JPS624157B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a dehydrating washing machine that forcibly circulates washing water.

(b) Prior art This type of dehydrating washing machine is, for example,
It is shown in Japanese Patent No. 131661 and includes a pump chamber for circulating washing water and a discharge waterway connected to the pump chamber. The pump chamber is located in the lower part of the circular wing seat, and the discharge waterway communicates with a part of the wing seat that is missing. When the back blade of the rotor blade acts as a centrifugal pump, water is sucked into the pump chamber, flows along the circumferential wall of the blade seat, and is sent out to the discharge channel. At this time, the water flowing along the circumferential wall is subjected to a force so that it flows in the circumferential direction, and is divided into water that flows into the discharge channel and water that circulates. The orbiting material returns to the tank through the gap between the circumferential wall of the blade seat and the outer circumferential edge of the rotor blade due to centrifugal force, and immediately exits the dehydration tank on the surface of the rotor blade and is sucked into the pump chamber again. will be included. If the washing water is circulated in a short-circuit manner for a short period of time in this way, if it contains detergent, it may be stirred by the back blade and cause abnormal foaming. In addition, since the amount of water discharged is reduced by the amount of circulation, the water flow change and lint capture functions are degraded.

(c) Problems to be solved by the invention The present invention reduces the amount of water that directly returns to the tank,
This is intended to suppress abnormal foaming phenomena.

(d) Means for Solving the Problems The present invention provides an opening in a substantially annular rib constituting a pump chamber, which serves as a discharge port to a discharge waterway, and a straight line extending from both sides of the opening into the opening. The problem is solved by providing continuous straight sections.

(E) Effect: In other words, the water flowing along the ribs has less force to circulate in the straight portion, so it is directly sent out from the open portion to the discharge channel, and is difficult to return from the outer periphery of the rotor blade into the tank. Therefore, most of the water sucked into the pump chamber is sent out to the discharge waterway to perform a predetermined action, and the abnormal bubbling phenomenon that occurs as a result of short circuit circulation of water is reduced.

(f) Example To explain based on the drawings, 1 is an outer tank of a fully automatic washing machine suspended from the machine frame, a synthetic resin washing/drying tank 2 is installed inside, and a bearing case 3 and a motor 4 are installed. It is attached externally. As shown in Fig. 2, the dehydration tank 2 has a substantially hexagonal column shape consisting of an arcuate wall and a flat wall, and has a plurality of raised portions on the bottom and the corners extending from the bottom to the circumferential side to improve the cleaning effect. 5
..., and an opening 6 is formed at the center of the bottom. A rotary blade 7 is disposed within the opening 6 with a slight gap, and is attached to the rotor shaft 8, and has a plurality of back blades 9 formed on its back surface. 10... is a large number of dehydration holes formed on the peripheral side wall of the dehydration tank 2, 1
1... are reinforcing ribs formed vertically and horizontally on the outer surface of the peripheral side wall of the dehydration tank 2, 12... are reinforcing radial ribs formed on the outer bottom surface of the dehydration tank 2, and 13... are also on the outer bottom surface. Concentric reinforcing ribs formed, 14
is a boss formed on the third concentric rib 13 from the inside.

Reference numeral 15 denotes a dehydration tank board fixed to the dehydration tank drive shaft 16 by bolts 17 and nuts 18, which abuts the innermost rib 19 of the concentric ribs 13 and the boss 14, and screws 20 are tightened to the boss 14. It is connected to the dehydration tank 2 by. The substrate 15 and the ribs 19 constitute a pump chamber 21 by the back blade 9, and water between the outer tank 1 and the dehydration tank 2 is sucked through the plurality of through holes 22 of the substrate 15.

Here, the rib 19 is not completely annular;
As shown in FIG. 2, it has an open part 23 that opens toward the corner where the raised part 5 is located, and the arcuate wall leading to this open part 23 is shaped like a "C" and has a straight part 24,
24 is provided, and furthermore, an expanded portion 25 that expands outward from the straight portions 24, 24 is provided. The open portion 23 becomes a discharge port of the pump chamber 21. Also,
The expanded portion 25 is located on the outer bottom surface of the dehydration tank 2, and its outer side is connected to an open corner portion 26. This corner part 26 is a water channel cover 27
The open surface is closed, and a discharge waterway 28 is formed which communicates with the pump chamber 21 through the expanded portion 25 . Further, this corner portion 26 is used as a passage for die cutting when the expanded portion 25 is integrally molded with the raised portion 5 by the side core.

The water channel cover 27 has a shape as shown in FIG. 3, and its upper end flange portion 29 comes into contact with the lowermost horizontal rib 30 of the vertical and horizontal reinforcing ribs 11.
Therefore, as shown in Figure 2, screws 31 and 31 are installed at both ends.
be stopped.

In this way, the discharge waterway 28 is formed into a square tube shape with great strength without missing the circular shape of the opening 8, and the raised portion 5 further increases the waterway area.

Reference numeral 32 denotes a vertical groove formed in the circumferential side wall of the dewatering tank 2 corresponding to the corner portion 26, and its lower end opening communicates with the upper end of the corner portion 26 of the discharge waterway 28. Reference numeral 33 denotes a discharge pipe that is fitted into the vertical groove 32 in a substantially tight manner, and whose cross section is made into a substantially oblong shape by blow molding, for example, and whose lower end opening is fitted into the lower end opening of the vertical groove 32, that is, the upper end of the discharge waterway 28. The upper end of the balance ring 34 of the dehydration tank 2 is inserted into a retaining ring 35 located toward the inside of the tank. This discharge pipe 33 has a bent part 36 that is gently bent inward from the middle lower part fitted in the vertical groove 32 to the upper part inserted into the retaining ring 35 closer to the inside of the tank.
This bent portion 36 partially protrudes into the tank to create a washing plate effect and reduce resistance to discharge pressure.

Reference numeral 37 denotes a cover fixed to the upper surface of the balance ring 34 by a screw 38, and has a hanging piece 39. The hanging piece 39 presses the upper end opening of the discharge pipe 33, and the lower end opening of the discharge pipe 33 is connected to the discharge waterway 28. Prevents it from coming off. A passage 40 communicates with the upper end opening of the discharge pipe 33, is formed by the retaining ring 35 and the cover 37, and has a downward outlet 41 facing into the dehydration tank 2.

42 is a lint filter detachably attached to the balance ring 34, and a conical net 43
and a synthetic resin mounting frame 44, which receives water discharged from the downward outlet 41 from below, collects lint, etc. from the water, and returns the water into the tank.

Reference numeral 45 denotes a rib formed on the outer periphery of the rotary blade 7 so as to hang down by the dimension A, which increases the pressure within the pump chamber 21 during rotation and reduces the amount of water flowing into the tank through the gap between the openings 6. 46 is an outer tank cover attached to the upper end of the outer tank 1.

To explain the operation, first, when the rotary blade 7 rotates during washing or rinsing, the water between the outer tank 1 and the dehydration tank 2 flows through the through hole 22 as shown by the arrow in Fig. 1 due to the pump action of the back blade 9. It is sucked into the pump chamber 21.
Most of the sucked water is quickly sent out along the straight parts 24, 24 to the open part 23, no matter which way the rotor blade 7 rotates, and from there to the discharge channel 28.
The water is fed into the dewatering tank 2 through the discharge pipe 33 and the passage 40, and is discharged from the downward outlet 41 through the lint filter 42 into the dehydration tank 2.

Therefore, very little water comes out into the tank from the gap between the opening 6 and the rotary blade 7, and this water immediately comes out of the dewatering hole 10, is sucked into the pump chamber 21 again, and is sucked into the pump chamber 21 again by the blades 9. The phenomenon of abnormal foaming due to agitation is becoming less likely to occur. That is, since the short-circuit path of water in a short period of time is small, abnormal foaming is less likely to occur. In addition, the washing water flow is controlled by the rotary blade 7.
As the water from the downward outlet 41 overlaps perpendicularly to the water flow from the downward outlet 41, the situation becomes complicated.In particular, the discharged water does not spread over the entire area of the tank, but concentrates almost directly below, causing the laundry to fall and not float to the surface. Since it works by hitting the laundry and submerging it under the water surface, it promotes changing the top and bottom of the laundry and improves the washing rate and rinsing effect. Furthermore, the lint filter 42 can reliably remove lint and the like contained in the washing water. At this time, as shown in the figure, if the tip of the net 43 is submerged by the dimension B below the washing water surface L (at a high water level), the laundry will hit the net 43, and the vibrations at this time will remove the thread waste caught on the net 43. Thread waste can be easily removed from the net 43 when cleaning the filter 42 by pushing it to the tip.

The discharge waterway such as the discharge pipe 33 is clogged with thread waste, etc.
When the amount of water from the downward outlet 41 decreases,
It is necessary to clean the discharge channel. In this case, by removing the cover 37 on the top surface of the balance ring 34, the discharge pipe 33 can be lifted up and the discharge waterway 28 and the retaining ring 35 can be removed.
It can be removed from the discharge pipe 33 and passage 4.
0 can be cleaned easily, improving serviceability. Further, since the discharge waterway 28 is formed on the outer bottom surface of the dehydration tank 2, the waterway 28 does not appear inside the dehydration tank 2, which is good in appearance. Furthermore, since the discharge waterway of the pump chamber 21 on the side wall of the dehydration tank 2 is constituted by the discharge pipe 33, lint and the like do not appear from this part and do not spoil the external design.

The amount of water discharged from the discharge waterway 28 is large because the raised portion 5 increases the area of the waterway, and the increase in the amount of discharge increases the amount of lint captured and the effect of complicating the water flow. The laundry moving around due to the washing water flow is prevented from rising by the inwardly protruding bent portion 36 of the discharge pipe 33, and the laundry can be easily changed from top to bottom here. Therefore, cleaning power is improved and uneven washing is reduced.

During dewatering, the discharge pipe 33 is pressed by the laundry under centrifugal force and tends to deform, but the vertical grooves 32 support this and suppress the deformation. Therefore, the strength of the discharge pipe 33 itself may be set to be low, which is advantageous in manufacturing, and the laundry is less likely to be caught during deformation and return.

(G) Effects of the Invention According to the present invention, since most of the water is sent from the pump chamber to the discharge channel, it is possible to achieve the desired effect and reduce abnormal bubbling caused by short-circuited circulating water.
It is possible to provide a high-performance washing machine.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a dehydrating washing machine according to the present invention;
FIG. 2 is a sectional view taken along the line in FIG. 1, and FIG. 3 is a perspective view of the water channel cover. 1...Outer tank, 2...Washing/dehydration tank, 6...Opening, 7...Rotary blade, 9...Back blade, 15...Dehydration tank substrate (substrate), 19...Concentric ribs (ribs) ,2
1... pump chamber, 23... open section, 24... linear section, 28... discharge waterway.

Claims (1)

[Claims] 1. A rotary blade is arranged in the opening at the bottom of the washing/dehydration tank installed in the outer tank, and on the back side of the rotor blade, there is a substantially annular rib that is integrally hung from the dehydration tank and the opening end surface of this rib is installed. The fixed substrate forms a pump chamber in which the water between the dehydration tank and the outer tank is sucked by the back blade of the rotary blade, and the rib is formed with an opening that serves as a discharge port to the discharge waterway. In addition, the dehydrating washing machine is provided with a linear part that extends linearly from both sides of the open part.