed N2 of 2 (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 the driven pulley 5a having a large reduction ratio via the belt 8 so that the low-speed rotation of the rotary drum is performed by the second motor 7. Is connected to a driven pulley 5b having a small reduction ratio via a belt 9 to realize high-speed rotation of the rotating drum.

  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. And the rotary drum 1 and the outer tub 3 are configured so that the shape in the direction orthogonal to the rotary shaft 4 is substantially concentric with the rotary shaft 4 as the center, and a substantially concave shape that houses the heater 14 on the bottom side. The heating body accommodating chamber 15 is provided.

  The outer tub 3 is suspended from the outer box 10 so as to be swingable by a spring body 11, and the vibration at the time of dehydration is reduced by the vibration damper 12 so that the vibration at the time of steady dehydration is not transmitted to the outer box 10. A weight 13 is provided for vibration-proofing and reducing 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. The 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 operations of the first motor 6, the second motor 7, the heater 14, the drain pump 17, the water supply valve 22, and the like, and sequentially controls a series of processes such as washing, rinsing, and dehydration (for example, , See Patent Document 1).

  The control device 23 is composed of a stroke control means, input settings, 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 the laundry contains water, the revolving drum 1 is driven to rotate at the first rotation speed N1 by the first motor 6 while replenishing water, and the laundry in the rotating drum 1 is lifted to the surface of the water. Fall down.

  In this type of drum-type washing machine, a function of increasing the temperature of the washing water is generally added in order to enhance the washing effect of the clothes or to kill bacteria attached to the clothes. For this purpose, the heater 14 is energized, the temperature is detected by the temperature detector 18, and the washing water in the outer tub 3 is heated while being controlled to a substantially constant temperature. However, safety measures are also required while the temperature rises. If a failure occurs in the control device 23 and the heater 14 is energized even though there is no water in the outer tub 3, the temperature in the outer tub 3 rises abnormally. The energization to the heater 14 is cut off by the prevention device 19 and does not lead to equipment damage or fire due to overheating.

  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 rotationally driven by the second motor 7 at the second rotational speed N2, and the laundry is centrifugally dehydrated. 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, but when the dehydration is started, the vibration isolating damper 12 vibrates the swinging body. 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 such a conventional configuration, when the washing water is heated to a high temperature (for example, 80 ° C. or higher), the temperature of the rotating drum is similarly high, and the door can be opened during the washing process or after the process is completed. In such a case, there was a risk that the user might get burned by touching the internal rotating drum. Alternatively, in order to prevent the risk of burns, if the door body is controlled not to be opened until the end of the washing, rinsing and dehydration processes, there has been a complaint that the door cannot be opened halfway after starting operation. Furthermore, when a large amount of high-temperature water is drained as it is after the washing process, it is necessary to improve the heat resistance of the drainage path on the main body side, and there are also problems such as performing drainage under conditions that the user does not touch. In order to solve this problem, it was necessary to perform a cooling operation in which water supply and drainage are repeated until the heated wash water is lowered to a predetermined temperature in the drainage step after the high-temperature washing step. However, if there is any malfunction during the cooling operation, such as when water supply from tap water stops, water supply is not performed for a predetermined time and a water supply abnormality is detected. The operation will remain stopped with the error display indicating "Abnormal". In this case, the user cannot forcibly drain the hot water in the rotating drum or leave the laundry in the rotating drum for a long time until the hot water in the rotating drum falls to a predetermined temperature. There were issues with safety and convenience.

The present invention solves the above-described conventional problems, and in the draining process after the completion of the high-temperature washing process, when performing a cooling operation of repeatedly supplying and draining water until the heated washing water is lowered to a predetermined temperature, a predetermined time is required. it if the water supply is not performed, which was so draining wash water in the rotary drum without the display sheet Mizukoto normal, not leave in a state of high-temperature water is accumulated in the rotary drum within As a result, the temperature inside the rotating drum is likely to drop, and the drum-type washing machine that improves the safety and convenience of the user is reduced by reducing the chance of the user coming into contact with hot washing water, laundry and the rotating drum. It is intended to provide.

In order to achieve the above-mentioned object while solving the conventional problems, a drum type washing machine according to the present invention has a bottomed cylindrical shape having a first opening in the front and a rotating shaft in a horizontal direction or an inclination direction. A rotating drum, a bottomed cylindrical water receiving tank having a second opening corresponding to the first opening, and including the rotating drum rotatably, and the water receiving tank being swingable A washing machine body that supports and has a third opening corresponding to the first opening and the second opening; and for loading and unloading laundry into and from the rotating drum provided in the washing machine body A door that opens and closes the third opening, a motor that rotationally drives the rotating drum, a heating means that heats the wash water in the water receiving tub, and a temperature of the washing water in the water receiving tub. Temperature detecting means for controlling the supply of washing water into the water receiving tank When controls a water level detecting means for detecting the level of the washing water in the water tray tank, the drainage of the washing water is provided in the middle of the drainage pathway communicating with the bottom of the water tub the water receiving tank drainage Control means for controlling a series of washing, rinsing and dehydrating operations by inputting data from the temperature detecting means and water level detecting means and controlling the motor, heating means, water supply means and drainage means, etc. And the control means controls the heating means to heat the washing water to a temperature equal to or higher than a first predetermined temperature for washing, and in the drainage process after the completion of the high temperature washing process, heated wash water until reduced to a second predetermined temperature, a cooling step for cooling operation of repeating a water supply and drainage by controlling the water supply means and drainage means, the predetermined time water at the cooling step Not done The case is one which is adapted to drain the water tub of warm water without the display sheet Mizukoto normal.

  As a result, by not leaving the hot water in the state where the hot water is accumulated in the rotating drum, the temperature in the rotating drum is also easily lowered, reducing the chance of the user coming into contact with hot washing water, laundry and the lid, The safety and convenience for the user can be improved.

  In the drum type washing machine of the present invention, the temperature in the rotating drum can be easily lowered and the safety and convenience can be improved by not leaving the hot water in the rotating drum.

According to a first aspect of the present invention, there is provided a bottomed cylindrical rotary drum having a first opening at the front and a rotating shaft in a horizontal direction or an inclination direction, and a second opening corresponding to the first opening. A bottomed cylindrical water receiving tank that rotatably includes the rotating drum, and a third opening corresponding to the first opening and the second opening that supports the water receiving tank in a swingable manner. A washing machine main body having an opening; a door provided in the washing machine main body for opening and closing a third opening for taking in and out the laundry; and a motor for rotationally driving the rotary drum; Heating means for heating the washing water in the water receiving tub, temperature detecting means for detecting the temperature of the washing water in the water receiving tub, and water supply means for controlling the supply of the washing water into the water receiving tub When the water level detection means for detecting the level of the washing water in the water tray tank, of the water tub The drainage means provided in the middle of the drainage path communicating with the section for controlling the drainage of the wash water in the water receiving tub, and the motor, the heating means, the water supply by inputting data from the temperature detection means and the water level detection means A control means for controlling a series of washing, rinsing, and dehydrating operations by controlling the means and the drainage means, and a display means, and the control means controls the heating means to supply the washing water to a first predetermined temperature. a hot washing step for washing is heated to above, in the drainage stroke after the hot washing cycle ends, until the heated washing water is lowered to a temperature at which the second predetermined temperature i.e. safety is ensured, the water supply A cooling step of controlling the means and the drainage means to perform a cooling operation of repeatedly supplying low-temperature water and discharging high-temperature water. When said water supply in some trouble in a predetermined time by the cooling process is not performed, without the display sheet Mizukoto normal, which has so as to drain the hot water water receiving tank, hot water Do not leave the battery in the rotating drum, the temperature inside the rotating drum is likely to drop, reducing the chances of the user coming into contact with hot washing water, laundry and the rotating drum. And convenience can be improved.

According to a second invention, in the first invention, the temperature detecting means detects that the washing water has dropped to the second predetermined temperature, and then drains the waste water, and the drainage temperature is controlled to the predetermined temperature. Therefore, the safety of the drainage route can be improved, and the temperature of the laundry and the rotating drum in the rotating drum after draining can be lowered to a safe temperature even if the user touches it. Safety can be improved.

The third invention is the first or second aspect of the invention, after draining the wash water, in which the predetermined time water when the water supply of the next rinsing step is to issue a display sheet Mizukoto normal if not done Yes, the user can deal with water supply abnormalities when the temperature in the rotating drum is low, and the chances of contact with hot washing water, laundry and rotating drum can be reduced, further improving user safety. Can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 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. It is an enlarged front view of the input setting of the machine and the display means.

  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. A motor 28 attached to the rear surface of the water receiving tank 26 is connected to the rotary shaft 27, and the rotary drum 24 is rotated in the forward and reverse directions. Several protruding plates 29 are provided on the inner wall surface of the rotating drum 24 to facilitate the stirring of the clothes. The opening provided in the upward inclined surface on the front side of the water receiving tub 26 is covered with a lid 30 so that it can be opened and closed. By opening the lid 30, the laundry can be taken in and out of the rotary drum 24 through the clothing entrance 31. ing. Since the lid 30 is provided on the upward inclined surface, the laundry can be taken out without bending the waist. Note that the lid 30 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 tub 26 is suspended and supported by a spring 33 and a damper 34 from the washing machine body 32 so as to be swingable, and a drainage path 35a having one end connected to a drainage port 35 below the water receiving tub 26 has the other end. The washing water in the water receiving tank 26 is drained by connecting to a drain valve (drainage means) 36. The water supply valve (water supply means) 37 supplies water into the water receiving tank 26 through the detergent charging case 37a and the water supply path 38a. The water supply valve 37 also communicates with a second water supply means 38b capable of supplying water from above the rotating drum 24 via the second water supply path 38c.

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

  An overflow port 49 is provided on the side wall of the water receiving tank 26, and is configured to overflow (overflow) when the amount of water exceeds the water level of the overflow port 49. One end of an overflow path (overflow path) 49 a is connected to the overflow port 49, and the other end of the overflow path (overflow path) 49 a is connected to a drainage path 35 b on the downstream side of the drain valve 36.

  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.

  The control device 43 constitutes a circuit as shown in FIG. 2, and controls the operation of the motor 28, the drain valve 36, the water supply valve 37, the heater 41, etc., and sequentially controls a series of steps of washing, rinsing and dehydration. Control means 44 comprising a microcomputer 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 data from the water level detection means 39 for detecting the water level in the water receiving tank 26 is input, and the operations of the drain valve 36, the water supply valve 37, the heater 41, etc. are performed via the load driving means 47. Control and perform 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, and a water temperature change input switch 45i are provided.

  As shown in FIG. 3, the display means 46 is a course setting display section for displaying a course set by a washing time display section 46a, a rinse count display section 46b, a dehydration time display section 46c, and a second course setting switch 45d. 46d, a water level display unit (water level display means) 46e, a water temperature display unit 46f, a number display unit 46g, a lid lock display unit 46h, and the like. The number display unit 46g displays the remaining time during normal operation. However, if an abnormality occurs during operation, the number display unit 46g is an abnormal display unit that displays an abnormal state using a certain symbol and number. Also comes to work. Examples of the abnormality display include an abnormality display in which drainage cannot be performed, an abnormality display in which water cannot be supplied, and an abnormality display informing that the door body is not properly closed.

  FIG. 4 is a main part operation flowchart of the drum type washing machine in the first embodiment, and the operation will be described below with reference to FIG. When the user opens the door body 30 and puts the laundry into the rotary drum 24 and closes the door body 30 again, the operation starts in step 100. After the power switch 45f is turned on in step 101, the course is started in step 102. The course is set by operating the setting switch 45d. Further, in step 103, it is determined whether or not the settings of the water level, the water temperature, the washing time, the number of times of rinsing, and the dehydration time are changed. If there are changes, the washing time setting switch 45a, the number of times of rinsing setting switch 45b, and the setting of the dehydration time are determined. The switch 45c, the water level change input setting switch 45h, and the water temperature change input switch 45i are operated to change each setting. In step 104, the change contents are displayed on the display means 46. If there is no change, the process proceeds to step 105. In step 105, when the operation is started by operating the start switch 45 e provided in the control device 43, the lid lock 40 is closed by the control means 44 in step 106. In step 107, the water supply valve 37 is operated to supply water. In step 108, it is determined whether or not the water level detecting means 39 supplies water to a predetermined water level. When it is determined that the water has been supplied to a predetermined water level, the process proceeds to a washing process in Step 109, and the motor 28 is driven to start the stirring rotation of the rotary drum 24. If the water has not been supplied to the predetermined water level, the process returns to step 107. In the washing process, since the water level is lowered because the laundry absorbs moisture, the rotating drum 24 is rotationally driven by the motor 28 at the rotation speed N while supplying the deficient amount, and the laundry in the rotating drum 24 is the protruding plate. It is lifted by 29 and falls onto the water surface or other clothing or the inner bottom of the rotating drum 24.

In step 110, it is confirmed whether or not the required water temperature of the heating means has been set. If the heating means has been set to the required water temperature, in step 111, the control device 43 passes through the control means 44 and the load driving means 47. Then, the heater 41 is controlled to heat the washing water. If the heating means is not set to the required water temperature in step 110, the process proceeds to step 114. In step 112, the temperature detection device 42 determines whether or not the temperature T of the washing water is heated to a first predetermined temperature T1 (for example, 90 ° C.) or higher. End control.

  In step 114, it is determined whether or not a predetermined washing time has elapsed. If the predetermined washing time has elapsed, the washing process is terminated in step 115, and the driving of the motor 28 is stopped by the control means 44 and the stirring drum 24 is stirred. Stop rotation.

  In step 116, the temperature detection device 42 determines whether or not the temperature T of the washing water is higher than a second predetermined temperature T2 (for example, 55 ° C.). It shifts to the cooling operation of 117-122. If the temperature is equal to or lower than T2, the process proceeds to step 123. In the cooling operation, the water supply valve 37 is operated in step 117 to supply water, and in step 118, it is determined whether or not the required water supply time S is shorter than a predetermined time S1 (for example, 20 minutes). If it is shorter than S1, it is determined in step 119 whether or not the water supply has reached a predetermined water level. If it is determined that the predetermined water level has been reached, the drain valve 36 is operated in step 120 to perform drainage. If the predetermined time S1 is exceeded, it is determined that there is some abnormality in the water supply, but the display of “abnormal water supply” is not displayed and the process proceeds to step 123 to drain all the washing water.

  If there is no abnormality in water supply, the water supply valve 37 is operated in step 121 to supply water, and then in step 122, it is determined whether or not the temperature T of the washing water is equal to or lower than a predetermined temperature T2. If it is equal to or less than T2, it is determined that the cooling is completed, and the process proceeds to step 123, where the control means 44 operates the drain valve 36 to drain all the washing water in the water receiving tub 26. If the washing water temperature is higher than T2, the process returns to step 120, and the drainage in step 120 and the water supply in step 121 are repeated.

  After all the washing water has been drained in step 123, in step 124, the control means 44 releases the lid lock 40 so that the lid 30 can be opened, and at the same time displays a release display on the lid lock display section 46h. Next, at step 125, the process proceeds to the next process.

  In addition, when the washing water is detected to be equal to or higher than a second predetermined temperature T2 (for example, 55 ° C.) when the operation is temporarily stopped by the user's intention and the lid 30 is opened during the washing process, the cooling operation is performed. After performing drainage, the lid lock 40 is released after draining.

  As described above, when water is not supplied for a predetermined time in the cooling operation after the completion of the high temperature washing process, the water is discharged without displaying “abnormal water supply”. By not leaving the accumulated state in the room, the temperature inside the rotating drum is likely to decrease, and the user's chances of coming into contact with hot washing water, laundry, and the rotating drum are reduced, so that the safety and convenience of the user are reduced. Can be improved.

(Embodiment 2)
FIG. 5 is a main part operation flowchart of the drum type washing machine according to the second embodiment of the present invention. The longitudinal sectional view, block control circuit diagram, input setting means and display means of the second embodiment will be described with reference to FIGS. 1, 2 and 3, which are the same as those of the first embodiment.

  The control means 44 is configured to drain the water after the temperature detecting means 42 detects that the washing water has dropped to the predetermined temperature T2. Other configurations are the same as those of the first embodiment.

  In the above configuration, the operation will be described with reference to FIG. Note that the same parts as those in Embodiment 1 are omitted.

  In step 118 during the cooling operation, it is determined whether or not the required water supply time S is shorter than a predetermined time S1 (for example, 20 minutes). Is determined to be higher than a second predetermined temperature T2 (for example, 55 ° C.). If the temperature is higher than T2, the operation is stopped in step 124. If it is equal to or less than T2, the process proceeds to step 126, and the entire drainage is performed. While the operation of step 124 is stopped, it is determined in step 125 whether or not the temperature T of the washing water is equal to or lower than a second predetermined temperature T2 (eg, 55 ° C.). Then, the control means 44 operates the drain valve 36 to drain all the washing water in the water receiving tank 26. If it is higher than T2, the process returns to step 124.

  After all drainage in step 126, in step 127, the control means 44 releases the lid lock 40 so that the lid 30 can be opened, and at the same time displays a release display on the lid lock display section 46h. Next, at step 128, the process proceeds to the next process.

  As described above, after detecting that the washing water has dropped to the predetermined temperature, drainage is performed, so that the drainage temperature is controlled and lowered to the predetermined temperature to improve the safety of the drainage route, and the drainage Even if the temperature of the laundry in the subsequent rotating drum and the rotating drum comes into contact with the user, the temperature can be lowered to a safe temperature, and the safety of the user can be further improved.

(Embodiment 3)
FIG. 6 is an operation flowchart of the main part of the drum type washing machine according to the third embodiment of the present invention. The longitudinal sectional view, block control circuit diagram, input setting means and display means of the second embodiment will be described with reference to FIGS. 1, 2 and 3, which are the same as those of the first embodiment.

  As shown in FIG. 1, FIG. 2, and FIG. 3, when the control means 44 proceeds to the next rinsing process after the cooling operation is completed, if the S1 water supply is not performed for a predetermined time during the water supply, A water supply abnormality display is given. Other configurations are the same as those in the first and second embodiments.

  In the above configuration, the operation will be described with reference to FIG. The same parts as those in Embodiments 1 and 2 are omitted.

  After completion of the cooling operation, the process proceeds to the next rinsing process, and in step 125, the control means 44 operates the water supply valve 37 to supply water. In step 126, it is determined whether the required water supply time S is shorter than a predetermined time S1 (for example, 20 minutes). If it is shorter than S1, it is determined in step 127 whether or not the water supply level has reached a predetermined water level. If it has reached, the flow proceeds to the next operation in the rinsing step in step 128. If the predetermined water level has not been reached, the process returns to step 125. Further, if the predetermined time is longer than S1 in step 126, the process proceeds to step 129, the operation of the water supply valve 37 is stopped, and "abnormal water supply" is displayed on the numeric display unit 46g in step 130.

  As described above, after draining the washing water, when the water supply is not performed for a predetermined time at the time of water supply in the next rinsing process, the user is in a state where the temperature in the rotating drum is low because the water supply abnormality is displayed. Thus, it is possible to cope with abnormal water supply, reduce the chances of contact with hot washing water, laundry and a rotating drum, and further improve the safety of the user.

As described above, the drum type washing machine according to the present invention does not display “abnormal water supply” when the water supply is not performed for a predetermined time in the cooling operation in the drainage process after the completion of the high temperature washing process. Therefore, if the high temperature water is not left in the rotating drum, the temperature inside the rotating drum is likely to decrease, and the user has the opportunity to come in contact with hot washing water, laundry and the rotating drum. Therefore, it is possible to improve the safety and convenience of the user, so that it can be used for a drum type washing machine having a drying function.

The longitudinal cross-sectional view of the drum type washing machine in Embodiment 1 of this invention Same block circuit diagram Enlarged front view of the input setting means and display means Same part operation flowchart Main part operation | movement flowchart of the drum type washing machine in Embodiment 2 of this invention Main part operation | movement flowchart of the drum type washing machine in Embodiment 3 of this invention Vertical section of a conventional drum-type washing machine

24 Rotating drum 26 Water receiving tank 27 Rotating shaft (Rotating center shaft)
28 Motor 30 Lid (door)
32 Washing machine body 36 Drain valve (drainage means)
37 Water supply valve (water supply means)
39 Water level detection means 41 Heater (heating means)
42 Temperature detection means

Claims (3)

A cylindrical rotating drum with a bottom having a first opening in the front and a rotation axis in the horizontal direction or in an inclined direction, and a second opening corresponding to the first opening, and the rotating drum A bottomed cylindrical water receiving tub that is rotatably included, and a washing machine that has a third opening corresponding to the first opening and the second opening that supports the water receiving tub in a swingable manner. A main body, a door body that is provided in the washing machine main body and opens and closes a third opening for putting laundry in and out of the rotary drum, a motor that rotationally drives the rotary drum, and a water receiving tub a heating means for heating the washing water, a temperature detecting means for detecting the temperature of the washing water in the water tray tank, a water supply means for controlling the water supply of the washing water into the water receiving tank, the water tub The water level detecting means for detecting the level of the washing water inside, and communicated with the bottom of the water receiving tank A drainage means provided in the middle of the water path for controlling the drainage of the wash water in the water receiving tub, and the motor, heating means, water supply means and drainage means for inputting data from the temperature detection means and the water level detection means Control means for controlling a series of washing, rinsing, and dehydrating operations, and a display means, and the control means controls the heating means to heat the washing water to a first predetermined temperature or higher. a hot washing step for washing Te, the drainage stroke after the hot washing cycle ends, until said heated wash water becomes a second predetermined temperature, water supply and drainage by controlling the water supply means and drainage means A drum-type washing machine having a cooling process for performing a repetitive cooling operation and draining water without displaying a water supply abnormality when water is not supplied for a predetermined time in the cooling process. The drum-type washing machine according to claim 1, wherein the control means is configured to discharge the water after the temperature detection means detects that the washing water reaches a second predetermined temperature. The drum-type washing machine according to claim 1 or 2, wherein the control means displays a water supply abnormality when water has not been supplied for a predetermined time during water supply in the next rinsing step after draining the wash water.