JP5299174B2 - Drum washing machine - Google Patents

Description

  In the present invention, a rotating drum formed in a bottomed cylindrical shape is installed 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 to the open side to the back side as the bottom. The present invention relates to a drum type washing machine for washing laundry stored in a rotating drum by rotationally driving the rotating drum.

  A drum-type washing machine having such a circulation function that circulates washing water in a water tank with a circulation pump is already known (see, 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 in which is applied changes.

JP-A-10-127978 JP 2008-073128 A

  However, since the water circulation technique disclosed in Patent Document 1 sprays a bar-shaped shower from a plurality of nozzles formed by changing the angle little by little to the nozzle, each shower becomes local and covers it. However, in recent drum-type washing machines with water-saving flow, it is necessary to circulate with a small amount of water, and there is a limit to cover with the number of spray ports.

  Further, the water circulation technique disclosed in Patent Document 2 has two discharge ports that switch discharge according to the forward and reverse rotation of the pump impeller, so that the washing water at the time of washing and rinsing according to the forward and reverse rotation of the rotary drum is provided. The direction of hanging is changed, and a shower is applied to the laundry that falls when the rotating direction of each rotating drum rotates, increasing the weight of the laundry and increasing the washing power by tapping, especially when the amount of laundry is high capacity It is not in the state of scouring, and the effect cannot be obtained.

  The main object of the present invention is to increase the efficiency of discharging the washing water in the rotating drum to the laundry in the rotating drum by the discharge side path from the circulation pump in order to circulate the washing water in the water tank by the circulation pump. It is to provide a high drum type washing machine.

In order to achieve the above object, 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, and a second corresponding to the first opening. A water tank that is installed such that the rotation axis direction is horizontal or inclined downward from the horizontal direction from the front side toward the back side that is the bottom, and a motor that controls the rotation of the rotation drum. A water circulation system that circulates the washing water in the water tank into the rotary drum by a circulation pump through a circulation path connected to the water tank, and drives the motor, the circulation pump, etc. to at least one of a washing process and a rinsing process. In the drum-type washing machine that can perform the operation, the water circulation system is provided in a water guide path provided on a front end wall of the water tank and connected to a discharge side path from a circulation pump of the circulation path. A plurality of discharge ports for discharging washing water between the front end wall back surface of the water tank and the front end wall surface of the rotating drum, and the rotating drum from between the front end wall back surface of the water tank and the front end wall surface of the rotating drum. A plurality of injection ports for injecting washing water therein, and the discharge port is provided between a front end wall rear surface of the water tub and a front end wall surface of the rotary drum toward a substantially rotation center side of the rotary drum. Opening in the circumferential direction range, the back surface of the front end wall of the water tank is provided at the peripheral end portion of the second opening, and the washing water discharged from the discharge port is inward of the rotating drum through the first opening. The washing water discharged from the discharge port flows along the back surface and the guide surface of the front end wall of the water tank and is jetted from the spray port, and has a plurality of discharge ports. The shape of is characterized by comprising two or more types .

  In such a configuration, by making at least two types of the shape of each discharge port, it becomes possible to realize injection with different spreading angles and flow rates of washing water from the respective injection ports. It is possible to provide an optimal flow rate and spread angle for each laundry, and it is possible to enhance the cleaning effect and to efficiently supply cleaning water to the clothes, thereby realizing water saving. It becomes possible.

  According to the drum type washing machine of the present invention, by making at least two types of the shape of each discharge port, it becomes possible to realize injections with different spreading angles and flow rates of washing water from the respective injection ports, It is possible to set an optimal spread angle for each of low-volume and high-volume laundry, and it is possible to enhance the washing effect and to efficiently supply washing water to clothing, thus saving water It becomes possible to do.

Sectional drawing which shows schematic structure of the drum type washing machine in Embodiment 1 of this invention (A) Cross-sectional view of the circulation pump used in the drum type washing machine (b) Side view of the circulation pump used in the drum type washing machine (A) Perspective view of the main part of the water tank of the drum type washing machine (b) Plan view of the front wall of the water tank of the drum type washing machine as seen from the inside Sectional view of the vicinity of the water conduit in the water circulation path of the drum type washing machine (A) Sectional view near the discharge port of the water circulation path of the drum type washing machine (b) Sectional view near the other discharge port of the water circulation path of the drum type washing machine Front view showing a state of washing water jet of the drum type washing machine A plan view of the front wall of the water tank of the drum type washing machine as seen from the inside (A) Sectional view near the discharge port of the water circulation path of the drum type washing machine (b) Sectional view near the other discharge port of the water circulation path of the drum type washing machine (A) The top view which looked at the front wall of the water tank of the drum type washing machine from the inside (b) The top view which looked at the front wall of the water tank of the drum type washing machine from the inside (A) Cross-sectional view of the water conduit near the rectifier of the water circulation path of the drum-type washing machine (b) Cross-sectional view of the water conduit and cover near the rectifier and the discharge port of the drum-type washing machine (A) Cross-sectional view of the vicinity of the discharge port of the water circulation path of the drum type washing machine in Embodiment 2 of the present invention (b) Cross-sectional view of the vicinity of the other discharge port of the water circulation path of the drum type washing machine Sectional drawing of discharge port vicinity of the water circulation path | route of the drum type washing machine in Embodiment 3 of this invention Sectional drawing of discharge port vicinity of the water circulation path | route of the drum type washing machine in Embodiment 4 of this invention (A) Enlarged sectional view near the discharge port of the water circulation path of the drum type washing machine in Embodiment 5 of the present invention (b) Enlarged sectional view near the other discharge port of the water circulation path of the drum type washing machine Sectional drawing of discharge port vicinity of the water circulation path | route of the drum type washing machine in Embodiment 6 of this invention

  According to a first aspect of the present invention, there is provided a rotating drum having a first opening on the front side and having a bottomed cylindrical shape, a second opening corresponding to the first opening, and the rotating drum on the front side. A water tank installed such that the rotation axis direction is horizontal or inclined downward from the horizontal direction toward the bottom side from the bottom, a motor for controlling rotation of the rotating drum, and washing water in the water tank to the water tank A drum-type washing machine comprising: a water circulation system that circulates in the rotating drum by a circulation pump through a connected circulation path, wherein the motor, the circulation pump, etc. are driven to perform at least one of a washing step and a rinsing step Are provided on the front end wall of the water tank and connected to the discharge side path from the circulation pump of the circulation path, and the washing water provided in the water supply path and the back surface of the front end wall of the water tank and the rotation A plurality of outlets for discharging between the front end wall surface of the ram, and a plurality of outlets for injecting washing water into the rotary drum from between the front end wall back surface of the water tank and the front end wall surface of the rotary drum; The discharge port is opened in a predetermined circumferential range toward the substantially rotation center side of the rotating drum between the back surface of the front end wall of the water tank and the front end wall surface of the rotating drum, and the front end wall of the water tank A back surface of the second opening has a guide surface that is provided at a peripheral end of the second opening so that the washing water discharged from the discharge port is directed inward in the rotary drum through the first opening; The washing water discharged from the discharge port flows along the back surface and the guide surface of the front end wall of the water tank, and is configured to be injected from the injection port. The shape of the discharge port includes two or more types. By using a drum-type washing machine, each injection port When the laundry at the start of washing is bulky in the state that it does not contain cleaning liquid, the vicinity of one of the injection ports is circumferentially affected by the laundry. Even if it is blocked by the other injection port, the laundry has a large spread toward the vicinity of the first opening of the rotary drum, and the laundry in the vicinity of the injection port is wetted early to reduce the volume. In addition, it is possible to eliminate the blockage in the vicinity of one of the injection ports, and further, by performing injection from the one injection port toward the inner side of the rotating drum with a small spread toward the inner side of the rotating drum, the other The laundry from the center of the rotating drum, which is difficult to get wet with the jet that has a large spread from the outlet, also wets the laundry in the back part early, increasing the effect of washing water, and the volume of the laundry in the back part from the center Soaks in the washing water and makes it easier for the laundry to move quickly in the rotating drum, improving the effect of tapping and improving the volume of the laundry from the gap created by the entire laundry. It becomes possible to inject and synergistically enhance the cleaning effect.

  In the second invention, in particular, the discharge port of the first invention opens in a predetermined circumferential direction range toward the substantially rotation center side of the rotating drum, and the circumferential width of the opening is composed of two or more kinds. By using the drum type washing machine as a feature, the flow rate of the jet and the spread angle of the jet are determined by the circumferential width of the discharge port. It is possible to realize injections in which the flow rate of washing water from the injection port and the spread angle of the injection are different.

  In the third invention, in particular, the discharge port of the first or second invention opens in a predetermined circumferential range toward the substantially rotation center side of the rotary drum, and two or more kinds of widths in the rotation axis direction of the opening. Since the flow rate of the injection is determined by the width in the rotation axis direction of the opening of the discharge port, the width of the opening in the rotation axis direction can be set to two or more types. In addition, it is possible to realize injection with different flow rates of washing water from the respective injection ports.

The fourth invention is characterized in that, in particular, at least one of the discharge ports according to any one of the first to third inventions has an opening or a guide portion having a predetermined angle with respect to the rotation center of the rotating drum. By adopting a drum type washing machine, the center of injection from the injection port is injected at an angle with respect to the rotation center of the rotating drum, and at the same time, the guide surface is formed in an annular shape around the rotation center of the rotating drum. Therefore, the cross-sectional shape of the guide surface through which the cleaning water sprayed from the discharge port passes becomes gentler as the angle from the rotation center of the rotating drum increases even if the cross-sectional shape of the guide surface with respect to the rotation center is the same. Since it becomes easy to expand in the direction, it becomes possible to realize injection with a large expansion angle.

  According to a fifth aspect of the present invention, in the vicinity of at least one upstream side of the water conduit of the discharge port according to any one of the first to fourth aspects, a rib that suppresses the velocity component of the flow of the washing water in the longitudinal direction in the water conduit. When the washing water flowing along the water channel is discharged from the discharge port, the speed component of the flow of the washing water in the longitudinal direction in the water channel is provided. By causing the ribs to collide with the ribs, it is possible to discharge at a predetermined angle from the discharge port and to realize stable injection with a large predetermined spread angle.

  According to a sixth aspect of the invention, in particular, the drum-type washing machine is characterized in that the shape of the plurality of guide surfaces according to any one of the first to fifth aspects is composed of two or more types. The injection angle of the washing water from the rotation axis with respect to the rotation axis of the rotating drum and the injection expansion angle can be realized, and the optimal injection angle and expansion angle can be provided for each of the low-capacity and high-capacity laundry. At the same time, when the laundry at the start of washing is bulky without containing the cleaning liquid, even if the vicinity of one of the injection ports is closed in the circumferential direction by the laundry, it rotates from the other injection port. By performing jetting with a large spread toward the vicinity of the first opening of the drum and prematurely wetting the laundry in the vicinity of the injection port to reduce the volume, it is possible to eliminate blockage in the vicinity of one injection port by the laundry. The In addition, a rotating drum that has a small expansion toward the central axis direction of the rotating drum from one of the injection ports, and is difficult to get wet by an injection having a large expansion from the other injection port by performing injection toward the back of the rotating drum. Laundry from the center of the back is also wetted early, increasing the effectiveness of the washing water, and the volume of the laundry from the back of the center is reduced by soaking in the washing water, so that the laundry can be quickly brought into the rotating drum. Therefore, it is possible to improve the washing effect by synergistically improving the washing effect, and by spraying the entire laundry from the gap formed by reducing the volume of the laundry.

  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. 2 (a) is a cross-sectional view of a circulation pump used in the drum type washing machine, and FIG. 2 (b). Fig. 3A is a side view of a circulation pump used in the drum type washing machine, Fig. 3A is a perspective view of a main part of the water tank of the drum type washing machine, and Fig. 3B is a water tank of the drum type washing machine. FIG. 4 is a cross-sectional view of the water circulation path in the vicinity of the water circulation path of the drum type washing machine, and FIG. 5A is a discharge port of the water circulation path of the drum type washing machine. FIG. 5 (b) is a cross-sectional view of the vicinity of another outlet of the water circulation path of the drum type washing machine, FIG. 6 is a front view showing a state of washing water injection of the drum type washing machine, and FIG. 7 is a plan view of the front wall of the water tank of the drum type washing machine as viewed from the inside, and FIG. 8A is a view of the vicinity of the discharge port of the water circulation path of the drum type washing machine. FIG. 8B is a sectional view of the vicinity of another outlet of the water circulation path of the drum type washing machine, and FIG. 9A is a plan view of the front wall of the water tank of the drum type washing machine as viewed from the inside. FIG. 9 (b) is a plan view of the front wall of the water tank of the drum type washing machine as seen from the inside, FIG. 10 (a) is a cross section of the water conduit near the rectifying part of the water circulation path of the drum type washing machine. FIG. 10 (b) shows 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.

The drum type washing machine according to the first embodiment automatically controls the motor 6, the water supply system 7, the drainage system 8, and the drying system 9 shown in FIG. A so-called drum-type washing and drying machine having a function of performing a process and a drying process is configured. However, the drying system 9 can be omitted. In addition to the above, washing water in the water tub 3 is circulated in the water circulation system 16 in the water circulation system 16 to prevent the premature dissolution and bias of the detergent as necessary, such as during the washing preparation process, the washing process, and the rinsing process. It also has a function to improve the function.

  Note that the water supply system 7 can supply water in a timely manner as indicated by solid arrows by opening and closing the electromagnetic valve, and the water supply can be used to supply the detergent in the detergent container into the water tank 3 in a timely manner. The drainage system 8 can be drained as indicated by a one-dot chain line arrow when necessary, such as at the end of the washing process or at the end of the rinsing process, by opening and closing the drain valve 19. The circulation system 16 repeatedly sucks the washing water in the water tank 3 by the circulation pump 20 and returns it to the water tank 3.

  The mode such as the driving course and various functions are selected by inputting from the operation panel 21 provided in the upper front portion of the washing machine body 2, and the control system 22 displays on the display means on the operation panel 21 based on the input information. In addition to informing the user, when the start of operation is set by the input setting means on the operation panel 21, data is input from the water level detecting means for detecting the water level in the water tank 3, and driving is started. Controls the operation of the drain valve, water supply valve, etc., and performs operations such as cleaning, dehydration, and drying.

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

  The driving of the rotating drum 4 is lifted by the forward / reverse arc rotation driving mode in which the rotating drum 4 repeats the sudden forward arc rotation and the sudden reverse arc rotation exceeding 90 degrees and less than 180 degrees alternately and the rotation of the rotating drum 4. A forward / reverse continuous rotation drive mode in which continuous rotation of the rotating drum 4 at a rotational speed showing a behavior of falling from a height where the weight of the laundry falls is reversed forward and backward, and a washing step or a washing step; In the rinsing step, the forward / reverse arc rotation drive mode and the forward / reverse continuous rotation drive mode are alternately executed. Accordingly, the laundry is lifted up to more than 90 degrees and less than 180 degrees by the arc rotation and rapid braking of the rotating drum 4 exceeding 90 degrees and less than 180 degrees, and the final lifting of the laundry Since the braking state occurs due to the sudden braking of the stage, the laundry can be reliably peeled off from the inner surface of the rotating drum 4 by its inertia and its own weight and dropped to the side opposite to the lifting side by its own weight. In particular, the laundry is sufficiently swollen and loosened, and can be given a particularly high unraveling action to the laundry in a slippery state, and the mechanical performance can be exerted on the laundry, so that the washing performance can be enhanced. Furthermore, the forward / reverse arc rotation drive mode is established by alternately repeating the forward / reverse rapid arc rotation in the forward direction and the reverse rotation in the reverse direction. The lifting position and falling position can be switched alternately left and right in each arc rotation drive, so that it is possible to further improve the solving action while preventing the laundry from becoming tangled, and to increase the number of times the mechanical force is applied to the laundry As a result, the cleaning performance can be improved. In addition, since the entanglement between the laundry caused by the progress of the washing and rinsing process can be suppressed due to the high unraveling action, effective tapping washing in the forward and reverse arc rotation mode is continuously executed, and the washing effect and The rinsing effect can be enhanced.

Further, in the forward / reverse arc rotation drive mode alone, the tangling, twisting, wrinkles, etc. of the laundry are reduced, but 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. In addition, washing unevenness is likely to occur, but by using the forward / reverse continuous rotation drive mode together, it is possible to realize a change in the position of the laundry in the vertical direction, that is, the entanglement of the laundry in the forward / reverse continuous rotation drive mode, In addition to reducing twisting and wrinkling, and reducing the imbalance in applying mechanical force to the laundry in the forward and reverse arc rotation drive mode, the two different behaviors of washing and rinsing laundry in both modes, Depending on the forward / reverse arc rotation drive mode, the hand-washing behavior can be improved while reducing tangling, twisting, and wrinkling of the laundry. The large wash while reducing unevenness move continuously, given an effective washing behavior for uniform and strong stain.

  The circulation pump 20 is fixed to the base plate 2a, and the discharge side path 16b from the circulation pump 20 of the water circulation path 16 extends toward the front of the washing machine body 2 where the opening 13 of the water tank 3 is located. Specifically, as shown in FIG. 2, in the circulation pump 20, a resin-made pump casing 20b containing an impeller 20a is applied to a bearing partition 20d1 at the opening side of the motor casing 20d of the circulation motor 20c. And the impeller 20a is directly connected to the motor shaft 20e, and this is fitted to a mounting seat 35 made of resin.

  The lower half of the front wall 3h of the water tank 3 is formed with a bulging portion 3a formed in a substantially Y shape and bulging forward, and a cover 55 having substantially the same outer shape as the bulging portion 3a On the other hand, the water guide passage 55b is formed by attaching the packing 55a with the screws 55a between them.

  One end of a connecting portion 51 extending in the lateral direction is connected to the lower end portion of the bulging portion 3a, and the discharge side passage 16b of the water circulation passage 16 is connected to the other end of the connecting portion 51. Further, each upper end portion of the cover 55 formed in a substantially Y-shape is formed with a notch portion 55c having no sealing structure including the packing 55a, so that the bulging portion 3a and the cover 55 are approximately Y. Each of the upper ends of the water conduits 55 b formed by branching in a letter shape has an opening extending in the circumferential direction region between the notch 55 c and the back surface of the front end wall 3 h of the water tank 3 corresponding thereto. A discharge port 55d is formed.

  Washing water pressurized by the circulation pump 20 flows into the water conduit 55b from the connecting part 51 via the discharge side path 16b of the water circulation path 16, and corresponds to the back surface of the front end wall 3h of the water tank 3 from the discharge port 55d. Washing water is sprayed between the rotating drum 4 and the front end wall 4b of the rotating drum 4 and discharged into the rotating drum 4 through a flow path 52 formed therebetween. As shown in FIG. 5A, the discharge port 55 d is formed on the back surface of the front end wall 3 h of the water tank 3, specifically, the rotation center direction of the rotary drum 4, specifically, the front end wall 3 h of the water tank 3 and the front end wall 4 b of the rotary drum 4. Since the opening is directed toward the annular injection port 53 in the channel 52 between them, the washing water sprayed from the discharge port 55d is directed to the rotation center side of the rotary drum 4, specifically to the injection port 53. Thus, the water can be efficiently discharged in the radial direction to the inner rotation area of the rotary drum 4, and the washing water can be efficiently supplied regardless of the amount of laundry.

  In particular, the front end wall 3h of the water tank 3 has an inclined surface 3h1 inclined toward the rear side of the washing machine body 2 from a position corresponding to the discharge port 55d toward the inner periphery, and the rotating drum 4 from the inclined surface 3h1 to the inner periphery. By having the guide surface 56 inclined toward the opening 54 side, as shown in FIG. 5A, the washing water sprayed to the flow path 52 is made to extend along the guide surface 56 from the inclined surface 3h1. Since it is discharged toward the back side of the rotating drum 4 through the opening 54 of the rotating drum 4 from the injection port 53, the supply efficiency of the washing water to the laundry can be improved.

Here, as shown in FIGS. 5A and 5B, the 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 left outlet 55d (right side in FIG. 3B) when viewed from the front of the branched water conduit 55b is α, As shown in FIG. 5 (b), when the inclination angle of the guide surface 57 corresponding to the right discharge port 55d (left side in FIG. 3 (b)) when viewed from the front of the water conduit 55b is β, α> β Thus, as shown in FIG. 6, the washing water from the left-side injection port 53 as viewed from the front (arrow a shown in FIG. 5A) is injected relatively upward like the shower shape A. On the other hand, the washing water (arrow b shown in FIG. 5 (b)) from the right injection port 53 as viewed from the front is jetted downward from the shower shape A like the shower shape B. Become. That is, the wash water sprayed from the respective discharge ports 55d 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. Thus, it is possible to realize injection with different injection angles with respect to the rotation axis of the rotary drum 4.

  The tilt angle also affects the spread of the injection. When the angle of inclination is small, the wash water flowing along the inclined surface 3h1 changes abruptly at the guide surface 57 in the vicinity where the angle changes from the inclined surface 3h1 to the guide surface 57, and thus collides with the guide surface 57. It becomes a state. In this state, along with the flow along the guide surface 57, the expansion in the circumferential direction occurs, and the injection has the expansion. 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 sprayed from the right spray port 53 is a spray having a spread. According to the test results of the inventors, the spray was greatly spread and diffused up to an inclination angle of about 120 degrees, and the film-like jet with a small spread was obtained at 130 degrees or more.

  Further, as shown in FIG. 7, by changing the opening width of the discharge port 55d, it becomes possible to realize different injection widths and flow rates of the washing water from the respective discharge ports 55d. Since the different jets are discharged along the guide surface 56 from the jet port 53 to the inner side of the rotary drum 4 through the opening 54 of the rotary drum 4, the flow rate is optimum for each of low-volume and high-volume laundry. It becomes possible to provide a widening angle and enhance the cleaning effect, and it is possible to efficiently supply the cleaning water to the clothes and realize water saving.

  Further, as shown in FIGS. 8A and 8B, the discharge port 55d opens in a predetermined circumferential direction range toward the substantially rotation center side of the rotary drum 4, and the width of the opening in the rotation axis direction is set to two. Since the flow rate of the injection is determined by the width in the rotation axis direction of the opening of the discharge port 55d by setting the number of types or more, by setting the width in the rotation axis direction of the opening to two or more types, It is possible to realize injections with different washing water flow rates.

  Further, as shown in FIG. 9A, the opening direction (arrow c) of the discharge port 55d1 is shifted upward by a predetermined angle ξ with respect to the rotation center o of the rotating drum 4. As a result, the center of discharge (arrow c) from the discharge port 55d1 is discharged at a predetermined angle ξ with respect to the rotation center o of the rotary drum 4, so the center of injection from the injection port 53 (arrow c) is Injection is performed at a predetermined angle ξ with respect to the rotation center o of the rotating drum 4. And since the guide surface 56 is comprised cyclically | annularly centering | focusing on the rotation center o of the rotating drum 4, the cross-sectional shape of the guide surface 56 through which the wash water injected from the discharge outlet 55d1 passes is the guide surface with respect to the rotation center o. Even if the cross-sectional shapes of the 56 are the same, the angle from the rotation center o of the rotary drum 4 becomes gentler and becomes easier to expand in the circumferential direction, so that it is possible to realize injection with a large expansion angle.

  Further, by configuring the discharge center (arrow d) of the discharge port 55d to open toward the rotation center o of the rotary drum 4, it is possible to realize an injection shape with different spreads on the left and right.

9B, the discharge port 55d2 is provided with a guide portion 65 so that the opening direction (arrow e) is shifted upward by a predetermined angle σ with respect to the rotation center o of the rotary drum 4. ing. As a result, the center of discharge (arrow e) from the discharge port 55d2 is discharged at a predetermined angle σ with respect to the rotation center o of the rotating drum 4, so the center of injection from the injection port 53 (arrow e) is Injection is performed at a predetermined angle σ with respect to the rotation center o of the rotary drum 4. And the guide surface 57
Is formed in an annular shape around the rotation center o of the rotary drum 4, and therefore the cross-sectional shape of the guide surface 57 through which the cleaning water sprayed from the discharge port 55d2 passes is the same as the cross-sectional shape of the guide surface 57 with respect to the rotation center. Even so, as the angle from the rotation center o of the rotating drum 4 increases, it becomes gentler and more easily spread in the circumferential direction, so that it is possible to realize injection with a large spread angle.

  Further, as shown in FIGS. 9A and 9B and FIGS. 10A and 10B, in the vicinity of the upstream side in at least one water conduit 55b of the discharge port 55d, the washing water flows in the direction. A rib 66 is provided on the cover 55 so as to overlap the discharge port 55d. Normally, when the washing water flowing along the water guide passage 55b is discharged from the discharge port 55d, the washing water flows along the opening direction of the discharge port 55d and the guide portion 65 due to the influence of the velocity component in the longitudinal direction of the water guide passage 55b. There is a tendency that the discharge has an angle in the longitudinal direction of the water conduit 55b. In the first embodiment, as described above, the rib 66 that overlaps the discharge port 55d in the flow direction of the wash water is provided in the vicinity of the upstream side of the discharge port 55d in the water conduit 55b. When the wash water that has flowed into the rib 66 collides with the rib 66, the longitudinal speed component of the water conduit 55b for the wash water discharged from the discharge port 55d is suppressed, and discharged at a predetermined angle in the direction opened from the discharge port 55d. This makes it possible to achieve stable and stable injection with a large divergence angle.

  With the above configuration, the spray angle from the spray port 53 with respect to the rotation axis of the rotating drum 4 of the washing water is made different, and by making the spread different, the optimum spray corresponding to each of the low-capacity and high-capacity laundry An angle can be provided.

  For example, when the laundry at the start of washing is bulky without containing the cleaning liquid, even if the vicinity of the left injection port 53 shown in FIG. 6 is closed in the circumferential direction by the laundry, the right injection port By performing spraying having a large spread from 53 to the vicinity of the first opening 54 of the rotary drum 4, the laundry in the vicinity of the spraying port 53 is wetted early, and the volume is reduced. The blockage can be eliminated.

  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 wet part of the laundry from the center of the rotating drum 4 that is difficult to get wet by the jet having a wetness is also wetted at an early stage to increase the effect of the washing water, and the volume of the laundry at the back part is reduced by soaking the washing water from the vicinity of the center. Since the laundry easily moves in the rotating drum 4 at an early stage, the effect of tapping is improved, and the laundry can be sprayed from the gap formed by reducing the volume of the laundry to synergistically wash. The effect can be increased.

  Due to the above-described effects, the washing liquid is effectively applied to the laundry in the rotating drum 4 regardless of the amount thereof, and the laundry is caught because the discharge port 55d is not in contact with the laundry in the rotating drum 4. Therefore, it is possible to prevent the behavior necessary for washing, rinsing, drying, etc. from being disturbed, and to prevent the laundry from being damaged or torn, and the appearance is not impaired. 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 the first embodiment, the discharge ports 55d are provided at two places on the left and right, but it goes without saying that the same effect can be obtained even when there are three or more places.

(Embodiment 2)
11A 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 2 of the present invention, and FIG. 11B is another discharge port of the water circulation path of the drum type washing machine. The cross-sectional view of the vicinity is shown. 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. 11 (a), the curvature radius of the guide surface 58 corresponding to the left discharge port 55d (right side in FIG. 3 (b)) when viewed from the front of the branched water conduit 55b is γ, 11 (b), γ> δ, where δ is the curvature radius of the guide surface 59 corresponding to the discharge port 55d on the right side (left side in FIG. 3B) when viewed from the front of the water conduit 55b. Thus, as shown in FIG. 6, the washing water (arrow f shown in FIG. 11 (a)) 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 washing water (arrow g shown in FIG. 11 (b)) from the right injection port 53 as viewed from the front is injected downward from the shower shape A like the shower shape B. Become. That is, the wash water sprayed from the respective discharge ports 55d 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. Thus, it is possible to realize injection with different injection angles with respect to the rotation axis of the rotary drum 4.

  The radius of curvature also affects the spread of injection. When the radius of curvature is small, the washing water flowing along the inclined surface 3h1 suddenly changes its angle due to the curvature of the guide surface 59 in the vicinity of the change from the inclined surface 3h1 to the guide surface 59, so that it collides with the guide surface 59. It becomes a state. 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.

  In other words, the second embodiment can have the same effects as those of the first embodiment.

(Embodiment 3)
Fig.12 (a) shows sectional drawing of the discharge outlet vicinity of the water circulation path | route of the drum type washing machine in Embodiment 3 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. 12, the inclined surface 3 h 1 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. Can be realized.

  Further, the injection angle of the injection with respect to the rotation axis of the rotary drum 4 is determined by the inclination angle of the guide surface 61, and the injection expansion angle can be determined individually by the bending radius of the curved surface 60, and the injection expansion angle can be determined. It is possible to raise the injection angle while expanding, or to lay down the injection angle while suppressing the expansion angle of the injection. By making the curved surface 60 and the guide surface 61 into two or more shapes, the washing water from each injection port Thus, it is possible to realize injections with different injection angles with respect to the rotation axis of the rotary drum and different injection spread angles.

(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, in the vicinity where the inclined surface 3 h 1 changes to the guide surface 62 via the curved surface 60, the inclination angle ε is made small, and the angle of the washing water flowing along the inclined surface 3 h 1 is changed abruptly at the guide surface 62. Then, the flow of the washing water is made to collide with the guide surface 62, and injection with a large injection angle with respect to the rotation axis of the rotary drum 4 is realized by the guide surface 63 having an inclination angle ζ larger than the inclination angle ε. 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 guide surface 63 and the injection is unstable, a surface having an intermediate inclination angle may be added between them. . These shapes can also suppress uneven thickness in the vicinity of the guide surfaces 62 and 63. 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)
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 Embodiment 5 of the present invention, and FIG. 14B is another discharge of the water circulation path of the drum type washing machine. The expanded sectional view of the exit vicinity is shown. About the same structure as Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 14 (a), the spray angle with respect to the rotation axis of the rotating drum 4 of the washing water is determined by the extension line or the tangential direction of the guide surface 56 in the vicinity of the opening 54, so the end of the rear surface of the front end wall 3h. The portion may have a chamfered shape 65 with a predetermined angle to change the spray angle, and the chamfered shape 65 can also prevent the laundry from being damaged or torn. Similarly, the chamfered shape 65 may be a rounded shape 66 as shown in FIG.

(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.

  The drum type washing machine according to the present invention can provide an optimum spray angle and spread angle for each of low-capacity and high-capacity laundry, and can improve the cleaning effect. The rotating drum formed in the above 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 to the bottom rear side, and the rotation drum is driven to rotate. Thus, the present invention is useful as a drum-type washing machine for washing laundry stored in a rotating drum.

4 Rotating drum 53 Injection port 55d Discharge port

Claims (6)

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. A water tank installed so that the rotation axis direction is horizontal or inclined downward from the horizontal direction, a motor for controlling the rotation of the rotary drum, and the wash water in the water tank circulate through a circulation path connected to the water tank A drum-type washing machine including a water circulation system that circulates in the rotating drum by a pump, and that can drive at least one of a washing step and a rinsing step by driving the motor, the circulation pump, and the like.
The water circulation system is provided in a front end wall of the water tank and connected to a discharge-side path from a circulation pump of the circulation path, and the washing water provided in the water supply path and the back surface of the front end wall of the water tank and the rotation A plurality of outlets for discharging between the front end wall surface of the drum, and a plurality of outlets for injecting wash water into the rotary drum from between the front end wall back surface of the water tank and the front end wall surface of the rotary drum; The discharge port is opened in a predetermined circumferential range toward the substantially rotation center side of the rotating drum between the back surface of the front end wall of the water tank and the front end wall surface of the rotating drum, and the front end wall of the water tank A back surface of the second opening has a guide surface that is provided at a peripheral end of the second opening so that the washing water discharged from the discharge port is directed inward in the rotary drum through the first opening; The washing water discharged from the discharge port is the front end of the water tank. The back and flows along the guide surface, and configured to be injected from the injection port, wherein the shape of the discharge port is a drum type washing machine, characterized in that it consists of at least two or more kinds. The drum-type washing machine according to claim 1, wherein the discharge port is opened in a predetermined circumferential range toward the substantially rotation center side of the rotating drum, and the circumferential width of the opening is composed of two or more kinds. 3. The drum type according to claim 1, wherein the discharge port is opened in a predetermined circumferential direction range toward a substantially rotation center side of the rotating drum, and the width of the opening in the rotation axis direction is composed of two or more kinds. Washing machine. The drum type washing machine according to any one of claims 1 to 3, wherein at least one of the discharge ports has an opening or a guide portion in a predetermined angular direction with respect to a rotation center of the rotary drum. The rib which suppresses the speed component of the flow of the washing water of the longitudinal direction in the said water conduit in the upstream vicinity in the at least one water conduit of the discharge port was provided. The drum-type washing machine according to Item. The drum type washing machine according to any one of claims 1 to 5, wherein the plurality of guide surfaces have two or more shapes.

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