JP6260008B2 - 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, the water circulation technologies disclosed in Patent Documents 1 and 2 are configured by a hose for the water guide path from the discharge of the pump to the discharge port, respectively. There are problems such as an increase in countermeasure members for ensuring reliability against unbalanced vibration of the generated rotating drum and problems such as poor vibration insulation, and the problem that the problem increases every time the discharge ports are provided at a plurality of positions. It was.

  The present invention relates to a drum-type washing machine 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. Is to provide a simple configuration with high reliability.

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 path for circulating the wash water in the water tank into the rotary drum by a circulation pump, and the water circulation path is provided on a front end wall of the water tank and connected to a discharge side path from the circulation pump. A water passage and a plurality of injection ports provided in the water guide passage for injecting wash water into the rotating drum, and driving the motor, a circulation pump or the like to perform at least one of a washing step and a rinsing step. In Formula washing machine, the water guide paths, said front end wall, said constituted by a cover attached to the front end wall in the circumferential direction of the drum, distribution of the plurality of injection openings at different positions in the circumferential direction of the rotating drum The injection port has at least two types of injection angles of the washing water injected from the plurality of injection ports by varying the inclination angle of the front end wall.

In such a configuration, the piping to the connection part that is configured integrally with the water tank on the discharge side of the circulation pump is performed with a hose for vibration isolation, the front end wall of the water tank that is configured integrally with the connection part, and the water tank Since injection is performed through the water conduit and the injection port configured by the cover attached to the front end wall , even if there is a leakage of cleaning water in the water conduit, Since it does not fall into an unsafe state and the cross-sectional area of the conduit is larger than that of the hose, a low-circulation water circulation path can be realized. By increasing the discharge efficiency, it is possible to realize a drum type washing machine with high cleaning power with a simple and reliable configuration.

  In addition, by having at least two types of washing water spray angles sprayed from the plurality of spray ports, the laundry near the first opening of the rotating drum or the laundry located near the center of the rotating drum from the back Any of these can be wet early, and the effect of washing water can be enhanced.

According to the drum type washing machine of the present invention, the water guide channel is constituted by the front end wall of the aquarium and the cover attached to the front end wall of the aquarium, so that the front end wall of the aquarium configured integrally with the connecting portion, the aquarium In order to inject through the water channel and the injection port constituted by the cover attached to the front end wall of the water, even if there is a leakage of cleaning water in the water channel, water leakage to the outside of the machine, etc. due to completion in the water tank Therefore, it is possible to realize a low-loss water circulation path because the cross-sectional area of the conduit is larger than that of the hose, so that the clothes in the rotating drum of the circulating water can be supplied by the discharge side path from the circulation pump. It is possible to realize a drum-type washing machine having a high cleaning power with a simple and reliable configuration by increasing the efficiency of the discharge.

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 end 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) Cross-sectional view near the discharge port of the water circulation path of the drum type washing machine (b) Cross-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) Cross-sectional view near 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 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 of the drum type washing machine in Embodiment 3 of this invention Sectional drawing of discharge port vicinity of the water circulation path 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 of the drum type washing machine in Embodiment 6 of this invention Sectional drawing of the water circulation path vicinity of the water circulation path of the drum type washing machine in Embodiment 7 of this invention Sectional drawing of water supply path vicinity of the water circulation path of the drum type washing machine in Embodiment 8 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 so that the direction of the rotation axis is horizontal or inclined downward from the horizontal direction from the bottom to the bottom side, a motor for controlling the rotation of the rotating drum, and the washing water in the water tank by a circulation pump A water circulation path that circulates in the rotating drum, wherein the water circulation path is provided in a front end wall of the water tank and connected to a discharge side path from the circulation pump, and in the wash water provided in the water supply path. the a plurality of injection openings for injecting said rotating the drum, the motor, the cleaning step by driving the circulation pump or the like, at least one of enabling the drum type washing machine of the rinsing process, the water channel, the front And the wall, configured in the circumferential direction of the drum by mounted cover on the front end wall, and disposing the plurality of injection openings at different positions in the circumferential direction of the rotary drum, wherein the injection port is the front end wall By providing at least two types of spraying angles of washing water sprayed from the plurality of spraying ports by varying the inclination angle, piping to the connection portion that integrally configures the discharge-side path of the circulation pump in the water tank is provided. In order to inject through the front end wall configured integrally with the connection portion and the water guide passage and the injection port constituted by the cover attached to the front end wall , it is assumed that the water is washed in the water guide passage. Even if there is a leakage of water, it is completed in the water tank so that it does not fall into an unsafe state such as water leakage to the outside of the machine, and the cross-sectional area of the conduit is larger than that of the hose. Therefore, it is possible to realize a drum-type washing machine with high cleaning power with a simple and reliable configuration by increasing the efficiency of discharging the circulating water to the clothes in the rotating drum through the discharge side path from the circulation pump. It becomes possible to do.

  In addition, by having at least two types of washing water spray angles sprayed from the plurality of spray ports, the laundry near the first opening of the rotating drum or the laundry located near the center of the rotating drum from the back Any of these can be wet early, and the effect of washing water can be enhanced.

In the second aspect of the invention, in particular, in the water tank of the first aspect of the invention, it is possible to increase the cross-sectional area of the water conduit by forming the water conduit in the bulging portion provided on the front end wall . By realizing the water circulation path, cleaning with a highly efficient shower becomes possible.

  In the third invention, in particular, the water conduit of the first invention is formed in the bulging portion provided in the cover, so that the cross-sectional area of the water conduit can be made larger and the swelling of the water tank can be suppressed. It becomes possible to realize a more compact and low-pressure loss water circulation path.

According to a fourth aspect of the present invention, in particular, the water conduit of any one of the first to third aspects has a discharge port provided between the cover and the front end wall , so that the laundry in the rotating drum is caught. It becomes possible to discharge without a spout having such a special shape and structure, and it is possible to perform highly efficient cleaning by spraying without damaging the laundry with a simple configuration.

  The fifth aspect of the invention is particularly a design factor because the cover of any one of the first to fourth aspects of the invention also serves as a cover of the connection space of the connection portion from the circulation pump to the conduit of the pipe. And due to factors in the mold structure, it is possible to easily solve the position and structure restrictions of the connection part of the piping from the circulation pump to the water conduit by using the cover also as the lid of the connection space of the connection part. Become.

According to a sixth aspect of the present invention, in particular, in any one of the first to fifth aspects, a water conduit is formed between the cover and the front end wall via a seal member, so that the washing water pressurized by a circulation pump is provided. Can be efficiently ejected without leakage, so that more efficient cleaning can be performed.

In the seventh aspect of the invention, in particular, any one of the first to sixth aspects of the invention was pressurized with a circulation pump with a simple configuration by forming a water conduit by welding between the cover and the front end wall . The cleaning water can be efficiently ejected without leakage, and more efficient cleaning can be performed.

  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)
FIG. 1 is a cross-sectional view showing a schematic structure of a drum type cleaning machine in Embodiment 1 of the present invention, FIG. 2 (a) is a cross-sectional view of a circulation pump used in the drum type cleaning 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 a 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 vicinity of the water conduit 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. 5B is a sectional view of the vicinity of another outlet of the water circulation path of the drum type washer, and FIG. 6 is a front view showing a state of jetting of the washing water of the drum type washer. Is shown.

  The drum type cleaning machine of the first embodiment automatically controls at least the cleaning process, the rinsing process, and the dehydration by automatically controlling the motor 6, the water supply system 7, the drainage system 8, and the drying system 9 shown in FIG. 1 according to the mode setting and control program. 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, the cleaning water in the water tank 3 is circulated through 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 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. 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.

  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. The main body opening 2b is provided with an opening / closing door 5, and the second 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 wall 20d1 at the front end 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.

  In the lower half of the front end wall 3h of the water tank 3, a bulging portion 3a formed in a circumferential direction in a substantially Y shape and bulging forward is formed, and a cover 55 having substantially the same shape as the bulging portion 3a. However, the water guide channel 55b is formed by being attached by fastening screws or the like with the packing 55a interposed therebetween from the inside.

  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. The cover 55 also serves as a cover for the connection space 51a of the connecting portion 51 to the water conduit 55b of the pipe from the circulation pump 20, and due to this configuration, the circulation pump 20 has a design factor and a mold structure factor. It is possible to easily solve the restriction of the position and structure of the connecting portion 51 from the pipe to the water conduit 55b by using the cover 55 as a lid of the connection space 51a 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 the 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.

  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)
7A 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. 7B 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. 7A and 7B, 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. 7A, 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, As shown in FIG. 7B, γ> δ, where δ is the curvature radius of the guide surface 59 corresponding to the right outlet 55d (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 c shown in FIG. 7A) 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 from the right injection port 53 as viewed from the front (arrow d shown in FIG. 7 (b)) 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. 8 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. 8, 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. 9 shows 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. About the same structure as Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 9, in the fourth embodiment, the guide surface is configured by surfaces having a plurality of inclination angles.

  In FIG. 9, the inclination angle ε is reduced in the vicinity of the change from the inclined surface 3 h 1 to the guide surface 62 through the curved surface 60, and the angle of 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)
FIG. 10 (a) 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. 10 (b) 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. 10 (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. 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. 11 shows 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. About the same structure as Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 11, the inclined surfaces 64 and 64a and the curved surfaces 60 and 60a having a plurality of inclination angles in consideration of the spread of the injection, the injection angle, the stability of the injection, the damage, tearing, and uneven thickness of the laundry. 60b, 60c, end portions and the like are gradually changed.

(Embodiment 7)
FIG. 12 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. 12, the water guide channel 55e is provided with a bulging portion 55f projecting toward the rotating drum 4 on the cover 55, and the swelled portion 55f provides a water guide channel. The cross-sectional area of 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 conduit 55e is the same as that of the water conduit 55b, it is possible to suppress the bulging of the water tank 3 to the front, and it is possible to realize a more compact and low-pressure loss water circulation path 16. .

(Embodiment 8)
FIG. 13 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. 13, 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 is highly reliable in realizing a drum type washing machine with high cleaning power by increasing the efficiency of discharging the circulating water to the clothes in the rotating drum by the discharge side path from the circulation pump. Since it can be realized with a simple configuration, the rotation drum direction of the rotating drum formed in the bottomed cylindrical shape is horizontal or inclined downward from the horizontal direction from the opening front side toward the bottom back side. In this way, it is installed in a water tank and is useful as a drum-type washing machine or the like for washing laundry stored in a rotating drum by rotationally driving the rotating drum.

3 Water tank 16 Water circulation path 20 Circulation pump 51 Connection part 55 Cover 55b Water conduit

Claims (7)

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 rotation of the rotary drum, and washing water in the water tank is circulated in the rotary drum by a circulation pump A water circulation path, the water circulation path is provided in a front end wall of the water tank and connected to a discharge side path from the circulation pump, and the washing water provided in the water conveyance path is placed in the rotating drum. and a plurality of injection openings for injecting the motor, the washing step by driving the circulation pump or the like, at least one of enabling the drum type washing machine of the rinsing process, the water guide paths, said front end wall, said front The cover attached to the wall constitutes the circumferential direction of the drum, and disposing the plurality of injection openings at different positions in the circumferential direction of the rotary drum, wherein the injection port is made different inclination angle of the front end wall Accordingly, the drum type washing machine has at least two types of spray angles of the wash water sprayed from the plurality of spray ports. The drum-type washing machine according to claim 1, wherein the water guide path is formed in a bulging portion provided on the front end wall . The drum type washing machine according to claim 1, wherein the water conduit is formed in a bulging portion provided in the cover. The drum type washing machine according to any one of claims 1 to 3, wherein the water conduit has a discharge port provided between the cover and the front end wall . The drum type washing machine according to any one of claims 1 to 4, wherein the cover also serves as a cover for a connection space of a connection portion from the circulation pump to a water conduit of a pipe. The drum type washing machine according to any one of claims 1 to 5, wherein a water conduit is formed between the cover and the front end wall via a seal member. 7. A water conduit is formed by welding between the cover and the front end wall.
The drum type washing machine according to any one of the above.

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