JP7170179B2 - washing machine - Google Patents

Description

The present invention relates to a washing machine for washing clothes using a liquid detergent or a liquid finishing agent.

Conventionally, in this type of washing machine, there has been proposed a configuration of a loading device that automatically loads liquid detergent and liquid finishing agent (softening agent) during the operation process (see, for example, Patent Document 1).

FIG. 6 is a vertical cross-sectional view of a conventional washing machine described in Patent Document 1, FIG. 7 is a cross-sectional view of a detergent loading device of the washing machine, and FIG. 8 is a main portion of a detergent container portion of the washing machine. FIG. 9 is a cross-sectional view of FIG. 9 showing the mold configuration of the main part of the detergent container portion of the washing machine.

6, 7 and 8, a detergent input device 10 connected to a water supply valve 7 and containing powdered synthetic detergent, liquid detergent and liquid finishing agent is arranged in the upper part of the housing 2. As shown in FIG. The detergent injection device 10 is connected to the water tank 3 by a water supply hose 11 formed of a bellows rubber body.

The detergent input device 10 includes a detergent input frame 40 having an upper opening and a substantially U-shaped cross section with a bottom, a detergent container 20 for containing the detergent, and a detergent container connected to the water supply valve 7 . 20 and a water supply member 30 provided with a water supply passage 31 for supplying water to 20 .

Under the water supply member 30, a detergent input portion frame 40 is disposed, and the detergent storage container 20 is accommodated in a space 40a formed between the water supply member 30 and the detergent storage container 20 in such a manner that the detergent storage container 20 can be taken out from above. there is A water supply hose 11 is connected to the water tub 3 at the rear bottom of the detergent input frame 40 .

In addition, the detergent storage container 20 is housed in a space 40a surrounded by the detergent loading section frame 40 and the water supply member 30 in a state that it can be taken out from above. The water supply member 30 includes a water supply channel 31 serving as a channel for water to be supplied to the detergent container 20, and a water inlet 33 formed with a large number of small holes on the bottom surface of the water supply channel 31.

The water supplied from the water inlet 33 is mixed with the detergent (powder synthetic detergent, liquid detergent, liquid finishing agent, etc.) contained in the detergent container 20 to produce various detergent mixtures. Further, the detergent loading section frame 40 has a detergent liquid supply path 41 integrally formed at its bottom. Various detergent mixed liquids are supplied into the water tub 3 via the detergent liquid supply path 41 and the water supply hose 11 connected to the detergent liquid supply path 41 .

The detergent housing container 20 is housed in the detergent loading section frame 40 in such a manner that it can be taken out from above. 23 and a liquid finishing agent container (liquid containing portion) 24 for containing the liquid finishing agent.

A powder detergent input path 22 a is formed on the downstream side of the powder detergent storage section 22 . A liquid detergent input path 23a is formed in the downstream outer bottom portion of the liquid detergent storage portion 23 . A liquid finishing agent introduction path (liquid introduction path) 24 a is formed on the downstream side of the outer bottom portion of the liquid finishing agent storage section 24 . The detergent contained in the powder detergent containing portion 22, the liquid detergent containing portion 23, and the liquid finishing agent containing portion 24 are all diluted with water supplied from the water supply valve 7, and the detergent liquid is supplied from the space portion 40a. It is configured to flow into the passage 41 .

A container cover plate 25 is detachably provided on the upper portion of the liquid finishing agent container 24 to partially or wholly cover the liquid finishing agent container 24 . At the bottom of the liquid finishing agent container 24, a substantially cylindrical second conduit 26 is erected upward. A lower end portion 26a of the second conducting path 26 opens outward from the bottom, and an upper end portion 26b opens upward. An upper end portion 26b of the second conductive path 26 is connected to one end 27a of a conductive path coupling portion 27 formed in an inverted U shape.

Inside the liquid finishing agent container 24, a first conducting path 28 formed substantially in parallel with the second conducting path 26 and having a substantially cylindrical shape is provided. A lower end portion 28 a of the first conduit 28 opens near the bottom portion of the liquid finishing agent storage portion 24 . The upper end portion 28b of the first conducting path 28 is connected to the other end 27b of the conducting path coupling portion 27 which is connected to the upper end portion of the first conducting path and formed in an inverted U shape. ing.

In this manner, the liquid finishing agent input passage 24a is formed into a substantially U-shaped substantially cylindrical shape by the first conducting passage 28, the conducting passage connecting portion 27, and the second conducting passage 26, and the liquid finishing agent accommodating portion 24 is formed. It rises from the vicinity of the bottom, descends downward, and is connected to the outside of the bottom by a single path.

In the above configuration, an appropriate amount of liquid finishing agent is put into the liquid finishing agent container 24 before starting washing, and in the final rinsing process, the liquid finishing agent is supplied from the second water supply passage 31b. Water is supplied to the liquid finishing agent container 24 . The supplied water is partially or wholly mixed with the liquid finishing agent to form dilution water. The water supply raises the level of the dilution water in the liquid finishing agent container 24 and draws up the dilution water into the first conduit 28 . As the supply of water further progresses, the diluting water crosses the conducting path connecting portion 27, and the diluting water begins to flow into the second conducting path 26, and from its lower end portion 26a, it flows down below the liquid finishing agent storage portion 24 and siphons. action begins.
When the siphon operation is started, the diluting water in the liquid finishing agent container 24 continues to flow out even after the water supply is finished. When no more dilution water is sucked into the liquid finish container 24, air enters the second conduit 26 and the conduit joint 27 and the siphoning is terminated.

JP 2017-74284 A

However, in general, as shown in FIG. 9, as a mold configuration at the vertex of the first conduction path 28, a mold dividing portion 43 is provided at the vertex for degassing during molding. An upward convex burr 42 and a step are generated at the vertex. When the burr 42 or the step is generated, the liquid tends to separate from the wall surface of the first conduction path 28 (siphon passage) around the burr 42 or the step, so that the siphon phenomenon does not occur well and the liquid does not flow smoothly. I had a problem.

The present disclosure provides a washing machine that suppresses malfunction due to siphon phenomenon and exhibits predetermined cleaning performance and softener effect.

In order to solve the above conventional problems, the washing machine of the present invention includes an outer frame, an outer tub suspended and vibration-proof supported in the outer frame, a washing tub rotatably contained in the outer tub, an upper frame disposed on the upper portion of the outer frame; a case for containing a liquid detergent or softener disposed at a position facing the washing tub at the rear of the upper frame; a water pouring device for pouring water into the case in a state where the water is poured into the case; a liquid agent introduction unit provided in the case and having a substantially cylindrical space formed in communication with the lower surface of the inner bottom of the case; a cap that covers the upper part and the surroundings with a gap provided therebetween, and is composed of a siphon inlet part formed in the inner bottom part of the case, the gap, and the space part in a state in which the cap covers the liquid agent introduction part. and a liquid detergent or softener is introduced into the washing tub by a siphon phenomenon through an outlet provided downstream of the space of the liquid agent introduction portion, and the liquid agent introduction portion is located inside the case. Between the apex of the siphon wall surface forming the gap along which the liquid detergent or softener flows upward and the upper corner R forming the gap, a mold dividing part of the cavity mold during molding is provided. As a result, a burr is formed, and the burr protrudes upward .

The washing machine of the present invention suppresses the malfunction of the siphon phenomenon and exerts predetermined washing performance and softening effect.

FIG. 1 is a vertical cross-sectional view of a washing machine according to a first embodiment of the present invention; An exploded perspective view of the detergent input device of the washing machine. Longitudinal sectional view seen from the front of the detergent input device of the washing machine Principal part cross-sectional view and perspective view of the detergent input device of the washing machine FIG. 10 is a perspective view of a principal part of a detergent dispenser for a washing machine according to a second embodiment of the present invention, and FIG. Longitudinal sectional view of a conventional washing machine Cross-sectional view of the washing machine detergent input device Cross-sectional view of the main part of the detergent storage container part of the washing machine A diagram showing the mold configuration of the main part of the detergent storage container part of the washing machine

Hereinafter, embodiments of the invention will be described with reference to the drawings. It should be noted that the present invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a washing machine according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a detergent loading device of the washing machine, and FIG. 3 is a front view of the detergent loading device of the washing machine. FIG. 4 is a vertical cross-sectional view and FIG. 4 is a cross-sectional view and a perspective view of the main part of the detergent dispenser of the same washing machine.

In FIGS. 1 to 4, the outer frame 51 has an upper frame 52 arranged on the upper part, an outer tub 55 which rotatably encloses a washing tub 53 and whose upper part is covered with a cover 54, inside the outer frame 51. Hanging vibration isolation support is provided from the upper corners.

The washing tub 53 has a plurality of small holes (not shown). A large open slot 52a is formed in the center of the upper frame 52, and a lid 56 is provided so as to openably cover the slot 52a.

A pulsator 82 for stirring clothes is rotatably disposed at the inner bottom of the washing tub 53, and a motor (not shown) provided at the outer bottom of the outer tub 55 rotates the pulsator 82 and the washing tub 53. do.

In the rear part of the upper frame 52, at a position facing the washing tub 53, there is housed a liquid injection device 50 that is largely composed of a water injection device 62 and a case 57 that can be pulled out and housed in the water injection device 62. ing.

The case 57 has a liquid detergent box 59 into which the liquid detergent is put and a softener box 60 into which the liquid softener is put. A space 61 is provided between the liquid detergent box 59 and the softener box 60. there is

The water injection device 62 drops the tap water supplied via the water supply path 65 into the case 57 through a water injection port (not shown) and pours the water into the washing tub 53 through the discharge port 63 . The water supply path 65 is connected to a multi-valve water supply valve (not shown) capable of opening and closing two or more water channels so that the liquid detergent box 59 and the softener box 60 in the case 57 can be separately supplied with water. As will be described later, the liquid detergent and softener are introduced into the washing tub 53 by a siphon phenomenon.

The case 57 is provided with a substantially cylindrical liquid agent introduction portion 66a that communicates with the lower surface of the inner bottom of the case of the liquid detergent box 59 and a substantially cylindrical liquid agent introduction portion 66b that communicates with the lower surface of the inner bottom of the case of the softener box 60. ing.

The liquid agent introduction portion 66a and the liquid agent introduction portion 66b are formed by a siphon passage guide wall 71a and a siphon passage guide wall 71b surrounding three directions, a space portion 69a, and a space portion 69b, respectively. , 67b. The guide wall slat fitting portion 72a and the guide wall slat fitting portion 72b of the cap 67a and the cap 67b are fitted to the siphon passage guide wall 71a and the siphon passage guide wall 71b respectively. The side without the siphon passage guide wall 71b and the upper portion are covered with a predetermined gap. The predetermined gap and the space portions 69a and 69b form respective siphon passages from the siphon inlet portions 70a and 70b of the liquid agent introduction portions 66a and 66b.

At corners R on the upstream side of the liquid in the siphon passage near the vertices of the liquid agent introduction portions 66a and 66b, mold division portions 86a and 86b are formed for degassing during molding. There is a burr 85 that is inevitable in molding.

The mold dividing portion 86a and the mold dividing portion 86b of the liquid agent introduction portion 66a and the liquid agent introduction portion 66b, respectively, are provided for gas venting so that the apex portion of the siphon wall surface 88a and the siphon wall surface 88b does not burn due to the gas. It is a split surface obtained by splitting the cavity mold into two parts and rubbing them together.

The burr 85 has a height of 0.2 mm or less due to the accuracy improvement and maintenance of the mold, and the surface and surroundings of the burr 85 are washed with a neutral detergent containing sodium alkylbenzenesulfonate as a main component. The water-repellent substance (not shown) attached to the surface of the burr 85 and its surroundings, which is generated by the high temperature and high pressure of the gas generated from the resin at the time of molding, is removed.

In the above configuration, when using the liquid detergent and the softener, the case 57 is pulled out, the liquid detergent is put into the liquid detergent box 59, the softener is put into the softener box 60, and stored in the water injection device 62.

When tap water is supplied from the water supply path 65 in this state, the supplied water is poured into the liquid detergent box 59, diluting the liquid detergent in the liquid detergent box 59 and filling the inside with the cleaning liquid.

When the water level in the liquid detergent box 59 rises, the cleaning liquid enters the gap between the liquid agent introduction portion 66a and the cap 67a. It flows into the inside of the pipe 66a and flows out of the liquid detergent box 59 from the inner bottom (not shown) of the liquid detergent box. At this time, the cleaning liquid sweeps away the air remaining in the space near the upper end of the liquid detergent inlet 66a toward the inner bottom (not shown) of the liquid detergent box.

The gap between the liquid agent introduction portion 66a and the cap 67a, the vicinity of the upper end of the liquid agent introduction portion 66a, and the air inside the pipe of the liquid agent introduction portion 66a are all washed away. 4 flows out with increasing momentum in the direction of the liquid flow A indicated by the solid line arrow 4, and the siphoning action is started.

Even after the water supply from the water supply path 65 is stopped, the siphon operation is continued, and the cleaning liquid inside the liquid detergent box 59 is discharged, so that the liquid detergent is injected into the washing tub 53 together with the liquid detergent through the discharge port 63. When the water level in the detergent box 59 drops below the siphon inlet, air enters the siphon passage and the siphon operation ends.

The softener is also supplied to the washing tub 53 through the discharge port 63 from the outlet 87b with the same effect as the liquid detergent.

However, if there are burrs, steps, or a water-repellent substance adhering to the siphon passage, the liquid may leave the siphon wall surface 88a and the siphon wall surface 88b starting from this portion.

If there is a sufficient amount of water supply and a large amount of liquid flows in the siphon passage, the liquid that has left the siphon wall surface 88a and the siphon wall surface 88b will come into contact with the wall surface again downstream, and the liquid will fills the aisle, the siphon starts.

However, when the amount of water supply is small, when there is a large burr or step, and when the water repellency is high due to the adherence of a water repellent substance, the state where the liquid is separated from the siphon wall surface 88a and the siphon wall surface 88b is up to the siphon outlet. It's going to be a row. As a result, air enters the siphon passage from the outflow port 87a and the outflow port 87b of the siphon outlet, the siphon phenomenon does not occur correctly, and the liquid remains in the case.

When the liquid surface of the flowing liquid separates from the siphon wall surface and the siphon does not start normally, the liquid in the passage from the top of the siphon downward, that is, toward the outlet 87a and the outlet 87b of the siphon outlet. The flow becomes a free fall, the flow velocity increases as it approaches the siphon outlet, and the cross-sectional area perpendicular to the flow direction decreases. That is, the flow becomes narrower as it goes downstream, and since it is further separated from the siphon wall surface 88a and the siphon wall surface 88b, the liquid once separated from the siphon wall surface near the siphon apex is unlikely to come into contact with the siphon wall surface again.

Therefore, even a small burr, step, or even a slight water-repellent substance can cause the siphon to malfunction.

Essentially, a mold structure that causes burrs and steps in the siphon passage should be avoided, but for maintenance of the mold and countermeasures against gas burns of parts, burrs and steps above the siphon passage should be avoided. There are many things that have to be done.

For this reason, as described above, it is important to set the height of the burr 85 and manage it by improving the accuracy of the mold and performing maintenance.

In the above description, the liquid detergent box 59 into which the liquid detergent is introduced has been mainly described, but the softener box 60 into which the softener is introduced can be configured in the same manner so that the softener and its solution always remain. You can put in the right amount at the right time.

As described above, in the present embodiment, in the mold for forming the siphon wall surface 88a and the siphon wall surface 88b along which the liquid detergent or softener of the liquid agent input portion 66a and the liquid agent input portion 66b flows, the liquid detergent is directed upward. Alternatively, a mold dividing portion 86a and a mold dividing portion 86b of the cavity mold are provided at the upper corner R portions of the siphon wall surface 88a and the siphon wall surface 88b through which the softener flows. As a result, the upper side of the burr 85 gets wet with the liquid detergent or softener that has fallen by its own weight, so that the entire periphery of the burr 85 is filled with the liquid detergent or softener, and the siphon phenomenon is performed normally. It is possible to prevent the liquid detergent or softener in 57 from being discharged from the liquid material introduction part 66a or the liquid material introduction part 66b or the liquid detergent or softener from remaining in the case 57, thereby achieving a predetermined washing performance and softening effect. can be demonstrated.

By setting the height of the burr generated at the mold dividing portion of the siphon wall surface 88a and the siphon wall surface 88b to be 0.2 mm or less, the siphon phenomenon is normally performed, and the liquid detergent or softener in the case 57 is liquid. It is possible to prevent the liquid detergent or the softener from not being discharged from the input portion 66a or the liquid agent input portion 66b, or from remaining in the case, so that the predetermined cleaning performance and softening effect can be exhibited.

Further, by configuring the siphon wall surface 88a and the siphon wall surface 88b to be cleaned with a cleaning agent containing alkylbenzene sulfonate, the siphon phenomenon is performed normally, and the liquid detergent or softener in the case 57 is discharged from the liquid agent input portion. It is possible to prevent the liquid detergent or the softener from not being discharged or remaining in the case, thereby exhibiting the predetermined cleaning performance and softening effect.

(Embodiment 2)
FIG. 5 is a perspective view of a principal part of a detergent dispenser for a washing machine according to a second embodiment of the present invention, and a view from arrow B. FIG. It is the same as the first embodiment except for the mold division structure of the cavity mold of the liquid material injection part, and the same parts are denoted by the same reference numerals, and description thereof is omitted.

In FIG. 5, a mold dividing portion 96a and a mold dividing portion 96b of respective cavity molds forming the liquid agent introduction portion 66a and the liquid agent introduction portion 66b are divided into the vicinity of the siphon inlet portion 70a and the siphon inlet portion 70b and the siphon passage guide. The ribs of the wall 71a and the siphon passage guide wall 71b are provided substantially at the center.

As a result, the siphon wall surface 88a and the siphon wall surface 88b become smooth surfaces and do not affect the operation of the siphon phenomenon. Moreover, even if burrs occur on the ribs of the siphon passage guide wall 71a and the siphon passage guide wall 71b, the siphon phenomenon is not affected.

As described above, according to the present embodiment, in the mold for forming the liquid agent introduction portion 66a and the liquid agent introduction portion 66b, the vicinity of the siphon inlet portion 70a and the siphon inlet portion 70b and the siphon passage guide wall 71a and the siphon passage guide wall 71b By providing the mold division part 96a and the mold division part 96b of the cavity mold on the line connecting the approximate center of the rib of the case 57, the siphon phenomenon is normally performed, and the liquid detergent or softener in the case 57 is dispensed. It is possible to prevent the liquid detergent or softener from not being discharged from the liquid agent inlets 66a and 66b, or from remaining in the case 57, thereby achieving the desired cleaning performance and softener effect.

The present disclosure is applicable to washing machines with a siphon mechanism. Specifically, the present disclosure is applicable to vertical washing machines, drum washing machines, twin-tub washing machines, and the like.

50 liquid injection device 51 outer frame 52 upper frame 53 washing tub 55 outer tub 57 case 62 water injection device 66a, 66b liquid injection parts 67a, 67b caps 70a, 70b siphon inlets 71a, 71b siphon passage guide walls 85 burrs 86a, 86b Mold dividing parts 87a, 87b Outflow ports 88a, 88b Siphon wall surfaces 96a, 96b Mold dividing parts

Claims (4)

an outer frame;
an outer tank suspended and vibration-proof supported in the outer frame;
a washing tub rotatably contained in the outer tub;
an upper frame body disposed on the upper part of the outer frame;
a case for containing a liquid detergent or softener, which is housed at a position facing the washing tub in the rear portion of the upper frame;
and a water injection device for injecting water into the case while the case is retractably stored;
a liquid agent introduction part provided in the case and having a substantially cylindrical space formed in communication with the lower surface of the inner bottom of the case;
a cap that covers the upper part and the periphery of the liquid agent introduction part with a gap therebetween ;
In a state in which the cap covers the liquid agent introduction portion, the siphon inlet portion formed in the inner bottom portion of the case, the gap, and the space portion are configured to siphon the liquid detergent or softener into the liquid agent introduction portion. It is configured to be thrown into the washing tub through an outlet provided downstream of the space ,
The liquid agent introduction part is located between the apex portion of the siphon wall surface forming the gap along which the liquid detergent or softener in the case flows upward and the upper corner R portion forming the gap , at the time of molding. A washing machine in which burrs are formed by providing a mold dividing portion of a cavity mold, and the burrs protrude upward . 2. The washing machine according to claim 1, wherein the height of said burr is 0.2 mm or less. The washing machine according to claim 1 or 2, wherein the siphon wall surface is cleaned with a cleaning agent containing an alkylbenzenesulfonate. The liquid injection part is arranged on a line connecting the vicinity of the siphon inlet part and the approximate central part of the rib of the siphon passage guide wall formed at both ends of the siphon wall surface to form the gap. 4. The washing machine according to claim 2 or 3, wherein a part is provided.

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