JP2008079762A - Washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain an improvement in rinsing performance and dewatering performance, a reduction in drying time and a reduction in energy comsumption by preventing the situation such that, since the area of a valley part is large when the valley part is provided on a washing and dewatering tub, clothes enter there to close a hole provided on the valley part and water is not easily and smoothly discharged to the outside of the washing and dewatering tub, and it takes time to separate clothes after the end of dewatwering. <P>SOLUTION: The washing and dewatering tub which is rotatably provided inside an outer tub 2 and has many water discharge holes 3 on a peripheral wall part 4a, has many projection parts 5 which is projected inward at the peripheral wall part 4a, and for which an intersection line with the peripheral wall part 4a is roughly circular, and the plurality of water discharge holes 3 are disposed roughly equally in the circumferential direction centering on the projection part 5 around the projection part 5. Thus, water discharged from clothes by centrifugal force during dewatering is smoothly discharged to the outside of the washing and dewatering tub. Also, the clothes after the end of dewatering is ended are easily pulled off from the wall surface of the washing and dewatering tub. Thus, the rinsing performance and the dewatering performance are improved, the drying time is shortened and the energy is saved. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to the shape of a washing and dewatering tank of a washing machine that performs from washing to dehydration or drying.

  Conventionally, this type of washing machine includes a drum-type washing machine that performs washing in a washing / dehydrating tub 51 that stores clothes rotatably provided by a rotation shaft set in a horizontal direction. Among them, in order to improve the dewatering performance, the peripheral wall of the washing and dewatering tub 51 is provided with a projection 54 projecting toward the center in the depth direction of the tub 51 and a hole 56 in its trough 55. (For example, refer to Patent Document 1).

  As shown in FIGS. 6 and 7, the drum-type washing machine described in this publication has a washing / dehydrating tub 51 that is rotatably controlled in the main body 50 so that its rotation axis is in a horizontal direction. Arranged in the tank 52. The outer tub 52 is provided with driving means 53 for rotating the washing / dehydrating tub 51. By rotating the washing and dewatering tub 51 by the driving means 53, the laundry accommodated in the tub 51 is washed and dehydrated.

  In this dehydration process, water contained in the clothes is separated by centrifugal force, but since the convex portion 54 is provided, a component force in the direction of the wall surface of the centrifugal force can be generated. Water is discharged from the hole 56 provided in the valley 55 to the outside of the washing and dewatering tank.

  Also, the washing machine that performs drying dries the clothes by peeling off the clothes stuck to the washing and dewatering tank by centrifugal force after dehydration, and supplying warm air to the washing and dewatering tank 51 while stirring the clothes. .

In order to improve the dewatering performance, there is a washing machine in which a large number of round or oval convex portions projecting inward are formed on the peripheral wall of the washing and dewatering tub (see, for example, Patent Document 2).
JP-A-56-8095 Japanese Patent Laid-Open No. 4-197291

  However, in the conventional configuration, since the area of the valley is large, there is a problem that clothing enters into the valley, closes the hole provided in the valley, and the water is not easily drained out of the washing / dehydration tank, and has a convex part. However, since the drain hole is not uniformly arranged around the convex portion, there is a problem that water is not effectively discharged.

  For this reason, in the rinsing process, there is a problem that if the amount of water remaining in the clothes after dehydration is large, rinsing is insufficient, or the amount of water increases to perform sufficient rinsing.

  In addition, when drying is performed, since the amount of water contained in the clothes after dehydration is large, it takes time, and the power consumption increases.

  Furthermore, when clothing entered the valley, there was also a problem that the clothing was difficult to peel off from the wall after completion of dehydration. For this reason, when drying is performed, it takes time to peel off the clothes, which causes a problem that the drying efficiency is deteriorated.

  The present invention solves the above-described conventional problems, and smoothly drains water discharged from the clothes by centrifugal force during dehydration to the outside of the washing and dehydrating tank, and the clothes after the dehydration are finished An object of the present invention is to provide a washing machine having a structure that can be easily peeled off from a machine, improving rinsing performance and dewatering performance, shortening drying time, and saving energy.

  In order to solve the above-described conventional problems, the washing machine of the present invention has a large number of substantially circular convex portions projecting inwardly on the peripheral wall portion of the washing and dewatering tub, and the periphery around the substantially circular convex portion. Are provided with a large number of drain holes uniformly.

  Thus, in the dehydration process, when the washing and dewatering tub is rotated at a high speed and the water is squeezed out of the clothes by centrifugal force, a component is generated toward the drain hole due to the convex portion, and the water is also washed and washed. It becomes easy to flow smoothly out of the dehydration tank. Therefore, the amount of water contained in the clothes after the completion of dehydration can be reduced, and in the rinsing step, if the clothes are rinsed with the same amount of water, the clothes can be well rinsed. In addition, after the last dehydration, if it is dried in the sun, it dries quickly, and if it is dried as it is, the amount of moisture contained in the clothes is small and the clothes are easily peeled off from the washing and dehydrating tank. Since warm air can be evenly applied to clothing from an early stage, drying time is short, and the amount of power consumption is correspondingly reduced, thereby achieving energy saving.

  The washing machine of the present invention has a large number of convex portions projecting inwardly on the peripheral wall portion of the washing and dewatering tub and having a substantially circular intermeshing line with the peripheral wall portion, and water drainage holes project around the convex portion. As a result, the water drained from the clothes by the centrifugal force at the time of dehydration is drained out of the washing / dehydration tank efficiently and smoothly after the dehydration is completed. The clothes can be easily peeled off from the wall surface of the washing / dehydrating tank, so that the rinsing performance and the dewatering performance can be improved, the drying time can be shortened, and the energy can be saved.

  According to a first aspect of the present invention, there is provided a main body, an outer tub supported in the main body, a washing / dehydrating tub rotatably provided in the outer tub and having a plurality of drain holes in a peripheral wall portion, and the washing / dehydrating tub. Drive means for rotationally driving the dewatering tub, the washing and dewatering tub having a plurality of protrusions projecting inwardly on the peripheral wall portion and having a substantially circular intermeshing line with the peripheral wall portion, Around the periphery, a washing machine is provided with a plurality of drain holes approximately evenly in the circumferential direction centering on the convex part, so that water separated from the clothes by centrifugal force during dehydration can be washed and removed smoothly. Since it is discharged out of the water tank, the amount of moisture remaining in the clothes can be reduced, and the clothes are pushed up to the convex part, making it easy to peel off from the wall surface of the washing and dewatering tank, improving rinsing performance and dewatering performance, drying time Can be shortened and energy can be saved.

  In the second invention, in particular, the convex portion of the washing machine of the first invention is formed in a conical cross section, so that water separated from the clothing by centrifugal force during dehydration can be smoothly washed and dewatered. Since it is discharged to the outside, the amount of moisture remaining in the clothing can be reduced, and the clothing is pushed up to the convex part, so that it can be easily peeled off from the wall surface of the washing / dehydrating tank, improving the rinsing performance and dewatering performance, and the drying time. Shortening and energy saving can be achieved.

  According to a third aspect of the invention, in particular, the convex portion of the washing machine of the first aspect of the invention has a cross-sectional shape formed in a dome shape, so that water separated from clothing by centrifugal force during dehydration can be smoothly washed and dehydrated. Since it is discharged to the outside, the amount of moisture remaining in the clothing can be reduced, and the clothing is pushed up to the convex part, so that it can be easily peeled off from the wall surface of the washing / dehydrating tank, improving the rinsing performance and dewatering performance, and the drying time. Shortening and energy saving can be achieved.

  According to a fourth aspect of the invention, in particular, the washing machine according to any one of the first to third aspects includes a first convex portion and a second convex portion, which are adjacent convex portions, and the first convex portion. Among the drain holes provided in the periphery of the part, the drain hole located between the second convex parts, and between the first convex part in the drain holes provided around the second convex part. Since the water drain holes that are positioned are the same water drain hole, the water drain holes between the first convex portion and the second convex portion that are adjacent convex portions may be one or one row. Therefore, as compared with the case where it is provided in a plurality of rows, the configuration of the mold can be simplified, and the strength between the first convex portion and the second convex portion can be improved, and the first convex portion can be improved. Since the water pushed out by the centrifugal force of rotation by the first and second protrusions is surely discharged from the drain hole between the first and second protrusions, the rinsing performance and the dewatering performance are improved. Dry It can be shortened, and energy saving of time.

  In the fifth invention, in particular, a plurality of convex portions of the washing machine according to any one of the first to fourth inventions are arranged in a substantially straight line inclined at a predetermined angle with respect to the rotation center direction of the washing and dewatering tub. A plurality of rows of the convex portions are arranged, and a plurality of rows of the convex portions arranged substantially linearly in a substantially right angle direction with respect to the substantially linear shape inclined at the predetermined angle. With this arrangement, the drain holes are arranged in a simple configuration with the drain holes around the convex portions being shifted from each other with respect to the rotation center direction of the washing / dehydrating tub. By disposing the drain holes around the convex portions with respect to each other, the water discharged from the drain holes is displaced on the inner wall of the outer tub with respect to the rotation center direction of the washing / dehydrating tub. Because it hits, the part that does not hit the inner wall of the outer tub can be reduced as much as possible, and the inner wall of the outer tub is washed with dehydrated water That the area can be a a large, to reduce the area of contamination on the inner wall of the outer tub is attached, it is possible to suppress the mold occurs on the inner wall of the outer tub as much as possible. Furthermore, since the convex portions are arranged in the adjacent rows so as to be displaced in the front-rear direction with respect to the rotation center direction, when cut along a plane perpendicular to the rotation center direction, there is always a convex portion in the cross section. Therefore, the strength against the moment in the rotation center direction of the washing / dehydrating tub can be improved.

  According to the sixth aspect of the invention, in particular, the convex part of the washing machine according to any one of the first to fourth aspects of the invention is formed by lowering the height on the opening side for putting in clothes and increasing the height on the bottom side. Efficient dehydration of clothing on the bottom side where clothes easily collect than clothing on the inlet 11 side can realize uniform dewatering performance from the inlet 11 side to the bottom side of the washing and dewatering tank 4 and reduce unevenness in dehydration In addition, the drying time can be shortened and energy can be saved.

  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 sectional view of a drum type washing machine according to the first embodiment of the present invention.

  An outer tub 2 is supported in the main body 1 by a suspension structure (not shown), and a washing / dehydrating tub 4 having a large number of drain holes 3 in a peripheral wall portion 4a is rotatably arranged in the outer tub 2. The peripheral wall 4a of the washing / dehydrating tub 4 is provided with a convex part 5 in which the intermeshing line with the peripheral wall 4a protruding inwardly forms a substantially circular shape. A motor 6 that is a driving means for driving the washing and dewatering tub 4 is provided on the bottom rear surface of the outer tub 2, and a rotor 6 a of the motor 6 is fixed to a rotating shaft 7, and the rotating shaft 7 is rotatably supported by a bearing 8. The washing and dewatering tub 4 is driven to rotate in the forward and reverse directions. The clothes 10 are efficiently lifted and stirred by the stirring baffle 9 provided on the peripheral wall 4a in the washing and dewatering tub 4 during the forward and reverse rotation.

  A fluid balancer 12 is provided on the input side 11 of the washing / dehydrating tank 4 to correct the bias of the garment 10 when the washing / dehydrating tank 4 rotates to reduce vibration.

  A front surface of the main body 1 is provided with a substantially circular insertion port 11 for taking in and out the garment 10 and a door 1a for opening and closing the opening. The opening of the outer tub 2 facing the charging port 11 is connected to the main body 1 by a packing 13 while securing an airtight structure.

  FIG. 2 shows a configuration of a drum type washing machine having a drying function. Blowing means 14 for supplying drying air to the washing and dewatering tub 4 is provided in a substantially upper part of the main body 1, and a heating means 15 is provided on the downstream side of the blowing means 14. The air blowing means 14 and the heating means 15 are provided in the circulation duct 16. The downstream side of the circulation duct 16 communicates with a supply port 17 provided on the bottom side of the outer tub 2, and the upstream side communicates with an exhaust port 18 provided on the peripheral wall of the outer tub 2. A dehumidification duct 19 and a circulation duct 16 are integrally formed on the side peripheral surface of the outer tub 2.

  When the air blowing means 14 provided in the circulation duct 16 is rotationally driven, the air in the outer tub 2 is discharged from the exhaust port 18 into the dehumidification duct 19, so that the air including the moisture in the washing / dehydrating tub 4 is surrounded by the surrounding air. A large number of drain holes 3 formed on the surface exit into the outer tub 4 and are discharged to the dehumidifying duct 19. Into the dehumidifying duct 19, water is injected from the water injection nozzle 21 by opening a water injection valve (not shown), the air is cooled by water, and the water vapor contained in the air is condensed to dehumidify. The water that has cooled the air and the water generated by condensation flow down in the outer tub 2 and are discharged to the outside through the drain port 22.

  The air blown from the blowing means 14 is heated by the heating means 15 in the circulation duct 16 to become hot air at a predetermined temperature and is blown into the outer tub 2 from the supply port 17. The bottom surface of the washing and dewatering tub 4 is provided with a vent hole 20 having a plurality of openings on the circumference, and warm air blown from the supply port 17 into the outer tub 2 is washed from the vent hole 20. It is fed into the cum dewatering tank 4. The warm air blown from the bottom side of the washing / dehydrating tub 4 touches the clothing and removes the moisture, so that drying of the clothing is promoted, and the air containing the moisture is exhausted again from the exhaust port 18 into the dehumidifying duct 19. .

  The dry air discharged from the washing / dehydrating tub 4 circulates through the exhaust port 18, the circulation duct 16, the dehumidifying duct 19, the blowing unit 14, the heating unit 15, the supply port 17, the vent 20, and the washing / dehydrating tub 4. It has become. The above flow of drying air is indicated by arrows in FIG. The clothing is dried by repeating the air circulation with dehumidification and heating.

  In order to effectively introduce the drying air flowing through the circulation duct 16 into the washing / dehydrating tub 4, a non-contact seal portion is formed by the outside of the bottom wall surface of the washing / dehydrating tub 4 and the inside of the outer tub 2. ing. The non-contact seal portion is provided so as to enclose the vent 20 and surround the rotating shaft 7 of the washing / dehydrating tub 4. A plurality of substantially circular convex ribs 23 projecting inward from the wall surface of the outer tub 2 and a plurality of substantially circular convex ribs 24 projecting outward from the bottom wall surface of the washing / dehydrating tub 4. The seal part is constituted by the combination. The substantially circular convex ribs 23 and 24 are configured in a labyrinth shape in which valleys and peaks enter each other without contact.

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

  First, in the washing process, the clothes 10 and the detergent and the washing water are supplied to the washing and dewatering tub 4, the driving means 6 is operated, and the washing and dewatering tub 4 is operated forward and reverse to perform washing for a predetermined time.

  When the washing / dehydrating tub 4 is rotated, the garment 10 is lifted upward by the centrifugal force generated by the rotation of the washing / dehydrating tub 4 and the action of the stirring baffle 9. The weight falls toward the bottom surface of the washing / dehydrating tub 4 and the washing / dehydrating tub 4 is effectively washed and acted on the entire garment 10, so that washing with less washing unevenness can be realized.

  Next, a rinsing step is performed. The rinsing process is performed by supplying water into the washing / dehydrating tub 4 after a dehydrating process of rotating the washing / dehydrating tub 4 at a high speed.

  The dehydration step before rinsing is performed by squeezing the detergent liquid contained in the garment 10 from the garment 10 by centrifugal force. The water separated from the clothing 10 is discharged from the drain hole 3 of the washing and dewatering tub 4, passes through the outer tub 2, and is drained out of the main body 1 through the drain port 22. Then, water is newly supplied into the washing / dehydrating tub 4, the driving means 6 is operated, and the washing / dehydrating tub 4 is operated in the forward and reverse directions to dilute the detergent components remaining in the garment 10 while stirring the garment 10. Is going on.

  At this time, since the projecting portion 5 that protrudes inwardly and has a substantially circular line with the peripheral wall portion 4a is provided on the peripheral wall portion 4a of the washing and dewatering tub 4, the washing and dewatering tub 4 is rotated at high speed. At this time, a component of centrifugal force is generated toward the drain hole, and water can easily flow out of the washing and dewatering tub 4. Therefore, it is possible to reduce the amount of water containing the detergent component contained in the clothes after the dehydration. And since there is little water content containing the detergent component which remained in the clothing 10, in the case of the same water supply amount, a detergent part will be diluted and a rinse will be performed well. In addition, when rinsing to the same dilution, the amount of new water can be reduced and water can be saved.

  Next, a final dehydration step is performed. The operation / action is the same as the dehydration step before rinsing, and a substantially circular convex portion 5 is provided on the peripheral wall portion 4a of the washing and dewatering tub 4 so as to protrude inward and to form a substantially circular phase line with the peripheral wall portion 4a. Therefore, it is possible to reduce the amount of water contained in the clothing after the dehydration.

  This is the end of the course of the washing course, and if it is then dried in the sun, the amount of moisture remaining in the clothes is low, so it dries quickly.

  Next, the case where a drying process is performed is demonstrated.

  The air blown from the blowing means 14 provided on the upper part of the main body 1 is heated by the heating means 15 in the circulation duct 16 to become hot air at a predetermined temperature and is blown into the outer tub 2 from the supply port 17. The The bottom surface of the washing and dewatering tub 4 is provided with a vent hole 20 having a plurality of openings on the circumference, and warm air blown from the supply port 17 into the outer tub 2 is washed from the vent hole 20. It is fed into the cum dewatering tank 4. The clothes 10 are agitated by rotating the washing and dewatering tub 4 forward and backward by the driving means 6. The warm air blown from the bottom surface side of the washing and dewatering tub 4 touches the agitated clothing 10 and removes its moisture, so that the drying of the clothing 10 is promoted, and the air containing moisture is fed from the exhaust port 18 to the dehumidifying duct 19. Exhausted inside. Into the dehumidifying duct 19, water is injected from the water injection nozzle 21 by opening a water injection valve (not shown), the air is cooled by water, and the water vapor contained in the air is condensed to dehumidify. The water that has cooled the air and the water generated by condensation flow down in the outer tub 2 and are discharged to the outside through the drain port 22. The cooled air is blown again by the blowing means 14 and blown into the outer tub 2 heated by the heating means 15. The garment 10 is dried by repeating this air circulation with dehumidification and heating.

  At this time, if the amount of water contained in the garment 10 at the start of drying is small, the drying time is short, and therefore, the amount of power consumption can be reduced. Immediately after the completion of dehydration, the garment 10 is attached to the wall surface of the washing and dehydrating tank 4. The drying time is further shortened by applying warm air while the clothes 10 are peeled off from the wall surface and efficiently stirred from this stuck state. In the convex part 5 on the wall surface of the washing and dewatering tub 4, since the garment 10 is pushed up around the convex part 5 and the garment 10 is easily peeled off, the garment 10 can be efficiently stirred from the early stage of the drying process. The drying time can be shortened.

  As described above, in the present embodiment, the entire peripheral wall portion is provided by providing the convex portion 5 that protrudes inwardly in the peripheral wall portion 4a of the washing and dewatering tub 4 and that has a substantially circular intermeshing line with the peripheral wall portion. Without draining a large number of dewatering holes, water drained from the clothes by the centrifugal force during dehydration is smoothly drained out of the washing and dehydrating tank 4, and the clothes 10 after dehydration is finished Since it can be easily peeled off, it can improve rinsing performance and dewatering performance, shorten drying time, save energy, and reduce the number of dewatering holes provided in the peripheral wall, so it can be used as both a washing and dewatering tank. The strength of can be improved.

  In the configuration of the present embodiment, the same effect can be obtained for a vertical washing machine in which the rotation axis of the washing and dewatering tub 4 is substantially vertical.

  Further, as shown in FIG. 3, the convex portion 5 is formed in a conical shape 5 a so that the water is vigorously drained from the tip portion of the convex portion by the centrifugal force applied to the water contained in the garment 10. Since it is led to the hole 3, the water separated from the clothing 10 by the centrifugal force at the time of dehydration can be smoothly discharged out of the washing / dehydration tank 4, and the amount of water remaining in the clothing 10 can be reduced. By being pushed up to 5, it becomes easy to peel off from the wall surface part 4a of the washing and dewatering tub 4, so that the rinsing performance and the dewatering performance can be improved, the drying time can be shortened and the energy can be saved.

  Also, as shown in FIG. 4, by forming the cross-sectional shape of the convex portion 5 into a dome shape 5 b, the garment 10 is in a state in which the garment 10 is stirred and lifted and dropped during washing and rinsing. Can be prevented from being rubbed and damaged by the tip of the convex portion 5, and water separated from the garment 10 by centrifugal force during dehydration can be smoothly washed along the dome shape 5b of the convex portion 5. It is possible to reduce the amount of water remaining in the garment 10 after being discharged to the outside of the dehydration tank 4, and the garment 10 is pushed up to the convex part 5 so that it is easily peeled off from the wall surface part 4 a of the washing and dehydration tank 4. Performance can be improved, drying time can be shortened, and energy can be saved.

  Moreover, as shown in FIG. 5, the 1st convex part 5c which is the adjacent convex part 5, the 2nd convex part 5d, and the 3rd convex part 5e were provided in the circumference | surroundings of the 1st convex part 5c. The drain holes 3a and 3b positioned between the drain holes 3 and the second protrusions 5d, and the first protrusions 5c of the drain holes 3 provided around the second protrusions 5d The drain holes 3a and 3b located between the same are the same drain holes 3a and 3b, and among the drain holes 3 provided around the second protrusion 5d, Are the drain holes 3c, 3d positioned between the second convex portion 5d and the drain holes 3c, 3d positioned around the third convex portion 5e. Since the water drain holes 3c and 3d are the same, the water drain holes 3 between the adjacent convex portions 5 may be one or one row, so that the mold is compared with the case where the plurality of rows are provided. Simplified configuration In addition, the strength between the adjacent convex portions can be improved, and the water pushed out by the centrifugal force of rotation by the adjacent convex portions is surely discharged from the drain hole between the adjacent convex portions. Therefore, it is possible to improve the rinsing performance and dewatering performance, shorten the drying time, and save energy.

  Further, the convex portion 5 has a plurality of rows Ya of a plurality of convex portions 5 arranged in a substantially straight line inclined at a predetermined angle (for example, 15 degrees) with respect to the rotation center direction Y of the washing / dehydrating tub 4. It is arranged. Further, a plurality of rows Xa of convex portions 5 arranged in a substantially straight line in a substantially right angle direction are arranged with respect to the row Ya of the convex portions 5 arranged in a plurality of substantially linear shapes inclined at a predetermined angle. That is, the plurality of convex portions 5 arranged in a substantially straight line inclined at a predetermined angle (for example, 15 degrees) with respect to the direction X perpendicular to the rotation center direction Y of the washing / dehydrating tub 4. A plurality of rows Xa are arranged. With this configuration, the drain holes 3 can be arranged in a simple configuration with the drain holes 3 around the convex portion 5 being shifted from each other with respect to the rotational center direction Y of the washing and dewatering tub 4. By arranging the drain holes 3 around the convex portion 5 so as to be shifted from each other, the water discharged from the drain holes 3 is placed on the inner wall of the outer tub 2 on the washing and dehydrating tub 4. Therefore, the portion of the outer tub 2 that does not contact the inner wall of the outer tub 2 can be reduced as much as possible, and the area for cleaning the inner wall of the outer tub 2 with dewatered water can be increased. The area where dirt adheres to the inner wall of 2 can be reduced, and the occurrence of mold on the inner wall of the outer tub 2 can be suppressed as much as possible. Furthermore, since the convex portions are arranged to be shifted in the front-rear direction in adjacent rows with respect to the rotation center direction Y, when cut along a plane in the direction X perpendicular to the rotation center direction Y, Since the convex portion 5 always exists, the convex portion 5 can improve the strength against the moment in the rotation center direction Y of the washing / dehydrating tub 4.

  Further, the convex portion 5 is formed such that the height on the bottom side, which is the back side, is increased and the bottom side clothing, which is easy to collect clothes, is formed by making the height on the input side 11 side of the washing / dehydrating tub 4 low. By dehydrating more efficiently than clothing on the 11th side, uniform dewatering performance can be realized from the inlet 11 side to the bottom side of the washing and dewatering tub 4, reducing dehydration unevenness, shortening the drying time and saving energy. Can do.

  As described above, according to the present invention, by providing the substantially circular convex portion projecting inwardly on the peripheral wall portion of the washing and dewatering tub, the water discharged from the clothing due to centrifugal force during dehydration can be washed smoothly. The clothes are drained outside the dehydration tub, and the clothes after dehydration are easily peeled off from the wall surface of the washing / dehydration tub, thereby improving rinsing performance and dehydration performance, shortening the drying time, and saving energy.

Sectional drawing of the drum type washing machine in Embodiment 1 of this invention Cross section of the drum type washing machine Cross section of the main part of the drum type washing machine Cross section of the main part of the drum type washing machine Main part plan view of the drum type washing machine Sectional view of a conventional drum-type washing machine Cross section of the drum type washing machine

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Outer tank 3 Drain hole 4 Washing and dehydration tank 4a Perimeter wall part 5 Convex part 6 Motor (drive means)

Claims (6)

A main body, an outer tub supported in the main body, a washing / dehydrating tub rotatably provided in the outer tub and having a plurality of drain holes in a peripheral wall portion, and the laundry / dehydrating tub being driven to rotate The washing and dewatering tub has a plurality of convex portions projecting inwardly on the peripheral wall portion and having a substantially circular shape with the peripheral wall portion, and water is drained around the convex portion. A washing machine in which a plurality of holes are arranged substantially equally in the circumferential direction around the convex portion. The washing machine according to claim 1, wherein the convex part has a conical cross section. The washing machine according to claim 1, wherein the convex portion has a dome-shaped cross section. Water drainage having a first convex portion and a second convex portion, which are adjacent convex portions, and located between the second convex portions in a drain hole provided around the first convex portion. The water drain hole located between said 1st convex part among the water drain holes provided in the circumference | surroundings of said hole and said 2nd convex part was made into the same drain hole. The washing machine according to Item 1. The protrusions are arranged in a plurality of rows of the protrusions arranged in a substantially straight line inclined at a predetermined angle with respect to the rotation center direction of the washing and dewatering tub, and are inclined at the predetermined angle. The laundry according to any one of claims 1 to 4, wherein a plurality of rows of the convex portions arranged substantially linearly in a substantially right angle direction are arranged with respect to the substantially linear shape. Machine. The washing machine according to any one of claims 1 to 5, wherein the convex portion is formed such that the height on the opening side for putting clothes is low and the height on the bottom side is high.