JPH08332296A - Washing machine - Google Patents

Abstract

PURPOSE: To spray a large quantity of a washing liquid even at the time of a low water level by providing a spraying passage connected to a water guide path delivered from the back vane of a bottom rotor and having a spray port spraying the washing liquid and a water passage connecting the inside of a washing tub to the back vane at part of the balancer of the washing tub. CONSTITUTION: A water passage 29 is formed in the gap between the inner wall and bottom face of a washing tub 6B when a lower balancer 14 is inserted into the inner bottom section of the washing tub 6B, a washing liquid is directly guided from the inside of the washing tub 6B when the pump of a back vane 12 is operated, and the washing liquid is fed to the center section of the back vane 12 via the lower side of a bottom wall 30. The inlet width of a water guide path 13 is largely opened toward the outlet of the back vane 12, and a spray port 9 spraying the washing liquid to the laundry washed at a low water level is provided above. The washing liquid can be also sucked from the water passage 29 formed between the projections provided near the outer periphery and bottom of the lower balancer 14 and the inner wall of the washing tub 6B, and the necessary and sufficient washing liquid can be fed in response to the pumping capability of the back vane 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine in which a back wing of a rotary wing provided at the bottom of a washing tub pumps up a washing liquid and sprinkles it on a laundry.

[0002]

2. Description of the Related Art As a conventional technique of this kind, Japanese Patent Publication No. 7-4
As shown in Japanese Patent No. 466, the washing liquid is supplied to the back blade of the rotary blade from the dehydration hole provided on the wall surface of the washing tub via the outer tub, and the washing liquid sent by the pumping action of the back blade is removed. There is an attempt to improve the cleaning performance by sprinkling water on the laundry through a water spout opening near the upper balancer and by thoroughly spreading the washing liquid over the laundry floating on the surface of the washing liquid to eliminate uneven washing. is there.

[0003]

The above construction is good for washing a relatively large amount of laundry at a high water level,
There is a problem that it is not possible to sufficiently deal with so-called "low water level strong washing", in which a small amount of laundry with strong collar and sleeve dirt is washed at a low water level.

That is, at a low water level, the number of dewatering holes opened in the washing liquid is extremely reduced, so that the number of return holes is reduced from the washing liquid, and the amount of washing liquid that can be supplied to the back blade pump is greatly reduced. Because it does.

Therefore, it is not possible to secure sufficient washing liquid corresponding to the capacity of the back blade pump, and it becomes difficult to deliver the required washing liquid.

An object of the present invention is to solve these problems and to provide a washing machine having a structure capable of stably spraying a large amount of washing liquid onto laundry even in "low water level strong washing". .

[0007]

The features of the present invention include a washing tub for washing and dehydrating laundry, a rotary wing provided at the bottom of the washing tub, and a back provided on the back side of the rotary wing. A blade, a lower balancer that is provided on the inner bottom of the washing tub to reduce shake of the washing tub during dehydration, and a water conduit that is provided in a part of the lower balancer and that receives the washing liquid delivered from the back blade of the rotary blade, A sprinkling passage having a sprinkling port that is connected to the water conduit and sprinkles a washing liquid into the washing tub;
A washing machine comprising: a water passage that is provided near the outer circumference and bottom of the lower balancer and connects the inside of the washing tub with the back blade; and a drive device that rotates the rotary vane and the washing tub. is there.

[0008] It is preferable that the gap formed between the lower balancer and the inner wall and bottom of the washing tub when the lower balancer is inserted into the inner bottom of the washing tub serves as a water passage.

[0009]

[Function] In the case of strong cleaning at a low water level with strong stains on the collar and sleeves, if the washing water level is set to a position lower than the spout of the washing liquid and washing is performed, the back blades integrally formed on the back side of the rotary blade By the pump action, the washing liquid in the washing tub is sucked by the back blade from the dehydration hole opened below the washing liquid surface via the outer tub.

At the same time, since the washing liquid is sucked from the water passage connected to the back blade near the outer periphery and bottom of the lower balancer, sufficient washing liquid required by the back blade pump can be secured.

For this reason, a large amount of washing liquid is sprinkled on the laundry, resulting in early penetration of the washing liquid into the laundry that floats from the water surface, promotion of dissolution of the powder detergent, and "strong washing" at low water level. The synergistic effect significantly improves washing performance.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a vertical sectional view showing a first embodiment of a washing machine according to the present invention.

Reference numeral 1 is a lid which is provided above the laundry inlet 2. 3 is a tap water supply port for washing, to which a hose from a tap (not shown) is connected.

The reference numeral 4 designates a tub cover, which is installed on the outer tub 6A and is made of stainless steel for washing.
It is to prevent it from falling between.

7 is an upper balancer made of synthetic resin,
Fluid is enclosed in a double-partitioned room to reduce the shaking of the washing tub during high-speed dehydration.

Reference numeral 8 is a sprinkling water passage for receiving the washing liquid sent out by the pumping action of the back blade 12 integrally provided on the back side of the rotary blade 11 in the water guiding passage 13 and sprinkling the washing liquid into the washing tub 6B through the sprinkling port 8. .

Denoted at 10 is a dehydration hole provided on the wall surface of the washing tub 6B, and the water separated from the laundry is discharged into the outer tub 6A by the centrifugal force generated by the high-speed rotation of the washing tub 6B during dewatering.

Reference numeral 11A is a main blade provided on the rotary wing 11 and applies mechanical force to the laundry at the time of washing to perform the washing.

Here, the rotary blade 11, the main blade 11A and the back blade 12 are made of synthetic resin and scattered.

Reference numeral 14 denotes a lower balancer, which is an essential part of the present invention. Like the upper balancer 7, the lower balancer is made of synthetic resin as a separate component from the washing tub 6B and is fitted into the bottom of the washing tub 6B.

The chamber inside the lower balancer 14 is divided into two parts, and a fluid is enclosed in each chamber to reduce the vibration of the washing tub 6B due to the balancing action of the fluid during dehydration.

The details of the lower balancer 14 will be described with reference to FIG.

Reference numerals 27 and 28 in the figure denote chambers partitioned by walls, in which liquids such as salt water (not shown) are enclosed.

The room is also provided at the lower part of the water conduit 13 so that the entire circumference is in communication.

Reference numeral 36 denotes a step portion provided on the inner circumference of the lower balancer 14, which constitutes a labyrinth in combination with the step portion 26 provided on the outer circumference of the rotary blade 11 to reduce the leakage of the washing liquid from the same portion.

Reference numeral 29 is a recess provided near the outer peripheral portion and bottom portion of the lower balancer 14, and is also a water passage formed in cooperation with the protrusion 32 and the inner wall and bottom portion of the washing tub 6B shown in FIG.

As described above, the water passage 29 is formed by the gap formed between the inner wall and the bottom surface of the washing tub when the lower balancer 14 is inserted and closely attached to the inner bottom of the washing tub, and It is connected.

Therefore, when the lower balancer 14 is inserted into the bottom portion of the washing tub 6B, only the protrusions 32 provided on the outer peripheral portion and the bottom portion come into contact with the tub wall. It is also advantageous in terms of assembly.

A water passage 29 is formed near the outer circumference and bottom of the lower balancer 14 itself, not at the gap formed between the outer circumference and bottom of the lower balancer 14 and the inner wall and bottom of the washing tub. Is also good.

When the back blade 12 is pumped, the water passage 29 directly introduces the washing liquid from the inside of the washing tub 6B,
The washing liquid is supplied to the central portion of the back blade 12 via the lower side of the bottom wall 30.

Reference numerals 15 and 16 are double output shafts, and the 15 is provided with a screw 31 for attaching the rotary blade 11.

A flange 19 having a suction hole 17 is fixed to the washing tank 6B.

On the other hand, 20 in FIG. 1 is a drive motor fixedly attached to the drive unit base 34.
Power is transmitted to the transmission device 24 via the clutch pulley 23.

The transmission device 24 is a combination of a gear reduction mechanism and a clutch mechanism, and has concentric dual output shafts 15 and 16.
Penetrates the bottom wall of the outer tank 6A in a watertight state and projects into the outer tank 6A.

In the washing process and the rinsing process, the transmission 24 keeps the outer output shaft 16 stationary and rotates the inner output shaft 15 forward and backward, and in the dehydration process, the inner and outer output shafts 15,
Simultaneously rotate 16 at high speed.

A hanging bar 46 hangs down from the upper four corners of the outer frame 5 and is connected to the outer tub 6A via the buffer member 18 at the lower end so that the outer tub 6A is hung in the outer frame 5. To support.

Reference numeral 44 denotes a drain hole, which has an electric valve 45 which opens and closes in response to a command from a control unit (not shown).

FIG. 3 is a view in the direction of the arrow AA in FIG. 2, in which reference numeral 40 denotes a wall surface forming the water channel 8 for sprinkling, and an upper wall surface 41 of the water conduit 13 is integrally molded. .

FIG. 4 shows an elevation view of the water channel 8 for sprinkling.
The inlet width of the water conduit 13 formed by the water conduit side wall 35 has a large opening toward the outlet of the back blade 12, and a water spray port 9 for spraying the washing liquid on the laundry to be washed at a low water level is provided above. The water channel 8 for watering is made of synthetic resin, and is used for the washing tub 6.
It is attached so as to be in close contact with the inner wall of B.

FIG. 5 is a view of the lower balancer 14 as seen from above with the sprinkling canal 8 removed, and in FIG.
A is a wall to which the outside of the side wall 35 of the watering channel 8 is fitted, 33
Is a bottom surface that forms a water conduit in combination with the upper wall surface 41 of the watering channel 8.

As described above, the projection 32 is recessed when the lower balancer 14 is fitted to the bottom of the washing tub 6B.
At 0, a water passage 29 is formed between the washing tub 6B and the inner wall surface.

The projection 32 also projects to the lower part as shown in the sectional view taken along line BB in FIG. 6, and forms a water passage between itself and the bottom of the washing tub 6B. FIG. 8 shows sectional views taken along lines CC and DD of FIG. 5, respectively.

On the other hand, the rooms 27 and 2 of the lower balancer 14
The entire circumferences of the conduits 8 communicate with each other, and the lower part of the water conduit 13 is reduced as shown in FIG.

The drainage port 4 opening to the bottom wall of the outer tank 6A in FIG.
4 is connected to a drain hose 48 via a drain valve 45, and constitutes a drain system of the washing machine.

The transmission of power to the dual output shafts 15 and 16 is switched by the clutch in the transmission 24, and the operation of the clutch mechanism is performed by the solenoid coil 47.

A control device for controlling the drive motor 20, the drain valve 45, and the solenoid coil 47 will not be shown or described.

25 is an outer frame 5 for supporting the entire washing machine.
It is a leg part provided in.

In the above construction, when carrying out a small amount of laundry with strong stains on the collar and sleeves, when laundry and detergent are put in and the "collar and sleeve washing course" of the washing machine is selected and started, not shown. Water is supplied from the water supply port 3 according to a command from the control device, and the water level is set at a position lower than the water sprinkling port 9 of the water channel 8 for spraying.

At the same time, the drive motor 20 rotates and its power is transmitted to the rotary blade 11 via the transmission device 24.

The rotary blades 11 rotate and the main blades 11A give a mechanical force to the laundry to carry out "strong washing" of washing in a low water level.

At this time, the back blade 12 integrally provided on the back side of the rotary blade 11 is also rotated at the same time, passing through the dehydration hole 10 on the wall surface of the washing tub 6B and passing between the outer tub 6A and the washing tub 6B. It is sucked through the suction hole 17 and acts as a pump.

Since the inlet of the water conduit 13 facing the outlet of the back blade 12 is greatly expanded, a large amount of water can be pumped, and the washing liquid is sprayed on the laundry from the sprinkler 9 via the sprinkling canal 8. .

However, in this case, since the water level is set low, the number of dehydration holes 10 opened below the washing liquid surface is extremely small. Therefore, the dehydration holes 10 alone correspond to the pumping capacity of the back blade 12. The washing liquid cannot be supplied sufficiently.

In order to solve this problem, the dehydration hole 1
Although the number of 0s should be increased, the strength of the washing tub 6B decreases,
There is a restriction that the number of dehydration holes 10 cannot be increased unnecessarily. In the present invention, the washing liquid can be sucked also from the water passage 29 formed between the projection 32 provided in the outer periphery of the bottom balancer 14 and in the vicinity of the bottom and the inner wall of the washing tub 6B. It becomes possible to supply a necessary and sufficient washing liquid according to the pumping capacity.

As a result, a large amount of washing liquid can be sprinkled on the laundry during washing, and the large amount of this washing liquid promotes the dissolution of the powder detergent, and the laundry is floated from the liquid surface to the laundry. The early penetration of the washing liquid is possible, and the synergistic effect with the so-called “strong washing” of so-called scrubbing at low water level greatly improves the washing performance.

Further, as a second embodiment, as shown in FIG. 9, since the washing liquid can be directly supplied to the back blade 12 from the inside of the washing tub 6B, a plurality of water guiding paths and sprinkling paths are provided to wash a larger amount of laundry. It is possible to spray and circulate the liquid from multiple places on the laundry.

The cross sections of B-B, C-C, and D-D shown in FIG. 9 are exactly the same as those of the first embodiment, and their shapes correspond to those of FIGS. 6, 7, and 8, respectively.

Furthermore, in addition to those of the first and second embodiments as the third embodiment, an upper balancer 7 as shown in FIG.
A separate water channel 8A for collecting lint in which the water level is set high such as in the vicinity is provided, and the frame 37 of the net 49 is inserted into the groove 38 of the sprinkling port 39, and the water channel 8A Receives the washing liquid flowing into the washing tub 6B through the water outlet 39,
It collects lint in the same liquid.

Here, 35A, 40A and 41A respectively correspond to the wall surface of the water conduit, the wall forming the water conduit 8A, the wall on the upper surface of the water conduit, etc., as in the first embodiment.

FIG. 11 further shows a fourth embodiment, in which a small protrusion 42 for preventing foreign matter from flowing into the inlet of the water passage 29.
Is provided, and 43 in the drawing is a small protrusion 42.
Is a suction port formed by.

FIG. 12 is a sectional view of the portion provided with the small protrusion 42 as seen from the line EE.

Further, as a fifth embodiment, the upper balancer 7 having substantially the same height as the discharge port 39 of the waste water collecting channel 8A.
A water channel having an opening through which water can be sprinkled from the vicinity is also provided, and the washing liquid may be sprinkled on the laundry even when washing is performed at a normal high water level or lower.

[0064]

Since the washing liquid is supplied directly from the inside of the washing tub to the back blade of the rotary blade, a large amount of washing liquid can be sprayed on the laundry regardless of the strength of the tub. For this reason, the effects of promoting the dissolution of the powder detergent, precipitating the washing liquid into the laundry, and the like become large, and the washing performance can be greatly improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a first embodiment of a washing machine according to the present invention.

FIG. 2 is an enlarged vertical sectional view showing a main part of the washing machine shown in FIG.

FIG. 3 is a view on arrow AA of the drawing shown in FIG.

FIG. 4 is an elevational view showing a watering channel of the washing machine shown in FIG. 1.

FIG. 5 is a more detailed explanatory view of the drawing shown in FIG.

6 is a vertical cross-sectional view showing a BB cross section of the drawing shown in FIG.

7 is a vertical sectional view showing a CC cross section of the drawing shown in FIG. 5;

8 is a vertical cross-sectional view showing a DD cross section of the drawing shown in FIG.

FIG. 9 is a diagram of a lower balancer showing a second embodiment of the washing machine according to the present invention.

FIG. 10 is an elevational view of a lint-collecting water passage showing a third embodiment of the washing machine according to the present invention.

FIG. 11 is a bottom balancer diagram showing a fourth embodiment of the washing machine according to the present invention.

12 is a vertical sectional view showing an EE section of the drawing shown in FIG.

[Explanation of symbols]

6A ... Outer tub, 6B ... Laundry tub, 8 ... Sprinkler, 9 ... Sprinkler,
10 ... Dehydration hole, 11 ... Rotor blade, 12 ... Back blade, 13 ... Water guide channel, 14 ... Lower balancer, 29 ... Water passage, 32 ... Projection part.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsumi Togashi 502 Jinritsucho, Tsuchiura-shi, Ibaraki Machinery Research Laboratory, Hiritsu Manufacturing Co., Ltd. No. 1 Company, Hitachi Ltd., Electric Appliances Division, Taga Headquarters

Claims (7)

[Claims] 1. A washing tub for washing and dehydrating laundry, a rotary wing provided on the bottom of the washing tub, a back blade provided on the back side of the rotary wing, and an inner bottom of the washing tub. A lower balancer that is provided to reduce shake of the washing tub at the time of dehydration, a water guide channel that is provided in a part of the lower balancer and receives the washing liquid sent from the back blade of the rotor blade, and the washing liquid that is connected to the water guide channel A sprinkling passage having a sprinkling port for sprinkling water inside the washing tub, a water passage provided near the outer periphery and the bottom of the lower balancer for connecting the inside of the washing tub and the back blade, and rotating the rotary blade and the washing tub. A washing machine comprising a driving device for driving the washing machine. 2. A washing tub for washing and dehydrating laundry, a rotary wing provided on the bottom of the washing tub, a back blade provided on the back side of the rotary wing, and an inner bottom of the washing tub. A lower balancer that is provided to reduce shake of the washing tub at the time of dehydration, a water guide channel that is provided in a part of the lower balancer and receives the washing liquid sent from the back blade of the rotor blade, and the washing liquid that is connected to the water guide channel A sprinkling passage having a sprinkling port for sprinkling water inside the washing tub, a recess provided in an outer periphery and a part of the bottom of the lower balancer, and the inside and the back of the washing tub formed between the inner wall and the bottom of the washing tub. A washing machine comprising: a water passage connecting blades; and a drive device for rotating the rotary blade and the washing tub. 3. A washing tub for washing and dehydrating laundry, a rotary wing provided on the bottom of the washing tub, a back blade provided on the back side of the rotary wing, and an inner bottom of the washing tub. A lower balancer that is provided to reduce the shaking of the washing tub during dewatering, a water conduit provided in a part of the lower balancer for receiving the washing liquid sent out from the back blades of the rotor blades, and a low water level operation connected to the water conduit. A sprinkling passage having a sprinkling port for sprinkling a washing liquid into the washing tub, a water passage provided near the outer periphery and the bottom of the lower balancer to connect the inside of the washing tub with the back blade, the rotary blade, and A washing machine comprising a drive device for rotating a washing tub. 4. A washing tub for washing and dehydrating laundry, a rotary wing provided on the bottom of the washing tub, a back blade provided on the back side of the rotary wing, and an inner bottom of the washing tub. A lower balancer that is provided to reduce the shaking of the washing tub during dewatering, a water conduit provided in a part of the lower balancer for receiving the washing liquid sent out from the back blades of the rotor blades, and a low water level operation connected to the water conduit. A sprinkling passage having a sprinkling port for sprinkling washing liquid into the washing tub; a plurality of water passages provided near the outer periphery and the bottom of the lower balancer to connect the inside of the washing tub and the back blade; A washing machine comprising a rotating blade and a drive device for rotating a washing tub. 5. The washing machine according to any one of claims 1 to 4, wherein the height of the water spout is set to be equal to or higher than the water level set in the low water level operation. 6. A washing tub for washing and dehydrating laundry, an upper balancer provided on the upper part of the washing tub to reduce shake of the washing tub during dewatering, and a rotor provided on the bottom of the washing tub. , A back blade provided on the back side of the rotary wing, a lower balancer provided on the inner bottom of the washing tub to reduce shake of the washing tub during dehydration, and a back blade of the rotary wing provided on a part of the lower balancer First and second water conduits for receiving the washing liquid delivered from the first and second water spray passages, which are connected to the first water conduit and have a water spout for sprinkling the washing liquid into the washing tub during low water level operation. A second water spray passage having a water spray port connected to the second water conduit for spraying washing liquid into the washing tub during high water level operation; and a washing tub provided near an outer periphery and a bottom of the lower balancer. Inside and the back blade Washing machine, characterized a plurality of water passage for connection, the more becomes possible and the driving device for rotating the rotary blade and the washing tub. 7. A washing tub for washing and dehydrating laundry, an upper balancer provided on the upper part of the washing tub to reduce run-out of the washing tub at the time of dehydration, and a rotor provided on the bottom of the washing tub. , A back blade provided on the back side of the rotary wing, a lower balancer provided on the inner bottom of the washing tub to reduce shake of the washing tub during dehydration, and a back blade of the rotary wing provided on a part of the lower balancer First to third water conduits for receiving the washing liquid sent out from it, and a first water sprinkling passage connected to the first water conduit for sprinkling the washing liquid into the washing tub during low water level operation. A second water sprinkling passage connected to the second water conduit and having a spout for sprinkling the washing liquid into the washing tub during a high water level operation; and a washing liquid connected to the third water diversion passage during the washing operation. Discharges into the washing tub to collect lint, etc. A collecting passage having a net and a discharge port, a plurality of water passages provided near the outer periphery and the bottom of the lower balancer to connect the inside of the washing tub with the back blade, the rotor and the washing tub. A washing machine comprising a driving device for rotating the washing machine.