JP3439108B2 - Washing machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine, and more particularly, to a single-tub washing machine in which a washing and dewatering tub is rotatably provided in an outer tub. 2. Description of the Related Art FIG. 6 is a side sectional view showing the structure of a main part of a conventional fully automatic washing machine described in Japanese Patent Application Laid-Open No. 8-66589. In this washing machine, a washing and dewatering tub 3 is supported by a rotating shaft 4 in an outer tub 2. A circulation channel 17 extending in the vertical direction is provided inside the side wall of the washing and dewatering tub 3. A pumping opening 18 is provided at a lower end of the circulation channel 17, and a water discharge opening 19 is provided immediately below the balance ring 16 at the upper end.
A net-shaped lint filter 20 is detachably attached to the outlet of the water discharge opening 19. [0003] When the pulsator 5 at the bottom of the washing / dewatering tub 3 rotates, the pulsator 5 is pumped by the back blades 5b radially formed on the back surface of the pulsator 5, and is located in the gap between the bottom of the washing and dewatering tub 3 and the bottom of the outer tub 2. Water is sucked up through the water inlet 24.
This water is fed into the water pumping opening 18, rises in the circulation channel 17, and is discharged from the water discharging opening 19 into the washing / dewatering tub 3. Dust such as lint mixed into the water is collected by the lint filter 20. On the other hand, the water discharged into the washing and dewatering tub 3 flows out to the outer tub 2 through the water passage holes 3a formed on the side wall of the washing and dewatering tub 3 and circulates. In the above-mentioned conventional washing machine, when the water level for washing and rinsing is relatively high (for example, the position of water level H in FIG. 6), a large amount of water flows through the circulation water channel 17. Of water is lifted. Therefore, dust mixed in the washing water can be efficiently collected by the lint filter 20. However, when the amount of laundry is small and the water level is set at a low position (for example, at the position of the water level L in FIG. 6), the pumping action of the back blade 5b is weakened, and water is supplied to the pumping opening 18 with a sufficiently high water pressure. You will not be able to send it. Then, the amount of water rising in the circulating water channel 17 decreases, and the efficiency of dust collection by the lint filter 20 decreases. SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and its main object is to provide a high lint collection even when washing or rinsing is performed with a small amount of laundry and a low water level. An object of the present invention is to provide a washing machine capable of maintaining efficiency. Means for Solving the Problems and Embodiments of the Invention To solve the above problems, the present invention provides a washing and dewatering tub provided in an outer tub, A rotating blade provided rotatably at the bottom is rotated, and pumping action of a back blade formed on the lower surface of the rotating blade sucks up water between a washing dewatering tub immediately below the rotating blade and an outer tub to thereby wash the dewatering tub. In the washing machine that circulates, has an inlet opening outside the rotor,
A circulating water channel communicating with the inlet opening and extending upward along the inner surface of the washing / dewatering tub side wall, and having an outlet opening provided at a position lower than a standard washing water level in the washing / dewatering tub; Into the circulation channel to the outlet opening
Branches of that water, a lint collecting unit for removing suspended solids mixed in the water, the pumping action of the rear vanes of the rotor blades
The water sent to the inlet opening of the circulation channel by
Ascending the road and squirting into the washing dehydration tub from the exit opening
In both cases, part of the water branches off and reaches the lint collection section.
To remove solid suspended matter such as lint,
The lint collecting section is configured to return to the washing and dewatering state.
Intake of water into the channel wall that forms the circulation channel with the tank side wall
A mouth was provided and taken in from the circulation channel through the intake opening
The water is led to the lint filter, and
The water channel wall just above the water opening is
Raise the water channel side to narrow the gap,
It is characterized in that a rising part is formed where a part of the rising water contacts . In the washing machine according to the present invention, when the rotor is rotated during the washing or rinsing process, the water sucked up by the pumping action of the back blade of the rotor is sent to the outer peripheral side of the lower surface of the rotor. It is sent to the inlet opening of the circulation channel. This water rises in the circulation channel and gushes out of the outlet opening into the washing / dewatering tub. In addition, a part of the water is branched to reach the lint collecting section, and solid suspended matters such as lint are removed. [0008] Since the height difference between the inlet opening and the outlet opening of the circulating water channel is smaller than that of the circulating water channel provided in the above-mentioned conventional washing machine, the pressure required to push up water into the circulating water channel is small. Therefore, even when the water level in the washing and dewatering tub is relatively low, the amount of water circulating to the washing and dewatering tub through the circulation water channel hardly decreases. Therefore, the amount of water passing through the lint collection unit is hardly affected by the water level, and dust such as lint can be always efficiently collected. In addition, in a state where water above the standard washing water level is stored in the washing and dewatering tub, a large amount of water spouted from the outlet opening of the circulation channel directly hits the laundry and passes through the laundry. At times, dirt is removed well, and the washing liquid contained in the laundry is easily discharged from the laundry during the rinsing process. In addition, since the water flow is generated directly in the water, even when the amount of the laundry is large and it is difficult to rotate the laundry up and down, the strong vertical water flow promotes the replacement of the laundry up and down. [0012] Further, when the channel wall immediately above the water intake opening is raised to the channel side so as to narrow the gap between the opposite side wall of the washing and dewatering tub, a raised portion is formed. The water rising in the waterway contacts the raised portion, and a part of the water is surely branched and flows smoothly into the intake opening. When the circulation channel has a flat cross section, and a portion in the longitudinal direction of the cross section is a protruding portion, water rises smoothly without being affected by the protruding portion at a position apart from the protruding portion in the same cross section. . For this reason, it is possible to prevent the momentum of the water spouting from the upper opening from weakening. According to the washing machine of the present invention, even if the washing water level set for easy washing is too low, a large amount of lint is collected in the lint collecting section. Water circulates. Therefore, high lint collecting efficiency can be maintained regardless of the washing water level.
In addition, a large amount of water gushes vigorously from the outlet opening of the circulation channel to hit the laundry and pass through the laundry, so that the rinsing performance is improved. Furthermore, since a water flow is also likely to be generated in the washing / dehydrating tub in the vertical direction, the replacement of the laundry in the vertical direction is promoted, and the washing is easy to wash and unevenness is reduced. FIG. 1 shows an embodiment of a washing machine according to the present invention.
This will be described with reference to FIGS. FIG. 1 is a side sectional view showing the entire configuration of the washing machine of the present embodiment, FIG. 2 is an enlarged end view showing a detailed structure of a portion A (circulation channel 21) in FIG. 1, and FIG. Enlarged sectional view showing a detailed structure of each member to be
FIG. 4 is a plan view of the short circulating water passage 21 in FIG. 2 as viewed from the direction B, and FIG. 5 is a plan view of the main body member 30 in FIG. First, the overall configuration of the washing machine of the present embodiment will be described with reference to FIG. An outer tub 2 is supported by four hanging rods (not shown) inside the outer box 1, and a washing and dewatering tub 3 having a large number of water holes 3a around the outer tub 2 is provided in the outer tub 2. ,
It is rotatably supported on a rotation shaft 4 provided on the bottom wall. A pulsator 5 is rotatably provided at the bottom of the washing and dewatering tub 3, and rotational power of a motor 6 attached to the lower surface of the outer tub 2 is supplied by a motor pulley 7, a belt 8, and a main pulley 9.
The power is transmitted to the washing / dewatering tub 3 and the pulsator 5 via the power switching mechanism 10. A water supply pipe 11 connected to a water tap (not shown) is provided at the rear of the upper surface of the outer box 1, and is connected via a water supply valve 12 to a water inlet 13 provided with a detergent box and the like. On the other hand, a drain pipe 14 is connected to the rear of the bottom wall of the outer tub 2, and is connected to an external drain port or the like via a drain valve 15. A balance ring 16 is attached to the upper end of the washing / dewatering tub 3, and a long circulating channel 17 extending vertically from the bottom to a position immediately below the balance ring 16 is provided inside the side wall of the washing / dewatering tub 3. Are formed. A pumping opening 18 is provided at the lower end of the elongated circulation channel 17, while a water discharge opening 19 is provided at the upper end. The water discharge opening 19
A lint filter 20 for collecting lint is detachably attached to an outlet of the lint filter. On the other side of the side wall of the washing and dewatering tub 3, a short circulation channel 21 is formed extending vertically from the bottom to the vicinity of the center. Short circulation channel 2
A pumping opening 22 is provided at the lower end of 1, while a spouting opening 23 is provided at the upper end. In FIG. 1, the long circulation channel 17 and the short circulation channel 21 are provided at opposing positions in the washing / dewatering tub 3. A total of two short circulation channels 21 are arranged at a rotation position of 120 °. The configuration of the short circulation channel 21 will be described later in detail. On the upper surface of the pulsator 5 at the bottom of the washing and dewatering tub 3, stirring blades 5a for stirring water are formed, and on the lower surface, back blades 5b are formed radially at substantially equal rotation intervals. The gap between the outer peripheral edge of the pulsator 5 and the inner wall of the washing and dewatering tub 3 is very small, and the pulsator 5 is provided with water discharge openings 5c vertically penetrating at appropriate intervals. Further, a water passage 24 penetrating vertically is provided on the bottom wall of the washing and dewatering tub 3 directly below the pulsator 5. For example, when the pulsator 5 is driven to rotate in a state where water is stored in the outer tub 2 to the position of the water level H, the gap between the lower surface of the pulsator 5 and the bottom wall of the washing and dewatering tub 3 is formed. As a result, a pump action is generated by the back blade 5b. Thereby, water in the gap between the bottom wall of the washing and dewatering tub 3 and the bottom wall of the outer tub 2 is sucked up through the water inlet 24 and sent to the outer peripheral side of the lower surface of the pulsator 5. This water is ejected upward through the water discharge opening 5c of the pulsator 5, and
With high pressure, they are fed into the pumping openings 18, 22 of the long and short circulation channels 17, 21, respectively. The rising water flow spouting from the spout 5c moves with the rotation of the pulsator 5, so that the washing dewatering tub 3
The water is evenly applied to the laundry sinking down from inside from below. On the other hand, the water sent to the pumping opening 18 of the long circulation channel 17 rises in the circulation channel 17 and is discharged to the discharge opening 19.
And fall into the washing and dewatering tub 3. For this reason, water falls on the laundry floating near the water surface in the washing dewatering tub 3 from above. Further, the water fed into the pumping opening 22 of the short circulation channel 21 rises in the circulation channel 21 and gushes into the washing / dewatering tub 3 from the ejection opening 23. Therefore, the laundry that is rotating in the horizontal direction in the washing and dewatering tub 3 is exposed to water from the side. In this way, the water at any position in the washing and dewatering tub 3 is vigorously hit by the water,
The water passes through the laundry. Therefore, during the washing process, the removal of dirt is promoted, and during the rinsing process, the discharge of the washing liquid sucked by the laundry is promoted. Further, in the washing / dewatering tub 3, not only a horizontal water flow due to the stirring blade 5a but also a vertical rotating water flow is generated. As a result, the laundry is easily turned upside down, and unevenness of washing and rinsing is reduced. When water is discharged from the water discharge opening 19, the water passes through the lint filter 20, so that lint such as lint mixed in the water is collected by the lint filter 20. However, the pumping opening 18 of the long circulation channel 17
The height difference between the water discharge opening 19 and the water discharge opening 19 is large.
To raise the water up to the pumping opening 18 with high pressure
Need to send water to For this reason, a relatively low water level due to, for example, a small load (for example, the position of the water level L in FIG. 1)
If rinsing is performed, sufficient pressure cannot be obtained, and the amount of water discharged from the water discharge opening 19 decreases. As a result, the lint collection efficiency of the lint filter 20 is significantly reduced. Therefore, in the washing machine of the present embodiment, the lint filter 5 is also provided in the short circulation channel 21 by the following structure.
0 is attached. That is, as shown in FIG. 3, the short circulation water channel 21 is attached to the side wall of the washing and dewatering tub 3 and forms a main body member 30 (FIG. (C)), a filter cover 40 which is mounted on the front surface of the main body member 30 and forms a filter chamber between the main body member 30 and a lint filter 50 which is mounted inside the filter chamber. The main body member 30 and the filter cover 40 are preferably made of a resin material such as a polypropylene resin. As shown in FIGS. 3 (c) and 5, a part of the water channel wall 31 extending in the vertical direction bulges to the back side (the side wall side of the washing and dewatering tub 3) and has a concave portion. A water intake opening 33 for branching water is provided in the water channel wall 31 immediately below the recess 32. The water channel wall 31 immediately above the concave portion 32 is greatly bulged forward to form a convex portion 34, and a jet opening 23 extending horizontally and long is formed above the convex portion 34. On the other hand, the filter cover 40 is shown in FIG.
As shown in FIG. 4 and FIG. 4, a large number of water passage holes 41 are drilled downward, and the upper center is largely recessed corresponding to the recess 32 to form a hook portion 42. The front of the hook portion 42 has an opening just enough to insert a finger,
The filter cover 40 is fixed to the main body member 30 by the engagement between the claw 43 projecting from the upper surface of the hook portion 42 and the lower edge projection 35 of the projection 34. As shown in FIG. 3B, the lint filter 50 has a collection bag 52 made of a nylon net attached to an annular support member 51 made of a resin material such as a polypropylene resin. When attaching the filter cover 40 to the main body member 30, first, the support member 51 of the lint filter 50 is hooked on the projection 44 on the back surface of the filter cover 40, and then the filter cover 40 is attached to the main body member 30. Press Then, as shown in FIGS. 2 and 4, the filter cover 40 is fitted and fixed to the main body member 30. In this state, since the water passage 36 and the filter chamber 45 both have a flat cross section, the protrusion to the inner peripheral side of the washing and dewatering tub 3 is small, and there is little possibility that the laundry is caught. When removing the filter cover 40 from the main body member 30, a finger is inserted into the hook portion 42 and strongly pulled toward the front side (the inner peripheral side of the washing and dewatering tub 3), so that the claw 43 and the lower edge end projection 35 Of the filter cover 40 is released.
And the lint filter 50 come off integrally. Thereby, the lint filter 50 can be easily cleaned. In the washing machine of the present embodiment having the above-described structure, when the pulsator 5 is rotated, water is fed into the water pumping opening 22 by the pump action of the back blade 5b. This water rises in the water channel 36 formed between the water channel wall 31 and the side wall of the washing and dewatering tub 3 as shown by arrows b and c in FIGS.
Since the gap between the recess 32 and the side wall of the washing and dewatering tub 3 is narrower than both sides and below, the water that has risen near the position of the arrow b in FIG. From the filter chamber 45. On the other hand, in the waterway 36,
The water that has risen near the position indicated by the arrow c in FIG. 5 reaches the ejection opening 23 without being affected by the recess 32, and spouts vigorously into the washing and dewatering tub 3. As described above, by providing the recess 32, a part of the water sent into the water pumping opening 22 is surely branched to the filter chamber 45 without damaging the force of the water spouting from the spouting opening 23. As described above, the water that has flowed into the filter chamber 45 is removed of dust when passing through the collection bag 52, and returns to the washing / dewatering tub 3 through the water holes 41. Since the height difference between the pumping opening 22 and the discharge opening 23 of the short circulation channel 21 is considerably smaller than that of the long circulation channel 17, even when the water level during the rinsing stroke is low and the pressure of the water sent into the pumping opening 22 is low. Even when lowered, a sufficient amount of water is lifted and passes through the lint filter 50. Therefore, high lint collection efficiency can be achieved. In the above embodiment, the water intake opening 33 for branching water is provided in the middle of the water channel wall 31. However, a water intake opening for water branch is provided near the water intake opening 22, and a lint different from the water channel 36 is provided. The collecting water channel may be arranged from the water opening to the filter chamber 45. The above embodiment is merely an example, and it is apparent that the embodiment can be changed or modified within the scope of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view showing the entire configuration of a washing machine according to one embodiment of the present invention. FIG. 2 is an enlarged end view showing a detailed structure of a portion A in FIG. FIG. 3 is an enlarged sectional view showing a detailed structure of each member constituting the short circulation channel. FIG. 4 is a plan view of the rectangular circulation channel in FIG. 2 viewed from a direction B. FIG. 5 is a plan view of the main body member of FIG. FIG. 6 is a side sectional view showing a configuration of a main part of a conventional washing machine. [Description of Signs] 2 ... Outer tub 3 ... Washing / dewatering tub 4 ... Rotating shaft 5 ... Pulsator 5a ... Agitating blade 5b ... Back blade 5c ... Water discharge opening 17 ... Long circulation water channel 18, 22 ... Pumping opening 19 ... Water discharging opening 21 … Short circulation water channel 23… ejection opening 24… water passage 30… body member 31… water passage wall 32… recess 33… intake opening 34… protrusion 35… lower edge end projection 40… filter cover 41… water passage 42… Hook part 43 ... Claw 44 ... Protrusion part 45 ... Filter chamber 50 ... Lint filter 51 ... Support member 52 ... Collection bag

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-9-56986 (JP, A) JP-A-4-285595 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) D06F 1/00-51/02

Claims (1)

(57) [Claims 1] A washing and dewatering tub is provided in an outer tub, and a rotating blade provided rotatably provided at the bottom of the washing and dewatering tub is rotated to form on a lower surface of the rotating wing. A washing machine for sucking water between the washing and dewatering tub immediately below the rotor and the outer tub and circulating the water through the washing and dehydration tub by a pumping action of the back blade, wherein an inlet opening is provided outside the rotor; A circulating water passage that communicates with the inlet opening and extends upward along the inner surface of the washing / dewatering tub side wall, and has an outlet opening provided at a position lower than a standard washing water level in the washing / dewatering tub, and an inlet opening of the circulating water passage. Sent into the outlet opening
Water circulation passage in branches the water rising to, a lint collecting unit for removing suspended solids mixed in water Te, rotary wing
Pumped to the opening of the circulation channel by the action of the back blade
The trapped water rises in the circulation channel and is washed from the outlet opening.
As it gushes into the dehydration tank, part of the water is branched off.
To the lint collecting section where solid suspended matter such as lint is removed.
And return to the inside of the washing and dewatering tub.
An intake opening is provided in a channel wall forming the circulation channel,
Lint-filled water taken from the circulation channel through the water opening
Together with the water intake opening
The waterway wall narrows the gap between the opposite side wall of the washing and dewatering tub.
The water that rises in the circulation channel
A washing machine characterized by forming a raised portion with which a portion contacts .