JP2010207450A - Drum-type washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drum-type washing machine excellent in an effect changing a location of a wash in the front of a drum to the back and capable of making vibrations of the drum and a water tub sufficiently less. <P>SOLUTION: A front side 13a of a baffle 13 provided on an inner peripheral part of the drum 11 has a larger angle to a rotation center O of the drum 11 than that of a rear side 13b (θa>θb). Thereby, the wash W located in the front of the drum 11 can be securely shifted to the back. As a result, an unbalanced load of a counter-motor side of the drum 11, of which the back is connected with a motor as if it is a cantilever one in the back, can be sufficiently small, thereby making the vibrations of the drum 11 and the water tub, which houses the drum 11 and of which the front opening is flexibly connected to a wash introducing/removing opening of an exterior box with bellows, sufficiently small. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a drum type washing machine having an improved baffle.

  Conventionally, in a drum type washing machine, a water tank is elastically supported in an axially front-rear direction inside an outer box having a laundry entrance on the front surface. The laundry doorway of the box is connected with a bellows. In addition, a motor is attached to the rear part of the water tank, the drum is disposed inside the water tank so that the axial direction is front and rear, the rear part is connected to the motor, and the drum is driven by the motor. It is like that. The drum is provided with a plurality of baffles for lifting the laundry in the axial direction on the inner periphery of the drum. With this configuration, the laundry is washed and dewatered. Yes.

  Specifically, washing (washing and rinsing) of the laundry is performed by supplying a predetermined amount of water from the water tank to the inside of the drum, and then rotating the drum alternately in both forward and reverse directions at low speed by a motor. The dehydration is performed by draining water from the drum and the water tank, and then rotating the drum at a high speed in one direction (forward direction).

  When the laundry is washed and dewatered in this way, the laundry contained in the drum moves only in the direction of rotation of the drum during washing and is displaced from the bottom to the top and from the top to the bottom by the baffle. At the time of dehydration, the drum is displaced in the same manner as during washing until the drum rotates at a high speed, and then sticks to the inner peripheral surface of the drum after the high speed.

  Thus, during dehydration, if there is a deviation (unbalance) in the laundry distribution inside the drum, the drum vibrates and the water tank vibrates with it. In particular, when heavy laundry such as bath towels or G pans are located at the front part of the drum so as to be offset from a part of the drum in the circumferential direction, the rear part of the drum is connected to the motor so that the rear part of the drum is cantilevered. The unbalanced load on the motor side increases and the moment increases, and the vibration of the drum and water tank is caused by the fact that the water tank is softly connected to the laundry entrance / exit of the outer box by the bellows. It grows, and in the worst case, the water tank collides with the outer box. In this case, generally, vibrations of the drum and the water tank are detected, and when the large vibrations are detected, the operation is temporarily interrupted, water is supplied, and further, the drum is rotated at a low speed, and a correction process for correcting the unbalance is performed. Since the operation is performed, the operation time is extended, and the operation is stopped due to the vibration of the drum and the water tank that is still generated.

  On the other hand, there exists what provided the said baffle in the shape of an inclination with respect to the rotation center of a drum (for example, refer patent document 1).

Japanese Utility Model Publication No. 8-1748

In the case where the baffle is inclined with respect to the rotation center of the drum as described above, the laundry positioned at the front part of the drum is moved to the rear side by rotating the drum in the inclination direction of the front side of the baffle during dehydration. It can be displaced.
However, the baffles of the above-mentioned ones are linearly inclined and have a poor effect of displacing the laundry located at the front part of the drum to the rear side, so that the vibrations of the drum and the water tank can be sufficiently reduced. It was impossible.

  The present invention has been made in view of the above-described circumstances, and therefore, the object thereof is excellent in the effect of displacing the laundry positioned at the front of the drum to the rear side, and sufficiently reduces the vibration of the drum and the water tank. To provide a drum-type washing machine that can be used.

In order to achieve the above object, the drum type washing machine of the present invention is provided with an outer box having a laundry doorway on the front surface and elastically supported in a state where the axial direction is front and rear inside the outer box. A water tank having a front surface opened, a bellows connecting the front opening of the water tank and a laundry doorway of the outer box, a driving device attached to the rear of the water tank, and an axial direction in the water tank. A drum which is disposed in a state where the rear portion is connected to the driving device and is driven by the driving device;
The drum has a baffle extending in the axial direction on the inner periphery of the drum, and performs washing and dehydration of the laundry.In the front side of the baffle, the angle from the rear side to the rotation center of the drum is set. The invention is characterized in that it is enlarged (invention of claim 1).

  According to the above means, the front side of the baffle is provided with a larger angle with respect to the rotation center of the drum than the rear side, so that the laundry positioned at the front part of the drum can be excellently displaced rearward. . Therefore, it is possible to sufficiently reduce the vibration of the drum and the water tank.

  Also, in this case, the rear side of the baffle has a smaller angle with respect to the center of rotation of the drum than the front side, so that the laundry located at the front part of the drum is entangled by twisting of the laundry that occurs as the laundry is displaced rearward. This can be reduced on the rear side, and the occurrence of an unbalance load due to the entanglement can be reduced to further reduce the vibration of the drum and the water tank.

  In addition, in the loosening process, the washing process, and the rinsing process, the drum is alternately rotated in both forward and reverse directions at a low speed, so that the laundry that is displaced rearward by the baffle by the rotation in each forward direction, In each reverse rotation, it is displaced to the front side by the baffle and, in short, is displaced back and forth so as to be mixed. Therefore, in the unwinding process, the unwinding effect is excellent and the unbalance is reduced. Further, the washing process and the rinsing process are effective in improving the cleaning performance.

FIG. 3 is a developed plan view of the main part showing the first embodiment of the present invention. Broken perspective view of the entire drum type washing machine Longitudinal side view of the entire drum type washing machine Flow chart showing control details of operation Front view showing the action of the main part FIG. 1 equivalent view showing a second embodiment of the present invention. FIG. 1 equivalent view showing a third embodiment of the present invention. Sectional drawing which follows the VIII-VIII line of FIG. Sectional view along line IX-IX in FIG. FIG. 1 equivalent view showing a fourth embodiment of the present invention. Sectional drawing which follows the XI-XI line of FIG. Sectional view along line XII-XII in FIG. FIG. 4 equivalent view showing the fifth embodiment of the present invention. Time chart showing the length of drum rotation time during the loosening process FIG. 4 equivalent view showing the sixth embodiment of the present invention Time chart showing the length of drum rotation time in the washing and rinsing strokes

Hereinafter, a first embodiment (first embodiment) of the present invention will be described with reference to FIGS.
First, FIG. 2 and FIG. 3 show the entire structure of the drum type washing machine, and the outer box 1 is an outer shell. In detail, the outer box 1 includes a base 1a made of a synthetic resin and a box body 1b attached to and bonded to the base 1a, and a front portion (the left side in FIG. 3) of the box body 1b. A laundry doorway 2 is formed at the center of the basket, and a door 3 for opening and closing the doorway 2 is provided. An operation panel 4 is provided at the upper part of the front surface of the box body 1b, and a control device 5 is provided on the back side (inside the outer box 1).

A water tank 6 is disposed inside the outer box 1. This water tank 6 is elastically supported by a pair of left and right (only one shown) suspensions 7 in such a state that the axial direction is front and rear (left and right in FIG. 3), and in addition, the front tank is inclined upward.
A motor 8 is attached to the rear part of the water tank 6. In this case, the motor 8 is composed of, for example, a direct current brushless motor, and is an outer rotor type. The rotating shaft 8c is attached to the back portion of the water tank 6 and coupled to the center portion of the rotor 8b. The water tank 6 is inserted through a bearing 10 provided in the interior.

A drum 11 is disposed inside the water tank 6. The drum 11 is supported in a state in which the axial direction is front and rear and the front is inclined upward by being coaxial with the water tank 6 by connecting the center of the rear part to the tip of the rotating shaft 8c of the motor 8. is doing. As a result, the drum 11 is directly rotated by the motor 8. Therefore, the motor 8 functions as a driving device for rotating the drum 11.
A large number of small holes 12 (only a part of which is shown in FIG. 3) are formed in the peripheral side portion (body portion) of the drum 11 and a plurality of (for example, three) baffles 13 for picking up laundry are provided. ing. This baffle 13 will be described in detail later.

  Both the drum 11 and the water tank 6 are open at the front, and a liquid-sealed rotary balancer 16 is provided inside the periphery of the opening 14 of the drum 11, for example, and the opening 15 of the water tank 6 is formed in an annular shape. The laundry doorway 2 is connected by a bellows 17 made of an elastic material such as rubber. As a result, the laundry doorway 2 is connected to the inside of the drum 11 through the bellows 17, the opening 15 of the water tub 6, and the opening 14 of the drum 11.

  A drain outlet 18 is formed at the lowest part in the bottom of the water tank 6, in this case, the last part, and the base end of the in-machine drain hose 19 is connected to the drain outlet 18, and the distal end of the in-machine drain hose 19 is connected. Is connected to the in-machine drain hose connection port 21 of the filter case 20 disposed in the front portion of the base 1a of the outer box 1.

  The filter case 20 has the above-mentioned in-machine drain hose connection port 21 at the upper part, and a cap 22 is attached to the front end portion, and a lint filter (not shown) integrated with the cap 22 is accommodated inside. Yes. A drain valve 24 is connected to the lower side of the rear side of the filter case 20, and a drain pipe 25 is connected to the outlet of the drain valve 24. The distal end of the drainage pipe 25 faces the outside of the machine from the base 1a of the outer box 1 and is connected to an outside drainage hose (not shown).

  On the other hand, a circulation pump 26 is provided at the rear end of the filter case 20. This circulation pump 26 sucks the water in the water tank 6 through the filter case 20, the in-machine drain hose 19, and the drain port 18, and has a discharge port 27 on the peripheral side (upper part in the figure). The base end of the water supply hose 28 is connected to the discharge port 27. The water supply hose 28 has an intermediate part piped upward from the circumferential side of the bellows 17, and a tip part is connected to a fountain nozzle 29 provided at the upper part of the opening 15 of the water tank 6. 11 inside.

  As a result, the circulation pump 26 pressure-feeds the water in the water tank 6 sucked from the drain port 18 through the path of the in-machine drain hose 19-filter case 20 (lint filter) -circulation pump 26 through the water feed hose 28, and the fountain nozzle The shower water supply device 30 is configured to supply the drum 11 from 29 to the inside of the drum 11 in a shower shape.

  Further, an air trap 31 is connected to the upper portion of the front portion of the filter case 20, and an air tube is provided between the air trap 31 and the water level sensor 32 disposed at the top of the outer case 1. 33 is connected. Accordingly, the water level sensor 32 detects the water level in the water tank 6 via the in-machine drain hose 19, the filter case 20, the air trap 31, and the air tube 33, and functions as a water level detecting means. It has become.

  In addition, a water supply valve 34 and a water supply case 35 are disposed at the top of the outer box 1. Of these, the water supply valve 34 is connected to an external water supply hose (not shown) connected to a water tap (not shown) at the inlet, and the outlet is connected to the water supply case via the connection pipe 36. 35 is connected. The water supply case 35 has a detergent storage part (also not shown) inside, and the inside communicates with the water tank 6 via the in-machine water supply hose 37 from above. Accordingly, the water supply valve 34 communicates with the water tank 6 through the water supply case 35, and the water supply valve 34 and the water supply case 35 constitute a normal water supply device 38 for supplying water into the water tank 6.

Now, FIG. 1 shows the baffle 13 in detail as one representative, and as is clear from FIG. 1, the baffle 13 extends mainly in the axial direction on the inner peripheral portion of the drum 11. The front side 13a is provided with a larger angle with respect to the rotation center O of the drum 11 than the rear side 13b (θa> θb). The baffle 13 has a mountain range in which both side surface portions 13c and 13d rise toward the central ridge portion 13e, as will be apparent later in FIGS.
Further, according to the shape of the baffle 13, the small holes 12 are arranged in parallel with the baffle 13 so that the small holes 12 are not blocked by the baffle 13.

Next, the operation of the above configuration will be described.
FIG. 4 shows the operation control content of the control device 5, which is based on the user's operation on the operation panel 4. When the user performs an operation to start the operation, the control device 5 starts the operation. First, the laundry weight is detected (step S1). The weight of the laundry is detected by rotating the drum 11 to a predetermined rotational speed, the time required for the rotation, and then stopping the driving of the drum 11 by the motor 8 to rotate the drum 11 by inertia, thereby rotating the drum 11. The weight of the laundry is detected by the rotational load of the motor 8 from the time required for the speed to drop to a predetermined rotational speed.

  After this, the laundry weight is determined based on the result of the laundry weight detection, and the water level in the washing process and the rinsing process is determined accordingly, and then the water level determined for the washing process (the laundry is soaked). Tap water up to the water level) (step S3). The tap water is supplied by a normal water supply device 38. At this time, the detergent stored in the detergent storage part of the water supply case 35 is added together with the water supply.

Next, a washing process is executed (step S4). This washing process is performed by alternately rotating the drum 11 in both forward and reverse directions at a low speed of about 50 [rpm], whereby the laundry previously stored in the drum 11 is raised by the baffle 13. The tumbling is repeated and washed.
Thereafter, drainage is performed (step S5). This drainage is performed by opening the drainage valve 24 so that the water in the aquarium 6 (in the drum 11) is drained from the drainage port 18 of the aquarium 6 to the in-machine drainage hose 19-filter case 20 (lint filter) -drainage valve 24-drainage. Pipe 25-performed with the content discharged through the machine drain hose.

  Then, a loosening process before the dehydration process is executed (step S6). This loosening process is performed by rotating the drum 11 alternately in the forward and reverse directions at a low speed of about 50 [rpm] as in the washing process, for example, for two cycles, whereby the washing previously stored in the drum 11 is performed. The thing that the object is lifted by the baffle 13 and then dropped is repeated in both the forward and reverse directions of the rotation of the drum 11 to be loosened.

Thereafter, a dehydration process is executed (step S7). In this dehydration process, the drum 11 is moved to a maximum of about 1300 [rpm] in one direction (forward direction) in which the front side 13a of the baffle 13 is inclined as shown by an arrow A in FIG. ], The laundry in the drum 11 is subjected to centrifugal dehydration. At this time, an imbalance is also detected.
Next, tap water is supplied up to the water level determined for the rinsing process (step S8). The tap water is supplied in the same manner as in step S3. At this time, there is no detergent in the detergent storage part of the water supply case 35, and therefore only tap water is supplied into the water tank 6.

Thereafter, a rinsing process is executed (step S9). This rinsing process is performed in the same manner as the washing process.
Thereafter, the operations of drainage, loosening process, dewatering process, water supply, and rinsing process are performed in the same manner as in steps S5 to S9 (steps S10 to S14), and further, the drainage, loosening process, and dewatering process are performed in the same manner as in steps S10 to S12. Each operation is executed (steps S15 to S17), and the operation is terminated.

  1 and 5 show the state of the laundry in the dehydration process during the operation as described above, and the laundry W located at the front portion of the drum 11 is indicated by an arrow A of the drum 11. In this case, the front side 13a of the baffle 13 is displaced rearward at the front side 13a. At this time, the front side 13a of the baffle 13 is provided with a larger angle with respect to the rotation center O of the drum 11 than the rear side 13b. It is excellent in the effect of displacing the laundry W located at the front part of the drum 11 to the rear side. That is, the laundry W positioned at the front part of the drum 11 can be displaced more reliably on the rear side. Thus, the unbalance load on the side opposite to the motor 8 of the drum 11 which is connected to the motor 8 at the rear and is cantilevered at the rear can be sufficiently reduced, and the vibration of the drum 11 and the water tank 6 can be sufficiently reduced. .

  Further, in this case, the rear side 13b of the baffle 13 is smaller in angle with respect to the rotation center O of the drum 11 than the front side 13a. It is possible to reduce the entanglement caused by twisting of the laundry W caused by the displacement on the rear side 13b, reduce the occurrence of unbalance load due to the entanglement, and further reduce the vibration of the drum 11 and the water tub 6.

  In addition, in the loosening process, the washing process, and the rinsing process, the drum 11 is alternately rotated in both forward and reverse directions at a low speed, so that the laundry is displaced rearward by the baffle 13 by the rotation in each forward direction. Since W is displaced to the front side by the baffle 13 due to the rotation in each reverse direction, in short, it is displaced back and forth so as to be mixed, so that the unwinding process is excellent in unwinding effect and effective in reducing unbalance. Further, the washing process and the rinsing process are effective in improving the cleaning performance.

  6 to 16 show the second to sixth examples (second to sixth embodiments) of the present invention, and the same parts as those of the first example are the same as those of the first example. A description will be omitted with reference numerals, and only different parts will be described.

[Second Embodiment]
In the second embodiment shown in FIG. 6, the rear side 13b of the baffle 13 is parallel to the rotation center O of the drum 11, that is, the angle of the rear side 13b of the baffle 13 with respect to the rotation center O of the drum 11 is 0. °.
By doing in this way, the backside 13b can further reduce the entanglement due to the twist of the laundry W that occurs as the laundry W positioned at the front portion of the drum 11 is displaced rearward, and the imbalance due to the entanglement. Generation of load can be further reduced, and vibrations of the drum 11 and the water tank 6 can be further reduced.

[Third embodiment]
In the third embodiment shown in FIGS. 7 to 9, the inclination angle α of the side surface portions 13c, 13d on the front side 13a of the baffle 13 is made smaller than the inclination angle β of the side surface portions 13c, 13d on the rear side 13b ( α <β). That is, the side surface portions 13c and 13d on the front side 13a of the baffle 13 are set to stand up from the side surface portions 13c and 13d on the rear side 13b.

By doing in this way, the effect which displaces the laundry W located in the front part of the drum 11 back is further excellent. That is, the laundry W positioned at the front portion of the drum 11 can be surely displaced rearward, and thus can be sufficiently smaller than the vibration of the drum 11 and the water tub 6.
In this case, the baffle 13 has the rear side 13b parallel to the rotation center O of the drum 11, but may have an angle similar to that of the first embodiment.

[Fourth embodiment]
In the fourth embodiment shown in FIGS. 10 to 12, is made larger than the front 13a of the height _{H 1,} the height of the rear 13b _{H 2} baffles _{13 (H 1> H 2)} .
Even if it does in this way, it will be further excellent in the effect which displaces the laundry W located in the front part of the drum 11 to the back side, ie, the laundry W located in the front part of the drum 11 more certainly in the back side. Thus, the vibration can be made sufficiently smaller than the vibration of the drum 11 and the water tank 6.

  Also in this case, the baffle 13 has the rear side 13b parallel to the rotation center O of the drum 11, but may have an angle similar to that of the first embodiment. Further, the inclination angle α of the side surface portions 13c and 13d on the front side 13a of the baffle 13 is made smaller than the inclination angle β of the side surface portions 13c and 13d on the rear side 13b, but they are the same angle as in the first embodiment. Also good.

[Fifth embodiment]
In the fifth embodiment shown in FIGS. 13 and 14, the amount of rotation of the drum 11 in the direction (forward direction) in which the angle of the front side 13a of the baffle 13 is increased in each loosening stroke is set in the opposite direction (reverse direction). ) Is controlled to be larger than the rotation amount of the drum 11 (the figure shows only one cycle of forward rotation and reverse rotation of the drum 11). In this case, the amount of rotation of the drum 11 is varied by changing the length of rotation time T ₁ (forward rotation) and T ₂ (reverse rotation) (T ₁ > T ₂ ), but the rotation speed is changed. You may make it differ.

  Even if it does in this way, it will be further excellent in the effect which displaces the laundry W located in the front part of the drum 11 to the back side, ie, the laundry W located in the front part of the drum 11 more certainly in the back side. Thus, the vibration can be made sufficiently smaller than the vibration of the drum 11 and the water tank 6 in each dewatering process after the unraveling process.

[Sixth embodiment]
In the sixth embodiment shown in FIGS. 15 and 16, when washing is performed, that is, when the washing process and the rinsing process are performed, the angle of the front side 13a of the baffle 13 is increased (forward rotation direction). Control is performed so that the rotation amount of the drum 11 is larger than the rotation amount of the drum 11 in the opposite direction (reverse rotation direction) (the figure shows only one cycle of forward rotation and reverse rotation of the drum 11). ing). Also in this case, the amount of rotation of the drum 11 is made different by changing the length of rotation time T ₃ (forward rotation) and T ₄ (reverse rotation) (T ₃ > T ₄ ). You may make it different by changing.

Even if it does in this way, it will be further excellent in the effect which displaces the laundry W located in the front part of the drum 11 to the back side, ie, the laundry W located in the front part of the drum 11 more certainly in the back side. Thus, the vibration can be made sufficiently smaller than the vibration of the drum 11 and the water tank 6 in each dewatering process after the washing process and the rinsing process.
In addition, the present invention is not limited to the embodiments described above and shown in the drawings, and can be implemented with appropriate modifications within a range not departing from the gist.

In the drawings, 1 is an outer box, 2 is a laundry doorway, 6 is a water tub, 8 is a motor (drive device), 11 is a drum, 13 is a baffle, 13a is a front side of the baffle, O is a rotation center of the drum, and θa is a drum. The angle of the front side of the baffle with respect to the rotation center of the drum, 13b is the rear side of the baffle, θb is the angle of the rear side of the baffle with respect to the rotation center of the drum, 17 is the bellows, 13c and 13d are side portions of the baffle, and α is the front side of the baffle. Inclination angle of the side surface, β is an inclination angle of the side surface on the rear side of the baffle, H ₁ is a height on the front side of the baffle, H ₂ is a height on the rear side of the baffle, and T ₁ and T ₂ are drums in the loosening process. , And T ₃ and T ₄ indicate the length (rotation amount) of the rotation time of the drum in the washing process and the rinsing process.

Claims (6)

An outer box having a laundry doorway on the front;
Inside the outer box is elastically supported and arranged in a state where the axial direction is front and rear, a water tank with an open front,
A bellows connecting the opening on the front surface of the aquarium and the laundry doorway of the outer box;
A driving device attached to the rear of the water tank;
A drum which is arranged in a state where the axial direction is front and rear inside the water tank, and a rear portion is connected to the driving device and driven by the driving device;
A baffle provided extending in the axial direction on the inner periphery of the drum,
In what performs laundry and dehydration of laundry,
A drum type washing machine, wherein the front side of the baffle is provided with a larger angle with respect to the center of rotation of the drum than the rear side.   2. The drum type washing machine according to claim 1, wherein the rear side of the baffle is parallel to the center of rotation of the drum.   The drum type washing machine according to claim 1 or 2, wherein an inclination angle of a front side surface portion of the baffle is smaller than an inclination angle of a rear side surface portion.   The drum-type washing machine according to any one of claims 1 to 3, wherein the height of the front side of the baffle is greater than the height of the rear side.   Immediately before the laundry is dehydrated, a control content loosening process is executed in which the rotation amount of the drum in the direction in which the front angle of the baffle is increased is larger than the rotation amount of the drum in the opposite direction. The drum type washing machine according to any one of claims 1 to 4.   2. When performing laundry washing, control is performed to increase the amount of rotation of the drum in the direction in which the angle on the front side of the baffle is larger than the amount of rotation of the drum in the opposite direction. The drum type washing machine according to any one of 5 to 5.

Images