JP2012170688A - Drum washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drum washing machine that uses hot water and is highly safe for a user.SOLUTION: A drum washing machine includes: a water circulation system 56 for jetting to circulate washing water in a water tub 42 from a jet port 70 provided on the inside front side of the water tub 42 into a rotary drum 43 by a circulation pump 67; a hot water heater 72 for heating washing water arranged at the bottom of the water tub 42; temperature detection means 73 for detecting a temperature of washing water in the water tub 42; a lint filter 65 disposed on the inside lower front side of a washing machine housing 41 and removable from outside; control means 82 for controlling each of the processes including washing, rinsing, and dewatering. In a washing process, while the hot water heater 72 is energized and the circulation pump 67 is driven and when the temperature of washing water detected by the temperature detection means 73 becomes a prescribed temperature or greater, the control means 82 stops driving of the circulation pump 67 only and performs prescribed process operations. Thus, the user is prevented from being burned and a high safety can be achieved.

Description

  The present invention relates to a drum type washing machine for washing laundry contained in a rotating drum.

  Conventionally, this type of drum type washing machine has improved the cleaning power by discharging heated washing water onto the laundry. (For example, refer to Patent Document 1).

  FIG. 4 shows a longitudinal sectional view of a conventional drum-type washing machine described in Patent Document 1. As shown in FIG.

  In FIG. 4, a bottomed cylindrical outer tub 6 is supported in the housing 1 in a state of being inclined downward from the front side to the back side of the housing 1 by a suspension structure (not shown). The outer tub 6 is composed of the outer tub main body 2 and the outer tub cover 3, and is connected and fixed in a watertight manner through the first packing member 4 at the connection portion. The outer tub 6 includes a rotatable drum 5 formed in a bottomed cylindrical shape so as to be freely rotatable. An opening / closing door 8 is provided at the front of the housing 1. A first water supply valve 9 and a second water supply valve 11 for supplying washing water are provided at the upper rear of the housing 1.

  The rotating drum 5 is rotationally driven by a drive motor 7 attached to the outer side of the outer tub main body bottom 2c of the outer tub 6, and its rotational speed and direction are variable. The inner bottom of the outer tub 6 is provided with a hot water heater 36 made of a sheathed heater or the like to heat the washing water.

  The washing water heated in the washing process enters from the water intake 20 formed on the inner bottom surface of the outer tub 6 by the water flow generated by the rotation of the rotating drum 5, and the first circulation water channel 22 and the first circulation water channel 22. The second circulating water channel 26 and the third circulating water channel 27 communicating with the circulating water channel 22 are discharged from the discharge port 32 to the laundry in the rotary drum 5.

JP 2007-117135 A

  However, in the above-described conventional configuration, when the user opens the open / close door, the hot water circulates in a state where the washing water is circulated at a high temperature, for example, heated to about 55 ° C. or more and discharged into the rotary drum. There was a problem in terms of safety that there is a risk of burns in contact with water.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object thereof is to provide a drum-type washing machine having high safety and preventing burns for a user.

The present invention solves the above-described conventional problems, and includes a rotating drum formed in a bottomed cylindrical shape, a water tank that rotatably includes the rotating drum, a motor that rotationally drives the rotating drum, and the water tank Water supply means for supplying water, water level detection means for detecting the water level in the water tank, and washing water in the water tank are circulated by being injected into the rotating drum from an outlet provided in the water tank by a circulation pump. A path of the water circulation system, a hot water heater for heating the washing water disposed at the bottom of the water tank, a temperature detection means for detecting the temperature of the washing water in the water tank, an operation display means comprising an input setting means and a display means The washing machine housing is removable from the outside of the washing machine and through which the washing water passes when the circulation pump is driven, and the motor, the water supply means, the circulation pump, the hot water heater, etc. are controlled to wash and rinse. Control means for controlling each process such as dehydration, and the control means is energized to the warm water heater in the washing process, and the washing water temperature detected by the temperature detecting means is predetermined while the circulation pump is driven. When the temperature is higher than the temperature, only the circulation pump is stopped and a predetermined stroke operation is performed. As a result, when the wash water is heated above the specified temperature, the circulation pump stops driving, so even if the user loosens or removes the lint filter, the risk of burns is low and safety is high. Can be realized.

  In the drum type washing machine of the present invention, the driving of the circulation pump is stopped in a state where the washing water is heated to a predetermined temperature or higher, so that high safety can be realized.

The longitudinal cross-sectional view of the drum type washing machine in embodiment of this invention Block diagram of the drum type washing machine Control flow chart of the drum type washing machine Vertical section of a conventional drum-type washing machine

  A first invention is a rotating drum formed in a bottomed cylindrical shape, a water tank that rotatably includes the rotating drum, a motor that rotationally drives the rotating drum, a water supply means that supplies water into the water tank, A water level detecting means for detecting a water level in the water tank, a water circulation path for circulating the washing water in the water tank by injecting it into the rotary drum from an outlet provided in the water tank by a circulation pump, and the water tank A warm water heater for heating the wash water disposed at the bottom of the water tank, a temperature detection means for detecting the wash water temperature in the aquarium, an operation display means comprising an input setting means and a display means, and from the outside of the washing machine housing A lint filter that is removable and allows washing water to pass when the circulation pump is driven, and the motor, water supply means, circulation pump, hot water heater, etc. are controlled to control each process such as washing, rinsing, and dehydration. And when the washing water temperature detected by the temperature detection means becomes equal to or higher than a predetermined temperature while the circulation pump is being driven and the circulation pump is in operation, the control means When the washing water is heated to a predetermined temperature or more by stopping the driving of the pump and performing the predetermined stroke operation, the driving of the circulation pump is stopped. Even if it is loosened or removed, only a small amount of water flows out from the vicinity of the lint filter, so that the risk of burns to the user is low and high safety can be realized.

  In the second aspect of the invention, in particular, the control means of the first aspect of the invention is such that when the water level drops at a predetermined speed or more in the washing process, the operation of the process is stopped and an abnormality is displayed on the display means. Thus, if the user should completely remove the lint filter and a large amount of washing water has been ejected, the user can be informed of the abnormal state appropriately.

  Hereinafter, embodiments of the invention will be described with reference to the drawings. Further, the present invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 shows a longitudinal sectional view of a drum type washing machine in an embodiment of the present invention.

A water tub 42 is disposed inside the washing machine housing 41 so as to be swingable. A rotating drum 43 is rotatably disposed within the water tub 42. A rotation shaft (rotation center shaft) 44 is provided in the horizontal direction at the rotation center of the rotating drum 43, and a motor 45 attached to the rotation shaft 44 in the vicinity of the back side of the water tank 42 is connected via a belt 46. The rotary drum 43 is rotated by 45 in the forward and reverse directions. Several protrusion plates 47 for stirring the laundry are provided on the inner wall surface of the rotating drum 43. In addition, a large number of water passage holes 48 are provided on the entire outer periphery of the rotating drum 43.

  The water tank 42, the rotating drum 43, the motor 45, and the like constitute a vibration water tank unit 49. The water tank unit 49 is formed by a plurality of spring bodies 50 from above the washing machine housing 41, and the washing machine. Anti-vibration is supported by a plurality of anti-vibration dampers 51 from the bottom of the housing 41.

  Further, the opening provided in the washing machine housing 41 on the front side of the water tub 42 is covered with a lid 52 so that the laundry can be opened and closed. By opening the lid 52, the laundry is put into and out of the rotary drum 43 through the clothing entrance 53. I can do it.

  In addition, this drum type washing machine has a function of automatically controlling the motor 45, the water supply system 54, the drainage system 55, and the water circulation system 56 according to the mode setting and control program to perform at least a washing process, a rinsing process, and a dehydrating process. is doing.

  The water supply system 54 includes a first water supply hose 59 or a second water supply hose by opening and closing the first electromagnetic valve 57 (first water supply means) or the second electromagnetic valve 58 (second water supply means). Water can be supplied from the water supply path 62 into the water tank 42 in a timely manner through the detergent storage 61 that passes through 60 and stores a detergent and a soft finish and stores a drawer (not shown) that can be pulled out from outside.

  The drainage system 55 is installed in the filter case 88 via a drainage pipe 64 connected to the bottom of the water tank 42 when necessary, such as at the end of the washing process or at the end of the rinsing process, by driving the drainage pump 63. After passing through a lint filter 65 for collecting lint that can be removed from the lower front outside of the washing machine housing 41 by a knob 89, it passes from the inside of the machine to the outside of the machine through the drainage pump 63. The drainage hose 66 can be drained.

  The water circulation system 56 circulates the water in the water tank 42 as necessary during the pre-washing process, the washing process, the rinsing process, and the like, thereby preventing the premature dissolution and unevenness of the detergent and improving the function of easy washing.

  The water circulation system 56 drives the circulation pump 67 to pass the washing water in the water tank 42 through the drain pipe 64 through the filter case 88, and the inflow side path 68 to the circulation pump 67 and the circulation pump 67. And it repeats discharging into the rotating drum 43 as circulating water shown by the solid line arrow from the outlet 70 on the front side of the water tank 42 through the discharge side path 69 from the circulation pump 67. A plurality of jet outlets 70 are provided in the circumferential direction, and the circulating water is discharged from all directions of the circumference.

  The recess 71 formed at the bottom of the water tank 42 is provided with a hot water heater (heating means) 72 such as a sheathed heater for heating the washing water in the horizontal direction. By discharging the washing water into the rotating drum 43 as described above, the washing water is sprinkled on the laundry and the washing water is circulated again. Since the heated washing water is sprinkled on the laundry, the molecular activity of the washing water is increased and the activation of the detergent is increased, so that the washing power can be increased and washing unevenness can be reduced. In the vicinity of the hot water heater 72, a temperature detection means 73 such as a thermistor for detecting the water temperature is provided.

  In addition, an air trap 74 is configured on the side wall of the outer periphery of the bottom of the outer tub 42 in communication with the drain pipe 64. The air trap 74 is provided inside the upper portion of the washing machine housing 41 by an air pipe 75, and is provided with a pressure sensor or the like. It is connected to the constructed water level detection means 76, and can detect the water level in a plurality of stages by the water pressure of the washing water supplied into the outer tub 42.

  In addition, the rear upper part of the detergent container 61 provided in the upper part of the washing machine housing 41 and the upper part of the water tank 42 are connected by a connecting hose 77, and the air in the water tank 42 is pressurized by the stroke operation operation. It plays the role of pulling out.

  In addition, vibration detection means 78 of an acceleration sensor that detects vibration of the water tank unit 49 is disposed on the rear surface of the upper surface of the water tank 42, and is not an acceleration in one direction, but front and rear (X axis direction), left and right (Y axis direction). ), Vibrations in the three axial directions (up and down (Z-axis direction)) are detected to control the operation. This is because the actual vibration of the water tank unit 49 is not necessarily limited to one direction, and is therefore detected with high accuracy using a multi-axis acceleration sensor.

  The mode such as the driving course and various functions are selected by the user by inputting to the input setting means 80 from the operation display means 79 provided at the upper front of the washing machine housing 41, and inside the upper portion of the washing machine housing 41. The arranged control device 81 is displayed on the display means 96 (see FIG. 2) on the operation panel 79 based on the input information to notify the user.

  FIG. 2 is a block circuit diagram of the drum type washing machine in the embodiment of the present invention.

  In FIG. 2, the control means 82 of the control device 81 is constituted by a microcomputer or the like, and starts operating when power is supplied from the commercial power supply 83 by turning on the power switch 84, a water level detection means 76, a temperature detection means 73, The outputs of the cloth amount detection means 85 and the vibration detection means 78 are input, and the setting contents are displayed on the display means 96 based on the contents set by the user input in the input setting means 80, and the bidirectional thyristor, The operation of the motor 45, the hot water heater 72, the first electromagnetic valve 57, the second electromagnetic valve 58, the drainage pump 63, the circulation pump 67, etc. is controlled and washed through a load driving means 86 constituted by a relay or the like. Control each step of rinsing and dehydration. If there is any abnormality in the operation, the display means 96 displays that it is abnormal and notifies the notification means 87. The input setting means 80 and the display means 96 constitute an operation display means 79.

  About the drum type washing machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  FIG. 3 is a control flowchart of the Cotton course, which is a standard operation course of the drum type washing machine in the embodiment of the present invention, and mainly describes the washing process.

  In FIG. 3, first, the user opens the lid 52, puts clothes into the rotating drum 43, and starts, and when the Cotton course is selected and started (YES in Step S <b> 1), the cloth amount detecting means 85 inputs it. The detected cloth amount is detected (step S2), and in step S3, the control means 82 displays on the display means 96 the water level corresponding to the cloth amount and the detergent amount with respect to the water level at that water level.

In step S4, when the user puts the displayed amount of detergent into the drawer portion of the detergent storage unit 61, the first electromagnetic valve 57 is activated to start water supply, and the tap water is put together with the detergent in the detergent storage unit 61. Water is supplied into 42 (step S5). In the water supply process of step S5, in order to improve the balance of the laundry in the rotating drum 43 and promote the dissolution of the detergent, washing with foam is performed in which the rotating drum 43 rotates at a low speed (step S6). Water supply (step S7) is performed to compensate for the lowered water level that has permeated into the object. The water level is always detected and monitored by the water level detection means 76 (step S8). When the predetermined amount of water supply ends, the water supply stirring A starts in step S9.

  In the water supply agitation A, the motor 45 is driven, the rotating drum 43 rotates at a low speed, and the agitation is performed by tapping washing that lifts the laundry and drops its own weight. At the same time, the circulation pump 67 is driven for 1 minute, and the washing water in the water tub 42 is sprayed as circulating water from the spout 70 at the front part of the water tub 42 toward the laundry in the rotating drum 43 to promote the dissolution of the detergent. (Step S10) Next, when the circulation pump 67 stops for 1 minute, the second electromagnetic valve 58 is opened and water is supplied to a predetermined water level (Step S11). The reason why the circulation pump 67 is stopped during the water supply is to correctly detect the water level in the water tank 42. The water level is always detected and monitored by the water level detection means 76 (step S12). Each one minute is repeated, and when a predetermined time elapses (step S13) and the clothes are removed to some extent, the process proceeds to water supply stirring B in step S14.

  In the water supply agitation B, the motor 45 is driven, the rotating drum 43 is rotated for 4 minutes longer than the water supply agitation A, and the laundry is agitated. At the same time, the second electromagnetic valve 58 is opened and water is supplied to a predetermined water level. At this time, the circulation pump 67 is stopped (step S15). At the same time, when the water level detected in step S16 reaches a predetermined water level rank (step S17), the hot water heater 72 is turned on (step S18), and heating of the washing water is started. This heating is stopped when the set temperature is reached, and when the temperature decreases, the heating is repeated until the washing process is completed. Next, it moves to the water supply stirring C of step S19.

  In the water supply stirring C, similarly to the water supply stirring B, the rotating drum 43 rotates and the laundry is stirred. At the same time, the circulation pump 67 is driven, and the wash water in the water tank 42 is injected into the rotary drum 43 from the outlet 70 at the front of the water tank 42 as circulating water (step S20). At this time, since the washing water is in a heated state, the washing water sprayed into the rotating drum 43 makes it easy for the dirt attached to the laundry to float, and the molecular activity of the washing water increases. Since the activation of the detergent increases, the cleaning power can be increased and washing unevenness can be reduced.

  Note that the temperature of the washing water is always detected and monitored by the temperature detecting means 73. When the temperature becomes equal to or higher than a predetermined temperature (for example, 55 ° C.) (NO in step S21), only the circulation pump 67 is stopped (step S22). It is possible to remove the lint filter 65 from the outside of the lower front of the washing machine housing 41 at any time, and the user should loosen or remove the lint filter 65 with the filter knob 89 while the circulation pump 67 is in operation. Then, due to the rotational speed of the circulation pump 67, the circulating water may jump out of the filter case 88 and hit the user, causing burns.

  And even if the circulation pump 67 is stopped, when the laundry stirring for 4 minutes is finished (step S23), or the washing water temperature is lower than the predetermined temperature (YES in step S21), the laundry stirring for 4 minutes. When the predetermined time has not elapsed (NO in step S25), the feed water agitation B is performed, and this 4 minute feed water agitation B and 4 minute water feed agitation C are repeated for a predetermined time. When the time has elapsed (YES in step S25), the hot water heater 72 is also turned off (step S26), and the washing process ends.

  As in Steps S8, S12, and S16, the water level is always detected and monitored by the water level detection means 76 (Step S27) and stored in the control means 82 (Step S28). When the lint filter is loosened or removed by the filter knob 89, the washing water is ejected and the water level is rapidly lowered. When the decrease in the water level is equal to or higher than the predetermined speed and it is determined that there is an abnormality (YES in Step S29), the operation is stopped, the display means 96 displays that it is abnormal, and the notification means 87 notifies ( Step S30).

  In the next process, the rinse (1) process, the drainage pump 63 is driven to drain the water in the water tank 42, and then intermediate dehydration is performed. Centrifugal force is applied to the laundry to remove moisture from the laundry. After the separation, the water is supplied to the washing water level, and the motor 45 is driven to start rinsing and stirring for removing the detergent liquid from the laundry (step S31).

  In the rinsing process (2), that is, the final rinsing process, drainage and intermediate dewatering are performed in the same manner as in the rinsing process (1), and rinsing and stirring are started (step S32).

  In the dehydration process of step S33, after rinsing is completed, the drainage pump 63 is driven to drain the water in the water tank 42, and then the motor 45 is driven to rotate the rotating drum 43 at high speed, thereby applying centrifugal force to the laundry. By giving, it separates the moisture from the laundry for a predetermined time, and the course ends.

  As described above, in the present embodiment, the driving of the circulation pump is stopped when the washing water is heated to a predetermined temperature or higher, so even if the user loosens or removes the lint filter by any chance, there is a burn. It is possible to achieve high safety.

  Also, if the water level drops above a predetermined speed, it is determined that the lint filter has been removed, the stroke operation is stopped, and the abnormality display and notification are made. I can let you know.

  As described above, the drum type washing machine according to the present invention can improve safety by detecting and controlling the temperature of the washing water, so that other washing machines having a hot water heater, a circulation pump, etc. It can be applied to any use.

41 Washing machine housing 42 Water tank 43 Rotating drum 45 Motor 54 Water supply system (water supply means)
56 water circulation system 65 lint filter 67 circulation pump 70 spout 72 hot water heater 73 temperature detection means 76 water level detection means 79 operation display means 80 input setting means 82 control means 85 display means 87 notification means

Claims (2)

A rotating drum formed in a bottomed cylindrical shape, a water tank that rotatably includes the rotating drum, a motor that rotationally drives the rotating drum, water supply means for supplying water into the water tank, and a water level in the water tank. A water level detection means for detecting, a water circulation path through which washing water in the water tank is circulated by being injected into the rotary drum from an outlet provided in the water tank by a circulation pump, and disposed at the bottom of the water tank A warm water heater for heating the wash water; a temperature detection means for detecting the temperature of the wash water in the aquarium; an operation display means comprising an input setting means and a display means; and the circulating pump removable from the outside of the washing machine housing A lint filter through which washing water passes when driven, and control means for controlling each step of washing, rinsing, dehydration, etc. by controlling the motor, water supply means, circulation pump, hot water heater, etc. When the washing water temperature detected by the temperature detecting means is higher than a predetermined temperature while the circulating pump is being driven and the circulating water pump is being driven during the washing process, the control means only drives the circulating pump. A drum-type washing machine that stops and performs a predetermined stroke operation. 2. The drum type washing machine according to claim 1, wherein the control means stops the stroke operation and displays an abnormality on the display means when the water level drops at a predetermined speed or higher in the washing stroke.