JP2012157410A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine in which a washing liquid is poured uniformly over whole landry without increasing the number of circulation water channels and the washing liquid is prevented from spattering.SOLUTION: A washing machine comprises: an outer tub; a washing/dewatering tub rotatably provided in the outer tub; a stirring blade rotatably provided on an inside bottom of the washing/dewatering tub; a rear blade provided below the stirring blade; driving means for rotatively driving the stirring blade and the washing/dewatering tub; water supply means for supplying water to the outer tub; and control means for controlling the driving means and the water supply means. Washing liquid is increased by rotating of the rear blade, through a circulation water channel formed by circulation water channel members attached to the washing/dewatering tub, so as to flow into the washing/dewatering tub through openings disposed in opposing positions in upper portions of the circulation water channel members. Portions of washing liquid flowing from the openings are poured in a displaced manner in circumferential direction so that they do not overlap each other when seen from a vertical direction.

Description

  The present invention relates to a fully automatic washing machine used in a general household and a washing / drying machine provided with a drying function, and in particular, when washing and rinsing, washing water is pumped by the rotation of a stirring blade and the washing / dehydrating tub is used. The present invention relates to a washing machine that carries out washing by guiding water from the lower part to the upper part and discharging the washing water guided to the upper part.

  In recent years, resource saving by water-saving and detergent-saving has been strongly demanded as a demand for customers of fully automatic washing machines, and realizing it has become a very important issue.

  In order to achieve this problem, various methods have been proposed in the past to make water-saving and water-saving detergents by pouring a washing liquid on top of the laundry.

  For example, as disclosed in Japanese Patent Laid-Open No. 7-8680 (Patent Document 1), a stirring blade provided on the bottom surface of a washing and dewatering tub is rotatably disposed, and a back blade provided on the back surface of the stirring blade. The upper part of the plurality of circulation channels independently formed up to the upper part of the washing and dewatering tank is opened toward the inside of the washing and dewatering tank, and a shower nozzle is provided in the opening. It is set as the structure where the front-end | tip of the washing | cleaning liquid discharged intersects in the washing | cleaning and dehydration tank substantially in the center.

Japanese Patent Laid-Open No. 7-8680

  In the conventional fully automatic washing machine, since the washing liquid is discharged from the plurality of discharge ports to the center, the strength of the washing water intersecting at the center is generated depending on the capacity and the quality of the laundry. Could jump up and down. In order to prevent such splashing of the washing liquid, it is necessary to take measures such as providing an inner lid.

  In addition, in order to evenly pour the washing liquid into the laundry, a large number of circulation channels have to be provided, which has been a factor in increasing production costs.

  An object of the present invention is to provide a washing machine in which the washing liquid is poured evenly over the entire laundry without increasing the circulation channel and the splashing of the washing liquid is prevented.

  In order to achieve the above object, the present invention is provided in an outer tub, a washing and dewatering tub that is rotatably installed in the outer tub, and is rotatably installed in an inner bottom of the washing and dehydrating tub. A stirring blade, a back blade provided at a lower portion of the stirring blade, a driving unit that rotationally drives the stirring blade and the washing and dewatering tub, a water supply unit that supplies water into the outer tub, the driving unit, and the It has a control means for controlling the water supply means, and by rotating the back blade, the washing liquid is raised through a circulation water channel formed by a circulation channel member attached to the washing and dewatering tub, and facing each other In the washing machine in which the washing liquid flows into the washing and dewatering tub from the respective openings provided in the upper part of the circulation flow path member at the position where the washing liquid flows in from the opening, Shift in the circumferential direction so that they do not overlap each other when viewed from the vertical direction Sprayed Te.

  The washing liquid discharged from the plurality of openings in the upper part of the circulation channel can be prevented from interfering with each other inside the washing and dewatering tub, and the washing liquid is evenly poured into the laundry during the washing. It is. In addition, since the washing liquid does not interfere, the amount of circulating water can be increased, and as a result, the cleaning power can be improved. Furthermore, even if the water level is reduced, the washing liquid can be efficiently sprayed on the clothes to prevent washing unevenness, leading to water saving.

It is a figure which shows the internal structure of the fully automatic washing machine of the Example of this invention. It is a figure which shows the main cross section of the washing and dewatering tank and the stirring blade which concern on the Example of this invention. It is the top view which showed the state of the washing | cleaning liquid discharged in the washing and dehydration tank which concerns on the Example of this invention. It is a figure which shows the circulation flow path member in the fully automatic washing machine of the Example of this invention.

  Hereinafter, examples according to embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram showing an internal configuration of a fully automatic washing machine 1 according to the embodiment of the present invention.

  A washing machine, in particular a fully automatic washing machine, is made of a synthetic resin in which a washing and dewatering tub 3 is rotatably placed in an outer frame 5 made of steel by a suspension rod 8 and a vibration isolator 4 made of a coil spring or elastic rubber. The outer tub 6 is suspended.

  A synthetic resin upper surface cover 9 having a control unit 7 as control means and an electromagnetic water supply valve 8 as water supply means is provided at the upper part of the outer frame 5, and a synthetic resin base is provided at the lower part of the outer frame 5. The member 10 is included.

  Hereinafter, the detail of each member mentioned above is demonstrated.

  As shown in FIG. 1, the fully automatic washing machine 1 has an outer frame 5 made of a substantially box-shaped steel plate containing an internal mechanism, and a base member 10 made of synthetic resin at the lower part of the outer frame 5. Four leg portions 10a are fitted and inserted into the four corners, and the main body of the fully automatic washing machine 1 is supported in direct contact with the floor surface. At the rear part of the base member 10, a hose outlet 11 a for drawing out the drain hose 11 is provided.

  A top cover 9 made of a synthetic resin is attached to the upper part of the outer frame 5, and a laundry input port 9 a for taking in and out the laundry 12 is provided at the center of the top cover 9. A lid 9b for opening and closing the insertion port 9a is provided.

  The electrical components included in the upper surface cover 9 are provided at two locations on the front side and the rear side of the upper surface cover 9, and a front protective cover 9c is mounted on the front rear surface, and a rear protective cover 9d is mounted on the rear rear surface. . In a space formed by the upper surface cover 9 and the front protective cover 9c, a power switch 13, an input switch unit 14 for operating each process such as washing, a progress display unit 14a for displaying the progress of each process, etc. Is housed.

  In a space portion formed by the upper surface cover 9 and the rear protective cover 9d, there are a control unit 7 as a control means, a pressure-sensitive water level sensor 15 for detecting the water level, and an electromagnetic water supply valve 16 for supplying washing water to the outer tub 6. Etc. are stored.

  The control unit 7 may be arranged either in the space constituted by the front protective cover 9c or in the space constituted by the rear protective cover 9d.

  Further, a water supply hose 17 connected to a water tap is provided outside the rear portion of the top cover 9, and the other end is connected to an electromagnetic water supply valve 16.

  The front protective cover 9c and the rear protective cover 9d provided on the back surface are attached from the surface of the top cover 9, and are provided on the member to which the power switch 13 and the input switch part 14 are attached from the front surface. The structure may be sufficient.

  The upper surface cover 9 is fixed to the outer frame 5 from above or from the side with screws 9e via the front protective cover 9c and the rear protective cover 9d on the upper part of the outer frame 5 so as to cover the upper opening of the outer frame 5. ing.

  The outer frame 5 has a bottomed substantially cylindrical outer tub 6 for storing washing water. The outer tub 6 is made up of a suspension bar 8 suspended from the upper end of the outer frame 5 and a coil spring or elastic rubber. The vibration isolator 4 is supported by the vibration isolator 4. The outer tub 6 is formed of a synthetic resin, and an air trap 6a for detecting a water level is formed on the lower wall surface.

  The water level of the washing water in the outer tub 6 is detected from the air trap 6a through the air tube 6b by a pressure-sensitive water level sensor 15 which is a water level detecting means. When performing the washing process or the like, the electromagnetic water supply valve 16 is opened by the command of the control unit 7, and the washing water is supplied into the outer tub 6. When the water level reaches a predetermined level, the water level sensor 15 detects the water level, and the electromagnetic water supply valve 16 is closed according to a command from the control unit 7 to stop water supply.

  A drain valve 17 as a drainage device and a drain hose 11 are provided outside the bottom of the outer tub 6, and the outer tank drain port 6 c and the drain valve 17, and the drain valve 17 and the drain hose 11 are fitted in the bottom of the outer tub 6. Has been.

  When performing the dehydration process or the like, the drain valve 17 is opened by a command from the control unit 7, and the washing water in the outer tub 6 is drained from the other end of the drain hose 11 to the outside of the fully automatic washing machine 1. The drainage hose 11 has a bellows on its surface and is integrally molded with a synthetic resin.

  In addition, there is a gap between the inner periphery of the outer tub 6 and the outer periphery of the washing / dehydrating tub 3, and in order to prevent the laundry from entering the gap and to maintain the rigidity of the entire outer tub 6, Includes a tank cover 20 that covers the upper surface of the fluid balancer 19 provided in the washing and dewatering tank 3.

  A driving motor 22 and a speed reduction mechanism 24 for reducing the rotational speed of the driving motor 22 are attached to the outside of the bottom of the outer tub 6 via a steel plate mounting base 21.

  An induction motor or a synchronous motor is used for the drive motor 22.

  Even if the drive mechanism drives the stirring blade 2 via the V-belt (not shown) and the speed reduction mechanism 24 by the drive motor 22, the drive shaft of the drive motor 22 is on the same axis as the speed reduction mechanism 24. It may be configured as follows.

  An electric operation clutch mechanism 24a and a planetary gear reduction mechanism 24b for switching between a washing operation and a dewatering operation are provided inside the reduction mechanism 24 that reduces the rotational speed. The electric operation clutch mechanism 24a rotates the stirring blade 2 left and right with the washing / dehydrating tub 3 stationary (stirring mode), or rotates the washing / dehydrating tub 3 and the stirring blade 2 integrally in the same direction. (Dehydration mode) can be selected.

  The vibration isolator 4 made of a coil spring or elastic rubber is composed of a suspension rod 8, a suspension rod holder 8a, a sliding cylinder 4c, a vibration isolation spring 4d, a spring receiver 4e, and the like. A suspension rod holder 8 a having a convex spherical surface is fixed to the upper end of the suspension rod 8, and the suspension rod holder 8 a is fitted to the concave spherical surface of a corner plate 5 a provided at the upper four corners of the outer frame 5. . The sliding cylinder 4c has a convex spherical surface so as to be fitted to the concave spherical surface of the sliding cylinder receiver 6d provided in the outer tub 6, and an anti-vibration spring 4d and a spring receiver 4e are provided inside. The vibration of the is suppressed.

  The synthetic resin base member 10 at the lower part of the outer frame 5 is fixed with the outer frame 5 using screws, prevents exposure of the lower end of the steel plate of the outer frame 5 and improves corrosion resistance. By improving the rigidity of the frame 5 as a whole, the full automatic washing machine 1 is protected from an external failure.

  Hereinafter, the washing and dewatering tank 3 according to the present invention will be described with reference to FIG.

  The washing and dewatering tub 3 is formed of a stainless steel plate and has a plurality of dewatering holes 3b for separating and discharging the washing water contained in the laundry 12 from the laundry 12 by centrifugal force on the peripheral wall. A fluid balancer 19 that suppresses vibration of the outer tub 6 due to the bias of the laundry 12 is provided at the upper edge of the trunk portion 3a. ing. Further, a bottom plate 25 having a cross-sectional shape curved upward is fixed to the lower end portion of the body portion 3a and formed into a bottomed cylindrical shape that is long in the axial direction. On the bottom surface of the bottom plate 25, a plurality of water inlets 25a communicating with the outer tub 6 are provided.

  A rotatable stirring blade 2 is provided on the inner peripheral side of the bottom plate 25 at the bottom of the washing and dewatering tub 3. The stirring blade 2 has a large diameter that covers most of the bottom plate 25, is curved upward so that the peripheral edge is pushed up, is formed in a dish shape, and rotates in a state of supporting the laundry 12. It is the composition which does. In addition, on the back surface of the stirring blade 2, back blades 2a are integrally provided radially. Further, the stirring blade 2 has a large number of holes 2b communicating with the front surface and the back surface in curved portions.

  The stirring blade 2 is decelerated by the planetary gear speed reduction mechanism 24b provided in the speed reduction mechanism 24, and the rotation speed of the stirring blade 2 is rotated at 90 to 120 rotations per minute. This agitating blade 2 repeats normal rotation / reverse rotation according to a command from the control unit 7 and performs washing, rinsing, and the like by stirring the laundry 12 in the washing and dewatering tub 3 in a vertical motion.

  Two or more synthetic resin circulation flow path members 26 integrally provided with a water conduit 26 a on the back surface are attached to the inner peripheral surface of the washing and dewatering tank 3. Each circulating water channel 26b is formed.

  Of the circulation flow path members provided at two or more places, the first circulation flow path member 26 and the second circulation flow path member 27, which are used for spraying the washing liquid from the upper part of the laundry 12, have a washing and washing function. They are provided at positions facing each other around the rotation axis of the dewatering tank 3. The first circulation flow path member 26 and the second circulation flow path member 27 are provided with an opening 26 c at substantially the same height at the upper part thereof, and the washing liquid can be passed from the upper part of the laundry 12. Used for spraying.

  The circulation channel member other than the circulation channel used for spraying the washing liquid from the upper part of the laundry 12 is formed with a lint filter mounting portion for capturing lint, waste, etc. in the washing tub. 28 is attached and has a detergent inlet 29 at the top.

  In addition, a circulation water passage 26 b is provided in communication with a pump chamber 25 b formed by the inner peripheral side of the bottom plate 25 and the outer peripheral side of the back blade 2 a provided on the back surface of the stirring blade 2. Then, the washing liquid is pushed outward by the centrifugal force generated by the rotation of the back blade 2a provided on the back side of the stirring blade 2, so that the washing liquid rises through the circulation water channel 26b, and the opening provided in the circulation water channel The washing liquid is poured intermittently from the portion 26c or the lint filter 28.

  Next, the details of the first circulation flow path member 26 and the second circulation flow path member 27 used for flowing the washing liquid into the washing and dewatering tub 3 will be described.

  The operation of the above configuration will be described with reference to FIGS. First, as shown in the figure, the laundry 12 is put into the washing and dewatering tub 3, the power switch 13 is turned on, and a start switch (not shown) provided in the input switch unit 14 is turned on. According to the command, the electromagnetic water supply valve 16 is controlled to supply water to a predetermined water level, and the washing process is started. When entering the washing process, the driving motor 22 is rotated by being controlled by the control unit 7 in the right rotation / pause / left rotation / pause according to the washing water flow. The controlled rotation of the drive motor 22 is transmitted to the stirring blade 2 via the speed reduction mechanism 24. Accordingly, the stirring blade 2 and the back blade 2a of the stirring blade 2 rotate according to the rotation of the driving motor 22, the laundry 12 and the washing liquid in the washing and dewatering tub 3 are stirred, and the laundry 12 is washed. The

  On the other hand, the washing liquid between the back blade 2a of the stirring blade 2 and the circulation channel member 27 is pushed outward by centrifugal force by the rotation of the back blade 2a according to the rotation of the stirring blade 2, and passes through the circulation water channel 26b. Thus, the water is poured intermittently into the washing and dewatering tank 3 from the opening 26c provided in the circulation water channel 26b or the lint filter 28. In addition, after the washing liquid pushed out to the circulating water channel 26b by the back blade 2a of the stirring blade 2, a new water inlet 25a leading to the outer tub 6 provided in the bottom plate 25 below the back blade 2a of the stirring blade 2 is used. Washing fluid is supplied. That is, the washing liquid between the outer tub 6 and the washing / dehydrating tub 3 is supplied, and the liquid level between the outer tub 6 and the washing / dehydrating tub 3 is discharged from the circulation channel member. At the moment of washing, the washing liquid level in the washing and dewatering tank 3 is temporarily lowered. However, since the washing liquid flows into the outer tub 6 from the hole 3b for dehydration of the washing / dehydrating tub 3 and the gap between the washing / dehydrating tub 3 and the stirring blade 2, the difference in liquid level is balanced at a certain value, It becomes constant.

  In this way, the washing liquid is discharged from the washing and dewatering tub 3 through the back blade 2 a of the stirring blade 2 and the circulation water channel 26 b and from the opening 26 c provided in the circulation water channel or the lint filter 28, and is washed and removed through the laundry 12. It circulates along the path reaching the water tank 3 to help the detergent dissolve, and at the same time the detergent liquid can be sufficiently permeated into the laundry 12, so that the cleaning effect can be greatly enhanced.

  Further, as shown in FIG. 3, the shower liquid 30 discharged from the opening 26c provided in the circulation channel has a substantially semicircular shape so as to be wider than the width of the opening 26c provided in the circulation channel at the landing point. It is being discharged. Further, the shower liquids 30 are sprinkled by shifting in the circumferential direction so that the shower liquids 30 do not overlap each other when viewed from the vertical direction. Hereinafter, the method for spraying the washing liquid will be specifically described.

  First, the circumferential center position of the first opening provided in the upper part of the first circulation channel member 26 is shifted from the circumferential center position of the first circulation channel member 26. Similarly, the circumferential center position of the second opening provided in the upper part of the second circulation channel member 27 is shifted from the circumferential center position of the second circulation channel member 27. And in the 1st opening part, the edge part 31a near the circumferential direction center of the 1st circulation channel member 26, and the circumferential direction center of the 2nd circulation channel member 27 among the 2nd openings When divided into two regions divided by a cross section including a straight line 32 connecting the end 32b on the near side, the washing liquid is sprayed from the first opening to one region and the other region is sprayed. On the other hand, the washing liquid was sprayed from the second opening. For this reason, even if the washing | cleaning liquid 30 spread | dispersed from a 1st opening part and the washing | cleaning liquid 30 spread | dispersed from a 2nd opening part are made to land substantially simultaneously, it is spread | dispersed from a mutual opening part. It is possible to prevent the washing liquid from colliding and jumping up. Moreover, since it can suppress that the washing liquid discharged from an opening part mutually interferes, adjustment of a circulating water quantity becomes easy.

  Here, at the time of washing, the laundry 12 is rotated in the circumferential direction of the washing and dewatering tub 3 by the stirring blade 2, so that the washing liquid is poured evenly onto the laundry 12. Therefore, even if the laundry 12 is above the water level in the washing and dewatering tub 3, washing with less washing unevenness is possible. That is, it becomes possible to supply water-saving and detergent-saving washing machines.

  In addition, a rib for adjusting the circulation flow rate of the washing liquid is provided in the water conduit 26a of the circulation flow path member so that the washing liquid 30 discharged from the opening has substantially the same shape regardless of whether the stirring blade 2 is rotated forward or reverse. May be. Further, the water conduit 26a forming the circulation channel is provided with an obtuse angle from the middle thereof, and the obtuse angle in one circulation channel and the obtuse angle in the other circulation channel are opposite to each other with respect to the front-rear direction of the washing machine. . The two circulation channel members 26 and 27 arranged at positions facing each other are more productive when a common shape member is used, but the two circulation channel members have different shapes. May be used.

  Furthermore, a structure in which the lint filter attachment portion is formed in the water conduit 26 a portion below the opening 26 c of the circulation flow path member 26 and the lint filter 29 is attached may be employed.

DESCRIPTION OF SYMBOLS 1 Fully automatic washing machine 2 Agitation blade 3 Washing / dehydration tank 5 Outer frame 12 Laundry 26 1st circulation channel member 26b Circulation water channel 27 2nd circulation channel member

Claims (4)

An outer tank,
A washing and dewatering tub rotatably placed in the outer tub;
A stirring blade rotatably installed in the inner bottom of the washing and dewatering tank;
A back blade provided at a lower portion of the stirring blade,
Drive means for rotationally driving the stirring blade and the washing and dewatering tank;
Water supply means for supplying water into the outer tub;
Control means for controlling the drive means and the water supply means;
By rotating the back blade, the washing liquid is raised via the circulation channel formed by the circulation channel member attached to the washing and dewatering tub, and the upper part of the circulation channel member at a position facing each other. In the washing machine in which the washing liquid flows into the washing and dewatering tub from each opening provided in
The washing liquid flowing in from the opening is sprayed while being shifted in the circumferential direction so as not to overlap each other when viewed from the vertical direction. In claim 1,
The washing machine according to claim 1, wherein a circumferential center position of the opening is shifted with respect to a circumferential center position of the circulation channel member. In claim 2,
The first circulation channel member and the second circulation channel member are provided at positions facing each other around the rotation axis of the washing and dewatering tub,
Of the first opening provided in the upper part of the first circulation channel member, the end of the first circulation channel member close to the center in the circumferential direction and the second circulation channel member When divided into two regions separated by a cross section including a straight line connecting the end portion on the side close to the center in the circumferential direction of the second circulation flow path member in the second opening provided in the upper part of In addition, the washing liquid is sprayed from the first opening to one area, and the washing liquid is sprayed from the second opening to the other area. . In claim 3,
The washing machine sprayed from the first opening and the washing liquid sprayed from the second opening are landed substantially simultaneously.