TWI394880B - Drum type washing machine - Google Patents

Abstract

A water circulation system comprises a spray orifice (51) provided behind a front side wall (34) of a water tub (3) and a flow path (52) formed between a back surface of the front side wall (34) of the water tub (3) and a front side wall surface of a rotary drum (4), wherein the front side wall surface (4b) of the rotary drum (4) has a shape so formed that a distance of the front side wall surface (4b) from the axis of rotation varies with rotation of the rotary drum (4), and circulating water sprayed from the spray orifice (51) is discharged through the flow path (52) into the rotary drum (4). The system can spray the circulating water evenly over laundries regardless of an amount and kind of the laundries put in the water tub (3) without requiring a complicated structure.

Description

Drum washing machine Field of invention

The present invention relates to a drum type washing machine which is formed in a bottomed cylindrical rotating drum and which is provided in a water tank and which washes the washings contained in the rotating drum by driving the rotating rotating drum.

Background of the invention

In the drum type washing machine, the rotary drum is disposed in a water tank that is configured such that the front side of the opening faces the bottom side, and the rotation axis direction is horizontal or inclined downward from the horizontal direction, and the circulation of water in the water tank is circulated. Although the pump has a circulation function, it is known as described below.

Japanese Laid-Open Patent Publication No. Hei 11-276791 (Patent Document 1) uses a pump as a circulation pump during a washing stroke or a flushing stroke, circulating flushing water or washing water, and actively stirring the washing agent and the washing water at the beginning of the washing course. Seeking to dissolve the lotion early. Techniques for use as drainage pumps in dewatering or drainage strokes are disclosed. Further, it is disclosed that a filter case is provided on the way of the water pump side of the circulation pump of the circulation route for trapping the inclusions in the water absorption, whereby there is no technique in which the inclusions enter the circulation pump.

Japanese Laid-Open Patent Publication No. 2005-58741 (Patent Document 2) discloses a technique of circulating water in a water tank by a circulation pump to prevent a phenomenon in which a lotion is concentrated in a heater installation space or a specific space. Moreover, it is also disclosed that the laundry is rapidly heated before washing to improve the washing efficiency.

Japanese Laid-Open Patent Publication No. Hei. No. 2006-223572 (Patent Document 3) discloses a circulatory pump set having a filter unit for trapping rinsing of a circulating pump unit and a wire scrap, which is provided in a bottom plate of an outer box of a washing machine. By arranging a circulation pump on the platen through the elastic material, when the water in the water tank is circulated, the vibration of the pump motor can be prevented from being transmitted to the platen. Thereby, a technique for preventing noise caused by resonance of vibration of the pump motor and vibration of the outer casing is disclosed.

JP-A-2006-239142 (Patent Document 4) discloses a technique in which water in a water tank is added to a rotary drum and sprayed around a heater for drying to remove swarf adhering to the periphery of the heater.

However, the technique relating to the water circulation disclosed in Patent Documents 1 to 4 each sprays circulating water from the pipe end into the rotary drum. Therefore, the specially designed circulating water can be sprayed only to the portion of the washings in the rotating drum, and the circulation effect cannot be effectively exerted. The technique described in Patent Documents 2 to 4 employs a special injection nozzle for a wide range of injections, but it is necessary to increase the pump pressure, which causes a cost increase. Also, the rise in pump pressure is limited. Further, in the techniques disclosed in Patent Documents 1, 3, and 4, the piping of the water circulation system penetrates the end wall portion before the water tank, and the structure of the piping in the rotating drum becomes more complicated, which is a cause of cost increase.

Summary of invention

The present invention provides a drum type washing machine which does not use a complicated structure, and which circulates the circulating water uniformly on the laundry by a circulation pump regardless of the amount or kind of the laundry which is put into the water tank. Thereby, it is possible to effectively improve the detergency while suppressing an unnecessary increase in cost.

The washing machine of the present invention comprises: a rotary drum formed in a bottomed cylindrical shape; and a water tank disposed inside, and configured to be from a front side of the opening toward a back side of the bottom, and the direction of the rotation axis is horizontal or horizontal The motor is driven to rotate the rotating drum; the control unit controls the motor to perform at least one of a washing stroke or a water flushing stroke; and the water circulation system is configured to connect the washing water in the water tank to the water tank. The circulation route is circulated in the rotary drum by a circulation pump disposed on the circulation route. The water circulation system has an injection port disposed in the front end wall of the water tank, and a flow path formed between the end wall of the front wall of the water tank and the front end wall surface of the rotating drum, and the front end wall surface of the rotating drum is represented by the rotating drum The rotation is changed, and the distance from the rotation axis is changed, and the circulating water sprayed from the injection port is configured to be discharged into the rotary drum via the flow path.

Thereby, the water circulation can be used to suck the washing water in the water tank to return to the water tank by the rinsing stroke or the rinsing stroke by the circulation pump and the circulation route, and circulate it. At that time, the circulation route can connect the flow path formed between the front end walls of the water tank and the rotary drum only by connecting the front wall of the water tank. Therefore, the flow path is formed in the inner circumference of each front end wall without special piping. The annular outlet between the parts discharges circulating water in the rotating drum. Further, since the water passes through the flow path between the front end walls of the water tank and the rotary drum, and is discharged from the annular outlet between the inner peripheral portions of the front end walls, there is no need for a special shape that is caught by the washings in the rotary drum. The spit out of the structure can also spit out circulating water.

Further, since the surface of the end wall before the rotary drum is changed from the rotational axis by the rotation of the rotary drum, the rotary drum is rotated, and the discharge direction of the circulating water can be changed in the vertical direction. Therefore, regardless of the amount or type of the laundry to be charged in the water tank, the circulating water can be uniformly sprayed onto the laundry, and the unnecessary cleaning cost can be suppressed, and the cleaning power can be effectively improved.

Simple illustration

Fig. 1 is a cross-sectional view showing a drum type washing machine in accordance with a first embodiment of the present invention.

Fig. 2A is a cross-sectional view of a circulation pump of the same type of drum type washing machine.

Fig. 2B is a side view of the circulation pump of the drum type washing machine.

Fig. 2C is a bottom view of the circulation pump of the drum type washing machine.

Fig. 3A is a front view showing a pipe connecting the sink to the discharge side route of the water circulation route of the drum type washing machine.

Fig. 3B is a cross-sectional view showing a pipe connecting the sink to the discharge side route of the water circulation route of the drum type washing machine.

Fig. 3C is a longitudinal sectional view showing a pipe connecting the water tank to the discharge side route of the water circulation route of the drum type washing machine.

Fig. 4A is a front view showing the rotary drum of the same drum type washing machine.

Fig. 4B is a longitudinal sectional view showing the relationship between the rotary drum and the water receiving groove of the drum type washing machine.

Fig. 4C is a longitudinal sectional view showing another relationship between the rotary drum and the water receiving groove of the drum type washing machine.

Fig. 5 is a front elevational view showing the other rotating drum of the drum type washing machine.

Detailed description of the preferred embodiment

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

In the drum type washing machine of the first embodiment, as shown in Fig. 1, a water tank 3 that can be shaken is disposed inside the main body of the washing machine 2. A rotating drum 4 that is freely rotatable is disposed in the water tank 3. The rotary drum 4 is driven to rotate around the rotation axis 4c by a motor 5 installed from the outside on the back surface of the water tank 3. In front of the rotary drum 4, a fluid balancer 6 is provided to reduce the vibration during the dehydration stroke. In front of the fluid balancer 6, a rib 6a is formed to prevent the credit card or the like from falling in.

Further, the drum type washing machine of the present embodiment has an automatic control motor 5, a water supply system 7, a drain system 8, and a drying system 9 as shown in Fig. 1, and performs at least a washing stroke and a water flushing according to a mode setting or a control program. Stroke, dehydration stroke, drying stroke and other functions. However, the dehydration stroke and the drying stroke can be omitted. Therefore, the drying system 9 can be omitted.

The water supply system 7 is opened and closed by a solenoid valve (not shown) as indicated by a solid arrow A, and water is supplied in a timely manner. Moreover, the lotion of the lotion accommodating portion 7a can be put into the water tank 3 in a timely manner by the water supply.

The drain system 8 is opened and closed by the drain valve 19 as shown by the chain arrow B, and is passed through the drain pipe 8a connected to the lower portion of the water tank 3 when the washing stroke is finished or when the fresh water flushing stroke is completed. After the drain filter 8b of the wire is collected, the washing water in the water tank 3 is discharged. The drain filter 8b is detachable from the outside.

The drying system 9 is such that the air in the water tank 3 and the rotary drum 4 is circulated by the blower 12 as indicated by a broken line arrow C in Fig. 1 . The drying system 9 has a filter for collecting dust and dust (not shown), a dehumidifying portion for introducing air after dehumidification and dust removal (not shown), and a heating portion for heating and dehumidifying the air to be a dry high temperature air. (Not shown on the map). The blower 12 blows high-temperature air into the rotary drum 4 through the air supply filter 10.

In addition, the drum-type washing machine of the present embodiment is configured to circulate the washing water in the water tank 3 by the water circulation system 16 in response to the washing process, the water washing process, and the like, and has the function of purging or washing water. Upward function. The water circulation system 16 drives the circulation pump 20 to repeatedly pass the washing water in the water tank 3 to the inflow side route 31a of the circulation pump 20 to the drain pipe 8a, the drain filter 8b, and the water circulation path 31, from the circulation pump 20, the water circulation route 31. The order of the discharge side path 31b of the circulation pump 20 is returned to the inside of the water tank 3.

Further, the mode of the operation stroke or the like or the selection of various functions is performed by inputting from the operation panel 21 provided on the front surface of the washing machine main body 2. The control unit 22 displays the display unit on the operation panel 21 based on the input information to notify the user. At the same time, when the start operation is set by the input setting unit of the operation panel 21, the data is input from the water level detecting unit that detects the water level in the water tank 3, that is, the drive is started. Thereby, the control unit 22 controls the operation of the drain valve, the water supply valve, and the like, and performs operations such as washing, dehydration, and drying.

The rotary drum 4 is coupled to the motor 5 directly connected to the water tank 3 on the rotating shaft. The rotary drum 4 is inclined from the opening side (the left side of FIG. 1) to the bottom side (the right side of FIG. 1) like the water tank 3, and the rotation axis direction is inclined from the horizontal direction to the angle θ=20±10 degrees. Thereby, compared with when the horizontal direction is set, although the rotary drum 4 is disposed at the same height, since the opening of the water tank 3 and the rotary drum 4 is obliquely upward, it is easy to take out and put in the washing without the need to take a bare posture of bending the lower waist. Things. In particular, from the experience of the inventors, etc., by setting the tilt angle to 20 ± 10 degrees, even if there is a gap from the child (excluding the child) to the height of the adult, even if the wheelchair is used, it can be easily taken out. Into the wash. Further, the washing water supplied to the rotary drum 4 is stored on the back side, and a deep water storage state can be obtained even with a small amount of water. The water tank 3 drives the washings in the rotary drum 4 to improve the water supply efficiency. Therefore, the water tank 3 has the same inclination as the rotary drum 4, and is disposed along the vicinity of the rotary drum 4. Further, a switch door 40 is provided on the front surface of the washing machine body 2. The opening and closing door 40 closes the opening 13 of the water tank 3 via the sealing member 14 attached to the lip thereof, and can also be opened.

Further, the driving of the rotary drum 4, the dehydration stroke is continuously rotated at a high speed of, for example, 1000 rpm. Therefore, the entanglement, distortion, and wrinkles caused by the washing in the washing stroke and the water washing stroke are attached to the inner surface of the rotary drum 4 in the same state, and the printed matter is attached to the laundry. Therefore, the washing is not easy to take out, and the handling afterwards is also very troublesome. Moreover, it is easy to leave wrinkles that are difficult to remove on the washings, and it is quite troublesome to remove the wrinkles.

In order to eliminate such a thing, in the present embodiment, during the washing stroke, or the washing stroke and the fresh water rinsing stroke, the rotary drum 4 has an alternating positive arc rotation and an acute reverse arc rotation which are alternately repeated over 90 degrees and less than 180 degrees. The forward and reverse arc rotation drive mode. Further, in the washing stroke, the washing stroke, and the fresh water rinsing stroke, a rotation speed indicating that the laundry lifted by the rotation of the rotary drum 4 falls from a height exceeding its own weight is provided, and the rotation is performed by the rotation The forward and reverse continuous rotation drive modes of the rotary drum 4 are continuously rotated alternately in the forward and reverse directions. Further, in the washing stroke, or the washing stroke and the water flushing stroke, the forward-reverse rotation driving mode and the forward-reverse continuous rotation driving mode are alternately executed. Thereby, the tangling and twisting of the washing material can be greatly improved, the mechanical force can be improved, and the wrinkles are less likely to occur.

That is, in the present embodiment, the rotating drum 4 is rotated more than 90 degrees and less than 180 degrees, and the arc is rotated and slammed, and the washings can be lifted up to more than 90 degrees and less than 180 degrees. After that, the washing object is slammed and stopped when it is lifted to the final stage, and the washing material is surely peeled off from the inner surface of the rotating drum 4 according to its inertia and its own weight, and the laundry is lifted and lifted by its own weight. The opposite side of the side falls down. Therefore, for a washing material which is very swellable in water and soft and slippery, it is particularly imparted with a high unwinding effect, and mechanical force can affect the washing material. Therefore, the washing performance can be improved.

Furthermore, the positive and negative arc rotation driving mode is formed by alternating the positive positive arc rotation in the positive direction and the reverse reverse arc rotation in the reverse direction, and is driven by the positive and negative alternate arc rotation rotation. The high-lift position and the falling position are alternately interchanged left and right each time the arc rotation drive is driven. Therefore, not only the entanglement of the washing material can be prevented, but also the effect of unwinding can be enhanced, and the number of times the mechanical force affects the washing material can be increased. Therefore, the washing performance can be improved. Further, by the high unwinding action, it is possible to suppress the entanglement between the washings during the washing and water washing strokes. Therefore, the effective rinsing is continuously performed in the forward and reverse arc rotation driving mode, and the washing effect and the water rinsing effect can be improved.

Further, in the forward-reverse rotation driving mode, the entanglement, twisting, wrinkles, and the like of the washing material can be reduced, but on the other hand, the position of the washing object in the up-down direction is not easily changed, and it is difficult to turn the washing of the bottom of the rotating drum 4 Things, easy to produce uneven washing conditions. However, by using the forward and reverse continuous rotation drive mode in combination, it is possible to change the position of the upper and lower sides of the washing object. That is, by using the combination of the forward and reverse continuous rotation driving modes, not only the entanglement, distortion, wrinkles of the laundry in the forward and reverse arc rotation driving modes can be alleviated, but also the washing of the washings in the forward and reverse arc rotation driving modes can be alleviated. Unbalanced mechanical force. Therefore, two modes can be used to impart two different actions in washing and water washing. Specifically, the driving mode by the forward and reverse arc rotation can continuously reduce the entanglement, distortion, and wrinkles of the washing material, and can impart a gesture like a hand washing. Further, by the forward/reverse continuous rotation driving mode, it is possible to perform washing while reducing the vigorous and continuous uneven turning of the washing material, and it is possible to impart uniform and effective washing behavior to extremely dirty dirt.

In the drying stroke, in particular, the forward and reverse arc rotation driving mode is performed, and it is most suitable for the wrinkle stretching of the washing material after dehydration, and the finished quality is remarkably improved, and the work of finishing the tail is greatly reduced. However, since the washing material of the drying stroke is light and is not easily attached to the inner surface of the rotary drum 4, the rotation angle of the rotary drum 4 is preferably set to 90 or more and less than 200.

The maximum rotational speed of the rotary drum 4 in the forward-reverse continuous rotation drive mode is preferably set at 45 ± 5 rpm as usual. The maximum rotation speed of the rotary drum 4 in the forward-reverse rotation driving mode is suitably set to 40 rpm or more in the washing and fresh water rinsing strokes, and is preferably set to 50 rpm or more after dehydration.

Here, the circulation pump 20 will be described. The circulation pump 20 is fixed to the platen 2a at the bottom of the washing machine body 2 as shown in Fig. 1 . Specifically, the circulation pump 20 is integrated as shown in Figs. 2A to 2C, and the opening side of the resin pump casing 20b accommodating the impeller 20a is coupled to the bearing partition 20d1 at the front end of the metal motor casing 20d of the circulation motor 20c. . The impeller 20a is directly coupled to the motor shaft 20e, and the impeller 20a is fitted to the resin mount 35. The three places around the mount 35 have a slightly C-shaped mounting piece 35a. The urging plate 35a is screwed into the boss portion (not shown) on the platen 2a by bolts (not shown), and the circulation pump 20 is attached to the platen 2a. The circulation pump 20 absorbs water through an L-shaped suction port 20f integrally formed at a lower portion of the pump casing 20b. Thereafter, the discharge port 20g is integrally formed in the wiring direction of the pump casing 20b, and the washing water is discharged from the peripheral wall of the water tank 3 via the discharge side path 31b.

Next, the water circulation system 16 will be described. The water circulation system 16 circulates the washing water in the water tank 3 through the water circulation path 31 connected to the water tank by the circulation pump 20 provided in the water circulation path 31. First, as shown in Fig. 1 and Figs. 3A to 3C, an injection port 51 is formed at the lowermost portion of the front end wall 3h around the opening 13 of the water tank 3. The discharge side route 31b of the water circulation route 31 is connected to the injection port 51 from the outside. As indicated by the solid arrows D1 and D2 in Fig. 1, the circulating water from the discharge side path 31b is ejected between the inside of the front end wall 3h of the water tank 3 and the surface of the end wall 4b before the rotating drum 4 (supply). When the washing water in the water tank 3 is circulated through the water circulation route 31, it is hereinafter referred to as circulating water). Thereby, water is discharged into the rotary drum 4 through the flow path 52 formed between the end wall 3h of the water tank 3 and the surface of the front end wall 4b of the rotary drum 4. At this time, the motor rotation speed of the circulation pump 20 is set to, for example, 3,500 rpm. The injection port 51 of the water from the discharge side path 31b is prevented from being caught by the injection port 51 due to the position where it is not in contact with the washing material in the rotary drum 4, and it is necessary to disturb the washing or rinsing, drying, etc. Move, or scratch, break the wash, etc. Also, it won't damage the look of good looks. Further, the flow path 52 is formed between the front end wall 3h of the water tank 3 and the front end wall 4b of the rotary drum 4, and does not require any special parts, and generally has a structure such as a sealing member 56 (see FIG. 3C) which will be described later. The risk of water leakage can be reduced simply and cheaply.

The injection port 51 is located inside the front end wall 3h of the water tank 3, and is opened in the direction of the center of rotation of the rotary drum 4 as shown in Fig. 3C. Specifically, the injection port 51 is formed between the front end wall 3h of the water tank 3 and the front end wall 4b of the rotary drum 4, and opens toward the annular outlet 53 of one of the flow paths 52. Therefore, the circulating water sprayed from the injection port 51 is efficiently discharged from the flow path 52 to the center of rotation of the rotary drum 4 as indicated by the solid arrow D. Specifically, the circulating water is efficiently discharged toward the inner side of the rotary drum 4 in the radial direction toward the annular outlet 53. Therefore, 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 and a curved surface 3h2. The inclined surface 3h1 is inclined toward the rear side of the washing machine body 2 from the position opposite to the injection port 51, and is inclined toward the rear side of the washing machine body 2. The curved surface 3h2 is curved toward the opening 54 side of the rotary drum 4 from the inclined surface 3h1 to the inner circumference. As a result, the circulating water sprayed toward the flow path 52 is discharged from the inclined surface 3h1 to the curved surface 3h2 as indicated by an arrow D in FIG. 3C, and is discharged to the inside of the rotary drum 4 through the opening 54 of the rotary drum 4. Therefore, the efficiency of supplying the circulating water to the laundry can be improved.

Here, a connection port 51a that connects the discharge side path 31b is formed in the front end wall 3h of the water tank 3. The circulating water is sprayed from the connection port 51a to the injection port 51 of the flow path 52, and is connected to the flow path 52 toward the rotation center side of the rotary drum 4, and an opening is formed in a predetermined range W1 in the circumferential direction. In this way, the connection port 51a is provided in the front end wall 3h of the water tank 3, and the injection port 51 opening to the flow path 52 is formed, and the circulating water is accurately guided to the flow path 52 side through the injection port 51 from the discharge side path 31b. Therefore, the circulating water is spread out from the predetermined area W2 of the annular outlet 53 corresponding to the predetermined range in the circumferential direction of the injection port 51, toward the left and right in the predetermined direction (left and right as seen from the front of the washing machine body 2), and is stably moved toward The inside of the rotary drum 4 is discharged.

As a result, the circulating water flowing from the connection port 51a can be accurately guided to the flow path 52 through the injection port 51. With this, the discharge of the circulating water from the predetermined range corresponding to the circumferential direction of the injection port 51 to the left and right in the predetermined direction can be stably and effectively supplied regardless of the amount of the laundry in the rotary drum 4. .

Further, the injection port 51 guides the circulating water to the opening of the flow path 52 between the connection end portion 55d of the discharge side path 31b connected to the connection port 51a. In this way, the injection port 51 provided in the connection port 51a to which the discharge side path 31b is connected is the side where the circulating water is directed to the flow path 52, and the connection port 51a is connected to the connection port 51a of the discharge side path 31b. The portion 55d can satisfy the appropriate guiding conditions by utilizing the form enclosed by the simple shapes of the mutual symmetry. That is, in order to guide the circulating water toward the flow path 52 side, by adopting the form enclosed by the above simple shape, it is possible to have a large discharge water flow width in the circumferential direction of the circle and a sufficient discharge water flow thickness in the forward and backward directions. Or, the discharge flow rate, which can increase the splash distance, and the like, can satisfy appropriate guiding conditions regardless of the amount of the washing material. Moreover, the piping structure is not particularly complicated, and the risk of water leakage is not increased, and the cost is not increased.

Further, as shown in Figs. 1 and 3A to 3C, the injection port 51 is opened at an approximate center position of the bottom end of the front end wall 3h of the water tank 3, and the front end of the ejection port 51 and the discharge side path 31b is 3A, 3B. The figure is shown connected by a resin tube 55. This tube 55 is formed by combining two front and rear members 55a and 55b, and is formed flat in front and rear. The discharge side path 31b and the opening position with respect to the injection port 51 are biased to either the left side or the right side, and extend forward slightly in parallel with the axis of the circulation pump 20 to the water tank 3. Further, the tube 55 is connected by a connecting pipe 55c integrally formed at one end of the rear member 55b, and is connected as an extension portion thereof on the discharge side path 31b. Further, after the tube 55 extends approximately horizontally from the one end side to the lower side of the ejection opening 51, the end side thereof is bent and raised to the ejection opening 51. Further, as shown in Fig. 3C, the connecting portion 55e of the rising portion of the rear member 55b is integrally formed with the member 55b after the connecting end portion 55d. The connecting portion 55e is connected to the connecting port 51a of the front end wall 3h of the water tank 3 which is opened to the injection port 51 by a sealing member 56, and is screwed and fixed by screws 57.

In this way, the outer peripheral portion of the water tank 3 is protruded from the connecting portion 55e connected to the connection port 51a of the front end wall 3h of the water tank 3, and the tube 55 on the side of the circulation pump 20 is formed to be flat before, and the front end wall 3h of the water tank 3 is formed. It can also be piped in a small space between the front wall of the washing machine body 2. Further, due to the flat shape of the tube 55, the circulating water can be rectified into the water flow width and the water flow thickness of the opening of the proportional injection port 51, and is sprayed from the connection port 51a toward the injection port 51 to the flow path 52. Thereby, the circulating water having a large circumferential direction, a sufficient discharge thickness in the front-rear direction, or a discharge speed range in which the splash distance can be increased from the annular outlet 53 can be used to provide the circulating water in a water flow that is undisturbed. Therefore, the effect of washing and rinsing with water is improved.

Further, the tube 55 extends from the outer circumference of the water tank 3 to the lower side of the connection port 51a of the injection port 51 near the lower end of the front end wall 3h, and from there to the connection port 51a is connected by the connection end 55d of the curved rising portion. The connection port 51a. Therefore, the circulating water of the flattened flow is guided by the curved shape of the connecting end portion 55d of the rising portion to the connecting port 51a, and the jetting port 51 having the flattening direction, and can be ejected on the circumference of the flow path 52. In the intended area of direction. Therefore, the washing water is discharged from the portion of the annular outlet 53 in a relatively wide area, and the effect of the washing water on the washing material can be enhanced.

In particular, the injection port 51, from the connection port 51a opening to the front end wall 3h of the water tank 3, is formed by a barrier wall 51c integrally formed adjacent to the front end wall 4b side of the rotary drum 4, and at the edge of the connection port 51a. An opening is formed between the upper portions toward the annular outlet 53. The connecting portion 55e has a concentrated wall 55f between the partition wall 51c, and the concentrated wall 55f concentrates the injection passage toward the injection port 51 from the tube 55 side by the R surface. By the concentrated wall 55f, the circulating water from the tube 55 toward the injection port 51 is reinforced, and the high-speed flow of the inclined surface 3h1 and the curved surface 3h2 which are immediately behind the end wall 3h of the water tank 3 is formed. That is, the inclined surface 3h1 and the curved surface 3h2 form a concentrated space S with the front end wall 4b side of the rotary drum 4. In this way, the circulating water is discharged obliquely toward the upper side in the rotating drum 4, and a parabola is drawn while spreading to the left and right, and the rotating water is supplied from a relatively wide area through a long flying route. The washing in the drum 4.

However, as a concentrated passage of the high-speed flow, it is possible to form between the connecting end portion 55e of the connecting port 51a of the pipe 55 and the injection port 51. In other words, the circulating water flowing from the injection port 51 provided in the connection port 51a is guided to the side of the flow path 52, and is surrounded by a simple shape of the connection end portion 55e of the outward connection port 51a of the discharge side path 31b. In the form of a large discharge flow width in the circumferential direction of the circle, a sufficient discharge flow thickness in the forward and backward directions, or a discharge flow speed in which the splash distance can be increased, regardless of the amount of the washing material, The orientation of the appropriate action conditions. Moreover, the piping structure is not particularly complicated, and the risk of water leakage is not increased, and the cost is not increased.

Here, as shown in FIG. 4A, the front end wall 4b of the rotary drum 4 is slightly elliptical (including an elliptical shape) as seen from the front of the rotary drum 4. That is, the front end wall 4b has a front end wall diameter portion 4b1 and a front end wall diameter small portion 4b2. Therefore, when the rotary drum 4 rotates, the corresponding position of the injection port 51, that is, at the lowermost portion, the front end wall 4b of the rotary drum 4, as shown in Fig. 4B, the front end wall diameter portion 4b1 is located in the up and down direction, and can be moved to Below, on the other hand, as shown in Fig. 4C, the front end wall small portion 4b2 is located in the up and down direction and can be moved upward. When the front end wall diameter portion 4b1 is in the up and down direction, that is, when the front end wall 4b is moved downward at the corresponding position of the injection port 51, the front end wall 4b is located lower than the curved surface 3h2 of the front end wall 3h of the water tank 3. Therefore, when the circulating water is discharged from the annular outlet 53, it is suppressed by the curved surface 3h2, and as shown by the solid arrow D1, the circulating water is discharged toward the lower side of the rotary drum 4. Further, when the distal end wall small portion 4b2 is positioned in the vertical direction, that is, when the distal end wall 4b is moved upward at the corresponding position of the injection port 51, the distal end wall 4b is located higher than the curved surface 3h2 of the front end wall 3h of the water tank 3. Therefore, when the circulating water is discharged from the annular outlet 53, it is pushed up by the front end wall 4b, and as shown by the solid arrow D2, the circulating water is discharged toward the upper side of the rotary drum 4.

Therefore, the corresponding position of the injection port 51, that is, at the lowermost portion, when the front end wall 4b is at the lowest point, that is, when the front end wall diameter portion 4b1 is located in the up and down direction, as a starting point, the circulating water initially faces the rotating drum 4 Spit out. When the rotary drum 4 rotates, the front end wall 4b gradually rises, and the discharge direction of the circulating water also changes upward. When the starting point is rotated by 90°, the front end wall small portion 4b2 is positioned in the up and down direction, and the front end wall 4b reaches the top dead center. The circulating water is discharged to the top of the rotary drum 4. Further, as the rotary drum 4 rotates, the front end wall 4b is gradually lowered, and the discharge direction of the circulating water is gradually changed upward. When the starting point is rotated by 90°, the front end wall 4b reaches the bottom dead center, and the circulating water becomes the rotating drum. Spit out under 4. When the rotary drum 4 rotates, the above-described operation is repeated, and the discharge direction of the circulating water is always changed from the lower side to the upper side and the upper side to the lower side, and the circulating water is widely distributed in the rotary drum 4, so that the water can be efficiently supplied to the laundry. As a result, the dissolution effect, the washing effect, and the water rinsing effect of the lotion can be improved.

Further, for example, when the clothes are for a long time or when washing large pieces of clothes such as quilts and blankets, it is possible to avoid the circulation of only the water to the parts of the clothes, and it is possible to reduce the unevenness of the washing performance and the flushing performance of the water.

Further, as another example of the front end wall 4b of the rotary drum 4, as shown in Fig. 5, the surface of the front end wall 4b of the rotary drum 4 may be formed to have a slightly polygonal shape (including a polygonal shape) as seen from the front of the rotary drum 4. . Thereby, the rotary drum 4 rotates, and the apex direction of the polygonal shape of the front end wall surface, that is, the front end wall diameter large portion 4b3 approaches the annular outlet 53 of the circulating water, and the discharge direction faces downward. The center direction of the polygonal side, that is, the front end wall small portion 4b4 is close to the annular outlet 53 of the circulating water, and the discharge direction is upward. In this way, the circulating water can be uniformly sprayed onto the laundry. Further, when the rotary drum 4 is rotated once, the circulating water is discharged while being up and down depending on the number of vertices of the polygon. Therefore, the more the number of vertices of the polygon, the more the discharge direction is densely changed when the cylinder is rotated once.

In the above embodiment, the surface of the front end wall 4b of the rotary drum is formed in an elliptical shape or a polygonal shape when viewed from the front of the rotary drum 4. However, if the shape is not linear or symmetrical, such as an ellipse or a polygon, the distance from the rotation axis may be changed to at least two shapes by rotation of the rotary drum.

Further, in the present embodiment, the circulation pump 20 is provided on the table 2a at the bottom of the washing machine body 2, but the present invention is not limited to the embodiment. In order to circulate the washing water in the water tank 3, the circulation pump 20 may be provided in the lower portion 3b of the water tank 3 (see Fig. 1), and an effect equivalent to that of the embodiment can be obtained.

As described above, the present invention includes a rotary drum formed in a bottomed cylindrical shape, and a water tank disposed inside, and configured to be a front side from the front side of the opening toward the back side of the bottom, and the direction of the rotation axis is horizontal or Tilting downward from the horizontal direction; the motor drives the rotary rotating drum; the control unit controls the motor to perform at least one of the washing stroke or the water flushing stroke; and the water circulation system passes the washing water in the water tank The water circulation route connected to the water tank is circulated in the rotary drum by a circulation pump disposed on the water circulation route; the water circulation system has an injection port disposed inside the front wall of the water tank, and is formed in the front wall of the water tank and the rotary drum a flow path between the front end wall surfaces, and a front end wall surface of the rotating drum, having a shape which is changed by a rotation of the rotating drum from a distance of the rotating shaft center, and the circulating water sprayed from the injection port flows through the flow The road is spit out of the rotating drum.

According to this configuration, the circulating pump and the water circulation route are used to suck the water in the water tank and return the water to the water tank to circulate in the washing process or the water washing process, thereby improving the functions of washing or water washing. In particular, the water circulation route is only the end wall connected to the front wall of the water tank, and it is not necessary to connect the special piping formed in the flow path between the front end walls of the water tank and the rotary drum. Therefore, there is little risk of water leakage, and the circulating water is discharged into the rotary drum by a simple and inexpensive piping structure. In addition, even if the discharge port of the circulating water does not have a special shape or structure, the surface of the end wall before the rotating drum changes due to the distance from the rotation axis, and the rotating drum changes the discharge direction of the circulating water by the rotation. Therefore, it is not necessary to use a complicated structure, and regardless of the amount or kind of the laundry in the water tank, the circulating water can be uniformly sprayed on the laundry. Therefore, the cleaning power can be effectively improved while suppressing an unnecessary increase in cost.

Further, in the present invention, the front end wall surface of the rotary drum exhibits an elliptical shape as viewed from the front of the rotary drum. With this configuration, when the longitudinal direction of the ellipse of the surface of the rotating drum front end wall is close to the discharge port of the circulating water, the discharge direction faces downward. When the short-axis direction of the ellipse is close to the discharge port of the circulating water, the discharge direction is upward. Thereby, the circulating water can be uniformly sprayed on the laundry. In addition, when there are two long-axis directions and short-axis directions, the cylinder is rotated once, and the circulating water is discharged twice as it is up and down.

Further, in the present invention, the front end wall surface of the rotary drum exhibits a polygonal shape as viewed from the front of the rotary drum. With this configuration, when the vertex direction of the polygonal shape of the front end wall surface of the rotary drum is close to the discharge port of the circulating water, the discharge direction faces downward. When the center direction of the side of the polygon approaches the discharge port of the circulating water, the discharge direction faces upward. Thereby, the circulating water can be uniformly sprayed on the laundry. Further, when the cylinder is rotated once, the circulating water is ejected while changing up and down depending on the number of vertices of the polygon. Therefore, the more the number of vertices of the polygon, the more the discharge direction is densely changed when the cylinder is rotated once.

2. . . Washing machine body

2a. . . Platen

3. . . sink

3b. . . Lower part

3h. . . Front wall

3h1. . . Inclined surface

3h2. . . Curved surface

4. . . Rotating drum

4b. . . Front wall

4b1. . . Most of the front wall diameter

4b2. . . Front end wall diameter

4b3. . . Most of the front wall diameter

4b4. . . Front end wall diameter

4c. . . Rotating axis

5. . . motor

6. . . Fluid balancer

6a. . . rib

7. . . Water supply system

7a. . . Lotion accommodating department

8. . . Drainage system

8a. . . Drain pipe

8b. . . Drainage filter

9. . . Drying system

10. . . Air supply filter

12. . . Blower

13. . . Opening

14. . . Sealing material

16. . . water circulatory system

19. . . Drain valve

20. . . Circulating pump

20a. . . impeller

20b. . . Pump housing

20c. . . Circulating motor

20d. . . Motor housing

20d1. . . Bearing partition

20e. . . Motor shaft

20f. . . Attraction

20g. . . Spit

twenty one. . . Operation panel

twenty two. . . Control department

31. . . Water cycle route

31a. . . Inflow side route

31b. . . Spit side route

35. . . Mount

35a. . . Mounting piece

40. . . Switch door

51. . . Injection port

51a. . . Connector

51c. . . Barrier wall

52. . . Flow path

53. . . Ring outlet

54. . . Opening

55. . . tube

55a. . . Front member

55b. . . Rear member

55c. . . Connecting pipe

55d. . . Connection end

55e. . . Connection

55f. . . Concentrated wall

56. . . Sealing member

57. . . Screw

A. . . Solid arrow

B. . . Chain arrow

C. . . Dotted arrow

D. . . Solid arrow

D1, D2. . . Solid arrow

S. . . Concentrated space

Fig. 1 is a cross-sectional view showing a drum type washing machine in accordance with a first embodiment of the present invention.

Fig. 2A is a cross-sectional view of a circulation pump of the same type of drum type washing machine.

Fig. 2B is a side view of the circulation pump of the drum type washing machine.

Fig. 2C is a bottom view of the circulation pump of the drum type washing machine.

Fig. 3A is a front view showing a pipe connecting the sink to the discharge side route of the water circulation route of the drum type washing machine.

Fig. 3B is a cross-sectional view showing a pipe connecting the sink to the discharge side route of the water circulation route of the drum type washing machine.

Fig. 3C is a longitudinal sectional view showing a pipe connecting the water tank to the discharge side route of the water circulation route of the drum type washing machine.

Fig. 4A is a front view showing the rotary drum of the same drum type washing machine.

Fig. 4B is a longitudinal sectional view showing the relationship between the rotary drum and the water receiving groove of the drum type washing machine.

Fig. 4C is a longitudinal sectional view showing another relationship between the rotary drum and the water receiving groove of the drum type washing machine.

Fig. 5 is a front elevational view showing the other rotating drum of the drum type washing machine.

4. . . Rotating drum

4b. . . Front wall

4b1. . . Most of the front wall diameter

4b2. . . Front end wall diameter

4c. . . Rotating axis

6. . . Fluid balancer

6a. . . rib

10. . . Air supply filter

Claims (4)

A drum type washing machine comprising: a rotating drum formed in a bottomed cylindrical shape; a water tank disposed inside and configured to be from a front side of the opening toward a back side of the bottom, the direction of the rotating shaft being horizontal or horizontal The motor is driven to rotate the rotating drum; the control unit controls the motor to perform at least one of a washing stroke or a flushing stroke; and the water circulation system connects the washing water in the water tank through the connection. The water circulation route of the water tank is circulated in the rotating drum by a circulation pump disposed on the water circulation route; the water circulation system has an injection port disposed in an end wall of the water tank before the water tank, and an end wall formed on the front wall of the water tank a flow path between the inside and the front end wall surface of the rotating drum, and the front end wall surface of the rotating drum exhibits a shape that changes from the rotation axis by the rotation of the rotating drum, and is sprayed from the foregoing The circulating water sprayed from the port is discharged into the rotating drum through the aforementioned flow path. The drum type washing machine of claim 1, wherein the front end wall surface of the rotating drum has an elliptical shape when viewed from the front of the rotating drum. The drum type washing machine of claim 1, wherein the front end wall surface of the rotating drum has a polygonal shape when viewed from the front of the rotating drum. The drum type washing machine of claim 1, wherein the front end wall surface of the rotating drum is present, and the distance from the rotating shaft center is changed to at least two shapes by the rotation of the rotating drum.