JP2017131370A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine that can efficiently trap waste threads or the like by a simple configuration.SOLUTION: In a washing machine of an embodiment of the present invention, a filter case includes a back case having an inflow opening that allows pumped water to flow into the filter case, and a front case assembled with this back case and having an outflow opening that allows the water flowing in through the inflow opening to flow out into a washing tank through a filter. The back case includes an opposite wall that is located below the inflow opening and is opposed to and spaced from a tank wall of the washing tank, and a guide part that is provided near the inflow opening. The tank wall and the opposite wall form a part of a pumping passage, and water having passed through the pumping passage is guided by the guide part to the inflow opening.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a washing machine.

  2. Description of the Related Art Conventionally, in a washing machine, a pumping path extending from the bottom to the top of a washing tub is provided, and a filter unit is provided at a discharge port portion above the pumping path. In this type of washing machine, pump blades are provided on the back side of the stirring body located at the inner bottom of the washing tub, and the water in the washing tub is returned to the washing tub through the pumping path by the pumping action of the pump blade. Cycle. At this time, yarn waste contained in the circulating water is captured by the filter of the filter unit (see, for example, Patent Document 1).

JP 2012-187183 A

  The filter unit includes a check valve in order to prevent water from flowing backward from the inlet at the lower end of the filter cover. However, before the check valve operates, the water in the filter cover may flow back, and the backflow prevention function and thus the trapping function by the filter has not been fully exhibited.

  In view of the above, a washing machine capable of efficiently capturing lint and the like with a simple configuration is provided.

  The washing machine according to the present embodiment includes a washing tub, an agitator that is disposed on the inner bottom of the washing tub and has a back blade on the back side, and a pump action of the back blade that accompanies the rotation of the agitator. A water channel cover that forms a pumping channel that pumps the water in the tank wall along the inside of the tank wall, and a filter case that is provided on the water channel cover and has a filter for capturing lint and the like, The filter case includes a back case having an inflow port through which pumped water flows into the inside and a front case combined with the back case, and the water that has flowed in from the inflow port passes through the filter into the washing tub. And a front case having an outlet for allowing the outlet to flow out. The back case includes an opposing wall portion positioned below the inflow port and facing and separated from the tank wall, and a guide portion provided in the vicinity of the inflow port, and the tank wall and the A part of the pumping channel is formed with the facing wall, and the water passing through the pumping channel is guided to the inlet by the guide unit.

Enlarged longitudinal side view of the filter case portion in the washing machine of one embodiment Broken side view schematically showing the internal structure of the washing machine The perspective view which shows the state which removed the filter case with a part of washing tub Enlarged perspective view from the back side of the filter case with the back case shifted

  Hereinafter, an embodiment applied to a fully automatic dehydrating combined washing machine will be described with reference to the drawings. The outer box 1 of the washing machine shown in FIG. 2 is formed by connecting a lower base 1a and an upper top cover 1c to a box body 1b. Inside the outer box 1, a water tank 2 is elastically supported by an elastic suspension mechanism 3 (only the suspension mechanism 3 at one corner is shown in FIG. 2) composed of support shafts 3 a and springs 3 b arranged at four corners. Has been.

  The water tank 2 has a bottomed cylindrical shape as a whole, and a driving device 4 is provided on the lower surface side of the bottom portion. The drive device 4 includes, for example, an outer rotor type DC brushless motor 4a, a clutch mechanism (not shown), and the like. A drain port 5 is provided at the bottom of the water tank 2, and drains from the drain port 5 through the drain valve 6 and the drain hose 7 to the outside of the machine. The drain port 5 is provided with an air trap 8 for water level detection, and a water level sensor (not shown) is connected to the air trap 8 through an air tube 9. Moreover, the control apparatus of the washing machine which is not illustrated performs the water supply operation | movement which supplies water to the predetermined water level mentioned later based on the water level detected by the water level sensor.

A ring-shaped tank cover 10 is provided at the upper edge of the water tank 2, and a lid 11 that can be opened and closed by folding in half is provided on the top cover 1 c.
A washing tub 12 that functions as a washing tub and a dehydration tub is rotatably disposed inside the water tub 2. The washing tub 12 has a bottomed cylindrical shape as a whole, and a large number of dewatering holes 13 are provided in a body portion 12a serving as a peripheral wall portion of the tub wall. The washing tub 12 is provided with a substantially ring-shaped rotary balancer 14 at the upper end, and a stirring body 15 is disposed at the inner bottom. The stirrer 15 is integrally provided with a radial water flow generating blade 16 for generating a washing water flow in the washing tub 12 on the upper surface side, and a radial back blade 17 having a pump action described later on the lower surface side. ing. At the time of washing, only the agitator 15 is directly and alternately rotated in both forward and reverse directions by the motor 4a of the driving device 4 while the washing tub 12 is stopped to generate the washing water flow. On the other hand, at the time of dehydration, the washing tub 12 and the stirrer 15 are synchronously rotated at a high speed in one direction by the drive device 4 to centrifugally dehydrate the laundry in the laundry tub 12.

  And the pumping path 20 extended in the up-down direction is formed in the inner surface side of the washing tub 12 along the trunk | drum 12a. 3 is attached to the inner surface of the trunk portion 12a from the outer peripheral side of the back blade 17 of the inner bottom portion to the upper rotary balancer 14 side. The water channel is formed so as to be surrounded by the water channel cover 21 and the body 12a. The lower end portion of the pumping path 20 communicates with the pump chamber 18 on the back blade 17 side defined by the stirring body 15 and the lower surface of the washing tub 12.

  The water channel cover 21 is made of, for example, a synthetic resin, and has a gentle arc surface shape that protrudes toward the rotation axis 12b of the washing tub 12 so as to form a water channel space, and is provided at a portion where the dewatering hole 13 is not provided in the trunk portion 12a. Yes. As shown in FIGS. 2 and 3, the detergent cover 22 is provided at the upper end of the water channel cover 21. The detergent charging portion 22 is supported by the lower pivot support portion 22a so as to be rotatable between an open position and a storage position. At the storage position shown in FIGS. 21 is held.

  A filter case 23 is provided at an intermediate portion in the vertical direction of the water channel cover 21. Hereinafter, the filter case 23 and its mounting structure will be described in detail with reference to FIGS. 4 is an enlarged perspective view from the back side of the filter case 23, that is, from the outer peripheral side of the washing tub 12. For convenience of explanation, the front case 24 and the back case 30 constituting the filter case 23 are arranged in the longitudinal direction. Is slightly shifted.

  That is, the front case 24 and the back case 30 are both made of synthetic resin, for example, and have a rectangular thin box shape having the internal space S (see FIG. 1) in a state where the both 24 and 30 are combined. Among these, the front case 24 has a front wall portion 24a formed so as to be flush with the water channel cover 21, and left and right protrusions provided on the outer periphery of the front wall portion 24a as shown in FIG. The frame portions 24b and 24c and the upper frame portion 24d are integrally formed, and form a substantially rectangular lid shape in which the back side and the bottom side are opened. The left and right frame portions 24b and 24c are in sliding contact with the back case 30 so that the back case 30 can be guided in the longitudinal direction (in the direction of arrow 100 in FIG. 4) on the inside thereof. In addition, although illustration is abbreviate | omitted, the left-right frame part of the back case 30 is formed so that the part of the protruding line | wire or recessed line | wire extended in the direction of arrow 100 may be formed inside the left-right frame parts 24b and 24c, respectively. A concave or convex portion can be formed on each of the two, and the front case 24 and the back case 30 can be slid on the portions and combined.

  The front case 24 is provided with a locking means for locking the combined state with the back case 30. Specifically, the front case 24 has locking holes 26b and 26c (only one hole 26b shown in FIG. 4) formed at the lower ends of the left and right frame portions 24b and 24c. Lock. The locking piece 26d formed on the upper frame portion 24d of the front case 24 locks the upper portion of the back case 30 (see FIGS. 1 and 4).

  The front wall portion 24a of the front case 24 has a gentle arc surface shape similar to that of the water channel cover 21, and a large number of water outlets 25 are formed so as to penetrate in the plate thickness direction to form a lattice shape. . On the back side of the front wall portion 24a, a net 27 (only part of the net 27 is shown in FIG. 1) is stretched as a filter so as to face the respective outlets 25. Further, as shown in FIGS. 1 and 3, a handle portion 28 that is recessed toward the back side and a flexible fitting claw portion 29 are formed on the upper portion of the front wall portion 24 a, and the entire filter case 23 is When attached to the mounting portion 40 described later, the fitting claw portion 29 holds the mounting portion 40.

  On the other hand, the back case 30 integrally includes the back wall portions 30a and 30t shown in FIG. 4, and left and right frame portions 30b and 30c and an upper frame portion 30d formed on the outer peripheral portions of the back wall portions 30a and 30t. And the lower side is open. Specifically, as shown in FIG. 1, the back walls 30 a and 30 t are formed with inlets 31 through which water pumped through the pumping channel 20 flows into the internal space S of the filter case 23.

  Of the back wall portions 30a and 30t of the back case 30, the back wall portion 30a located above the inflow port 31 is an upper wall portion, and the back wall portion 30t located below is an opposing wall portion. In this case, the upper side wall portion 30a and the opposing wall portion 30t are not strictly flush with each other, and the upper side wall portion 30a is shifted to a position closer to the front side (left side in FIG. 1) than the opposing wall portion 30t. In other words, the upper wall portion 30a and the opposing wall portion 30t are parallel to each other, but have a stepped shape shifted in the plate thickness direction of the wall portions 30a and 30t. In addition, the alternate long and two short dashes line 102 in FIG. 1 is attached in order to clarify the level difference from the upper side wall portion 30a in correspondence with the opposing wall portion 30t.

  As shown in FIG. 1, in the back case 30, the opposing wall 30t is opposed to and separated from the tank wall (hereinafter referred to as the tank wall 12a) of the trunk 12a of the washing tub 12, and the tank wall 12a A part 20a of the pumping channel 20 is formed with the facing wall 30t.

  In the back case 30, a rib (hereinafter referred to as a guide rib 32) as a guide portion is integrally formed at the lower end portion of the upper side wall portion 30 a so as to protrude to the outside of the internal space S. The guide rib 32 extends in the vicinity of the inlet 31 over the left and right frame portions 30b and 30c so as to block the pumping channel 20a, that is, over the entire width direction of the pumping channel 20a. The guide rib 32 extends from the lower end of the upper side wall portion 30a to the position where the tip end of the rib 32 substantially contacts the tank wall 12a, and gradually toward the outer side and the upstream side of pumping water from the base end toward the tip. By extending, it inclines to the inflow port 31 side. Thereby, in the cross-sectional view of FIG. 1, the guide rib 32 and the upper side wall portion 30 a have the same thickness dimension and form a “heavy” shape, and the water passing through the pumping channel 20 a is supplied to the inlet 31 by the guide rib 32. It is easy to guide.

  As shown in FIG. 4, the left and right frame portions 30 b and 30 c of the back case 30 are formed so as to extend in the vertical direction along the inside of the frame portions 24 b and 24 c of the front case 24. Locking protrusions 33b and 33c (only one protrusion 33b is shown in FIG. 4) are symmetrically provided at the lower ends of the frame portions 30b and 30c of the back case 30 so as to correspond to the locking holes 26b and 26c. Is formed.

  In this way, the front case 24 and the back case 30 are combined by sliding the frame portions 30b, 30c of the back case 30 upward in the direction of the arrow 100 in FIG. 4 with respect to the frame portions 24b, 24c of the front case 24. With this combination, the locking projections 33b and 33c of the back case 30 are locked to the locking holes 26b and 26c of the front case 24, and the upper frame portion 30d of the back case 30 is locked to the locking piece 26d of the front case 24. The filter case 23 having the internal space S is configured in the locked state.

  As shown in FIG. 3, the water channel cover 21 is provided with a rectangular opening 40 a that matches the outer shape of the case 23 as the mounting portion 40 of the filter case 23 described above. The opening 40a is formed at an intermediate portion in the vertical direction of the water channel cover 21 so that the inflow port 31 of the filter case 23 is positioned in accordance with, for example, the middle water level L2 (see the two-dot chain line in FIG. 2) in the washing tub Has been. In addition, the water levels L1 and L2 shown by the two-dot chain line in FIG. 2 correspond to the capacity of the laundry put into the washing tub 12, and are less than, for example, when the rated capacity is at a high load (9 kg). The low water level L1 of about 1/3 at the time of low load (3 kg) and the low water level L2 of about 1/2 at the time of medium load (6 kg) are represented. The opening 40a for the filter case 23 may be formed so that the inflow port 31 is located in the region from the low water level L1 to the middle water level L2.

  As shown in FIGS. 1 and 3, the attachment portion 40 of the filter case 23 includes the opening 40 a formed in the water channel cover 21, a fitting recess 40 b and a receiving portion 40 c at the periphery thereof. The fitting recessed part 40b is a recessed part which is located at the upper edge of the opening 40a and is detachably fitted to the fitting claw part 29 of the filter case 23. The receiving portion 40c extends from the lower edge of the opening 40a to the tank wall 12a side so as to receive the lower surface portion of the filter case 23, in particular, the opposing wall portion 30t of the filter case 23 shown in FIG. Therefore, in FIG. 1, the inlet 20in of the pumping path 20a on the back side (the right side) of the filter case 23 is secured on the right side of the receiving part 40c, and the water pumped into the pumping path 20a is filtered by the receiving part 40c. It is set as the structure which does not hit the lower surface part of.

  When the filter case 23 is placed in the combination state and placed on the receiving portion 40c while being fitted to the opening 40a, and the fitting claw portion 29 is fitted into the fitting recess 40b, the attachment portion 40 is obtained. It is detachably attached to. On the other hand, if the attached filter case 23 is pulled up by placing the finger on the handle portion 28, the fitting claw portion 29 bends and the fitting at the mounting portion 40 is released, so the filter case 23 is removed as it is. Can do. Further, when the removed filter case 23 is pulled away from the front case 24 by sliding the back case 30, the locking projections 33b, 33c locked to the locking holes 26b, 26c and the locking pieces 26d, The upper frame portion 30d is detached. Thereby, the filter case 23 can be easily disassembled, and the lint and the like attached to the net 27 of the front case 24 can be removed.

Next, the operation of the above configuration will be described.
During washing, laundry and detergent (not shown) are put into the washing tub 12. When the detergent is introduced through the detergent introduction part 22, the detergent moves toward the inner bottom of the washing tub 12 so as to be distributed to the left and right of the filter case 23 inside the water channel cover 21. That is, even if the detergent is passed through the pumping path 20 from above, the detergent does not directly enter the filter case 23 by the guide rib 32 or the like, and can be easily dissolved by using pumped water.

  When the washing operation is started, water is supplied into the washing tub 12 as a water level corresponding to the amount of laundry, for example, up to a water level L2 in FIG. 2 based on the water level detected by the water level sensor. Thereafter, with the driving device 4 driven, the agitator 15 is alternately rotated in both forward and reverse directions while the washing tub 12 is stopped, and the washing water flow is generated in the washing tub 12 by the water flow generating blades 16. The laundry is done.

  In this case, the water in the pump chamber 18 in the washing tub 12 is pumped toward the pumping path 20 by the pumping action of the back blade 17 accompanying the rotation of the stirring body 15. Thereby, as shown by the arrows 101 and 101a in FIGS. 1 and 2, the water pumped through the pumping channels 20 and 20a flows into the filter case 23 from the inlet 31. Specifically, the water pumped in the direction of arrow 101 from the lower side of the pumping channel 20 in FIG. 1 does not hit the lower surface of the filter case 23 by the receiving portion 40c, and enters the inlet 20in of the pumping channel 20a on the back side of the filter case 23. Then, as it is pumped in the direction of the arrow 101a as it is, it is guided to the guide rib 32 and flows into the filter case 23 from the inlet 31. When the water that has flowed into the filter case 23 is discharged into the washing tub 12 from the outlet 25, thread waste and other foreign matters in the water are captured by the net 27 by passing through the mesh of the net 27. . Thus, during washing, the pumping by the back blade 17 toward the pumping channel 20 is repeated, so that water circulating in the pumping channel 20 is discharged into the washing tub 12 through the mesh of the net 27.

  As described above, in the filter case 23, the back case 30 is positioned below the inlet 31 and opposed to the tank wall 12a and spaced away from the tank wall 12a, and the guide provided in the vicinity of the inlet 31. Guide rib 32 as a part, and part 20a of pumping channel 20 is formed by tank wall 12a and opposing wall 30t, and water passing through pumping channel 20a is guided to inlet 31 by the guide unit. It was configured as follows.

  According to this, in the structure which forms the part 20a of the pumping path 20 between the opposing wall part 30t of the filter case 23, and the tank wall 12a of the washing tub 12, the capacity | capacitance of the pumping path 20a and the filter case 23 exists. However, it is possible to suppress an increase in size of the filter case 23 in the thickness direction of the tank wall 12a. Moreover, the filter case 23 can guide the water pumped up through the pumping path 20a to the inflow port 31 by the guide portion, and efficiently captures lint and the like with a simple configuration that does not require a check valve. be able to.

Since the guide portion is provided so as to block the pumping path 20a, the water pumped up by the pumping action of the back blade 17 can be more efficiently guided to the inlet 31.
The guide portion is formed of a rib provided integrally with the back case 30 so as to project outside the internal space S of the filter case 23. According to this, the thickness dimension of the back case 30 and the guide part can be reduced, the guide part can be easily molded, and the manufacturing cost can be reduced.

  The back case 30 has an upper side wall portion 30a formed with the ribs located on the upper side across the inflow port 31 and an opposing wall portion 30t located on the lower side in the thickness direction of the wall portions 30a and 30t. It is in a stepped shape. Thus, the pumped water flows more into the filter case 23 by shifting the upper wall portion 30a and the opposing wall portion 30t formed with ribs in the plate thickness direction (leftward in FIG. 1). An easy configuration can be obtained. Further, with respect to the shape of the filter case 23 or the capture of lint etc., a dead space can be eliminated and a simpler configuration can be achieved. In addition, if the said wall parts 30a and 30t are made mutually parallel like this embodiment, it can be said that it is a more preferable structure also in relation to the tank wall 12a.

  Unlike this embodiment, when the inlet of the filter case is provided above the middle water level L2, if the amount of laundry is small and the water level is L1, sufficient water cannot be pumped up to the inlet, such as yarn waste. There is a possibility that it cannot be captured. In this regard, the filter case 23 of the present embodiment is provided so that the inflow port 31 is located in the region from the low water level L1 to the middle water level L2 in the washing tub 12. According to this, even if the water level in the washing tub 12 is low, it is possible to efficiently capture yarn waste and the like.

  The washing machine described above is not limited to the above-described embodiment. For example, instead of the guide rib 32, a guide portion that is not a rib can be provided. In this case, although not specifically illustrated, for example, the plate thickness of the upper side wall portion 30a in FIG. 1 is set so as to increase from the position of the two-dot chain line 102 to the tank wall 12a side, and the thickness is increased. The lower surface of the side wall portion is formed to be an inclined surface that is inclined similarly to the guide rib 32. Such an upper side wall portion may be hollow or non-hollow, but has an effect similar to that of the guide rib 32 because it has a configuration in which the thickness is increased so that its lower surface forms a guide portion.

  While several embodiments of the present invention have been described, these embodiments are presented by way of example. As long as the guide portion in the above example is formed so as to block the pumping path, it may be formed so as to be slightly separated from the tank wall 12a. Further, for example, a combination of the back case and the front case, in which the locking protrusions 33b and 33c of the back case 30 are pivotally supported and supported by the locking holes 26b and 26c of the front case 24 so as to be swingable. A filter case may be configured.

  Further, the filter case 23 may be arranged so that the inlet 31 is located in a region other than the region from the low water level L1 to the middle water level L2 in the washing tub 12 according to the pump performance of the back blade. Thus, the above embodiment is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  In the drawings, 12 is a washing tub, 12a is a tank wall, 15 is a stirring body, 17 is a back blade, 20, 20a is a pumping channel, 21 is a water channel cover, 23 is a filter case, 24 is a front case, 25 is an outlet, Reference numeral 27 denotes a net (filter), 30 denotes a back case, 30a denotes an upper wall portion, 30t denotes an opposing wall portion, 31 denotes an inflow port, and 32 denotes a guide portion.

Claims (5)

A washing tub,
An agitator that is disposed at the inner bottom of the washing tub and has a back blade on the back side;
A water channel cover that forms a pumping channel for pumping water in the washing tub along the inside of the tub wall by the pumping action of the back blade accompanying the rotation of the stirring body,
A filter case provided on the water channel cover and having a filter for capturing lint etc.,
The filter case is
A back case having an inflow port for allowing the pumped water to flow inside;
A front case to be combined with the back case, the front case having an outlet that allows water flowing in from the inlet to flow out into the washing tub through the filter,
The back case is
An opposing wall located on the lower side of the inlet and spaced away from the tank wall;
A guide portion provided in the vicinity of the inflow port,
A washing machine configured to form a part of the pumping path by the tank wall and the facing wall part, and to guide water passing through the pumping path to the inflow port by the guide part.   The washing machine according to claim 1, wherein the guide portion is provided so as to block the pumping path.   The washing machine according to claim 1 or 2, wherein the guide portion is formed of a rib integrally provided on the back case so as to project outside the internal space of the filter case.   The back case has a stepped shape in which the upper side wall portion on which the rib located on the upper side with the inflow port is formed and the opposing wall portion located on the lower side are shifted in the plate thickness direction of the wall portion. 4. The washing machine according to claim 3, wherein   The said filter case is a washing machine as described in any one of Claims 1-4 provided so that the said inflow port may be located in the area | region of the low water level in the said washing tub from the middle water level.

Images