JPH0956986A - Fully automatic washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the washing power by sprinkling washing water jetted from a discharge opening part fully over washing floated on the water surface regardless of water level, promoting the dissolution of detergent and the permeation of washing water to the washing, at the same time, promoting cloth movements in the washing water at a high water level. SOLUTION: A back blade 6a to rotate the same as a rotary vane 6 is provided on the back side of the rotary vane 6. ON the inside wall surface of a washing basket 5, a cover 20a extending to the upper part of the washing basket 5, and cover 20c, 20d provided at positions lower than that of the cover 20a are provided, and circulation passages 21c, 21d are formed between the respective covers and the washing basket 5. The respective covers are arranged at a rotary vane axis in point symmetry, and at the lower parts, water leading opening parts to lead to each circulation passage washing water to be pushed out from the back blade 6a are provided, and at the upper parts, discharge opening parts to discharge the washing water from level to the lower part toward the washing basket 5 inside are provided. In addition, return holes 27 provided on the washing basket wall surface are increased in the vicinity of the bottom, and bottom return holes 27 are arranged even to the washing basket bottom located in the periphery of the rotary vane 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fully automatic washing machine capable of eliminating washing unevenness and improving washing power by sufficiently permeating the washing water floating on the washing water surface. .

[0002]

2. Description of the Related Art In order to improve the washing power of an electric washing machine,
As described in JP-A-7-8680, there is known a washing machine provided with a plurality of means for circulating wash water. This is provided with a plurality of washing water circulation passages (hereinafter simply referred to as circulation passages) on the wall surface of a washing / dehydrating tub (hereinafter simply referred to as a washing tub), and is discharged from the back-blade centrifugal pump of the rotary blade provided at the lower portion of the washing tub. The washing water is received at each water guide opening, guided to the upper part of the washing tub, and sprayed over a wide range from the discharge opening at the upper part of the washing tub. Then, wash water is applied to the laundry that has floated on the surface of the wash water to promote the penetration of the wash water into the laundry,
It improves the cleaning power.

Further, there is known a washing machine in which four circulation paths are provided on the wall surface of the washing tub as shown in the schematic structure of FIG. FIG. 3A is a vertical side view of the washing tub,
FIG. 11B is a transverse sectional view taken along line JJ of FIG. A return hole 106 is provided on the wall surface of the washing tub 102 housed inside the outer tub 101 which is a water receiving tub,
Four circulation paths 103a, 103b, 103c, 103d
Two of them 103a, 103b guide the washing water to the upper part of the washing tub as described above, and discharge openings 104a, 1
04b (not shown) is discharged onto the washing water surface. One of these two is provided with a lint collection net 105 at the discharge opening 104a, and the discharge water force is weakened there, so that the effect of the preceding example is obtained from one of the two 103.
b. The other two 103c and 103d eject the washing water upward into the washing tub from the discharge openings 104c and 104d at the height near the bottom of the washing tub. FIG. 7C shows the outline of the ejection openings 104c and 104d. This is because when the wash water is filled above the discharge openings 104c and 104d, the wash water spouting upward from the discharge openings creates a water flow in the washing tub, which promotes the movement of the laundry in the wash water. It is installed for the purpose of As a result, the cloth-to-cloth friction or the cloth-to-vane friction is increased to improve the cleaning power.

[0004]

In the washing machine described in Japanese Patent Laid-Open No. 7-8680, the discharge opening at the upper part of the washing tub is provided when the washing water is filled up to near the upper part of the washing tub. From a wide range of fountains. However, at low water level where the washing water is filled only below the middle height of the washing tub or when the water level becomes extremely low, an underwater return hole (returning the washing water to the back blade) is opened in the washing tub. Area, which also serves as a dewatering hole during dewatering), reduces the amount of washing water that returns from the washing tub to the outer tub and the washing tub is less than the flow rate of the back blade pump, and The washing water between the tub and the washing tub is insufficient, a sufficient circulation flow rate cannot be obtained, and the amount of water and the water pressure from the discharge opening portion decrease, so that the worst discharge is impossible. Therefore, there is a problem that the effect obtained at high water level cannot be expected.

Further, in the washing machine shown in FIG. 38, when the water level is high, a wide range of water is sprayed from the discharge opening 104b in the upper part of the washing tub, so that the washing water floating on the surface of the washing water can be widely washed. You can call. In addition, the washing water ejected upward from the underwater discharge openings 104c and 104d creates a flow of water in the washing tub, which accelerates the movement of the laundry in the washing water and causes friction between the cloth and the cloth or the blades. Friction increases.

However, the water level of the washing water is determined by the discharge opening 104.
When it is lower than c and 104d, since these discharge openings face upward, the discharged wash water does not cover the entire laundry, and the effect of promoting wetting of the laundry is small. Further, in this case, the number of the return holes 106 on the wall surface of the washing tub 102 is extremely reduced, so that the flow rate of the washing water returning from the washing tub 102 to the outer tub 101 and the washing tub 102 is smaller than the flow rate by the pump of the back blade, Repeated reversing of the rotary blades causes insufficient washing water between the outer tub and the washing tub, and a sufficient circulation flow cannot be obtained.
Not only the discharge openings 104a and 104b but also the discharge opening 1
There is a problem that the amount of water discharged from 04c and 104d and the water pressure decrease.

Furthermore, since the four circulation paths are not arranged point-symmetrically around the rotation axis of the washing tub, there is a fixed imbalance in the washing tub 102, and the washing tub swings greatly during dewatering, causing the outer frame to move. There is also the problem that the probability of making a noise and making abnormal noises increases as a result of collisions and the start of dehydration.

However, no means for solving this problem is disclosed in these washing machines.

According to the present invention, the washing water ejected from the discharge opening is applied to the upper surface of the laundry floated on the water surface to promote the penetration of the washing water into the laundry and to move the cloth in the washing water at a high water level. It is a first object of the present invention to provide a washing machine which accelerates the washing power and improves the washing power, and spouts the washing water so as to prevent the penetration of the washing water and the floating of the laundry at low and extremely low water levels.

It is a second object of the present invention to provide a washing machine which spouts sufficient washing water so as to splash the laundry regardless of the high water level, low water level or extremely low water level.

A third object of the present invention is to provide a washing machine which stabilizes the rotation start of the washing tub during dehydration so that the circulation path installed in the washing tub does not become unbalanced.

[0012]

In order to achieve the first object, a washing / dehydrating tub housed in a water receiving tub, and a rotary blade rotatably arranged at the inner bottom of the washing / dehydrating tub, The back surface of the rotary blade is provided with a back blade that rotates in the same manner as the rotary blade, and a drive device that reversely rotates the rotary blade.
A first flow path forming means extending above the washing / dehydrating tub;
A fully automatic washing machine is provided in which a second flow path forming means extending to a position lower than that of the first flow path forming means is provided, and discharge openings downward from the horizontal are provided above the respective flow path forming means.

Alternatively, a washing / dehydrating tub housed in the water receiving tub, a rotary blade rotatably arranged on the inner bottom of the washing / dehydrating tub, and a back blade rotating on the back surface of the rotary wing in the same manner as the rotary wing. , A drive device for reversing and rotating the rotary vanes, the first flow path forming means extending to above the washing / dehydrating tub on the inner wall surface of the washing / dehydrating tub, and 1/4 of the rated water level of the washing / dehydrating tub. A second higher than the first flow path forming means and extending to a position lower than the first flow path forming means.
The above-mentioned flow path forming means is provided, and a discharge opening portion that is downward from the horizontal is provided above each flow path forming means.

Alternatively, a washing / dehydrating tub housed in the water receiving tub, a rotary blade rotatably arranged on the inner bottom of the washing / dehydrating tub, and a back blade rotating on the back surface of the rotary wing with the rotary blade. , A drive device for reversing the rotation of the rotary vanes, the first flow path forming means extending on the inner wall surface of the washing / dehydrating tank to a position above the washing / dehydrating tank, and 1/4 of the first flow path forming means. And a second flow path forming means extending to a position higher than the height of the first flow path forming means and extending to a position lower than the first flow path forming means, and a discharge opening portion downward from the horizontal direction is provided above each flow path forming means. Let's take a chance.

In order to achieve the second object, in the above fully automatic washing machine, the area of the water guiding opening of the first flow path forming means and the area of the water guiding opening of the second flow path forming means differ. Let

Alternatively, among the first flow path forming means, a flow path forming means having a catching net provided at the discharge opening is provided, and the area between the water guiding opening and the water guiding opening of the other flow path forming means. Be different.

Alternatively, a wash water return hole may be provided on the side surface of the washing / dehydrating tub, preferably on the bottom surface, and the return hole on the side surface may be provided as a second hole.
It is densely provided at a position lower than the position higher than the flow path forming means.

Alternatively, a balancer is provided around the rotary blade at the bottom of the washing / dehydrating tub, and a return passage for washing water is provided between the washing / dehydrating tub and the balancer around the rotary blade.

Alternatively, a balancer is provided around the rotary blade at the bottom of the washing / dehydrating tub, and a water conduit for washing water is provided directly above the balancer.

In order to achieve the third object, two first flow path forming means are opposed to each other, two second flow path forming means are opposed to each other, and the flow path forming means are spaced apart by 90 degrees. It is a fully-automatic washing machine to be placed in.

Further, preferably, a balancer is provided around the rotary blade at the bottom of the washing / dehydrating tub.

The flow path forming means is specifically a cover. Further, the discharge opening portion that is downward from the horizontal is an opening portion that is attached so that washing water is jetted downward from the horizontal. Also, the rated water level is the water level when the rated amount of laundry of the washing machine is put in, and the diameter or radius of the washing tub and the bath ratio (the amount of water used per kg of laundry (kg))
Can be determined by

[0023]

[Function] As the rotary blade rotates, the back blade also rotates, and the washing water in the washing tub passes through the gap between the outer tub and the washing tub from the return hole and is sucked into the back wing by the centrifugal pump action of the back wing. It is pushed out and enters the circulation path from each water transfer opening,
It spouts from each discharge opening into the washing tub. Therefore, when the water level is high, a wide range of water is sprayed from the discharge opening at the top of the washing tub, so it is possible to apply a wide range of washing water to the laundry floating on the surface of the washing water. It promotes and improves the cleaning power. Further, the washing water is jetted downward from the horizontal from the discharge opening of the second flow path forming means which is submerged in the washing water. This creates a water flow in the washing tub that directs the laundry downwards, i.e. towards the rotor. The laundry is pushed by this water flow and touches the rotor blades, and the rotation causes the laundry to be twisted and gathered in the central portion, and sequentially moves to the washing water surface. In other words, the laundry in the wash water is promoted to move upward on the rotary wing shaft and downward along the wall surface of the washing / dehydrating tub, so that the clothes are rubbed between the cloths or the cloth is rubbed during the movement. The increased friction of the blades improves the cleaning power.

Even at a low water level, there is a sufficient return hole below the surface of the wash water, and the wash water jetted into the washing tub immediately returns to the space between the outer tub and the washing tub through the return hole. There was no shortage of wash water supplied to the back blade pump, the amount of circulating water did not decrease, and it sprayed over a wide area from the discharge opening of the second flow path forming means in the center of the washing tub, so it floated on the surface of the wash water. Wash water can be applied to a wide range of laundry. Further, from the upper opening, that is, the discharge opening of the first flow path forming means, the water force is inferior to that of the lower opening, that is, the discharge opening of the second flow path forming means, but the washing water is jetted downward from the horizontal. That is, the washing water falls on the laundry that floats above the surface of the washing water like a two-tiered waterfall, promoting the penetration of the washing water into the laundry and improving the washing power.

At this time, by making the area of the water guide opening of the first flow path forming means larger than that of the second flow path forming means, the water force from the discharge port can be made the same. .

In the case where the lower balancer is arranged,
Immediately after the washing water spouted into the washing tub passes through the return passage and returns between the outer tub and the washing tub, a sufficient amount of washing water is spouted from each discharge opening.

[0027]

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

FIG. 1 is a vertical sectional side view showing a first embodiment of a fully automatic washing machine according to the present invention. The exterior is composed of an outer frame 1 and a lid 2 and the like, which is openably and closably attached to an upper edge portion of the outer frame 1. The outer tank 3, which is a water receiving tank, has a tank cover 3b at its upper edge.
And is supported in a state of being suspended from the upper four corners of the outer frame 1 through the cushioning members 4a by the suspension rods 4b in the outer frame 1, and the washing water in the washing process and the rinsing water in the rinsing process (hereinafter, washing (Called water).

Washing / dehydrating tub 5 installed inside the outer tub 3
A rotary blade 6 is provided at the center of the washing tub (hereinafter referred to as a washing tub), and a plurality of back blades 6a that rotate in the same manner as the rotary blade 6 are provided on the back side of the rotary blade 6. A large number of dewatering holes / washing water return holes (hereinafter simply referred to as return holes) 27 are formed on the side wall surface, and the density becomes higher toward the lower part. Return hole 27
Discharges the water separated from the laundry to the outer tub 3 by the centrifugal force generated by the high-speed rotation of the washing tub 5 during dehydration. It is also a return hole for returning the washing water in the washing tub 5 to the back blade 6a as described later.

An upper balancer 16 is mounted on the upper edge of the washing tub 5. The upper balancer 16 encloses a fluid in a partitioned room to reduce the shake of the washing tub 5 during high-speed dehydration. A hub 7 is joined to the outer surface of the bottom wall of the washing tub 5, and the hub 7 is provided with a water inlet 24.

The drive motor 11 attached to the drive unit base 10 installed on the outer side of the bottom wall of the outer tub 3 is connected by a belt 13 and a transmission device 12 which is a combination of a gear reduction mechanism and a clutch mechanism. The output shaft of the transmission device 12 is a concentric double output shaft 6c, 6d, which penetrates the bottom wall of the outer tub 3 in a watertight state and projects into the outer tub 3, and the output shaft 6c has a screw 6b to which the rotor blade 6 is attached. It is attached and the output shaft 6d is connected to the hub 7. The transmission device 12 rotates the rotary blades 6 in the forward and reverse directions at 100 to 200 rpm in the washing process and the rinsing process, and in the dewatering process, the washing tub 5 joined to the hub 7 is 700 to 1100.
Rotate at high speed with rpm.

Inside the upper part of the outer frame 1, there are a water supply port 18a, a water supply valve 18 and a control device 19. The controller 19 is provided with a switch for selecting the water level, the washing time, the washing course, and the like.

A hose from a tap is connected to the water supply port 18a. Water from the tap is supplied from the water supply port 18a to the controller 1
Water is supplied to the washing tub 5 through a water supply valve 18 that is opened and closed at 9. The drainage port 3a formed on the bottom wall of the outer tub 3 is connected to a drainage hose 15 via a drainage valve 14 to form a drainage system. A water level sensor air chamber 17a is attached below the outer wall of the outer tub 3, and is connected to the water level sensor 17b by a tube 17c. The water level sensor 17b detects the water level of washing water. Washing water circulation paths 21c and 21d are provided on the inner peripheral side wall surface of the washing tub 5, and are formed by the inner peripheral side wall surface of the washing tub 5 and the covers 20c and 20d. 20a is a similar cover and has a wash water circulation path inside. Each cover has a discharge opening 25a for discharging the washing water 8,
There are 25c and 25d.

FIG. 2 is a transverse sectional view taken along the line AA in FIG. The bottom surface of the washing tub 5 is provided with a bottom surface dehydration hole / wash water return hole (hereinafter simply referred to as a bottom surface return hole) 28.
The washing water circulation paths 21a, 21 are provided on the inner peripheral side wall surface of the washing tub 5.
There are b, 21c, and 21d.
a and 21b face each other, 21c and 21d face each other, and 21a
And 21c are provided at an angle of 90 degrees. The washing water circulation paths 21a, 21b, 21c, 21d are formed by the inner peripheral side wall surface of the washing tub 5 and the covers 20a, 20b, 20c, 20d. 22a, 22b, 22c and 22d are water guide openings. It should be noted that, in some cases, 20b and the like which cannot be seen due to a cross-sectional view will be described below in the text.

FIG. 3 is a vertical sectional side view taken along line BB in FIG. 2, and FIG. 4 is a vertical sectional side view taken along line CC in FIG. The covers 20a, 20b, 20c and 20d form the inner peripheral side wall surface of the washing tub 5 and circulation paths 21a, 21b, 21c and 21d. The water guiding openings 22a, 22b, 22c, 22d of the water guiding paths 39a, 39b, 39c, 39d are largely opened toward the outlet of the back blade 6a.

At the time of washing, as shown by the arrow, the washing water returns from the return hole 27 and the bottom return hole 28 to the back blade 6a, is pushed out by the centrifugal pump action by the rotation of the back blade 6a, and the water guide opening 22a, It flows from 22b, 22c, 22d into the washing water circulation paths 21a, 21b, 21c, 21d via the water conduits 39a, 39b, 39c, 39d.

FIG. 5 is an elevation view of the cover 20a, FIG. 6 is an elevation view of the cover 20b, and FIG. 7 is an elevation view of the covers 20c and 20d. The covers 20a and 20b have a height up to the upper part of the wall of the washing tub (below the upper balancer 16), and the cover 2
0a, 20b have water guide openings 22a, 22b facing the outer periphery of the back blade 6a, and discharge openings 25a, 25 for ejecting washing water to the laundry to be washed at the upper part of the cover.
b is provided toward the inside of the washing tub 5. The discharge opening 25b is provided with a lint collecting net 36. The frame 37 of the collecting net 36 is inserted and attached to the groove 38 of the discharge opening 25b. The covers 20c and 20d have a height up to the middle of the wall surface of the washing tub.
In the lower part of d, the water guide opening 2 is provided facing the outer periphery of the back blade 6a.
2c and 22d, and the discharge opening 25 is provided on the upper part of the cover.
c and 25d are provided toward the inside of the washing tub 5.
In addition, the upper wall surface 35a of the water conduit formed integrally with the cover,
35b, 35c, 35d and water conduit side walls 34a, 34
The b, 34c, 34d and the bottom wall surface of the washing tub form a water conduit.

8 (a) and 8 (b) are sectional views of the internal shape of the discharge opening 25a taken along the lines KK and LL in FIG. The circulating flow of washing water is bent downward just before the discharge opening 25a as shown in the cross-sectional view, and is spread horizontally in the horizontal direction. As a result, the wash water falls downward in a fan-shaped spread form to the left and right. Discharge opening 25c,
25d is similarly configured.

FIG. 9 is a view of the bottom of the washing tub 5 as seen from above with the rotor and cover removed. 40a, 4 in the figure
0b, 40c, 40d are walls which the outer sides of the water guide channel side walls of the cover constituting the circulation channel are combined, 41a, 41b, 41c,
41d is a washing tub bottom surface which forms a water conduit by combining the upper wall surface of the water conduit of the cover and the side wall of the water conduit.

FIG. 10 is a block diagram of the control unit. Configuration of control device 19 and water supply valve 18, drain valve 14, drive motor 11, cloth amount sensor 71, water level sensor 1 which will be described later
7 shows a block diagram of electrical connection with 7b. The control device 19 is operated by the user, mainly the microcomputer 19a, and the intention is the microcomputer 1
From a start switch 19b input to 9a, course selection switches 19c, 19d, 19e, a display 19f for displaying user operation or operation details of the washing machine, a drive circuit 19g for opening / closing a water supply / drain valve and rotating a drive motor. Composed. The outputs of the cloth amount sensor 71 and the water level sensor 17b are input to the microcomputer 19a. With this configuration, the control device automatically controls the water supply / drainage, the drive motor, etc. based on the information from each sensor so as to perform the washing reflecting the intention of the user.

FIG. 11 shows the structure of the water level sensor 17b.
The plastic cylinders 17d and 17e are circular rubber films 17
The tube 17 is integrated with the cylindrical body 17e by sandwiching f.
A protrusion 17g for inserting c is provided. A coil 17h is housed inside the cylindrical body 17d, and a cylindrical ferrite core 17i moving in the coil 17h is a spring 17j.
And a rubber film 17f. When the pressure in the water chamber 17a for the water level sensor rises due to the water level in the washing tub 5, the pressure in the cylindrical body 17e connected by the tube 17c also rises, so that the rubber film 17f is deformed and the ferrite core 17 is deformed.
Push up i. As a result, the inductance of the coil 17h becomes large.

FIG. 12 shows the electrical connection of the water level sensor 17b. The parallel circuit including the coil 17h and the capacitor 17k is connected to the oscillator circuit 17l, and the sine wave output of the parallel oscillator circuit is converted into a rectangular wave by the inverter 17m and the microcomputer 1
9a. FIG. 13 shows an example of the relationship between the oscillation frequency and the water level. If the amount of water is large and the water level is high, a large amount of ferrite core 17i is inserted into the coil and coil 17i
Since the inductance increases, the oscillation frequency decreases. The microcomputer 19a stores this relationship inside as a table and detects the frequency from the input rectangular wave to know the water level.

The rated washing capacity 7k configured as described above
A description will be given of the case of laundering a large amount of laundry of, for example, 6 kg which is close to the rated value in the fully automatic washing machine of g. FIG.
In this case, the water level Ha (the height from the bottom of the washing tub to the water surface 8) during washing, the movement of the laundry 9, the state of circulation of the washing water 8 and the washing water from the discharge openings 25a, 26b, 25c, 25d 8 Shows the state of ejection.

Put the laundry 9 and detergent into the washing tub 5,
Select the high water level course 19c with the course selection switch,
When the start switch 19b is pressed, the amount of laundry 9 is first detected. As a method of detecting the amount of laundry, a method of directly measuring the mass of laundry with a load sensor attached to the hanging bar 4b or a rotation of a rotary blade that continues to rotate due to inertia when the rotary blade 6 is rotated / rested There is a method in which the back electromotive force of the drive motor 11 is used to measure that the reduction rate of the number varies depending on the amount of laundry. FIG. 15 shows an electrical connection diagram of the cloth amount sensor 71 and the drive motor 11 for detecting the cloth amount which is the mass of the laundry by the latter method.

The drive motor 11 uses a signal from the microcomputer 19a to output a bidirectional three-terminal thyristor 19ga, 1 of the drive circuit.
Commercial power is applied via 9 gb to rotate. Microcomputer 1 for the gate terminal of bidirectional 3-terminal thyristor 19ga
When the signal from 9a is applied, the drive motor 11 rotates forward, and when the signal from the microcomputer is applied to the gate terminal of the bidirectional 3-terminal thyristor 19gb, it rotates in the reverse direction. The drive motor 11 rotates the loaded laundry, and the belt 13,
It is moved by the rotor 6 via a transmission 12. At this time, the resistance applied to the rotor 6 changes depending on the amount of laundry. This change largely appears in the counter electromotive force appearing between the terminals when the drive motor 11 is stopped.

FIG. 16 shows the operation timing of the cloth amount sensor 71. The drive motor 11 rotates as it is for a short time due to inertial force even when the commercial power supply is turned off. At this time, the drive motor operates as a generator and generates a voltage between the terminals. This voltage and frequency change due to inertial force. That is, the laundry on the rotary blades carries a part of this inertial mass. The cloth amount sensor 71 divides the counter electromotive voltage appearing in the capacitor 11a connected between the drive motor terminals by the resistors 71a and 71b, and takes out in an electrically insulated form by using the photocoupler 71c, which is pulsed by the inverter 71d. Convert and output to the microcomputer. The amount of cloth is detected from the time interval of this pulse.

FIG. 17 shows an example of the relationship between the cloth amount and the pulse time interval in the cloth amount sensor 71. The pulse time interval ΔT and the cloth amount are in a proportional relationship. If this relationship is stored as a table in the microcomputer in advance, the cloth amount can be known by measuring the time interval of pulses input to the microcomputer. At this time, it is possible to improve accuracy by measuring multiple times.

After the cloth amount sensor 71 detects the cloth amount,
The controller 19 controls the water supply valve 18 to start water supply. The controller 19 monitors the signal from the water level sensor 17b and supplies water into the washing tub 5 according to the amount of laundry until the water level becomes high so that the entire laundry is submerged in water. When reaching the water level Ha, the water supply valve 18 is closed to stop the water supply. The water level Ha is determined by the diameter Φ of the washing tub 5 and the bath ratio during washing (the amount of water used per kg of laundry (kg)). For example, in a washing tub with Φ = 470 mm, for example, the bath ratio is 8
Then, the amount of water is 8 × 6 (kg) = 48 (kg), and the water level Ha is about 270 mm. Water level H at the time of rating (8 kg)
m is about 320 mm in a similar calculation.

The discharge openings 25a and 25b are provided below the upper balancer 16 at a position 20 to 50 mm higher than the water level Hm so that the jetted washing water 8 can spread sufficiently even when placed at the rated time. The bath ratio is 6 ~
About 10 is desirable.

At such a high water level Ha, the laundry 9 floats in the washing water 8 and a part of the laundry 9 appears on the water surface 8a. The laundry 9 below the water surface 8a is separated from the rotary wing 6.

When the water supply is completed, the washing process starts. When entering the washing process, the drive motor 11 is controlled by the control device 19 so as to repeat right rotation, pause, left rotation, and pause. The rotation of the drive motor 11 is transmitted to the rotary blades 6 via the belt 13 and the transmission device 12. Therefore, the rotary blades 6 rotate according to the rotation of the drive motor 11, the laundry 9 and the wash water 8 are agitated, and the laundry 9 is washed.

When washing is started, for example, the rotor 6 is moved to 10
Rotate clockwise for 1 second at a speed of 0 to 200 rpm, then 0.7
Repeatedly pause for 2 seconds, then rotate left for 1 second at the same speed as right rotation, and then repeat 0.7 second rest for 15 minutes.
The control device 19 controls the drive motor 11. When the rotary blades 6 rotate, the back blades 6a also rotate, and the washing water 8 between the washing tub 5 and the outer tub 3 passes through the water suction port 24 opened in the center of the washing tub 5 and the hub 7. It is sucked into the back blade 6a and pushed out by the centrifugal pump action by the rotation of the back blade 6a, and the water guide openings 22a, 22b, 22c, 22d.
Flow through the water conduits 39a, 39b, 39c, 39d into the washing water circulation paths 21a, 21b, 21c, 21d, and from the discharge openings 25a, 25b to the washing water surface 8a in the washing tub 5.
It jets out to the upper laundry 9 and also to the laundry 9 in the washing water in the washing tub 5 through the discharge openings 25c and 25d. The lint collection net 36 attached to the discharge opening 25b collects the lint contained in the wash water 8.

The water level in the washing tub rises and the water level between the outer tub 3 and the washing tub 5 lowers by the amount of the washing water sprayed into the washing tub 5. The washing water passes between the outer tub 3 and the washing tub 5 through the side return hole (hole for dehydration) 27 below the washing water surface 8a, the bottom return hole 28, the gap between the rotary blade 6 and the washing tub 5, and between the outer tub 3 and the washing tub 5. 14 and circulates as shown by the arrow in FIG.

Thus, the discharge opening 25a on the upper part of the washing tub 5
Since the washing water spouts over a wide range from the above, it is possible to sprinkle the washing water on the laundry 9 floating on the washing water surface 8a in a wide range, promote the penetration of the washing water 8 into the laundry, and improve the washing power. improves. In addition, the washing water from the discharge opening 25b is collected by the lint collection net 36 to collect the lint released from the laundry 9 contained therein, and then falls into the washing tub. As a result, the attachment of lint to the laundry 9 is prevented, and a clean finish can be achieved.

Further, the discharge opening 25 which is submerged below the washing water surface
The washing water 8 is jetted downward from the horizontal direction from c and 25d. For this reason, a water flow that causes the laundry 9 in the washing water 8 to be directed downward, that is, toward the rotary blade 6, is generated in the washing tub 5. The laundry 9 is pushed by this water flow and comes into contact with the rotary blades 6, and by the rotation thereof, it is twisted and gathered in the central portion, and sequentially moves onto the washing water surface. In other words, the laundry 9 in the wash water 8 is promoted to move upward on the axis of the rotary blade 6 and downward along the wall surface of the washing tub 5 so that the upper and lower parts are interchanged. The cleaning power is improved by increasing the friction or the friction between the cloth and the blade.

Next, the case of washing a small amount of laundry will be described. FIG. 18 shows the water level Hb during the washing, the movement of the laundry 9, the state of circulation of the washing water 8 and the discharge opening 25 in this case.
The state of discharge of washing water from a, 25b, 25c, and 25d is shown. When the laundry 9 and the detergent are put into the washing tub 5, the low water level course 19d is selected by the course selection switch, and the start switch 19b is pressed, the laundry amount sensor 71 is first used to wash the laundry as in the case of the high water level described above. Detect the amount of. After that, the controller 19 controls the water supply valve 18 to start the water supply, and a low water level H such that the laundry is roughly immersed in water according to the amount of the laundry based on the signal from the water level sensor 17b.
Fill the washing tub 5 up to b.

If the small amount is 4 kg and the bath ratio is the same as the above high water level, the water level Hb is 138 mm. Discharge opening 2
5c and 25d are designed at positions 20 to 50 mm higher than this water level. At this time, all the discharge openings are on the washing water surface 8a. At such a low water level, the laundry 9 floats in the washing water 8 and a part of the laundry 9 appears on the washing water surface 8a.
Further, the laundry under the water surface is separated from the rotary blade 6.

When the water supply is completed, the washing process starts. The washing process is the same as at the high water level described above.

FIG. 19 shows an example of the relationship between the circulation flow rate Q by the back blade pump and the head H. This is the result of an experiment conducted with a pair of two covers of the flow path forming means, with no laundry and only washing water. Here, the lift H is the height from the washing water surface 8a to the discharge opening. As shown in the figure, the circulation flow rate Q decreases as the head increases. Therefore, considering the circulation paths 21a and 21b, the head H is at a low water level Hb.
Becomes higher and the circulating water amount Q becomes smaller than the high water level Ha. In other words, the amount of washing water discharged from the discharge openings 25a and 25b is small as it is, and cannot be discharged if it is worse.

In FIG. 20, as in the present embodiment, the flow path forming means has two pairs of four covers, and as in the case of FIG. 19, the circulation is carried out when an experiment is conducted with only washing water without laundry. Flow rate Q
And the return hole total area S below the washing water surface 8a. As shown, the total area S under the water is 50 cm.
^When it becomes less than ² , the circulation flow rate Q sharply decreases. At 70 cm ² or more, the circulation flow rate Q has a substantially constant value determined by the capacity of the back blade pump used. In this embodiment, it is 80 l / min. The maximum value of the circulation flow rate Q is smaller than that of FIG. 19 because the cover of the flow path forming means is
This is because, unlike in the case of FIG. 19, since there are four, the absolute amount of water per one decreases.

At this time, when the return holes 27 are evenly distributed in the washing tub 5, since the return hole area S below the water surface is smaller at the low water level Hb than at the high water level Ha, the washing tub 5 and the back blade are removed. The amount of wash water returning to 6a becomes smaller than the flow rate of the back blade 6a by the pump action, and as a result, the circulation flow rate Q decreases.
When the rotary blades 6 are inverted several times, the washing water cannot be completely returned from the washing tub 5 to the outer tub 3 and the washing tub 5, the amount of the washing water supplied to the back blade 6a is insufficient, and the circulation flow rate is reduced. There was a problem.

Therefore, in this embodiment, the return holes 27 are densely arranged below the lower discharge opening, particularly below the low water surface.
Moreover, the bottom surface return hole 28 is also provided on the bottom surface of the washing tub so that the total area A of the return holes below the water surface does not fall below 50 cm ² even at a low water level, and the circulation flow rate Q is set to 80 l / min. Moreover, the total area A of the return holes is at least 25 cm.
² , so that the circulation flow rate Q does not fall below 50 l / min. Especially the discharge openings 25c, 2
For 5d, the reduction of the total area A of the return holes below the water surface is more affected than the lift H.

FIG. 21 is a value showing an example of the relationship between the circulation flow rate Q by the back blade pump and the water guide opening area A. This is also the result of an experiment conducted in the same manner as in FIG. 19 in which the flow path forming means has a pair of two covers and only the washing water without the laundry. As shown in the figure, the circulation flow rate Q increases in proportion to the water guide opening area A. In this embodiment, the area A of the water transfer opening is
Is greatly expanded, and a sufficient amount, specifically, at least the amount of washing water in which the circulation flow rate Q does not fall below 50 l / min is introduced into the back blade 6a.

As described above, in this embodiment, even when the water level is low, there is a sufficient total area of the return holes 27 below the surface of the wash water, and the wash water jetted into the washing tub immediately passes through the return holes to reach the outer tub. Since it returns to the washing tub, the washing water supplied to the back blade pump 6a does not run short, and the water transfer openings 25a, 25 are provided.
Since the areas of b, 25c, and 25d are large, the circulating water amount does not decrease, and the discharge openings 25c and 2 at the center of the washing tub
Since the water is sprayed over a wide range from 5d, it is possible to apply the wash water over a wide range to the laundry floating on the surface of the wash water.

Discharge opening 25a located one step higher
Although the water force is inferior to that of the discharge openings 22c and 22d, the wash water is jetted downward from the horizontal. That is, the washing water falls on the laundry that floats above the surface of the washing water like a two-tiered waterfall, promoting the penetration of the washing water into the laundry and improving the washing power. Further, the washing water from the discharge opening 22b is collected by the lint collection net 36 to collect the lint released from the laundry contained therein and then falls into the washing tub. As a result, even if the water level is low, the attachment of lint to the laundry can be prevented, and a clean finish can be achieved.

A case of washing a small amount (for example, up to 2 kg) of stubborn soiled laundry will be described. FIG. 22 shows the water level Hc during the washing, the movement of the laundry 9, the state of circulation of the washing water 8 and the state of discharging the washing water from the discharge openings 25a, 25c, 25d in this case. When the laundry 9 and the detergent are put into the washing tub 5, the extremely low water level course 19e is selected by the course selection switch, and the start switch 19b is pressed, the amount of the laundry 9 is first detected by the cloth amount sensor 71 as described above. To detect. After that, the control device 19 controls the water supply valve 18 to start water supply, and according to the amount of the laundry based on the signal from the water level sensor 17b, the laundry is washed to an extremely low water level Hc at which the laundry is roughly immersed in half the water. Supply water to tank 5. This water level Hc is set to a low water level in advance by an experiment, for example, 50 to 80
Set to mm. At such an extremely low water level, laundry 9
Does not float in the wash water and the laundry is always the rotor 6
Holds contact with.

When the water supply is completed, the washing process starts. At this time, all the upper openings are on the washing water surface 8a.

When washing is started, for example, the rotor 6 is moved to 10
Rotate clockwise for 0.5 seconds at a speed of 0-200 rpm, followed by a pause of 0.1 seconds, then rotate at a speed similar to right rotation for 0.5 seconds of a left rotation, followed by a pause of 0.1 seconds. The control device 19 controls the drive motor 11 so as to repeat the operation for 15 minutes. This repetitive operation is different from that at the high and low water levels described above. The ratio of rotation / rest is increased from 1.4 at high and low water levels to 5. When the rotary blade 6 rotates, the back blade 6
a also rotates together, and the washing water between the washing tub 5 and the outer tub 3 is sucked between the back blade 6a and the bottom of the washing tub 5 through the suction port 8a opened in the center of the hub 7. Back blade 6a
Is pushed out by the centrifugal pump action by the rotation of.

Then, the water guiding openings 22a, 22b, 22
c, 22d to headrace 39a, 39b, 39c, 39d
Through the washing water circulation paths 21a, 21b, 21c, 21d, and intermittently ejects from the discharge openings 25a, 25b, 25c, 25d into the washing tub 5. The water level in the washing tub 5 rises and the water level of the washing water between the outer tub 3 and the washing tub 5 lowers by the amount of the water jetted into the washing tub 5. The washing water 8 is provided between the return hole 27 densely provided on the wall surface near the bottom of the washing tub 5 and the bottom return hole 28 provided on the bottom surface of the washing tub 5 around the rotary wing 6 or the gap between the rotary wing 6 and the washing tub. It passes through and returns to between the outer tub 3 and the washing tub 5, and circulates as shown by the arrow in the figure.

The height of the discharge openings 25c and 25d is
It is determined by the definition of a small amount and the bath ratio. The water level is determined by determining the small amount and the bath ratio. If the water level is not higher than this level, the sprayed washing water will not spread sufficiently.
Therefore, the height of the discharge openings 25c and 25d may be higher than the water level by 20 mm or more. There is no particular upper limit, and the height may be the same as that of the discharge openings 25a and 25b, but if the height is too high, the jet of the washing water 8 tends to weaken,
It is desirable to set the water level up to about 50 mm.

In addition to this water level as a reference, as a simple method, since the small amount is about 1/4 of the rated value, the height is 1/4 of the rated water level or 1 of the height of the discharge openings 25a and 25b. It may be based on / 4. That is, the height is higher than either of these heights and is the same as the height of the discharge openings 25a and 25b, and preferably higher than either of these heights by about 20 mm to 50 mm.

In this embodiment, even when the water level is extremely low, there is a return hole 28 at the bottom of the washing tub, and like the low water level, a large amount of washing water can be applied to the laundry 9 on the surface of the washing water over a wide range. Therefore, the penetration of washing water into the laundry is promoted, and the detergency is improved. In the dry state, about half of the laundry that has been exposed above the surface of the washing water, the entire part that gets wet and sinks below the surface of the water increases in a short time after the start of washing. Further, since the portion above the water surface is wet with the washing water, the washing effect of the washing water can be effectively utilized.

Further, in this case, the laundry does not float on the water surface and is always in contact with the rotary blades 6, so that the mechanical force directly acting on the laundry 9 by the rotary blades 6 increases, so that it is higher than that at high and low water levels. Further, the cleaning power is improved. Further, as described above, since the rotation / pause time ratio is increased, the mechanical energy applied within the same washing time is also increased, and the cleaning power is improved as compared with the case of high and low water levels. Furthermore, the effect that the discharged washing water can press the laundry from above can be expected, and the mechanical action of the rotary blades 6 can be further improved and the washing power can be improved.

As described above, mud stains on white socks and collar sleeve stains on shirts, which were difficult to remove at high and low water levels, can be removed cleanly.

The washing water from the discharge opening 25b is collected by the lint catching net 36 to collect the lint released from the laundry contained therein, and then falls into the washing tub. As a result, even at such an extremely low water level, the attachment of lint to the laundry can be prevented, and a clean finish can be achieved.

In the above description, high, low and extremely low water levels are designated by the course selection switch, but if the accuracy of the cloth amount sensor 71 is high, the course and water level may be automatically determined based on the cloth amount. . However, it is preferable to provide this course selection switch because the course of the extremely low water level is different from the dirt on the laundry and the washing method.

In this embodiment, the wash water circulation paths 21a, 21
b, 21c, 21d, 21a and 21b face each other, 21c and 21d face each other, and 21a and 2a center around the rotation axis of the washing tub.
1c is provided at an angle of 90 degrees. This is to prevent the member of the cover forming the wash water circulation path from being imbalanced and fixed in the washing tub due to its arrangement. Covers made of the same material and having the same height are made to face each other for balance. Further, at this time, the wash water circulation paths 21a and 21c are arranged at an angle of 90 degrees in order to obtain the water-conducting opening area of each cover widely and symmetrically on the circumference. It is also possible to change the angle by changing the material of the cover to achieve balance.

In the description of this embodiment, there are four washing water circulation paths in total, but the number is not limited to this. For example, a total of eight heights up to the upper balancer may be four pairs, and a height up to the middle may be two pairs total of four.

FIG. 23 shows a second embodiment of the present invention. This is a cross-sectional view taken along the line AA in FIG. 1, in which the water guiding opening area is different between the first and second covers and the third and fourth covers. In the previous embodiment, since the water guiding openings are all the same, in the case of low water level and extremely low water level, the discharge amount of washing water is larger in the discharge openings 25c, 25d than in the discharge openings 25a, 25b due to the difference in the head. Therefore, the water guide opening 22a,
The area of 22b was made larger than that of the water guide openings 22c and 22d, and the difference in the head was corrected. As a result, it is possible to obtain substantially the same amount of jetted water at all the discharge openings even when the water level is low or extremely low.

In order to increase the amount of water jetted from the discharge opening 25d in which the lint collecting net is installed, the area of the water guiding opening 22b may be further increased. In this way, the amount of lint collected can be further increased. In this way, the amount of water to be circulated and discharged can be freely set by the area of the water guide opening in accordance with the function of using the discharge opening.

The bottom return hole 28 is not provided in FIG. If the return holes 27 can be arranged sufficiently densely on the lower side surface of the washing tub 5 and the total area of the return holes under the water surface can be 50 cm ² or more, the bottom return hole 28 is not necessary.

FIG. 24 shows a third embodiment of the present invention. This is a transverse cross-sectional view taken along the line AA of FIG. 1, and conversely to the second embodiment, the water guiding opening area of the first and second covers is set to the third,
It is smaller than the water-conducting opening area of the cover of No. 4.
In this embodiment, the discharge from the first and second discharge openings is stopped when the water level is low or extremely low. Due to the synergistic effect of a large head and a small water transfer opening area, the first and second circulating water volumes decrease and the discharge stops. Of course, when the water level is high, the first and second circulating water volumes are set to be sufficient for jetting. In this case, at low water level and ultra low water level, the washing water ejected from the third and fourth discharge openings collides with the center of the washing tub and the washing water 8 is evenly distributed over the entire surface of the washing tub 5.
Can be applied.

FIG. 25 shows a plan sectional view at the positions of the third and fourth discharge openings and the jetting direction of washing water in this embodiment. A guide for regulating the jetting direction of the jetted washing water is provided in the discharge opening to regulate the jetting direction of the washing water and prevent the jetted water flow from colliding at the center. The jet water flow from the third discharge opening jets left toward the center of the washing tub, and the jet water flow from the opposing fourth discharge opening also jets left toward the center of the washing tub. As a result, the washing water can be evenly applied to the entire surface of the washing tub 5.

FIG. 26 is a vertical sectional view showing a fourth embodiment of the present invention. In this embodiment, the same symbols as those in FIG. 1 indicate the same things. Similar to the first embodiment, the washing water circulation passage 21 is formed on the inner peripheral side wall surface of the washing tub 5 around the washing tub rotating shaft.
a and 21b face each other, 21c and 21d face each other, and 21a
And 21c are provided at an angle of 90 degrees. Washing water circuit 2
1a, 21b, 21c and 21d are formed by the inner peripheral side wall surface of the washing tub 5 and the covers 20a, 20b, 20c and 20d. The return holes 27 are evenly arranged on the side surface of the washing tub. Reference numeral 45 denotes a lower balancer, which is an essential part of the present invention. Like the upper balancer 16, the lower balancer 45 is a separate component from the washing tub 5, and is provided around the rotary blade 6 at the bottom of the washing tub 5. The chamber in the bottom balancer 45 is divided into two parts, and fluid is enclosed in each of them to reduce the shake of the washing tub 5 due to the balancing action of the fluid at the time of dehydration.

In the first embodiment in which the return holes 27 at the bottom of the washing tub are made dense and the bottom return holes 28 are provided at the bottom of the washing tub as well, there is a problem in the strength of the washing tub and the number cannot be increased so much. In other words, if the number of return holes is increased too much, the rigidity of the lower part of the washing tub is lowered, the deformation and vibration of the tub are increased due to the high speed rotation during dehydration, and noise is generated. The present embodiment solves this problem, and provides another means for returning sufficient washing water to the back blade even if the return hole is the same as the conventional one.

FIG. 27 shows a rotary blade 6 taken along the line DD in FIG.
FIG. 28 is a cross-sectional view showing the state where FIG. 28 is removed in FIG.
It is a longitudinal cross-sectional view along a line. The details of the configuration of the lower balancer 45 and the circulation path will be described below with reference to FIGS. 27 and 28. 46,
Reference numeral 47 denotes a room partitioned by walls into which liquids such as salt water (not shown) are inserted. In addition, the same room has a water conduit 39 that follows the water conduit openings 25a, 25b, 25c, 25d.
It is also provided in the lower part of a, 39b, 39c, 39d so that the entire circumference is in communication. 48 is the lower balancer 4
Steps 48a, 48b, 48c, 48 provided on the inner circumference of
Reference numeral d denotes a step portion provided on the upper wall surface of the water conduit, which constitutes a labyrinth in combination with a step portion 49 provided on the outer circumference of the rotary blade 6, and reduces the leakage of the washing water 8 from the same portion.

Reference numeral 50 denotes a return passage formed between the inner wall and the bottom of the washing tub 5 by the protrusions 51 provided on the outer circumference and the bottom of the lower balancer 45, and inside the washing tub 5 when the back blade 6a is operated. The washing water is directly introduced from the bottom of the bottom wall 52 and is supplied to the central portion of the back blade 6a. Alternatively, as shown in FIG. 39, the return passage 50 penetrates the outside of the washing tub 5,
The washing water from the return hole 27 may be sucked from the water suction port 24 to the back blade 6a.

FIG. 29 is an elevation view of the cover 20a, FIG. 30 is an elevation view of the cover 20b, and FIG. 31 is the covers 20c and 20d.
Shows an elevation view of. The difference from the cover of FIGS. 5 to 7 is that steps 48a, 48b, 48c and 48d provided on the upper wall surface of the headrace are provided.
Is provided.

FIG. 32 shows the covers 20a, 20b, 20c,
It is the figure which looked at lower balancer 45 from the upper part in the state where 20d was removed. In the figure, 53a, 53b, 53c, 53d are side walls 34a, 34b of the water conduits of the cover forming the circulation path,
Walls where the outsides of 34c and 34d meet, 54a and 54b,
54c and 54d are headraces 39a, 39b, 39c and 39.
It is a bottom surface that forms a water conduit in combination with the water conduit upper wall surfaces 35a, 35b, 35c, 35d of the covers 20a, 20b, 20c, and 20d that form d. Further, as described above, the protrusion 51 forms the return passage 50 between the lower balancer 45 and the inner wall surface of the washing tub 5 in the recess when the lower balancer 45 is provided at the bottom of the washing tub 5. Further, the protrusion 51 also protrudes to the lower portion as shown in the FF sectional view of FIG.
A return passage is also formed between the bottom and the bottom. 34 and 35
Are cross-sectional views taken along line GG and HH of FIG. 32, respectively. On the other hand, the rooms 46 and 47 of the lower balancer 45 communicate with each other all around, and the lower part of the water conduit 39 is reduced to communicate with the other as shown in FIG.

At the time of washing, some of the washing water in the washing tub is returned to the return hole 2
It returns from 7 to between the outer tub 3 and the washing tub 5, and reaches the back blade 6a through the water inlet 24. In the case of low water level or ultra low water level, since there are few return holes 27 under the surface of the washing water, most of the washing water flows from the return passage 50 to the back blade 6a. Then, due to the centrifugal pump action of the back blades 6a, the water is jetted from the respective water guide openings to the washing tank through the water guide path and the circulation path.

Since the operation of the washing process at each water level is the same as that of the first embodiment, its explanation is omitted.

With the arrangement of the return holes 27 as described above, the number of the return holes 27 opened below the surface of the washing water 8 is extremely small. Therefore, only the returning holes 27 correspond to the washing water corresponding to the pumping ability of the back blade 6a. 8 cannot be supplied sufficiently. However, in the present embodiment, the outer peripheral portion of the lower balancer 45,
Also, since the washing water 8 can be sucked also from the return passage 50 formed between the protrusion 51 provided on the bottom and the washing tub 5, the necessary and sufficient washing water 8 corresponding to the pumping capacity of the back blade 6a can be obtained. Can be supplied. That is, the return passage 50 plays a role of increasing the density of the return holes in the lower portion of the washing tub and the bottom return hole of the bottom of the washing tub in the first embodiment.
Further, by providing the lower balancer 45, it is possible to further improve the shake of the washing tub at the time of dehydration.

Further, the bottom of the washing tub 5 is a simple flat surface which does not require the complicated molding with the unevenness as in the first embodiment, and the strength can be increased by providing the lower balancer here. .

In terms of manufacturing, the assembly time of the washing machine can be shortened as compared with the method of installing the lower balancer on the outer wall of the washing tub. Assemble the washing tub 5 in the outer tub 3 first.
Then, the lower balancer 45 is fitted into the bottom of the washing tub 5, and then four covers 20a, 20b, 20c, 20d that form a circulation path with the inner wall surface of the washing tub are attached to the lower balancer 4.
5. Fit it in place on the inner wall of the washing tub and fix it. Then, the rotary blade 6 is fixed to the double output shaft 6c with the screw 6b.
As described above, there is also an advantage that the assembling work is simplified in terms of manufacturing.

FIG. 36 shows a fifth embodiment, in which a small projection 60 for preventing foreign matter inflow is provided at the entrance of the return passage 50. Since the return passage 50 of the third embodiment has a wide inlet, there is a risk that a button or the like will be caught in it during washing. Therefore, in this embodiment, the small protrusion 60 is used to divide the inflow port. Reference numeral 61 in the figure denotes an inlet formed by the small protrusion 60. FIG. 37 shows the cross-sectional shape of the portion where the small protrusion 60 is provided. Not only the irregularities formed by the small protrusions 60, a large number of small holes for preventing foreign matter inflow may be provided at the entrance of the return passage 50, for example.

[0096]

As described above, according to the present invention, since the means for ejecting the washing water downward from the horizontal is provided in the washing tub, the washing water can be sufficiently sprinkled. Further, since the means for ejecting washing water of different heights is provided, it is possible to obtain an effect according to the amount of laundry. When the water level is high, the lower spraying means can promote circulation of the laundry, and when the water level is low or extremely low, the washing water is applied to the laundry in two stages to prevent the washing water from floating and It also promotes the penetration of.

Since a return hole having a sufficient total area and a bottom return hole or a return passage around the lower balancer are arranged below the surface of the washing water in the washing tub, a circulation path leading to the height of the upper end of the washing tub and It is possible to secure a sufficient circulation flow rate of the washing water by the pumping action of the back blades in the circulation path that reaches the height of the central portion of the washing tub. Then, a sufficient amount of washing water can be jetted into the washing tub from the discharge opening of each circulation path.

Therefore, when the water level is high, water is sprayed over a wide range from the discharge opening at the upper part of the washing tub, so that the washing water floating on the surface of the washing water can be sprayed with the washing water over a wide area.
The washing power is improved by promoting the penetration of washing water into the laundry. Further, a large amount of lint contained in the wash water can be collected by the lint collection net provided in another discharge opening. Furthermore, the washing water is jetted downward from the horizontal from the discharge opening submerged in the washing water. This creates a water flow in the washing tub that directs the laundry downwards, i.e. towards the rotor. The laundry is pushed by this water flow and touches the rotor blades, and the rotation causes the laundry to be twisted and gathered in the central portion, and sequentially moves to the washing water surface. In other words, the laundry in the wash water is promoted to move upward on the rotary wing shaft and downward along the wall surface of the washing / dehydrating tub so that the upper and lower parts are interchanged. The increased friction of the blades improves the cleaning power.

Further, in the case of a low water level, there are sufficient return holes and bottom return holes under the surface of the washing water, and the washing water jetted into the washing tub immediately passes through the return holes and is discharged between the outer tub and the washing tub. Since there is no shortage of washing water to be supplied to the back blade pump, the circulating water amount does not decrease, and a wide range of water is sprayed from the third and fourth discharge openings in the center of the washing tub, so it floats on the surface of the washing water. It is possible to apply a wide range of washing water to the washed laundry.
Further, although the water force is inferior to that of the lower discharge opening than that of the lower discharge opening, the wash water is jetted downward from the horizontal. That is, the washing water falls on the laundry that floats above the surface of the washing water like a two-tiered waterfall, promoting the penetration of the washing water into the laundry and improving the washing power. Further, a large amount of lint contained in the wash water can be collected by the lint collection net provided in another discharge opening. With the lower balancer, the washing water spouted into the washing tub immediately returns to the space between the outer tub and the washing tub through the return passage. Erupted.

In addition, in the case of extremely low water level, there is a bottom return hole in the bottom of the washing tub, and in the case where the lower balancer is arranged, there is a return passage. Water can be sprinkled, which promotes the penetration of washing water into the laundry and improves the detergency. Furthermore, in this case, the laundry does not float on the surface of the water, always comes into contact with the rotor blades, and the mechanical force exerted by the rotor blades directly on the laundry increases,
Detergency is further improved compared to high and low water levels.

Further, the collecting net provided in one of the upper discharge openings collects the lint released from the laundry contained in the circulating wash water. As described above, the amount of circulating washing water can be high not only at high water level but also at low water level and extremely low water level, so that a large amount of lint can be collected.

[Brief description of drawings]

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

FIG. 2 is a cross-sectional view taken along the line AA in FIG.

FIG. 3 is a vertical cross-sectional side view taken along line BB in FIG.

4 is a vertical cross-sectional side view taken along the line C-C in FIG.

FIG. 5 is an elevation view of the cover 20a according to the first embodiment.

FIG. 6 is an elevational view of a cover 20b according to the first embodiment.

FIG. 7 is an elevational view of covers 20c and 20d of the first embodiment.

FIG. 8 is a cross-sectional view taken along line KK and line LL in FIG.

FIG. 9 is a plan view of a washing tub.

FIG. 10 is an electrical connection block diagram of the fully automatic washing machine.

FIG. 11 is a structural diagram of a water level sensor.

FIG. 12 is an electrical connection diagram of a water level sensor.

FIG. 13 is a diagram showing the relationship between the oscillation frequency of the water level sensor and the water level.

FIG. 14 is a diagram showing a water level at high water level, movement of laundry, circulation and discharge of washing water.

FIG. 15 is an electrical connection diagram of the cloth amount sensor.

FIG. 16 is an operation timing chart of the cloth amount sensor.

FIG. 17 is a diagram showing the relationship between the output pulse time interval of the cloth amount sensor and the cloth amount.

FIG. 18 is a diagram showing a water level at low water level, movement of laundry, circulation and discharge of washing water.

FIG. 19 is a diagram showing a relationship between a head and a circulation flow rate.

FIG. 20 is a diagram showing a relationship between a circulation flow rate and a total opening area of return holes.

FIG. 21 is a diagram showing the relationship between the circulation flow rate and the area of the water conduit opening.

FIG. 22 is a diagram showing a water level, movement of laundry, circulation and discharge of washing water at an extremely low water level.

FIG. 23 is a transverse sectional view showing a second embodiment of the fully automatic washing machine according to the present invention.

FIG. 24 is a transverse sectional view showing a third embodiment of the fully automatic washing machine according to the present invention.

FIG. 25 is a view showing a cross section of third and fourth discharge openings of the third embodiment and directions of jet water flows.

FIG. 26 is a vertical sectional side view showing a fourth embodiment of the fully automatic washing machine according to the present invention.

27 is a cross-sectional view taken along the line DD in FIG.

28 is a vertical cross-sectional side view taken along the line EE in FIG. 27.

FIG. 29 is an elevation view of the cover 20a according to the fourth embodiment.

FIG. 30 is an elevational view of the cover 20b according to the fourth embodiment.

FIG. 31 is an elevational view of covers 20c and 20d of the fourth embodiment.

FIG. 32 is a plan view of a lower balancer.

FIG. 33 is a vertical sectional view taken along the line FF in FIG. 32.

34 is a vertical sectional view taken along the line GG in FIG. 32.

FIG. 35 is a vertical cross-sectional view taken along the line HH in FIG. 32.

FIG. 36 is a plan view showing a fifth embodiment of the fully automatic washing machine according to the present invention.

37 is a vertical sectional view taken along the line I-I in FIG. 36.

FIG. 38 is a schematic view of a conventional fully automatic washing machine.

FIG. 39 is a vertical cross-sectional side view taken along line EE in FIG. 27.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Outer frame, 2 ... Lid, 3 ... Outer tank, 3a ... Drainage port, 3b ... Tank cover, 4a ... Buffer member, 4b ... Hanging bar, 5 ... Washing / dewatering tank, 6 ... Rotor blade, 6a ... Back blade , 6b ... screw, 6c,
6d ... Output shaft, 7 ... Hub, 8 ... Wash water, 8a ... Water surface, 9
… Laundry, 10… Drive base, 11… Drive motor, 1
1a ... condenser, 12 ... conduction device, 13 ... belt, 1
4 ... Drain valve, 15 ... Drain hose, 16 ... Upper balancer, 17a ... Air chamber, 17b ... Water level sensor, 17c ... Tube, 17d, 17e ... Cylindrical body, 17f ... Rubber film, 1
7g ... projection, 17h ... coil, 17i ... ferrite core, 17j ... spring, 17k ... capacitor, 17l ... oscillation circuit, 17m ... inverter, 18 ... water supply valve, 18a
... Water supply port, 19 ... Control device, 19a ... Microcomputer, 19b
... Start switch, 19c, 19d, 19e ... Course selection switch, 19f ... Indicator, 19g ... Driving circuit, 1
9ga, 19gb ... Bidirectional 3-terminal thyristor, 20
a, 20b, 20c, 20d ... cover, 21a, 21
b, 21c, 21d ... Circulation path, 22a, 22b, 22
c, 22d ... Water guide opening, 24 ... Water inlet, 25a, 25
b, 25c, 25d ... Discharge opening, 27 ... Dewatering hole / washing water return hole, 28 ... Bottom surface dewatering hole / washing water return hole, 34a,
34b, 34c, 34d ... Side wall of water conduit, 35a, 35
b, 35c, 35d ... Head wall upper wall surface, 36 ... Collection net, 37 ... Frame, 38 ... Groove, 39a, 39b, 39c, 3
9d ... Headrace 40a, 40b, 40c, 40d ... Wall,
41a, 41b, 41c, 41d ... bottom of washing tub, 45 ...
Lower balancer, 46, 47 ... Room, 48, 48a, 48
b, 48c, 48d, 49 ... Step portion, 50 ... Return passage, 5
DESCRIPTION OF SYMBOLS 1 ... Protrusion, 52 ... Bottom wall, 53a, 53b, 53c, 5
3d ... Wall, 54a, 54b, 54c, 54d ... Bottom surface, 6
0 ... Small protrusion, 61 ... Suction port, 71 ... Cloth amount sensor, 71
a, 71b ... resistor, 71c ... photocoupler, 71d ... inverter, 101 ... outer tub, 102 ... washing tub, 103a,
103b, 103c, 103d ... Circulation path, 104a, 1
04b ... Discharge opening part, 105 ... Collection net, 106 ... Return hole.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yosuke Nagano, 502 Jinritsucho, Tsuchiura-shi, Ibaraki Prefecture, Hiritsu Manufacturing Co., Ltd.Mechanical Research Institute (72) Shiro Obayashi 502, Jinritsucho, Tsuchiura-shi, Ibaraki, Nitate Manufacturing Co., Ltd. Inside the Mechanical Research Institute (72) Inventor Mitsuyuki Togashi 502 Jinritsucho, Tsuchiura City, Ibaraki Prefecture Hiritsu Seisakusho Co., Ltd. Inside the Mechanical Research Laboratory (72) Inventor Tamotsu Kamori 1-1-1 Higashitagacho, Hitachi City, Ibaraki Hitachi, Ltd., Electrical Appliances Division (72) Inventor, Toshikazu Kamano 1-1-1, Higashi-Taga-cho, Hitachi, Ibaraki Prefecture Stock Company Hitachi Ltd., Electrical Appliances Division, (72) Inventor, Kyoichi Sugano, Hitachi-shi, Ibaraki 1-1-1, Hitachi Ltd. Electric Appliances Division

Claims (10)

[Claims] 1. A washing / dehydrating tub housed in a water receiving tub, rotary blades rotatably arranged on the inner bottom of the washing / dehydrating tub, and the same rotation as the rotary wing on the back surface of the rotary wing. In a fully automatic washing machine comprising a back blade and a drive device for reversing and rotating the rotary blade, a first flow path forming means extending on the inner wall surface of the washing / dehydrating tub to extend above the washing / dehydrating tub, A second automatic flow passage forming means extending to a position lower than that of the first flow passage forming means, and a discharge opening portion downward from the horizontal is provided above each of the first flow passage forming means. Washing machine. 2. A washing / dehydrating tub housed in a water receiving tub, rotary blades rotatably arranged on the inner bottom of the washing / dehydrating tub, and the same rotation as the rotary wing on the back surface of the rotary wing. In a fully automatic washing machine comprising a back blade and a drive device for reversing and rotating the rotary blade, a first flow path forming means extending on the inner wall surface of the washing / dehydrating tub to extend above the washing / dehydrating tub, Second flow path forming means extending to a position higher than ¼ of the rated water level of the washing / dehydrating tank and lower than the first flow path forming means are provided, and the second flow path forming means is provided above each flow path forming means. A fully automatic washing machine having a downward discharge opening. 3. A washing / dehydrating tub housed in a water receiving tub, rotary blades rotatably arranged on the inner bottom of the washing / dehydrating tub, and the same rotation as the rotary wing on the back surface of the rotary wing In a fully automatic washing machine including a back blade and a drive device that reversely rotates the rotary blade, a first flow path forming means extending on the inner wall surface of the washing / dehydrating tub to extend above the washing / dehydrating tub, And a second flow path forming means extending to a position higher than a height of ¼ of the first flow path forming means and lower than the first flow path forming means, and above the respective flow path forming means. A fully automatic washing machine characterized in that a discharge opening is provided downwardly from the horizontal. 4. The fully automatic washing machine according to claim 1, wherein two of the first flow path forming means face each other, and two of the second flow path forming means also face each other. A fully automatic washing machine in which the flow path forming means are arranged at intervals of 90 degrees. 5. The fully automatic washing machine according to claim 1, wherein the water guiding opening of the first flow path forming means and the water guiding opening of the second flow path forming means are provided. Fully automatic washing machine with different areas. 6. The fully automatic washing machine according to any one of claims 1 to 4, further comprising: a flow passage forming means having a collecting net at a discharge opening of the first flow passage forming means, A fully automatic washing machine characterized in that the area of the water guiding opening of the flow path forming means is different from the area of the water guiding opening of the other flow path forming means. 7. The fully automatic washing machine according to any one of claims 1 to 6, wherein a wash water return hole is provided on a side surface of the washing / dehydrating tub, preferably also on a bottom surface, and the side surface return hole is provided. A fully automatic washing machine, characterized in that it is densely provided at a position lower than the second flow path forming means than at a position higher than the second flow path forming means. 8. The fully automatic washing machine according to any one of claims 1 to 6, wherein a balancer is provided around a rotary blade at a bottom portion of the washing / dehydrating tub, and the washing / dehydrating tub around the rotary blade is provided. A fully automatic washing machine characterized in that a wash water return passage is provided between the balancers. 9. The fully automatic washing machine according to any one of claims 1 to 6, wherein a balancer is provided around a rotary blade at the bottom of the washing / dehydrating tub, and a washing water conduit is provided directly above the balancer. Fully automatic washing machine characterized by the provision of. 10. A washing / dehydrating tank housed in a water receiving tank,
A rotary vane rotatably arranged on the inner bottom of the washing / dehydrating tank,
A fully automatic washing machine including a back blade that rotates in the same direction as the rotary blade on a back surface of the rotary blade, and a drive device that reversely rotates the rotary blade. A fully automatic washing machine, characterized in that a flow passage forming means is provided and the flow rate of the washing water discharged from the discharge opening is 50 to 80 liters per minute.