JP2008154863A - Washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a washing machine capable of cleaning the inner surface of a water storage tub and the outer surface of a washing tub. <P>SOLUTION: A plurality of blades 41 is arranged on the lower surface of a base 40a in a pulsator 40. A ring shape rear lid 42 is arranged at the lower end of the blades 41. Thus, a plurality of substantially truncated pyramid shape acceleration flow passages 43 is formed. A circulation water passage 50 is formed in a vertical direction on the inner surface of the washing tub 30. Ejector parts 90 for generating (micro bubbles) are arranged in the range of the circulation water passage 50 in a washing cylinder part 33. The circumference of the pulsator 40 is enclosed with a casing 60 excluding the discharge port 52 of the circulation water passage 50. Accordingly, washing water discharged by the rotation of the pulsator 40 is made to flow into the circulation water passage 50, and then, the washing water including the micro bubbles is sprayed toward the water storage tub 20 from spray holes 70 formed in the washing cylinder part 33. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a washing machine.

  In general, washing machines are roughly classified into a pulsator type and a drum type. The pulsator system rotates a pulsator placed in a washing tub, generates a "circulating water stream" by the rotation, and removes dirt by mechanical action such as friction or vibration and chemical action by a detergent. . And since “foam” is generated during washing, the “foam” is prevented from flowing out of the washing tub, or the “foam” flowing out of the washing tub is outside the water storage tank storing the washing tub. An invention for preventing outflow is disclosed (for example, see Patent Document 1).

JP-A-8-168589 (page 4-5, FIG. 1)

  However, in the invention disclosed in Patent Document 1, the washing water discharged by the pump-up action of the back blade provided on the back surface of the pulsator is sprayed on the washing tub so that the foam does not flow out of the washing tub. The foam is sprayed between the washing tub and the water storage tank so that the foam that flows out of the washing tub does not flow out of the water storage tank. Later, there was a problem that “dirt” adhered to the outer surface of the washing tub and the inner surface of the water storage tank, and the stain was not removed. In addition, there is a problem that dirt due to splashes of washing water is not removed.

  The present invention has been made in view of the above, and is a washing machine capable of preventing dirt from adhering to the outer surface of the washing tub and the inner surface of the water storage tank or removing the dirt even if the dirt adheres. The purpose is to provide.

A washing machine according to the present invention includes a water storage tank that can store and discharge washing water;
A washing tub stored in the water tank;
A pulsator disposed at the bottom of the washing tub;
A pump chamber formed under the base of the pulsator;
A circulation channel installed in the washing tub and communicating with the pump chamber;
A fine bubble generating means provided in the circulation channel and including fine bubbles in the wash water flowing through the circulation channel;
Have
Washing water containing fine bubbles is sprayed from the circulation channel toward the water storage tank.

  In the present invention, the “washing tub” is the same as the “dehydration / washing tub” for washing and dehydration, and “drying / dehydration” for drying (for example, when warm air is supplied). Same as "cum washing tub". Further, “washing water” refers to water used for washing, and refers to tap water, bath water, and those into which detergent is added, and is not particularly limited. In addition, washing refers to one or both of “washing” and “rinsing”.

Therefore, in the washing machine according to the present invention, since the washing water is discharged by the pump chamber formed under the base of the pulsator, it is not necessary to install a special pump, and the washing water containing fine bubbles is stored in the washing machine. Since it is injected toward the tank, the inner surface of the water storage tank is cleaned.
In particular, since the fine bubbles contained in the sprayed washing water rise in the washing water, the outer surface of the washing tub is washed at this time, and the area higher than the water surface on the inner surface of the water storage tank is contaminated by splashing of the washing water. As is easy, since the area is washed with the washing water containing the injected fine bubbles, the inner surface of the water storage tank and the outer surface of the washing tank are cleaned.

[Embodiment 1: Washing machine]
1 to 3 illustrate the washing machine according to the first embodiment of the present invention, FIG. 1 is a cross-sectional view in side view, FIG. 2 is a cross-sectional view along AA (plan view), and FIG. It is a figure (plan view). In addition, in the figure, since each structural member is shown typically, the dimension is not exact. In particular, for members formed of thin plates, the thickness is exaggerated for clarity. Moreover, the same code | symbol is attached | subjected to this same part in each figure, and a part of description is abbreviate | omitted.
In FIG. 1, the washing machine 100 executes a series of washing steps, a rinsing step, a dehydrating step, and a drying step. The washing process and the rinsing process may be collectively referred to as a “washing process”.

(Casing)
The housing 10 has a rectangular cross section (same as a substantially rectangular parallelepiped), and a top cover 11 is installed on the top surface. A housing opening 12 is formed in the top cover 11 and serves as a clothing input port for taking in and out clothing. An outer lid 12a (for example, made of a light-transmitting member such as colorless or colored transparent plastic) is installed in the housing opening 12 so as to be freely opened and closed.
In addition, brackets 14 are installed near the upper ends of the four corners of the housing side wall 13 of the housing 10, and the upper ends of the four hanging rods 19 that suspend the water storage tank 20 are locked to the bracket 14.

(Water storage tank)
1 to 3, a water tank 20 is accommodated in the housing 10. The water storage tank 20 has a cup shape with the top surface opened and the bottom surface closed, and the lower end of the suspension bar 19 is locked to the bracket 24 installed on the water tank cylindrical section 23 and is suspended by the suspension bar 19. Yes.
A water tank cover 21 is installed in an inner flange shape on the upper end surface of the water tank 20 (same as the periphery of the top surface opening). That is, the water tank cover 21 has a ring shape, and clothes are put in and taken out through the water tank opening 22 of the ring.
And the hood 15 which connects the housing | casing opening part 12 of the housing | casing 10 and the water tank opening part 22 of the water storage tank 20 is installed. Since the hood 15 has flexibility or stretchability, it deforms following the inclination of the water storage tank 20.

(Laundry tub)
The washing tub 30 is a “washing and dehydration tub” for washing, rinsing and dehydrating the clothes that have been thrown in, and a “washing and dehydrating and doubling tank for washing, rinsing, dehydrating and drying the clothes that have been thrown in. It is also called “drying tank”. The washing tub 30 is rotatably disposed in the water storage tank 20.
The washing tub 30 has a cup shape including a washing cylinder portion 33 having an open top surface and a closed bottom surface. The washing cylinder portion 33 has a plurality of water passage holes for dehydration (hereinafter referred to as “dehydration holes”). ) 34 is formed, and a balancer 32 is installed around the top opening 31. Therefore, the range surrounded by the inner periphery of the balancer 32 is used as an opening for putting in and taking out clothes.

(Pulsator)
A pulsator 40 is rotatably arranged inside the bottom surface 36 of the washing tub 30 (inside the tub). Blades 40b are formed on the upper surface of the base 40a of the pulsator 40 so as to efficiently stir the thrown-in clothes and the injected water. A plurality of blades 41 are installed on the lower surface of the base 40a in a substantially radial direction, and an annular plate (hereinafter referred to as “back cover”) 42 for connecting these blades 41 is installed at the lower ends of the plurality of blades 41. ing. Therefore, a plurality of substantially pyramid-shaped spaces (hereinafter referred to as “acceleration flow paths”) 43 partitioned by a pair of blades 41 are formed between the lower surface of the base 40 a and the upper surface of the back cover 42. .

An annular gap (hereinafter referred to as “suction port”) 45 is formed between the inner peripheral edge of the back cover 42 and the drive shaft 44 of the pulsator 40, and the suction port 45 is formed on the bottom surface 36 of the washing tub 30. Opposing openings (hereinafter referred to as “circulation ports”) 35 are formed.
Therefore, when the pulsator 40 is rotated in a state of being submerged in water, the water in the acceleration flow path 43 is blown outward in the radial direction by centrifugal force, so that the water stored at the bottom of the water storage tank 20 It passes through the suction port 45 and is sucked into the acceleration flow path 43. At this time, since the acceleration flow path 43 is formed only by a rotating member (so-called rotor), the pumping performance (suction / suction) is higher than that formed by a rotating member and a non-rotating member (so-called rotor and stator). Excellent discharge performance).

(Circulation channel)
On the inner surface side of the washing cylindrical portion 33 of the washing tub 30, a circulating water channel 50 having a predetermined thickness (same as the radial distance) and a predetermined width (same as the circumferential distance) is provided substantially at the upper end from the bottom surface 36. Up to the vertical direction (up and down in the figure). The circulating water channel 50 is surrounded by a part of the washing cylindrical portion 33 and the circulating water channel wall 53, the upper end portion is closed by the upper lid portion 51, and an opening is formed between the bottom surface 36 of the washing tub 30 and the circulating water channel wall 53. A portion (hereinafter referred to as “discharge port”) 52 is formed. In addition, although the circulation water channel 50 has shown what was arrange | positioned three places in the circumferential direction, the quantity is not limited.

Further, a casing 60 is installed in a range excluding the circulating water channel 50 on the bottom surface 36 of the washing tub 30. That is, the outer periphery 61 of the casing 60 is connected to the washing cylindrical portion 33 and the circulating water channel wall 53, and the pulsator 40 is rotatably accommodated in the inner peripheral opening 62. Since the gap 63 between the inner periphery of the inner peripheral opening 62 and the outer periphery 46 of the pulsator 40 is narrow, when the pulsator 40 is rotated, water stored at the bottom of the water storage tank 20 passes through the circulation port 35 and the suction port 45. Then, the air is sucked into the acceleration flow path 43, passes through the discharge port 52, and flows into the circulation water channel 50.
Therefore, a pump chamber is formed by the lower surface of the pulsator 40, the blade 41, the back cover 42, and the casing 60.

An annular protrusion (precisely, a plurality of arc-shaped protrusions because it is divided by a plurality of blades 41) 47 is installed along the outer periphery 46 of the base 40a. For this reason, the flow that flows along the lower surface of the pulsator 40 in the acceleration flow path 43 is bent downward by the protrusion 47 on the outer periphery 46.
Further, the lower edge of the protrusion 47 installed on the pulsator 40 is lower than the upper edge of the discharge port 52 of the circulation water channel 50 (same as the lower surface of the circulation water channel wall 53 at the discharge port 52). For this reason, the water blown out from the acceleration channel 43 by the rotation of the pulsator 40 does not directly collide with the end surface 55 of the discharge port 52 (same as the inner peripheral surface of the circulating water channel wall 53 at the discharge port 52).
Therefore, the water blown out from the acceleration flow path 43 does not enter the washing tub 30 (or is difficult to enter) from the gap 56 between the end face 55 of the discharge port 52 and the outer periphery 46 of the pulsator 40.

Further, in the range where the circulation water channel 50 of the washing cylindrical portion 33 is formed, a plurality of through holes (hereinafter referred to as “injection holes”) 70a, 70b, 70c, 70d (hereinafter collectively referred to as “injection holes 70”) Ejector portions 90a, 90b, 90c, and 90d (hereinafter sometimes collectively referred to as "ejector portions 90") that discharge washing water containing fine bubbles are installed (hereinafter, sometimes referred to as "ejector portions 90") (see FIG. This will be explained in detail separately).
Therefore, since the washing water is jetted vigorously even toward the area where the washing water in the water tank 20 splashes, the area in the water tank 20 is washed.
In addition, although the thing in which the injection hole 70 (same as the ejector part 90) was formed four places is shown, the quantity is not limited.

(Rotary motor)
A common rotary motor 80 for rotationally driving the washing tub 30 and the pulsator 40 is installed on the bottom surface 26 of the water storage tank 20. Further, a rotation distributing means (not shown) for distributing the rotation of the rotary motor 80 to the pulsator 40 or the washing tub 30 is provided.
The rotation motor 80 and the rotation distribution means perform predetermined rotation / stop and distribution in the washing process and the dehydration process (and in the drying process), respectively, according to instructions from the control means.

(Water supply / drainage mechanism)
A water supply mechanism is installed on the top surface of the water storage tank 20 (more precisely, the lower surface side of the water tank cover 21). The water supply mechanism has a water supply path whose one end is led out of the housing 10 and connected to an external water supply, and a water supply valve installed in the middle of the water supply path to open and close the flow of water. Further, a drain outlet is formed on the bottom surface of the water storage tank 20, and a drain hose is connected to the drain outlet. In addition, the drain valve which opens and closes the distribution | circulation of water is provided in the drain outlet or the drain hose (all are not shown in figure).

(Fine bubble generation means)
FIG. 4 is a side sectional view schematically showing the fine bubble generating means installed in the washing machine shown in FIG. The ejector portion 90 is a nozzle formed in a venturi shape, and is gradually reduced in diameter, connected to the outlet of the nozzle portion 91, a throat portion 92 having the smallest inner diameter (same as the throttle portion), and a throat And a diffuser portion 93 that is connected to the outlet of the portion 92 and gradually increases in diameter.
The throat portion 92 is formed to be connected to the suction portion 94 (which covers the outlet of the nozzle portion 91 in an annular shape) that becomes negative pressure when the washing water is jetted from the nozzle portion 91 and surrounds the flow path in an annular shape. And an air supply groove (hereinafter referred to as “air introduction part”) 95 and a mixing part 96 formed continuously to the air introduction part 95.
That is, in the mixing unit 96, air is sucked into the washing water from the air introduction unit 95 and mixed by the ejector effect of the washing water (negative pressure) ejected from the nozzle unit 91.
Then, in the diffuser unit 93, the pressure is increased by diffusing the air mixed in the mixing unit 96, the air is crushed into small bubbles (micro bubbles).

5 and 6 are correlation diagrams showing the performance of the fine bubble generating means shown in FIG. 4, and the vertical axis represents the air suction flow rate and the pressure loss.
In FIG. 5, the horizontal axis represents the ratio (L3 / L1) of the flow direction length (L3) of the diffuser portion 93 to the length (L1) of the nozzle portion 91 in the flow direction. Even if the length ratio (L3 / L1) changes, the pressure loss hardly fluctuates. On the other hand, if the length ratio (L3 / L1) is less than 1, the larger the value, the more rapidly the air suction flow rate. Increase. When the length ratio (L3 / L1) is 1 or more, the air suction flow rate becomes a large value, and even if the length ratio (L3 / L1) increases thereafter, the increase in the air suction flow rate decreases. Yes. Therefore, the length ratio (L3 / L1) is desirably 1 or more.

In FIG. 6, the horizontal axis represents the ratio (A3 / A1) of the cross-sectional area (A3) of the outlet of the diffuser section 93 to the cross-sectional area (A1) of the inlet of the nozzle section 91. Even if the ratio (A3 / A1) of the cross-sectional area changes, the pressure loss hardly fluctuates. On the other hand, when the ratio is less than 0.25, the air suction flow rate decreases rapidly. Therefore, the ratio of the cross-sectional area (A3 / A1) is desirably 0.5 or more.
In addition, although the circular channel shape was described, it may be a square, a rectangle, an ellipse, or the like, and has the same effect. Further, the optimum shape of a square, a rectangle or an ellipse is the same as that of a circle.

(Laundry water spray effect)
As described above, in the washing machine 100, the washing water containing fine bubbles that have passed through the ejector portion 90 is jetted from the jet hole 70 toward the water tank cylindrical portion 23 of the water storage tank 20 by the rotation of the pulsator 40. Without installing a separate pump means, the inner surface of the water tank cylindrical portion 23 is cleaned. In particular, since the washing water is jetted also in a range higher than the water surface of the washing water, it is possible to clean the dirt due to the splashes.

7 to 9 are external views schematically showing an example of an ejector unit installed in the washing machine shown in FIG. In FIG. 7, the ejector portion 790 includes a throat portion 792 having a circular cross section, a truncated cone-shaped nozzle portion 791, and a diffuser portion 793. A circular air supply pipe 796 that supplies air toward the air introduction part formed in the throat part 792 is installed.
In FIG. 8, the ejector portion 890 has a throat portion 892 having a rectangular cross section, a nozzle portion 891 having a truncated pyramid shape, and a diffuser portion 893. A rectangular air supply tube 896 that supplies air toward an air introduction portion (slit shape) formed in the throat portion 892 is installed.
In FIG. 9, the ejector portion 990 includes a throat portion 992 having an oval cross section, a nozzle portion 991 that smoothly and continuously shrinks, and a diffuser portion 993 that gradually increases. The throat portion 992 is formed with a slit-shaped air introduction portion 995 that surrounds the throat portion 992, and an air supply pipe 996 is installed so as to surround the air introduction portion 995.

Note that the characteristics shown in FIGS. 3 and 4 are obtained in any of the ejector portion 790 (circular cross section), the ejector portion 890 (rectangular cross section), and the ejector portion 990 (cross-sectional ellipse). That is, the optimum shape of the cross-sectional circle, cross-sectional rectangle, cross-sectional ellipse, or cross-sectional ellipse is the same as that of the circular cross-section.
At this time, regardless of the cross-sectional shape, the diameter (dd1) of a perfect circle having an area equal to the cross-sectional area at the outlet of the nozzle portion and the diameter (dd3) of a perfect circle having an area equal to the cross-sectional area at the outlet of the diffuser portion It is preferable that the ratio (dd3 / dd1) of both be 0.5 or more.
Furthermore, since the cross-sectional area of the nozzle portion is liable to be clogged with dust, dust, and lint, it is set to a size that can prevent clogging and is preferably 7 mm or more in diameter. When the cross section is not a circle, it is desirable that the cross sectional area of the nozzle portion is 38.5 mm 2 (π × 72/4) or more.

(Microbubble generation means: integrated circulation channel)
10 to 12 schematically show the fine bubble generating means installed in the washing machine shown in FIG. 1, FIG. 10 is a perspective view in cross section, FIG. 11 is an external view, and FIG. 12 is a partial cross section. It is an external view.
10 to 12, the fine bubble generating means 200 is formed from an outer tub side member 200a bonded to the inner surface of the washing tub 30, and a central side member 200b bonded to the outer tub side member 200a. Circulating water channels 250a and 250b and ejector portions 290a and 290b connected to the circulating water channels 250a and 250b are formed symmetrically on the bonding surface 202a of the outer tub side member 200a and the bonding surface 202b of the center side member 200b, respectively. Yes.

In FIG. 10, on the joint surface 202b of the center side member 200b, a triangular first circulation water channel 251b that opens to the lower surface 203b and narrows upward, and a flat semicircle that communicates with the first circulation water channel 251b and goes upward. -Shaped second circulation water channel 252b and a flat semicircular second circulation water channel that is communicated with the first circulation water channel 251b and directed upward and then changed in a substantially inverted J shape or a substantially inverted U shape. 252b is formed, and the circulation water channel 250b is formed by both of them.
The end of the second circulation channel 252b is connected to the starting end of the nozzle part 291b, the nozzle part 291b is reduced in diameter as it goes downward, the throat part 292b is formed in the vertical direction, and the diffuser part 293b is enlarged in diameter as it goes downward. is doing. Then, a slit-shaped air introduction part 295b is formed so as to surround the throat part 292b, and an air distribution path 296b is provided to surround the air introduction part 295b and make the air supply to the air introduction part 295b uniform. A groove-shaped air supply path 297b for supplying outside air to the air distribution path 296b is formed in the vertical direction, and the air supply path 297b is opened in a slit shape on the upper surface 201b (the opening is connected to the air suction port 298b). Called). That is, the circulating water channel 250b is constituted by these portions.

On the other hand, a circulating water channel 250a and an ejector portion 290a are similarly formed on the joint surface 202a of the outer tub side member 200a (not shown). Each part forming these is symmetrical to each part forming the circulating water channel 250b and the ejector part 290b, and the numerals of the respective symbols are the same, and are the same as those obtained by replacing the subscript “b” with “a”. Therefore, illustration is abbreviate | omitted.
Therefore, when the joining surface 202a of the outer tub side member 200a and the joining surface 202b of the center side member 200b are brought into contact with each other and joined together, the circulating water channel 250 is formed by the circulating water channel 250a and the circulating water channel 250b, and the ejector portion 290a and the ejector. The ejector portion 290 is formed by the portion 290b (not shown).
The joined one is called the fine bubble generating means 200. In the following description, the suffixes “a, b” are omitted for the reference numerals of the joined portions.

In addition, the injection port inclined surface 210b which becomes shallow so that it becomes the joint surface 202b side is formed in the termination | terminus of the diffuser part 293b of the center side member 200b, and the outer tank side surface 204a is formed in the termination | terminus of the diffuser part 293a of the outer tank side member 200a. An injection port 220a that opens to (an opposite surface of the joint surface 202a) is opened, and a lower surface of the injection port 220a is formed with an injection port slope 210a that becomes lower (closer to the lower surface) as it approaches the outer tank side surface 204a.
Since the central-side jet nozzle slope 210b and the outer tub-side jet nozzle slope 210a form a continuous slope, the micro-bubble generating means 200 contains washing water containing fine bubbles discharged from the ejector section 290. Is guided by the injection port slopes 210b and 210a and is injected obliquely downward from the injection port 220a.

13 to 15 are cross-sectional views in side view schematically showing variations of the fine bubble generating means (integrated circulation channel) shown in FIG.
The fine bubble generating means 200 shown in FIG. 13 is the same as that shown in FIG. That is, the first circulating water channel 251, the second circulating water channel 252, and the ejector unit 290 (nozzle unit 291, throat unit (not shown), diffuser unit 293, air distribution channel 296, air supply channel 297 arranged in the vertical direction. Etc.) and an injection port 220a.
Therefore, after washing water discharged by a pulsator (not shown) flows upward, the direction is changed downward and supplied to the ejector unit 290. After washing water containing fine bubbles is sent downward, jetting (not shown) It is guided by the mouth slope and sprayed obliquely downward from the spray port 220a. Therefore, it is suitable for downward fine bubble diffusion. However, there is a pressure loss at the bent portion (R portion) of the second circulation water channel 252. Moreover, it is preferable to perform operation control of the pulsator in order to eliminate air accumulation.

In particular, when washing water containing air bubbles is sprayed in the presence of a high concentration detergent, the detergent components may be left by foaming. The gas suction characteristics of the ejector are determined by the water pressure and the flow velocity applied to the constriction. Therefore, it greatly depends on the rotational speed of the pulsator.
Therefore, if the water flow by the pulsator rotation speed in the washing process makes the ejector hardly suck in the gas, the rotation speed of the pulsator is increased in the rinsing process, and the gas is sucked in by the water flow formed at that time, the more The effect can be exhibited.
The pulsator generally performs a reversal motion, but shortening the reversal motion interval improves the efficiency of gas suction. In addition, since the efficiency strongly affects the water level in the washing tub, it is also effective to provide a mechanism for adjusting the water level.

  From the viewpoint of long-term use, it is important to prevent the clogging of the ejector, especially the gas suction part, since the diameter is small. As a countermeasure, it is effective to attach a check valve to the gas suction part. It is also effective to provide a detecting means for clogging and to output an error signal when the gas amount becomes a predetermined amount or less. It is also effective to make the nozzle or water channel structure detachable so that jams can be removed.

  In FIG. 14, in the fine bubble generating means 300, an ejector unit 290 arranged in the horizontal direction is connected to the end (upper end) of the first circulation water channel 251. Therefore, after the washing water discharged by the pulsator (not shown) flows upward, the flow direction is changed in the horizontal direction, and the washing water containing fine bubbles is guided by the slope of the injection port (not shown) and is horizontally discharged from the injection port 220a. Jetted in the direction. Therefore, it is suitable for ejecting fine bubbles over a wide range in the horizontal direction. However, since the flow bends at the end of the second circulation channel 252, it is preferable to reduce the pressure loss at the portion (for example, in an arc shape). In addition, by adjusting the inclination of the injection port slope, the washing water containing fine bubbles can be injected in a direction inclined with respect to the horizontal direction.

In FIG. 15, in the fine bubble generating means 400, an ejector portion 290 arranged in the vertical direction is connected to the end (upper end) of the first circulation water channel 251. Accordingly, the wash water discharged by a pulsator (not shown) flows upward without changing the flow direction, and the wash water containing fine bubbles is guided obliquely from the jet port slope (not shown) and obliquely upward from the jet port 220a. Jetted in the direction. Therefore, since the pressure loss of the washing water flowing into the ejector section 290 is small, the ejector effect is promoted, the amount of fine bubbles generated is increased, and the water tank 20 is suitable for injection toward a high position.
In addition, since arrangement | positioning of the ejector part 290 becomes low compared with the fine bubble production | generation means 200 and 300, when the water level of washing water is higher than the ejector part 290, when rotation of a pulsator stops (the ejector effect disappeared) In this case, the washing water may flow back to the air supply path 297. For this reason, it is preferable to install a check valve in the air supply path 297 or to perform operation control of the pulsator. In addition, by adjusting the inclination of the injection port slope, the washing water containing fine bubbles can be injected in a direction inclined with respect to the upward direction.

(Fine bubble generation means: integrated laundry tub)
16 is a cross-sectional view in plan view schematically showing a variacin of fine bubble generating means (same as the fine bubble generating means shown in FIG. 10) installed in the washing machine shown in FIG. In FIG. 16, the outer tub side member 200 a constituting the fine bubble generating means 200 is formed integrally with the washing cylindrical portion 33 of the washing tub 30. That is, the circulating water channel 250a and the ejector portion 290a are formed at three locations in the circumferential direction of the washing cylindrical portion 233, respectively, and the center side member 200b (the circulating water channel 250b and the ejector portion 290b are formed) is joined thereto. Has been. In the drawing, the description of each member is omitted for easy understanding. Further, parts not specifically mentioned are the same as the washing cylindrical part 33.
Therefore, it is not necessary to make the outer tub side member 200a a separate body and install it in the washing tub 30, so that the manufacturing is facilitated and the manufacturing cost is reduced. In addition, arrangement | positioning of the circulating water channel 250a and the ejector part 290a is not limited to three places. Further, instead of the fine bubble generating means 200, the fine bubble generating means 300, 400 may be installed as described above, or the fine bubble generating means 200, 300, 400 may be mixed.

[Embodiment 2: Washing machine]
FIG. 17 is a side sectional view for explaining the washing machine according to the second embodiment of the present invention. In FIG. 17, a washing machine 500 is obtained by tilting the water storage tank 20 of the washing machine 100 described in the first embodiment.
That is, the water storage tank 20 is hung by the front-side suspension bar 19a and the rear-side suspension bar 19b that is disposed on the front side (left side in the figure), and at the upper end of the rear-side suspension bar 19b, Hanging rod lifting means 510 (installed on bracket 14) is connected. Therefore, when the lifting rod lifting means 510 lifts the rear suspension rod 19b, the water storage tank 20 is inclined toward the front surface. Instead of the suspension rod lifting means 510, a suspension rod lowering means (installed in the bracket 24) may be connected to the lower end of the rear surface suspension rod 19b.

(Laundry water spray effect)
FIG. 18 is a partial cross-sectional view for schematically explaining the state of washing in the washing machine shown in FIG. In FIG. 18, since the water storage tank 20 of the washing machine 500 is tiltable, when washing is performed in a tilted state (the pulsator 40 is rotated), the washing water containing fine bubbles ejected from the ejection port 220 a is stored in the water storage After colliding with the inner surface of the water tank cylindrical portion 23 of the tank 20, it diffuses around. At this time, since the fine bubbles (indicated by “B” in the figure) rise in the washing water (more precisely, they move while zigzag in the turbulent flow), the outer surface of the washing cylindrical portion 33 of the washing tub 30 is also washed. Will be.
That is, in the washing machine 500, the washing performance can be improved by inclining the water storage tank 20 (same as the washing tank 30), and the water storage tank 20 and the laundry are washed by ejecting washing water containing fine bubbles. Cleaning of the tank 30 can be promoted.

  Since this invention is the above structure, since a water tank can be wash | cleaned with the wash water containing a fine bubble, it can utilize widely as a washing machine for various households and business.

Sectional drawing of the side view explaining the washing machine which concerns on Embodiment 1 of this invention. AA sectional drawing (plan view) explaining the washing machine shown in FIG. BB sectional drawing (plan view) explaining the washing machine shown in FIG. The sectional side view which shows typically the fine bubble production | generation means installed in the washing machine shown in FIG. FIG. 5 is a correlation diagram showing the performance of the fine bubble generating means shown in FIG. 4. FIG. 5 is a correlation diagram showing the performance of the fine bubble generating means shown in FIG. 4. The external view which shows typically an example of the ejector part installed in the washing machine shown in FIG. The external view which shows typically an example of the ejector part installed in the washing machine shown in FIG. The external view which shows typically an example of the ejector part installed in the washing machine shown in FIG. The perspective view which shows typically the fine bubble production | generation means installed in the washing machine shown in FIG. The external view which shows typically the fine bubble production | generation means installed in the washing machine shown in FIG. Sectional drawing which shows typically the fine bubble production | generation means installed in the washing machine shown in FIG. Sectional drawing which shows typically the variacin of the fine bubble production | generation means shown in FIG. Sectional drawing which shows typically the variacin of the fine bubble production | generation means shown in FIG. Sectional drawing which shows typically the variacin of the fine bubble production | generation means shown in FIG. Sectional drawing which shows typically the variacin of the fine bubble production | generation means shown in FIG. Sectional drawing of the side view explaining the washing machine which concerns on Embodiment 2 of this invention. FIG. 18 is a partial cross-sectional view schematically illustrating a state of cleaning in the washing machine illustrated in FIG. 17.

Explanation of symbols

 10: Housing, 11: Top cover, 12: Housing opening, 12a: Outer lid, 13: Housing side wall, 14: Bracket, 15: Hood, 19: Hanging rod, 19a: Front hanging rod, 19b: Rear surface Side hanging rod, 20: water tank, 21: water tank cover, 22: water tank opening, 23: water tank cylindrical part, 24: bracket, 26: bottom surface, 30: washing tank, 31: top surface opening, 32: balancer, 33: Washing cylindrical part, 35: Circulation port, 36: Bottom surface, 38: Cross section is 40: Pulsator, 40a: Base, 40b: Blade, 41: Blade, 42: Back cover, 43: Acceleration flow path, 44: Drive shaft, 45: suction port, 46: outer periphery, 47: protrusion, 50: circulation channel, 51: upper lid part, 52: discharge port, 53: circulation channel wall, 55: end surface, 56: gap, 60: casing, 61: outer periphery, 62: inner periphery opening, 63: gap, 70: jet Hole: 80: Rotating motor, 90: Ejector part, 91: Nozzle part, 92: Throat part, 93: Diffuser part, 94: Suction part, 95: Air introducing part, 96: Mixing part, 100: Washing machine, 200: Fine air bubble generating means, 200a: outer tank side member, 200b: center side member, 201b: upper surface, 202a: bonding surface, 202b: bonding surface, 203b: lower surface, 204a: outer tank side surface, 210a: injection port slope, 210b: Injector slope, 220a: injection port, 233: washing cylinder, 250: circulation channel, 250a: circulation channel, 250b: circulation channel, 251: circulation channel, 251b: circulation channel, 252: circulation channel, 252b: circulation channel, 290: Ejector section, 290a: Ejector section, 290b: Ejector section, 291: Nozzle section, 291b: Nozzle section, 292b: Throat section, 93: Diffuser section, 293a: Diffuser section, 293b: Diffuser section, 295b: Air introduction section, 296: Air distribution path, 296b: Air distribution path, 297: Air supply path, 297b: Air supply path, 298b: Air suction port , 300: fine bubble generating means, 400: fine bubble generating means, 500: washing machine, 510: hanging means, 600: drum-type washing machine, 610: circulation pump, 620: water piping.

Claims (13)

A water storage tank for storing and discharging washing water;
A washing tub stored in the water tank;
A pulsator disposed at the bottom of the washing tub;
A pump chamber formed under the base of the pulsator;
A circulation channel installed in the washing tub and communicating with the pump chamber;
A fine bubble generating means provided in the circulation channel and including fine bubbles in the wash water flowing through the circulation channel;
Have
The washing machine, wherein washing water containing fine bubbles is sprayed from the circulation channel toward the water storage tank.   The fine bubble generating means includes a throat portion in which a slit-like air supply groove is formed, a nozzle portion that decreases in diameter as it approaches the throat portion, a diffuser portion that increases in diameter as it moves away from the throat portion, and the washing tub The washing machine according to claim 1, further comprising an air supply path that opens to an upper portion of the air supply passage and supplies air to the air supply groove. The length of the nozzle portion in the flow direction of the wash water is L1, the length of the diffuser portion in the flow direction of the wash water is L3, the inner diameter of the inlet of the nozzle portion is d1, the inner diameter of the nozzle portion is d2, When the inner diameter of the outlet of the diffuser part is d3,
L3 / L1 ≧ 1
d3 / d1 ≧ 0.5
The washing machine according to claim 1 or 2, wherein:   The washing machine according to any one of claims 1 to 3, wherein the fine bubble generating means is formed integrally with the circulation channel. The water tank is tiltable,
The fine bubbles in the wash water containing fine bubbles dispersed toward the water storage tank inclined with respect to the vertical direction rise along the side walls of the wash tank. The washing machine as described in.   A water channel clogging detection means for detecting that the circulation of washing water is disabled in the circulation water channel is installed, and when the water channel clogging detection means detects that the flow of washing water is disabled, this is notified. The washing machine according to any one of claims 1 to 5, further comprising a water channel clogging notification unit.   An air clogging detecting means for detecting that air flow is disabled in the air supply path is installed, and when the air clogging detecting means detects that air flow is disabled, an air path for informing this is detected. The washing machine according to any one of claims 2 to 6, further comprising clogging notification means. On the side wall of the washing tub, a spray hole through which the washing water containing the fine bubbles can freely flow is formed,
The washing machine according to any one of claims 1 to 7, wherein the circulation channel is detachable from the washing tub.   The said air supply path comprises the air suction opening opened in the upper part of the said washing tub, and this air suction opening opens toward the outer surface of the said washing tub toward the downward direction. A washing machine according to any one of the above.   10. A check valve or a foreign matter catching means for preventing washing water from flowing into the air supply path when the pump means is stopped is installed in the air supply path. The washing machine according to any one of the above.   The washing machine according to any one of claims 1 to 10, wherein the diffuser portion is formed below the throat portion, and the diffuser portion has a diameter that increases downward. The pump chamber has a base of the pulsator, a plurality of blades installed on the lower surface of the base, an annular plate connecting the lower ends of the plurality of blades, and is installed in the water storage tank to freely rotate the pulsator A casing that surrounds,
The central opening of the annular plate forms a suction port for washing water, and a discharge port communicating with the circulation channel is formed in the casing. Washing machine.   The washing machine according to claim 12, further comprising a protrusion that protrudes toward the annular plate along an outer peripheral edge of a lower surface of the base of the pulsator.

Images