WO2011030540A1

WO2011030540A1 - Drum type washing machine

Info

Publication number: WO2011030540A1
Application number: PCT/JP2010/005497
Authority: WO
Inventors: 菊川　智之; 縄間　潤一; 大山　眞; 村尾　剛
Original assignee: パナソニック株式会社
Priority date: 2009-09-09
Filing date: 2010-09-08
Publication date: 2011-03-17
Also published as: CN102482835A; US20120167639A1; EP2476793B1; TW201114972A; EP2476793A4; CN102482835B; EP2476793A1

Abstract

A drum type washing machine comprises: a rotating drum having a first opening on the front surface side thereof and formed in a closed-bottomed cylindrical shape; a water tub having a second opening which corresponds to the first opening and having the rotating drum mounted therein in such a manner that the direction of the rotation axis thereof is horizontal or tilted downward from the front surface side thereof toward the rear surface side thereof which is the bottom of the rotating drum; a motor for rotating and controlling the rotating drum; and a water circulation path for circulating wash water, which is located within the water tub, by causing the wash water to flow out to a circulation path, which is connected to the water tub, and then to flow into the rotating drum by means of a circulation pump. The water circulation path comprises a water conduit which allows the wash water to flow therethrough, a discharge opening which is provided to the water conduit and discharges the wash water, and a conduit which communicates with the discharge opening and discharges into the rotating drum the wash water discharged from the discharge opening. The water conduit is configured by a front end wall of the water tub and a cover which is mounted to the front end wall of the water tub, and the discharge opening is formed between the cover and the front end wall of the water tub.

Description

Drum washing machine

The present invention provides a rotating drum formed in a bottomed cylindrical shape in a water tank so that the direction of the rotation axis is horizontal or inclined downward from the horizontal direction from the front side having an opening toward the back side as the bottom. The present invention relates to a drum-type washing machine for installing and washing laundry stored in a rotating drum by rotationally driving the rotating drum.

Such a drum-type washing machine having a circulation function for circulating the washing water in the water tank with a circulation pump is already known (for example, Patent Documents 1 and 2).

In Patent Document 1, the injection into the rotating drum by the circulation means is performed from a plurality of injection ports formed by changing the angle little by little from the front surface side of the rotating drum to the center side of the rotating drum, and a high-capacity target. The processed product is efficiently cleaned.

According to Patent Document 2, the pump casing of the circulation pump has two discharge ports that switch discharge according to the forward and reverse rotation of the pump impeller, so that the washing water when washing and rinsing according to the forward and reverse rotation of the rotary drum is performed. The direction of the application changes.

However, since the water circulation technique disclosed in Patent Document 1 is attached on the packing on the front surface of the drum or between the front door and the drum, the laundry in the rotating drum is caught and the laundry is damaged.

Further, in the water circulation technologies disclosed in Patent Documents 1 and 2, the water guide path from the discharge of the pump to the discharge port is constituted by a hose. For this reason, an increase in members such as a countermeasure member for ensuring reliability against unbalance vibration of the rotating drum caused by unevenness of clothes, etc. due to clothes, etc. during washing, rinsing, and dehydration, vibration insulation failure, and the like have occurred.

Japanese Patent Laid-Open No. 10-127978 JP 2008-073128 A

The present invention relates to a drum-type laundry having a high detergency by increasing the efficiency of discharging the circulating water from the circulation pump to the clothes in the rotating drum in order to circulate the water in the water tank by the circulation pump. The realization of the machine is provided with a simple and reliable configuration.

A drum-type washing machine according to the present invention includes a rotary drum having a first opening on the front side and formed in a bottomed cylindrical shape, a second opening corresponding to the first opening, and a rotary drum. Connected to the aquarium with a water tank installed so that the rotation axis direction is horizontal or inclined downward from the horizontal direction from the front side to the bottom side, a motor that controls the rotation of the rotating drum, and the washing water in the water tank And a water circulation path for circulating the wash water by flowing out into the circulation path and flowing into the rotary drum by a circulation pump. The water circulation path includes a water conduit through which the wash water flows, a discharge port that is provided in the water conduit and discharges the wash water, and a flow path that communicates with the discharge port and discharges the wash water discharged from the discharge port into the rotary drum. Prepare. The water conduit is constituted by a front end wall of the water tank and a cover attached to the front end wall of the water tank, and the discharge port is constituted by the cover and the front end wall of the water tank.

According to the drum type washing machine of the present invention, the discharge port is configured between the cover and the inner wall of the water tank, so that the laundry in the rotating drum can be rotated without the discharge port having a special shape and structure. It becomes possible to spray onto the laundry in the drum, and it is possible to perform highly efficient cleaning by spraying without damaging the laundry.

1 is a cross-sectional view showing a schematic structure of a drum-type washing machine according to Embodiment 1 of the present invention. FIG. 2A is a cross-sectional view of a circulation pump used in the drum type washing machine in Embodiment 1 of the present invention. FIG. 2B is a side view of the circulation pump used in the drum type washing machine in Embodiment 1 of the present invention. FIG. 3A is a perspective view of a main part of a water tub of the drum type washing machine according to Embodiment 1 of the present invention. FIG. 3B is a plan view of the front wall of the water tank of the drum-type washing machine according to Embodiment 1 of the present invention as seen from the inside. FIG. 4 is a cross-sectional view of the vicinity of the water conduit of the water circulation path of the drum type washing machine according to Embodiment 1 of the present invention. FIG. 5A is a cross-sectional view of the vicinity of the discharge port of the water circulation path of the drum type washing machine according to Embodiment 1 of the present invention. FIG. 5B is a cross-sectional view of the vicinity of another outlet of the water circulation path of the drum-type washing machine according to Embodiment 1 of the present invention. FIG. 6 is a front view showing a state of jetting the washing water of the drum type washing machine in the first embodiment of the present invention. FIG. 7 is a plan view of the front wall of the water tank of the drum type washing machine according to Embodiment 1 of the present invention as seen from the inside. FIG. 8A is a cross-sectional view of the vicinity of the discharge port of the water circulation path of the drum type washing machine according to Embodiment 1 of the present invention. FIG. 8B is a cross-sectional view of the vicinity of another outlet of the water circulation path of the drum type washing machine in the first embodiment of the present invention. FIG. 9A is a plan view of the front wall of the water tub of the drum type washing machine according to Embodiment 1 of the present invention as seen from the inside. FIG. 9B is a plan view of the front wall of the water tank of the drum type washing machine according to Embodiment 1 of the present invention as seen from the inside. FIG. 10A is a cross-sectional view of the water conduit near the rectifier of the water circulation path of the drum type washing machine in the first embodiment of the present invention. FIG. 10B is a cross-sectional view of the water guide channel and the cover in the vicinity of the rectifying unit and the discharge port of the drum type washing machine in the first embodiment of the present invention. FIG. 11A is a cross-sectional view of the vicinity of the discharge port of the water circulation path of the drum type washing machine according to Embodiment 2 of the present invention. FIG. 11B is a cross-sectional view of the vicinity of another outlet of the water circulation path of the drum type washing machine in the second embodiment of the present invention. FIG. 12 is a cross-sectional view of the vicinity of the discharge port of the water circulation path of the drum type washing machine in Embodiment 3 of the present invention. FIG. 13 is a cross-sectional view of the vicinity of the discharge port of the water circulation path of the drum type washing machine in the fourth embodiment of the present invention. FIG. 14A is an enlarged cross-sectional view of the vicinity of the discharge port of the water circulation path of the drum type washing machine in the fifth embodiment of the present invention. FIG. 14B is an enlarged cross-sectional view of the vicinity of another outlet of the water circulation path of the drum type washing machine in the fifth embodiment of the present invention. FIG. 15 is a cross-sectional view of the vicinity of the discharge port of the water circulation path of the drum type washing machine in the sixth embodiment of the present invention. FIG. 16 is a cross-sectional view of the vicinity of the water conduit of the water circulation path of the drum type washing machine in the seventh embodiment of the present invention. FIG. 17 is a cross-sectional view of the vicinity of the water conduit of the water circulation path of the drum type washing machine in the eighth embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1 is a cross-sectional view showing a schematic structure of a drum-type washing machine according to Embodiment 1 of the present invention. FIG. 2A is a cross-sectional view of a circulation pump used in the drum type washing machine according to the first embodiment of the present invention. FIG. 2B is a side view of the circulation pump used in the drum-type washing machine according to Embodiment 1 of the present invention. FIG. 3A is a perspective view of a main part of the water tub of the drum type washing machine according to Embodiment 1 of the present invention. FIG. 3B is a plan view of the front wall of the water tank of the drum-type washing machine according to Embodiment 1 of the present invention as viewed from the inside. FIG. 4 is a cross-sectional view of the vicinity of the water conduit of the water circulation path of the drum type washing machine according to the first embodiment of the present invention. FIG. 5A is a cross-sectional view of the vicinity of the discharge port of the water circulation path of the drum-type washing machine according to Embodiment 1 of the present invention. FIG. 5B is a cross-sectional view of the vicinity of another outlet of the water circulation path of the drum type washing machine of Embodiment 1 of the present invention. FIG. 6 is a front view showing a state of jetting the washing water of the drum type washing machine according to the first embodiment of the present invention. FIG. 7 is a plan view of the front wall of the water tub of the drum type washing machine according to the first embodiment of the present invention as seen from the inside. FIG. 8A is a cross-sectional view of the vicinity of the discharge port of the water circulation path of the drum-type washing machine according to Embodiment 1 of the present invention. FIG. 8B is a cross-sectional view of the vicinity of another outlet of the water circulation path of the drum-type washing machine according to Embodiment 1 of the present invention. FIG. 9A is a plan view of the front wall of the water tub of the drum type washing machine according to the first embodiment of the present invention as seen from the inside. FIG. 9B is a plan view of the front wall of the water tub of the drum-type washing machine according to Embodiment 1 of the present invention as viewed from the inside. FIG. 10A is a cross-sectional view of the water conduit near the rectification unit of the water circulation path of the drum-type washing machine according to Embodiment 1 of the present invention. FIG. 10B is a cross-sectional view of the water conduit and the cover in the vicinity of the rectifying unit and the discharge port of the drum-type washing machine according to Embodiment 1 of the present invention.

The drum type washing machine of the present embodiment automatically controls the motor 6, the water supply system 7, the drainage system 8, and the drying system 9 shown in FIG. 1 according to mode setting and control programs, and at least a cleaning process, a rinsing process, and a dehydrating process. A drum-type washing and drying machine having a function of performing a drying process. However, the drying system 9 can be omitted. In addition to the above, a function of preventing the premature dissolution or bias of the detergent by circulating the wash water in the water tank 3 in the water circulation path 16 as necessary at the time of the cleaning preparation process, the cleaning process, the rinsing process, etc. It also has the function of improving the functions of washing and rinsing.

In addition, the water supply system 7 can supply water in a timely manner as indicated by solid arrows by opening and closing a solenoid valve (not shown). Moreover, the detergent of a detergent accommodating part (not shown) can be thrown into the water tank 3 at appropriate time using water supply. The drainage system 8 can drain the water in the aquarium 3 by opening and closing the drain valve 19 as indicated by the dashed arrow when necessary, such as at the end of the cleaning process or at the end of the rinsing process. Further, the water circulation path 16 repeatedly sucks the washing water in the water tank 3 by the circulation pump 20 and returns it to the water tank 3 through the discharge side path 16b.

The mode such as the driving course and various functions are selected by inputting from the operation panel 21 provided at the upper front of the washing machine body 2. The control system 22 controls the display unit on the operation panel 21 based on information input to the operation panel 21 and transmits information to the user through various displays. When the operation start is set by the input setting unit on the operation panel 21, data from a water level detection unit or the like that detects the water level in the water tank 3 is input to the control system 22 to start driving. The control system 22 controls the operations of the drain valve, the water supply valve, etc., and performs operations such as cleaning, dehydration, and drying.

Note that a main body opening 2b is provided on the front side of the washing machine main body 2 (left side in FIG. 1). The laundry can be taken in and out of the rotary drum 4 through the second opening 13 provided on the front side of the water tank 3 and the first opening 54 provided on the front side of the rotary drum 4. An opening / closing door 5 is provided in the main body opening 2b. By opening and closing the open / close door 5, the second opening 13 of the water tank 3 can be sealed and opened via the sealing material 14 attached to the rim of the second opening 13.

The drive mode of the rotating drum 4 includes a forward / reverse arc rotation drive mode and a forward / reverse continuous rotation drive mode. The forward / reverse arc rotation drive mode is a mode in which the rotating drum 4 is repeatedly repeatedly switched between a sudden forward arc rotation and a sudden reverse arc rotation at a rotation angle exceeding 90 degrees and less than 180 degrees. In the forward / reverse continuous rotation drive mode, the laundry that is lifted by the rotation of the rotary drum 4 is rotated at a rotational speed such that its own weight exceeds the centrifugal force generated by the rotation of the rotary drum 4. It is a mode that repeats alternately.

In the cleaning process or the cleaning process and the rinsing process, the forward / reverse arc rotation drive mode and the forward / reverse continuous rotation drive mode are alternately executed. In the forward / reverse arc rotation drive mode, the rotary drum 4 is arc-rotated and suddenly braked at a rapid speed in a range of rotation angles exceeding 90 degrees and less than 180 degrees. Thereby, the laundry can be lifted to a rotation angle exceeding 90 degrees and less than 180 degrees. In addition, it is possible to reliably achieve that the laundry is peeled off from the inner surface of the rotary drum 4 due to its inertia and its own weight by the sudden braking at the final stage of lifting the laundry and dropped to the side opposite to the lifting side. Therefore, it is possible to give a particularly high unraveling action to laundry that is sufficiently swollen and loosened and contains slippery water. Moreover, since the mechanical force can be exerted on the laundry, the cleaning performance can be enhanced. Furthermore, by alternately repeating the forward and reverse arc rotations in the forward and reverse directions of the arc rotation drive, the lifting position and the falling position of the laundry can be alternately switched in the left and right in each arc rotation drive. it can. As a result, the lifting action can be further enhanced while preventing the laundry from becoming entangled. In addition, since the number of times that the mechanical force is exerted on the laundry can be increased, the cleaning performance can be improved. Moreover, the entanglement of the laundry which arises when a washing | cleaning and a rinsing process progress can be suppressed by a high unraveling effect | action. Therefore, it is possible to continuously execute effective tapping in the forward / reverse arc rotation drive mode, thereby enhancing the cleaning effect and the rinsing effect.

However, in the forward / reverse arc rotation drive mode alone, tangling, twisting, wrinkles, etc. of the laundry are reduced, while the vertical position of the laundry is difficult to change, and the laundry at the bottom of the rotating drum 4 is difficult to move. For this reason, unevenness of laundry tends to occur, but these can be improved by using the forward / reverse continuous rotation drive mode together. In other words, the forward / reverse continuous rotation drive mode can change the position of the laundry in the vertical direction and reduce tangling, twisting, and wrinkling of the laundry. Moreover, the imbalance of mechanical force application to the laundry in the forward / reverse arc rotation drive mode can be reduced. That is, two different behaviors can be given to the laundry being rinsed and rinsed by both the forward / reverse arc rotation drive mode and the forward / reverse continuous rotation drive mode. Specifically, depending on the forward / reverse arc rotation drive mode, the laundry is given a firm hand-washing behavior while reducing tangling, twisting, and wrinkling of the laundry. On the other hand, depending on the forward / reverse continuous rotation drive mode, the laundry is washed continuously while moving the laundry largely while reducing unevenness, thereby giving the laundry an effective washing behavior against uniform and strong soiling.

The circulation pump 20 is fixed to the base plate 2a. A discharge side path 16b from the circulation pump 20 in the water circulation path 16 extends toward the front of the washing machine body 2 where the second opening 13 of the water tank 3 is located. Specifically, as shown in FIGS. 2A and 2B, the circulation pump 20 has an impeller 20a housed in a resin pump casing 20b. The opening side of the pump casing 20b is applied to the bearing partition 20d1 at the front end of the motor casing 20d of the circulation motor 20c, and is integrated with the motor casing 20d. Thereby, the impeller 20a is directly connected to the motor shaft 20e. The circulation pump 20 formed in this way is fitted on a resin mounting seat 35.

The water circulation path 16 discharges the wash water discharged from the discharge port 55d through the discharge port 55d, the discharge port 55d provided in the conduit and discharging the wash water, and the discharge port 55d. And a flow path 52. As shown in FIGS. 3A and 3B, the lower half of the front end wall 3h of the water tub 3 is formed in a substantially Y shape and bulges to the front side of the washing machine main body (outside, front side in FIG. 3A). The bulging part 3a which was made is formed. A cover 55 having substantially the same outer shape as the bulging portion 3a is attached to the inner surface of the front wall 3h by fastening screws or the like with the packing 55a interposed therebetween from the inner side of the bulging portion 3a. . Thereby, the water guide path 55b is formed by the bulging portion 3a and the cover 55. Therefore, the water conduit 55 b is arranged to extend in the left-right direction (left-right direction when viewed from the front side of the washing machine main body) toward the first opening 54 of the rotary drum 4.

One end of a connecting portion 51 extending in the lateral direction is connected to the lower end portion of the bulging portion 3 a, and the other end of the connecting portion 51 is connected to the discharge side route 16 b of the water circulation route 16. Thereby, wash water can be made to flow in into the water guide path 55b from the discharge side path | route 16b.

The cover 55 also serves as a cover for the connection space 51a of the connecting portion 51 between the piping from the circulation pump 20 (discharge side path 16b) and the water conduit 55b. In this way, the cover 55 also serves as a cover for the connection space 51a of the connecting portion 51, so that the position and structure restrictions of the connecting portion 51 generated due to design factors and mold structural factors can be easily solved. It becomes possible.

Further, a notch portion 55c having no sealing structure as shown in FIGS. 5A and 5B is formed at the left and right upper end portions of the cover 55 formed in a substantially Y shape. Thereby, a discharge port 55d having an opening extending in the circumferential direction region is formed between the notch portion 55c and the back surface (inward surface) of the front end wall 3h of the water tank 3 corresponding thereto. The discharge ports 55d are respectively arranged at the left and right end portions with respect to the perpendicular to the installation surface passing through the center of the first opening 54 of the rotary drum 4 in the water conduit 55b.

The washing water pressurized by the circulation pump 20 flows into the water conduit 55b from the connecting portion 51 through the discharge side passage 16b of the water circulation passage 16. The washing water that has flowed into the water guide channel 55b is sprayed from the discharge port 55d between the back surface (inward surface) of the front end wall 3h of the water tub 3 and the outer surface of the front end wall 4b of the rotary drum 4 at a position facing it. . The washing water is discharged into the rotating drum 4 through a flow path 52 formed between the back surface (inward surface) of the front end wall 3 h of the water tank 3 and the outer surface of the front end wall 4 b of the rotating drum 4.

As shown in FIG. 5A, the discharge port 55d opens in the direction of the rotation center axis of the rotary drum 4, specifically, toward the annular injection port 53 in the flow path 52. Therefore, the wash water ejected from the discharge port 55d is efficiently discharged from the flow path 52 to the rotation center axis side of the rotary drum 4, specifically toward the injection port 53 in the radial direction inside the rotary drum 4. The Therefore, it is possible to efficiently supply washing water regardless of the amount of laundry.

Further, the front end wall 3h is provided with an inclined surface 3h1 inclined toward the rear side of the washing machine body 2 from the position corresponding to the discharge port 55d toward the inner peripheral direction of the washing machine. Further, the inclined surface 3h1 has a guide surface 56 that is inclined and extended toward the first opening 54 side of the rotary drum 4 from an end portion on the inner side (right side in FIG. 5A) of the washing machine. As a result, as shown in FIG. 5A, the wash water sprayed into the flow path 52 is caused to follow the guide surface 56 from the inclined surface 3 h 1, and from the spray port 53 through the first opening 54 of the rotary drum 4. It can be discharged toward the back side. Thereby, the supply efficiency to the laundry of washing water can be improved.

Here, as shown in FIGS. 5A and 5B, guide surfaces 56 and 57 having different inclination angles are provided for the plurality of discharge ports 55d, respectively. For example, as shown in FIG. 5A, the inclination angle of the guide surface 56 corresponding to the discharge port 55d on the left side (right side in FIG. 3B) when viewed from the front of the branched water conduit 55b is α, and as shown in FIG. 5B. Furthermore, the inclination angle of the guide surface 57 corresponding to the right discharge port 55d (left side in FIG. 3B) when viewed from the front of the water conduit 55b is β, and α> β. The inclination angle here refers to an angle between the inclined surface 3h1 and the guide surface 56 or the guide surface 57. With this configuration, as shown in FIG. 6, washing water (arrow a shown in FIG. 5A) from the left-side injection port 53 as viewed from the front is injected in a relatively upward direction like the shower shape A. Is done. On the other hand, the washing water (arrow b shown in FIG. 5B) from the right injection port 53 as viewed from the front is injected downward from the shower shape A like the shower shape B. That is, the wash water sprayed from the respective discharge ports 55 d flows along the guide surfaces 56 and 57 having different inclination angles, and is sprayed from the spray port 53 into the rotary drum 4 through the first opening 54. Therefore, it is possible to realize injection with different injection angles with respect to the rotation center axis of the rotating drum 4.

Here, the inclination angle described above also affects the way in which the injection into the rotating drum 4 spreads. When the inclination angle is small (for example, in the case of the configuration shown in FIG. 5B), the washing water that has flowed along the inclined surface 3 h 1 is suddenly generated on the guide surface 57 in the vicinity where the angle changes from the inclined surface 3 h 1 to the guide surface 57. The angle changes. Therefore, the washing water collides with the guide surface 57. In this state, a flow extending in the circumferential direction (direction along the flow path 52) is generated along with the flow along the inclination direction of the guide surface 57 (for example, the flow in the direction of arrow a in FIG. 5A). Thereby, it becomes the jet of the washing water which has the breadth in the circumferential direction in a washing machine. That is, as shown in FIG. 6, with respect to the shower shape A of the washing water sprayed from the left jet port 53 whose tilt angle is α, the tilt angle is β (having a relationship of α> β as described above). The shower shape B of the washing water injected from the right injection port 53 is an injection having a spread in the circumferential direction. According to the test results of the inventors, the washing water is greatly spread and diffused up to an inclination angle of around 120 degrees, and when it is 130 degrees or more, it becomes a film-like jet with a small spread.

Further, as shown in FIG. 7, by changing the opening width of the discharge port 55d, it is possible to realize different injection widths and flow rates of the washing water from the respective discharge ports 55d. In FIG. 7, the discharge width 55d on the left side (left side in FIG. 7) has an opening width D1 and the discharge width 55d on the right side (right side in FIG. 7) has an opening width D2. D1> D2).

Note that the opening width of the discharge port 55d is not limited to D1 and D2, and can be set as appropriate.

With such a configuration, the jets having different widths and flow rates are generated from the discharge port 55d, and along the guide surface 56, the rear side of the rotary drum 4 passes through the first opening 54 of the rotary drum 4 from the jet port 53. Washing water is discharged toward the bottom surface of the rotating drum. Therefore, it is possible to provide an optimal flow rate and spread angle of the washing water according to the capacity of the laundry. Therefore, it is possible to enhance the cleaning effect, and it is possible to efficiently supply the cleaning water to the clothing, thereby realizing water saving.

Further, as shown in FIGS. 8A and 8B, the discharge port 55d opens in a predetermined circumferential direction range toward the rotation center axis side of the rotary drum 4. The flow rate of the injection is determined by the width of the opening of the discharge port 55d in the rotation axis direction (for example, D3 in FIG. 8A, D4 in FIG. 8B, D3 <D4). Therefore, by setting the width of the opening of the discharge port 55d in the direction of the rotation axis to two or more types, it is possible to realize injection with different flow rates of washing water from the respective injection ports 53.

Further, as shown in FIG. 9A, the opening direction (arrow c) of the discharge port 55d1 on the right side (right side in FIG. 9A) toward the washing machine main body is a predetermined angle ξ with respect to the rotation center axis o of the rotary drum 4. It is shifted upward. As a result, the discharge center (arrow c) from the discharge port 55d1 is discharged with a predetermined angle ξ shifted from the rotation center axis o of the rotary drum 4. Therefore, the injection center (arrow c) from the injection port 53 is injected with a predetermined angle ξ with respect to the rotation center o of the rotary drum 4. The guide surface 56 is formed in an annular shape around the rotation center o of the rotary drum 4. For this reason, even if the cross-sectional shape of the guide surface 56 through which the washing water jetted from the discharge port 55d1 passes is the same, the opening direction of the discharge port 55d1 is more gradually shifted from the rotation center o of the rotary drum 4. Since it becomes easy to spread in the circumferential direction, it becomes possible to realize injection with a large spread angle.

The discharge center (arrow d) of the discharge port 55d on the left side (left side in FIG. 9A) toward the washing machine main body is configured to open toward the rotation center axis o of the rotary drum 4. By comprising in this way, the injection of the wash water of the injection shape which spreads from right and left each discharge outlet 55d and 55d1 is realizable.

Further, as shown in FIG. 9B, the discharge port 55d2 on the left side (left side in FIG. 9B) toward the washing machine main body has the opening direction (arrow e) of the discharge port 55d2 as the rotation center axis of the rotary drum 4. The guide portion 65 may be provided so as to be shifted upward by a predetermined angle σ with respect to o. Thus, the discharge center (arrow e) from the discharge port 55d2 is discharged with a predetermined angle σ shifted from the rotation center axis o of the rotary drum 4. For this reason, the center of injection (arrow e) from the injection port 53 is ejected by a predetermined angle σ with respect to the rotation center axis o of the rotating drum 4. The guide surface 57 is formed in an annular shape around the rotation center axis o of the rotary drum 4. Therefore, the cross-sectional shape of the guide surface 57 through which the washing water sprayed from the discharge port 55d2 passes is angled from the rotation center o of the rotary drum 4 even if the cross-sectional shape of the guide surface 57 with respect to the rotation center axis is the same. Since it becomes so gentle that it becomes easy to expand in the circumferential direction, it is possible to realize injection with a large expansion angle.

Further, as shown in FIGS. 9A, 9B, 10A, and 10B, a rib that overlaps with the discharge port 55d in the washing water flow direction is provided in the vicinity of the downstream side of at least one discharge port 55d in the water conduit 55b. 66 is provided on the cover 55. In general, when the rib 66 is not provided, the washing water flowing along the water conduit 55b is discharged from the discharge port 55d, and is affected by the velocity component in the longitudinal direction of the water conduit 55b. There is a tendency for the discharge to have an angle in the longitudinal direction of the water conduit 55b with respect to the opening direction of the portion 65. In the first embodiment, as described above, the rib 66 that overlaps the discharge port 55d in the washing water flow direction is provided in the vicinity of the discharge port 55d in the water conduit 55b (upstream side of the discharge port 55d). . Therefore, when the washing water flowing along the water conduit 55b collides with the rib 66, the longitudinal velocity component of the water conduit 55b discharged from the discharge port 55d is suppressed. As a result, it is possible to discharge at a predetermined angle in the direction opened from the discharge port 55d, and it is possible to realize stable injection with a predetermined large divergence angle.

According to the above configuration, the spray angles from the plurality of spray ports 53 to the rotation center axis of the rotary drum 4 of the wash water are made different, and the spread of the wash water from the respective spray ports 53 is also made different. it can. Thereby, it becomes possible to provide the optimal washing water injection angle corresponding to a low-capacity or high-capacity laundry.

For example, it is assumed that when the laundry at the start of cleaning is bulky without containing the cleaning liquid, the vicinity of the left injection port 53 shown in FIG. 6 is blocked in the circumferential direction by the laundry. Even in such a case, the spray having a large spread is performed from the right injection port 53 toward the vicinity of the first opening 54 of the rotary drum 4 toward the washing machine body, and the laundry near the injection port 53 is wetted early. By reducing the volume, it is possible to eliminate blockage in the vicinity of the left injection port 53 caused by the laundry.

Further, from the left injection port 53 shown in FIG. 6, the expansion is small toward the center axis direction of the rotating drum 4, and the injection toward the back direction of the rotating drum 4 is performed, so that the large expansion from the right injection port 53 is performed. The laundry in the back part from the vicinity of the center of the rotating drum 4 which is difficult to wet by the jet having the can also be wetted at an early stage. Thereby, while improving the effect of washing water, the volume of the laundry can be reduced by making the washing water soak into the laundry in the back part from the vicinity of the center. Therefore, since the laundry easily moves in the rotating drum 4 at an early stage, the tapping effect is improved. In addition, the washing water can be jetted from the gap formed by reducing the volume of the laundry to the entire laundry, and the cleaning effect can be synergistically increased.

Due to the above effects, the cleaning liquid can be used effectively regardless of the amount of laundry in the rotating drum 4. Further, since the discharge port 55d is in a position where it does not come into contact with the laundry in the rotary drum 4, the laundry is caught and disturbs the behavior required for washing, rinsing, drying, etc., or the laundry is damaged or torn. This can be prevented. Moreover, the appearance which looks good is not spoiled. The washing water injection effect is further enhanced by a combination of the behavior of the laundry that is switched up and down in the forward / reverse continuous rotation drive mode and the behavior of the laundry that is switched between the left and right in the forward / reverse arc rotation drive mode.

In addition, in this Embodiment 1, although the discharge port 55d was made into two places of the right and left of the water conduit 55b, it cannot be overemphasized that it has the same effect even if it is three or more places.

In addition, although there is one water conduit 55b in the present embodiment, a configuration including a plurality of water conduits 55b is also possible.

Moreover, the structure provided with the some water conduit 55b and the discharge port 55d, and branched from the circulation pump 20 and connected to the connection part 51 of each water conduit 55b may be sufficient.

(Embodiment 2)
FIG. 11A is a cross-sectional view of the vicinity of the discharge port of the water circulation path of the drum-type washing machine according to Embodiment 2 of the present invention. FIG. 11B shows a cross-sectional view of the vicinity of another outlet of the water circulation path of the drum-type washing machine in Embodiment 2 of the present invention. About the same structure as Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

As shown in FIGS. 11A and 11B, the guide surfaces 58 and 59 are curved, and the guide surfaces 58 and 59 have different curvature radii with respect to the left and right discharge ports 55d, respectively. For example, as shown in FIG. 11A, the curvature radius of the guide surface 58 corresponding to the discharge port 55d on the left side (right side in FIG. 3B) when viewed from the front of the branched water conduit 55b is γ. Further, as shown in FIG. 11B, the curvature radius of the guide surface 59 corresponding to the right discharge port 55d (left side in FIG. 3B) when viewed from the front of the water conduit 55b is assumed to be δ, and γ> δ. As a result, as shown in FIG. 6, the wash water (arrow f shown in FIG. 11A) from the left injection port 53 as viewed from the front is injected relatively upward like the shower shape A. On the other hand, the wash water (arrow g shown in FIG. 11B) from the right injection port 53 as viewed from the front is injected downward from the shower shape A as in the shower shape B. That is, the wash water sprayed from the respective discharge ports 55 d flows along the guide surfaces 58 and 59 having different curvature radii, and is sprayed from the spray port 53 into the rotary drum 4 through the first opening 54. Therefore, it is possible to realize injection with different injection angles with respect to the rotation axis of the rotating drum 4.

Also, the radius of curvature affects the spread of injection. When the radius of curvature is small, the angle of the washing water flowing along the inclined surface 3h1 changes abruptly due to the curvature of the guide surface 59 in the vicinity where the inclined surface 3h1 changes to the guide surface 59. Therefore, the washing water collides with the guide surface 59. In this state, along with the flow along the guide surface 59, the circumferential expansion occurs, resulting in an injection having an expansion. That is, as shown in FIG. 6, the inclination angle is δ (having a relationship of γ> δ as described above) with respect to the shower shape A of the washing water sprayed from the left jet port 53 whose curvature radius is γ. The shower shape B of the washing water sprayed from the right spray port 53 is a spray having a spread.

That is, the second embodiment can have the same operational effects as the first embodiment.

(Embodiment 3)
FIG. 12A shows a cross-sectional view of the vicinity of the discharge port of the water circulation path of the drum type washing machine in Embodiment 3 of the present invention. About the same structure as Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

As shown in FIG. 12, the inclined surface 3h1, the inclined surface 3h1, and the guide surface 61 having different inclination angles are connected by a curved surface 60. Thereby, since the wash water discharged from the discharge port 55d smoothly flows from the inclined surface 3h1 to the guide surface 61 having a different inclination angle through the curved surface 60, the injection from the injection port 53 becomes a more stable injection. .

Further, the spray angle of the wash water spray with respect to the rotation axis of the rotary drum 4 can be determined by the inclination angle of the guide surface 61, and the spray spread angle can be determined by the curved radius of the curved surface 60. Therefore, the injection angle with respect to the rotation center axis and the spread angle of injection can be individually adjusted. Accordingly, it is possible to raise the injection angle while increasing the expansion angle of the injection, or to lay down the injection angle while suppressing the expansion angle of the injection. By using two or more shapes of the curved surface 60 and the guide surface 61, it is possible to realize injections with different injection angles of the washing water from the respective injection ports with respect to the rotation axis of the rotating drum and different injection spread angles. Become.

(Embodiment 4)
FIG. 13: shows sectional drawing of the discharge port vicinity of the water circulation path | route of the drum type washing machine in Embodiment 4 of this invention. About the same structure as Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

As shown in FIG. 13, in the fourth embodiment, the guide surface is composed of surfaces having a plurality of inclination angles.

In FIG. 13, the guide surface 62 includes a surface 62a having an inclination angle ε with respect to the inclined surface 3h1, and a surface 62b having an inclination angle ζ with respect to the inclined surface 3h1. First, the inclined surface 3h1 is connected through the curved surface 60 to the surface 62a having an inclination angle ε. Thus, in the vicinity where the inclined surface 3h1 changes to the guide surface 62, the inclination angle ε is made small, and the washing water flowing along the inclined surface 3h1 is suddenly changed in angle by the guide surface 62 so as to collide with the guide surface 62. Expand the flow of washing water. The surface 62a is further connected to a surface 62b having an inclination angle ζ larger than the inclination angle ε. By providing this surface 62b, injection with a large injection angle with respect to the rotation axis of the rotary drum 4 is realized. When the difference between the inclination angle ε and the inclination angle ζ is large, and the flow of the washing water is separated from the surface 62b and the jet is unstable, a surface having an intermediate inclination angle between the surface 62a and the surface 62b. May be added to These shapes can also suppress uneven thickness in the vicinity of the

surfaces

62a and 62b. The guide surface may be constituted by a surface having a plurality of inclination angles when the injection angle with respect to the rotation axis of the rotating drum 4 is large and the injection is widened.

(Embodiment 5)
FIG. 14A is an enlarged cross-sectional view of the vicinity of the discharge port of the water circulation path of the drum type washing machine in the fifth embodiment of the present invention. FIG. 14B shows an enlarged cross-sectional view of the vicinity of another outlet of the water circulation path of the drum type washing machine in the fifth embodiment of the present invention. About the same structure as Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

As shown in FIG. 14A, the injection angle with respect to the rotation axis of the washing water rotating drum 4 is determined by an extension line or a tangential direction of the guide surface 62 in the vicinity of the first opening 54. Therefore, the injection angle may be changed by making the end portion of the surface 62b of the guide surface 62 into a chamfered shape 67 having a predetermined angle. Further, by providing the chamfered shape 67, an effect of preventing the laundry from being damaged or torn can be obtained. Similarly, the chamfered shape 67 may be a rounded shape 68 as shown in FIG. 14B.

(Embodiment 6)
FIG. 15 is a sectional view of the vicinity of the discharge port of the water circulation path of the drum type washing machine in the sixth embodiment of the present invention. About the same structure as Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

As shown in FIG. 15, inclined surfaces 64 and 64a having a plurality of inclination angles and

curved surfaces

60 and 60a in consideration of spread of injection, injection angle, injection stability, laundry damage, tearing, and uneven thickness. 60b, 60c, end portions and the like may be gradually changed. That is, by combining the guide surface, curved surface, end shape, and the like having a plurality of inclination angles shown in each of the above-described embodiments, it is possible to realize prevention of washing water jetting and laundry damage according to the purpose. be able to.

(Embodiment 7)
FIG. 16 shows a cross-sectional view of the vicinity of the water conduit of the water circulation path of the drum type washing machine in the seventh embodiment of the present invention. About the same structure as Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

In Embodiment 7 of the present invention, as shown in FIG. 16, the water guide channel 55 e is provided with a bulging portion 55 f that protrudes toward the rotating drum 4 on the cover 55. With this bulging portion 55f, the cross-sectional area of the water conduit 55e can be made larger than the cross-sectional area of the water conduit 55b shown in the first embodiment. Further, when the cross-sectional area of the water guide passage 55e is the same as that of the water guide passage 55b, it is possible to suppress the bulge amount of the bulge portion 3a to the front of the water tank 3 by providing the bulge portion 55f. Therefore, it becomes possible to realize the water circulation path 16 having a more compact and low pressure loss.

(Embodiment 8)
FIG. 17 shows a cross-sectional view of the vicinity of the water conduit of the water circulation path of the drum type washing machine in the eighth embodiment of the present invention. About the same structure as Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

In the eighth embodiment of the present invention, as shown in FIG. 17, a water conduit 55h is formed between the cover 55 and the inner wall of the water tank 3 via a welded portion 55g by vibration welding or ultrasonic welding. According to this configuration, it is possible to efficiently inject the cleaning water pressurized by the circulation pump without leakage with a simple configuration in which the fixing of the seal member or the screw is abolished, and highly efficient cleaning can be performed at low cost. It becomes possible.

The drum-type washing machine according to the present invention allows the water in the water tank to be circulated by the circulation pump, so that the laundry in the rotating drum can be discharged without an injection port having a special shape and structure. The cleaning effect can be enhanced by increasing the efficiency of discharging the circulating water to the clothes in the rotating drum without damaging it. Therefore, the rotating drum formed in the bottomed cylindrical shape is installed in the water tank so that the rotation axis direction is horizontal or inclined downward from the horizontal direction from the opening front side toward the back side as the bottom. It is useful as a drum-type washing machine or the like for washing laundry stored in a rotating drum by rotationally driving the drum.

2 Washing machine body 2a Base plate 3 Water tank 3a Swelling portion 3h Front end wall 3h1 Inclined surface 4 Rotating drum 4b Front end wall 5 Open / close door 6 Motor 7 Water supply system 8 Drainage system 9 Drying system 13 Second opening 14 Sealing material 16 Water circulation path 16b Discharge side passage 19 Drain valve 20 Circulation pump 20a Impeller

20b Pump casing

20c Circulation motor 20d Motor casing 20d1 Bearing partition 20e Motor shaft 21 Operation panel 22 Control system 35 Mounting seat 51 Connection portion 51a Connection space 52 Channel 53 Injection port 54 1 opening 55

cover

55b, 55e, 55h water conduit 55c notch 55d, 55d1, 55d2 outlet 55f bulging part 55g welded

part

60, 60a, 60b, 60c curved

surface

56, 57, 58, 59, 61, 62

Guide surface

62a,

62b Surface

64, 64a Inclined surface 65 Guide portion 66 Rib 67 Chamfered shape 68 Round shape

Claims

A rotating drum having a first opening on the front side and having a bottomed cylindrical shape, and a rear surface side having a second opening corresponding to the first opening and the rotating drum from the front side to the bottom. The water tank installed so that the rotation axis direction is horizontal or inclined downward from the horizontal direction, the motor for controlling the rotation of the rotating drum, and the washing water in the water tank flowing out to the circulation path connected to the water tank In a drum-type washing machine comprising a water circulation path for circulating the washing water by flowing into the rotating drum by a circulation pump,
The water circulation path includes a water conduit through which wash water flows, a discharge port provided in the water conduit and discharging the wash water, and the wash water discharged from the discharge port in communication with the discharge port in the rotary drum. And a flow path for discharging to
The water conduit is constituted by a front end wall of the water tank and a cover attached to the front end wall of the water tank,
The drum-type washing machine, wherein the discharge port is configured between the cover and the front end wall of the water tank.
The said discharge port is opened with respect to the said flow path in the predetermined | prescribed circumferential direction range so that the said wash water may be discharged toward the rotation center axis direction of the said rotating drum. Drum-type washing machine.
2. The drum type washing machine according to claim 1, wherein the discharge port guides the wash water from the flow path to an injection port for injecting the wash water into the rotary drum.
The injection port is formed between an outer surface of the front end wall of the rotating drum and an inner surface of the front end wall of the water tub, and the injection port allows the washing water to flow rearward in the rotating drum and in the central axis direction of the rotating drum. The drum type washing machine according to claim 3, wherein the drum type washing machine is discharged.
2. The drum type washing machine according to claim 1, wherein an inner surface of a front end wall of the water tank forming the flow path includes a curved surface that curves toward the direction of the rotating drum.
2. The drum type washing machine according to claim 1, wherein an inner surface of a front end wall of the water tank forming the flow path has an inclined surface inclined toward the direction of the rotating drum.
The drum type washing machine according to claim 1, wherein the water conduit includes a plurality of the discharge ports.
8. The plurality of discharge ports are arranged at least one each on a left side and a right side with respect to a perpendicular to an installation surface passing through a center of an opening of the rotating drum in the water conduit. Drum type washing machine.
The drum type washing machine according to claim 1, comprising a plurality of each of the water conduit and the discharge port.
The drum-type washing machine according to claim 9, wherein the plurality of discharge ports are disposed at ends in a left-right direction with respect to a perpendicular to an installation surface passing through a center of an opening of the rotating drum in the water conduit.
The position of each said discharge port with respect to the perpendicular with respect to the installation surface which passes through the center of the opening of the said rotating drum consists of at least 2 or more types, The several discharge port is characterized by the above-mentioned. The drum-type washing machine according to any one of the above.
The drum-type washing machine according to claim 1, wherein the shape of the back surface of the front end wall of the water tank in the vicinity of the plurality of discharge ports includes at least two types.
The drum type washing machine according to claim 1, wherein a bulging portion that bulges outward of the washing machine is provided on a front end wall of the water tank constituting the water conduit.
The drum-type washing machine according to claim 1, wherein the cover constituting the water conduit is provided with a bulging portion that bulges inward of the washing machine.
The drum type washing machine according to claim 1, wherein the water guide path is arranged in a circumferential direction with respect to a center of a circle formed by an opening of the rotary drum.
The drum-type washing machine according to claim 15, wherein the water conduit is disposed to extend in the left-right direction toward the opening of the rotating drum.
The drum type washing machine according to claim 1, wherein the cover covers a connection space of a connection portion between a pipe from the circulation pump to the water conduit and the water conduit.
The drum type washing machine according to claim 1, wherein the water guide channel is configured through a seal member between the cover and the inner surface of the front end wall of the water tank.
The drum type washing machine according to claim 1, wherein the water guide path is formed by welding between the cover and an inner surface of the front end wall of the water tank.