JP2009213800A - Drum washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent lint from intruding the water suction side of a circulation route and a circulation pump by leaving the lint inside a water tub with a filter when circulating water of the water tub, and to drain the lints left in the water tub without clogging the filter. <P>SOLUTION: A rotary drum 4 is arranged inside the water tub 3 while making the rotary axial direction be horizontal or inclined, and be driven by a motor 5, thereby performing one of a washing step or a rinsing step. The washing machine includes: a water circulation function for circulating the water of the water tub 3 by sucking and returning with the use of the circulation route 31 and the circulation pump 20; and the filter 32 facing the water tub 3 and filtering the suction water. In the washing step, the rotary drum 4 is driven alternately between a forward/backward continuous rotary driving mode and a forward/backward arcuate rotary driving mode at a prescribed number of rotations for a prescribed time. The circulation pump 20 is stopped for the prescribed time during the forward/backward reverse rotary operation of arcuate rotation. <P>COPYRIGHT: (C)2009,JPO&INPIT

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 water in a water tank with a circulation pump is already known (see, for example, Patent Documents 1 to 4).

  Patent Document 1 uses a single pump as a circulation pump in the washing process and the rinsing process, circulates rinsing water and washing water, and actively stirs the detergent and the washing water in the early stage of the washing process, so that the detergent dissolves quickly, The technique used as a drainage pump is disclosed in the dehydration and drainage processes, and a filter case is provided in the middle of the circulation pump suction side of the circulation path to collect impurities in the suction water. This prevents impurities from entering the circulation pump.

  Patent Document 2 prevents the phenomenon that detergent is gathered in a heater installation space or a specific space by circulating water in a water tank with a circulation pump, and at the same time, the laundry is quickly heated before washing, thereby washing efficiency. The technology which can improve is disclosed.

  Patent Document 3 circulates washing water in an aquarium by providing a circulation pump unit including a circulation pump unit and a filtering unit that captures laundry waste of yarn waste on a base plate that is the bottom of an outer box of a washing machine. In order to do this, it is provided on the base plate via an elastic cushion, preventing the vibration of the pump motor from propagating to the base plate, and as a result, the noise caused by the resonance of the vibration of the pump motor and the vibration of the outer box can be prevented. Such a technique is disclosed.

  Patent Document 4 discloses a technology in which water in a water tank is added to a rotating drum and sprayed around a drying heater to remove lint attached around the heater.

On the other hand, Patent Document 5 forms a dehumidification pipe line that accommodates a heat exchanger adjacent to a water tank, and the dehumidification pipe line is formed in the water tank by an exhaust port that is opened from the inside of the water tank in a tangential direction in the rotation direction of the rotating drum. Disclosed is a technique for washing off the lint that adheres to the heat exchanger and the like when the rotating drum is rotated in the rinsing process, and the water stored in the water tank jumps up and flows into the dehumidifying duct from the exhaust port. ing. For this washing, if the rotating drum is controlled to rotate at a predetermined number of revolutions while a predetermined amount of water is stored, the water stored in the water tank is spun up by the rotation of the rotating drum, and the dehumidifying means is accommodated from the exhaust port. It can be made to flow into the room. Further, the dehumidifying means and the like can be washed with clean water in the rinsing process.
Japanese Patent Application Laid-Open No. 11-276791 JP 2005-58741 A JP 2006-223572 A JP 2006-239142 A JP 2005-124759 A

However, Patent Document 2 does not describe the use of a filter to circulate the water in the aquarium, and in this state, washing water or rinsing waste tends to bite into the pump and cause malfunctions, and maintenance is frequently performed. Necessary. As described in Patent Documents 1 and 3, a filter case is provided in the middle of the circulation pump suction side of the circulation path for collecting the water in the water tank by a circulation pump to collect and capture lint. Therefore, although there is an advantage that the lint in the water tank is reduced, it cannot be denied that it becomes a cause of being caught or clogged in the circulation pump suction side passage. In addition, to reduce the number of maintenance operations as much as possible, a filter area that is not easily clogged with collected and captured lint, and a size that allows collection of a certain amount of collected and captured lint, is required. However, there is a problem that it becomes complicated and large.

  The main object of the present invention is to circulate the water in the aquarium with a circulation pump, leaving the lint in the aquarium in the aquarium with a filter to prevent the lint from entering the water absorption side and the circulation pump. Another object of the present invention is to provide a drum type washing machine in which yarn waste remaining in a water tank is not clogged in a filter and is discharged during drainage.

  In order to achieve the above object, a drum-type washing machine according to the present invention is configured such that a rotating drum formed in a bottomed cylindrical shape has a horizontal or horizontal rotation axis direction from an opening front side toward a back side as a bottom. In the drum-type washing machine that is installed in the water tank so as to be inclined downward from the water and drives at least one of the washing process and the rinsing process by driving the rotating drum with a motor, the water in the water tank is drained by a circulation path and a circulation pump. A water circulation function that sucks and circulates back into the water tank; and a filter that filters the water that is located in the water tank and is sucked into the circulation path, and at least one of a washing process and a rinsing process includes the motor , And the rotating drum is continuously rotated at a rotation speed showing a behavior in which the laundry lifted by the rotation of the rotating drum falls from a height where its own weight is superior. In the continuous rotation drive mode, the forward and reverse continuous rotation drive mode in which continuous rotation of the rotating drum is alternately repeated in the forward and reverse directions, and the motor is suddenly driven to cause the rotating drum to rotate rapidly, and the rotating drum rapidly rotates. After the laundry is attached to the inner surface of the rotating drum by the centrifugal force due to and lifted from the lowest position of the rotating drum to a position of more than 90 degrees and less than 180 degrees, by sudden braking of the rotation of the motor, A forward / reverse arc rotation drive mode in which the laundry is peeled off from the inner surface of the rotating drum due to its inertia and its own weight and dropped to the side opposite to the lifting side of the lower range of the rotating drum is alternately forward and reverse. The circulation pump is stopped for a predetermined time during the forward / reverse inversion operation of the arc rotation of the rotary drum in the forward / reverse arc rotation drive mode. To have.

In such a configuration, at least one of the washing process and the rinsing process is performed by driving the rotating drum to forward and reverse arc rotation at a predetermined angle to lift the laundry to a predetermined angle, and the laundry is subjected to sudden braking by forward / reverse switching. It is possible to peel off from the inner surface of the rotating drum due to inertia and its own weight and drop it to the opposite side to the lifting side by its own weight. It is difficult to obtain in the forward / reverse arc rotation drive mode by repeating washing alternately to the left and right by continuously washing and enhancing the cleaning effect and by continuously rotating the laundry to one side by the forward / reverse continuous rotation drive mode. Rotation to perform laundry by reducing the imbalance of applying mechanical force to the laundry in the forward and reverse arc rotation drive mode while realizing the interchange of the upper and lower of the laundry While giving an effective washing behavior against uniform and strong stains according to time, the water circulation path in the aquarium and the water circulation operation by the circulation pump allow the detergent to dissolve and contact the water in the aquarium with the laundry Can be activated and improve the washing function. Moreover, since the circulating water is filtered by a filter facing the water tank, it is possible to avoid lint from entering the circulation path and the circulation pump, and the water flow in the water tank sucked into the circulation path through the filter is Since it is always disturbed by the accompanying flow accompanying the rotation, forward / reverse reversal of the continuous rotation of the rotating drum, and forward / reverse rotation of the arc rotation, it is possible to suppress adsorption and accumulation to the extent that the filter is clogged. In particular, the effect of water disturbance due to frequent forward / reverse rotation of the rotating drum during forward / reverse arc rotation and alternately lifting the laundry left and right is high in the aquarium and in the rotating drum. By stopping the circulation pump for a period of time and stopping the suction of water through the filter, the lint attached to the filter and the laundry is reliably suspended in the water in the aquarium and the rotating drum, and when draining. Since it is easy to be discharged and the contact efficiency of the laundry with water in the forward / reverse arc rotation drive mode is high, the influence on the washing efficiency due to the circulation pause can be suppressed.

  In the above, the second rotation number may be about 100 to 200 rpm. Thereby, the washing efficiency and the rinsing process are combined, and the discharge efficiency due to the wastewater discharge of the yarn waste that increases in the latter half can be remarkably increased.

  In the above, the washing process may be characterized in that the duty ratio of turning on and off the circulation pump is reduced with the passage of operation time. As a result, in the first half of the washing process, a sufficient ON ratio of the circulation pump is ensured, and the washing liquid, which is important for the washing action, is quickly penetrated into the laundry such as clothes, and the laundry mechanical force is wetted. As the operating time elapses, the duty ratio of turning on and off the circulation pump is reduced to increase the floating rate of lint in the water tank and rotating drum in the water. Emission efficiency due to drainage at the end of the process can be increased

  In the above, the washing process may be characterized in that the rotational speed of the circulation pump is reduced as the operation time elapses. As a result, in the first half of the washing process, the rotation speed of the circulation pump is sufficiently secured, and the washing liquid, which is important for the washing action, is quickly penetrated into the laundry such as clothes, and the washing machine is wetted to roll the mechanical force. By reducing the number of rotations of the circulation pump as the operation time elapses, the floating rate of lint in the water tank and rotating drum in the water can be reduced while continuing the water circulation. It is possible to increase the discharge efficiency due to the drainage at the end of the rinsing process.

  Further objects and features of the present invention will become apparent from the following detailed description and drawings. Each feature of the present invention can be employed alone or in combination with other features as much as possible.

  According to the present invention, in the washing process, the laundry is lifted to the left and right sides by forward and reverse arc rotation drive and dropped to the other side at the time of rotation reversal. Repeating the left and right turns of the laundry by continuously acting and mechanical force to achieve effective tapping and continuously lifting and dropping the laundry to one side by forward and reverse continuous rotation. By reducing the imbalance of applying mechanical force to the laundry in the forward and reverse arc rotation drive mode, it gives an effective washing behavior against uniform and strong dirt depending on the rotation speed and time for executing them. However, the washing function can be enhanced by promoting the penetration of the detergent, the contact of the water with the laundry, and the penetration by the water circulation operation in the water tank. Since the circulating water is filtered by a filter facing the inside of the water tank, the yarn waste does not enter the circulation path and the circulation pump, and the maintenance of the circulation path and the circulation pump becomes unnecessary. In addition, the suction flow through the circulating water filter is always disturbed by the accompanying flow accompanying the rotation of the rotating drum, the forward / reverse rotation of the continuous rotation of the rotating drum, and the forward / reverse rotation of the arc rotation. Impairing the circulation function is avoided. In particular, during forward and reverse arc rotation, frequent forward and reverse reversal of the rotating drum and lifting and dropping the laundry alternately left and right without taking advantage of the positive contact between the laundry and water without reducing the washing effect Combined with the fact that the circulating pump is stopped for a predetermined time during forward / reverse arc rotation and no lint is attached to the filter while demonstrating high water turbulence effect in both the water tank and the rotating drum. Specially related to lint in the water tank and the rotating drum including the filter. Maintenance is unnecessary. For this purpose, it is preferable to end the washing process and shift to drainage while executing the forward / reverse arc rotation drive mode while the circulation pump is stopped.

  In addition to the above, since the washing performance is not questioned in the rinsing process, the circulation pump is stopped to eliminate the attachment of the yarn waste to the filter due to water absorption, and the inner surface of the laundry rotating drum of the yarn waste By driving the rotating drum at a second rotational speed higher than that attached to the filter, not only the lint attached to the filter is washed away at a higher speed of the accompanying flow, but also lint in the water tank and the rotating drum. By improving the floatability that is actively separated from the clothing of the kind and improving the drainage efficiency by drainage, it is possible to eliminate the need for maintenance corresponding to the lint in the filter, water tank, rotating drum, and laundry By minimizing the required amount of water stored in the water tank with increased contact with water by lifting and dropping, the sufficient rinsing effect can be satisfied and the driving load of the rotating drum can be reduced.

  Hereinafter, a drum type washing machine according to an embodiment of the present invention will be described with reference to FIGS. 1 to 10 for the understanding of the present invention. In addition, the following description is a specific example of this invention, Comprising: The content of description of a claim is not limited.

  The drum type washing machine according to the present embodiment automatically controls the motor 6, the water supply system 7, the drainage system 8, and the drying system 9 shown in FIG. 9 according to the mode setting and control program to at least the cleaning process, the rinsing process, and the dehydrating process. A so-called drum-type washing and drying machine having a function of performing a drying process is configured. However, the drying system 9 can be omitted. In addition to the above, the water in the water tank 3 is circulated in the water circulation system 16 as necessary at the time of the cleaning preparation process, at the time of the cleaning 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. The drying system 9 is a thread in the air introduced from the water tank 3 and the rotating drum 4 in a drying circulation path in which the air in the water tank 3 and the rotating drum 4 is circulated by the blower 12 as indicated by broken arrows in FIGS. A filter 15 that collects and removes dust and the like, a dehumidifying unit 10 that dehumidifies the introduced air after dust removal, a heating unit 11 that heats the air after dehumidification to make dry high-temperature air, and the blower 12 is a heating unit 11 is arranged downstream of the main body 11 to make it less susceptible to moisture. In the illustrated example, the dehumidifying unit 10 and the heating unit 11 are an evaporator and a condenser that circulate refrigerant through a compressor 17 and exchange heat with circulating air, and constitute an air conditioner 18. However, it is not limited to this. Further, the circulation system 16 repeatedly sucks the 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 washing, dehydration, and drying.

The rotating drum 4 is installed with the motor 5 on the water tank 3 directly connected to the rotating shaft 4a, and with the water tank 3, the rotating shaft direction is inclined from the horizontal direction to the angle θ = 20 ± 10 degrees from the opening side to the bottom side. However, even when the rotating drum 4 is installed at the same height as compared with the case of installation in the horizontal direction, washing is performed without taking an unreasonable posture where the water tank 3 and the opening of the rotating drum 4 are bent obliquely upward. You can easily put things in and out. In particular, from the experience of the present inventors, by setting the inclination angle to 20 ± 10 degrees, even if there is a height difference from children (excluding infants) to adults, even wheelchair users, It is possible to obtain a state in which the work in and out is most easily performed. Further, there is an advantage that a deep water storage state can be obtained even with a small amount of water because water supplied into the rotating drum 4 is accumulated on the back side. The water tank 3 is provided to have the same inclination as that of the rotating drum 4 and along the vicinity thereof in order to make water supply work efficiently on the laundry in the rotating drum 4. The washing machine main body 2 is provided with an opening / closing door 5 so that the opening 13 of the water tub 3 can be sealed and opened via a sealing material 14 attached to the mouth edge thereof.

  The rotating drum 4 is driven because the dewatering process is performed by continuous rotation at a high speed of, for example, 1000 rpm, so that the laundry is tangled, twisted and twisted in the washing process and the rinsing process. By sticking on the inner surface of 4 and brazing, it is difficult to take out the laundry, and post-processing is troublesome. In addition, it is easy to leave hard wrinkles on the laundry, and it takes a lot of time to remove the wrinkles.

  In order to solve this problem, in the present embodiment, in the washing process, or in the washing process and the rinsing process, it is intended that the occurrence of entanglement and twisting is greatly improved, and the function of mechanical force is enhanced, so that wrinkles are hardly generated. The forward and reverse arc rotation driving mode (dancing mode) indicated by D in FIG. 10 and the rotation of the rotating drum 4 are repeated. A forward / reverse continuous rotation drive mode (tumbling mode) indicated by T in FIG. 10 repeats continuous rotation of the rotating drum 4 alternately at forward and reverse speeds at a rotational speed showing the behavior of the lifted laundry falling from a height where its own weight wins. In the washing process or the washing process and the rinsing process, 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 is caused by 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. Therefore, it is possible to give a particularly high unraveling action to laundry that is sufficiently swollen, loose, and slippery, and can exert a mechanical force on the laundry, thereby improving the washing performance. 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, because of the high unraveling action, it is possible to suppress the entanglement between the laundry caused by the progress of the washing and rinsing process, so that effective tapping washing in the forward and reverse arc rotation mode is continuously performed, the washing effect and The rinsing effect can be enhanced. In FIG. 10, the longer stop time is set between the normal / reverse continuous rotation drive mode and the normal / reverse arc rotation drive mode in the normal / reverse continuous rotation drive mode and the normal / reverse arc rotation drive mode. In switching, a unique washing behavior is achieved for each driving mode without being affected by different driving modes.

  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 / reverse arc rotation drive mode, two different behaviors for the laundry being washed and rinsed depending on 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.

  In the drying process, in particular, when the forward / reverse arc rotation drive mode is executed, it is suitable for stretching the wrinkles of the laundry after dehydration, and the finishing quality can be greatly improved and the post-finishing can be greatly reduced. However, since the laundry in the drying process may be light and difficult to stick to the inner surface of the rotating drum 4, the rotation angle of the rotating drum 4 is preferably set to 90 ° or more and less than 200 °.

  The maximum rotation speed of the rotating drum 4 in the forward / reverse continuous drive mode may be 45 ± 5 rpm as usual, and the maximum rotation speed of the rotating drum 4 in the forward / reverse arc rotation drive mode is 40 rpm or more in the washing and rinsing process, after dehydration Is preferably 50 rpm or more.

  By the way, as described above, in order to circulate the water in the water tank 3, the circulation pump 20 is installed on the base plate 2a which is the bottom of the washing machine main body 2. Referring to FIG. The water circulation path 31 connecting the water tank 3 and the water tank 3 can absorb the change in the distance between the connection positions of the fixed-side circulation pump 20 fixed to the base plate 20 and the vibration-side water tank 3 and the position fluctuation. As a result, the hose is connected by a stretchable or flexible hose, and the hose is deteriorated at an early stage due to repeated vibration and vibrational expansion and contraction, and water leakage occurs.

  Therefore, in the present embodiment, the function of preventing the waste from entering the water absorption side path 31a and the circulation pump 20 of the water circulation path 31 of the yarn waste that does not require maintenance to circulate the water in the water tank 3 by the circulation pump 20 is provided. The circulation pump 20 that circulates the water in the water tank 3 through the water circulation path 31 in order to make the water circulation path 31 between the circulation pump 20 and the water tank 3 unnecessary for elasticity and flexibility is shown in FIG. As shown in FIGS. 3 and 9, the water tank 3 is provided. In addition, the filter 32 for filtering the water to be circulated is provided in the water suction 33 at the time of water circulation in the water tank 3 as shown in FIG. In this way, when the circulation pump 20 is on the water tank 3, the water circulation path 31 connected to and connected to each other is located on the same water tank 3 together with the circulation pump 20. It is possible to avoid a change in the distance between the positions and occurrence of position shake. Further, since the water circulation path 31 only has to circulate water between the water tank 3 and the circulation pump 20 on the water tank 3, the water tank 3 can be used in a washing process or a rinsing process with a short and advantageous piping structure. The water inside can be circulated. In addition, the circulation pump 20 does not become a vibration source that increases the vibration exerted on the water tank when driven with the uneven distribution of the laundry of the rotary drum 4, and can exert a damping action corresponding to the weight on the water tank 3. Furthermore, the filter 32 is provided in the water suction part 33 from the water tank 3 of the water circulation path 31, and the yarn waste can be prevented from entering the water absorption side path 31 a of the water circulation path 31 as well as the circulation pump 20.

  As a result, the circulation pump 20 and the water circulation path 31 are both on the water tank 3, avoiding distance changes and position fluctuations caused by vibration of the water tank 3 between the connection positions, the water circulation path 31 is short, and the piping structure is simple. Can use materials that do not require elasticity and flexibility, and have excellent vibration resistance, specifically resin molded products, which are simple and not bulky, have low cost and high durability. The function of the washing machine can be enhanced by circulating the water in the water tank 3. In addition, the circulation pump 20 can suppress an increase in vibration of the water tank 3 by a vibration control action by weight rather than a vibration source to the left of the water tank 3, thereby ensuring a quiet operation and preventing a decrease in life. For that purpose, it is preferable to attach to the lower part of the circumferential direction and the axial direction with a good weight balance with respect to the water tank 3. Further, the filter 32 is located in the water suction portion 33 from the water tank 3 of the water circulation path 31 to prevent the lint from entering the water absorption side path 31a of the water circulation path 31 as well as the circulation pump 20, and the water absorption side path. Since the water circulation system 16 is not clogged, damaged, or broken by being caught, accumulated, or bitten in the internal pump 31a or the circulation pump 20, it can be circulated without special maintenance for the yarn waste and the filtrate storage part. Operation safety and stability can be ensured for a long time.

As shown in FIG. 1, the circulation pump 20 is applied to the bottom 3 b of the water tank 3 from below and fixed with a bolt 34 or the like, and the discharge side path 31 b from the circulation pump 20 of the water circulation path 31 is the opening 13 of the water tank 3. 1, 3, and 9, the front side of the washing machine body 2 is positioned with an upward inclination of 20 ° or more with respect to the horizontal direction. Specifically, as shown in FIG. 2, the circulating pump 20 has a resin-made pump casing 20b in which an impeller 20a is accommodated, and a bearing partition wall 20 at the front end of a metallic motor casing 20d of the circulating motor 20c.
The impeller 20a is integrated by being applied to d1, and the impeller 20a is directly connected to the motor shaft 20e. The impeller 20a is fitted on a resin mounting seat 35. The mounting seat 35 has substantially C-shaped mounting pieces 35a at three places around the mounting seat 35, and these mounting pieces 35a are fitted into bosses 3c projecting downward from the bottom 3b of the water tank 3 as shown in FIG. The bolt 34 is screwed into the boss portion 3c to fasten the attachment piece 35a to the boss portion 3c, whereby the circulation pump 20 is attached to the bottom 3b of the water tank 3 from below, and the circulation motor 20c has the axis of the circulation pump 20 oriented vertically. Even if it is located above the pump casing 20b, it does not get in the way.

  Thereby, the circulation pump 20 can be easily attached / detached from the lower side of the water tank 3 at the time of maintenance, and the discharge side path 31b is passed from the lower circulation pump 20 below the bottom part 3b on the rear side of the washing machine body 2 of the water tank 3 to the washing machine. In order to extend toward the front part of the main body 2 with an upward inclination of 20 ° or more with respect to the horizontal direction, the water tank is realized by the inclination along the rotating drum 4 of the water tank 3 or the shortest pipe along the cylindrical shape. 3, when the circulation pump 20 absorbs water through the water absorption side passage 31a, sends it into the discharge side passage 31b and discharges it into the water tank 3, the inclined discharge side passage 31b is connected from the pump casing 20b to the discharge side passage 31b. It is possible to smooth out the air and prevent the so-called air smear phenomenon that the circulating pump 20 entrains air into the water absorption in the pump casing 20b. Therefore, in the unlikely event that the circulation pump 20 is in maintenance, it is at a lower position below the bottom of the water tank that it extends at a predetermined angle toward the front of the washing machine in the discharge side passage 31b with an upward inclination. It is realized from the circulation pump 20 by the inclination of the water tank 3 or the piping along the cylindrical shape without complicating the structure, and the discharge side path 31b from the pump casing 20b when the circulation pump 20 circulates the water in the water tank 3 The air can be smoothly removed from the air, the air can be prevented from being squeezed in the pump casing of the circulation pump to avoid discharge failure, and more stable circulation can be ensured. Here, when the inclination angle of the rotating drum 4 is 20 ° ± 10 °, if the upward inclination is 20 ° or more, the outlet path 31b may be set to a condition that exceeds the inclination angle of the rotating drum 4. If the curved shape of the cylindrical surface in the circumferential direction 3 is used in combination, the shortest pipe that is not separated from the water tank 3 can be formed.

  In addition, the circulation pump 20 is slightly inclined according to the inclination of the water tank 3 as shown in FIG. 3 in the illustrated example. However, the circulation pump 20 is integrated with the lower part of the pump casing 20b whose axis is vertically oriented, specifically, the lower part. Water is sucked through the molded L-shaped suction port 20f and discharged from the peripheral wall, specifically through the discharge port 20g integrally formed in the tangential direction. The pump casing 20b and the lowermost part 31c of the water circulation path 31 are shown in FIG. As shown in FIG. 9, it is positioned higher than the drainage valve 19 provided in the drainage path 8a of the drainage system 8 that drains the water in the water tank 3 to the outside, and is equal to or lower than the same level upstream of the drainage valve 19 in the drainage path 8a. It leads to the height position. That is, the pump casing 20b and the lowermost part 31c of the water circulation path 31 are at the same level as that or extend downward to be connected to the upstream position of the drain valve 19 in the drain path 8a. This is a condition for the water in the pump casing 20b and the water circulation path 31 to naturally flow from the lowermost part 31c common to them into the drainage path 8a when the drain valve 19 is opened.

  Thereby, the drain valve 19 is provided on the condition that the water in the water tank 3 can be drained and drained through the drain path 8a, whereas the circulation pump 20 sucks in from the lower part of the pump casing 20b whose axis is directed vertically, and from the peripheral wall. The pump casing 20b and the lowermost part 31c of the water circulation path 31 under the discharge conditions become places where the residual water in them is naturally circulated, and the height of the same or lower level upstream of the drain valve 19 in the drain path 8a. By being connected to this position, at the time of draining with the drain valve 19 opened, the water remaining in the water circulation path 31 and the circulation pump 20 is naturally drained through the drain path 8a. Therefore, the water circulation path 31 including the circulation pump 20 drains the remaining water inside the water drainage in the water tank 3, and does not require a single drainage structure or drainage control.

Here, the drainage path 8a and the water circulation path 31 are as shown in FIG.
The water receiving case 37 for receiving water from the drain port 36 and the water suction portion 33 to which a is connected is formed integrally and shared with the water receiving case 37 and the water absorption piping area 37a to the circulation pump 20 side and the drainage path. A drain piping area 37b to the 8a side is provided. As a result, water absorption from the water suction portion 33 of the water tank 3 and drainage from the drain port 36 are received by the water absorption piping area 37a and the drainage piping area 37b formed in one water receiving case 37, and the water receiving structure, seal While the structure is simplified, the water absorption received by the water absorption piping area 37a corresponds to the water absorption to the circulation pump 20 through the water absorption side path 31a, and the water discharge received by the drainage pipe area 37b corresponds to the drainage through the drainage path 8a. During drainage, the remaining water from the water circulation path 31 and the circulation pump 20 is naturally drained to the drainage path 8a through the drainage piping area 37b. As a result, the water absorption from the water suction portion 33 of the water tank 3 and the drainage from the drain port 36 are received by the water absorption piping area 37a and the drainage piping area 37b of the single water receiving case 37, which is simple and low cost. A water receiving structure and seal structure advantageous for maintenance are simplified, and the water circulation path 31 and the circulation are performed during drainage while supporting water absorption into the circulation pump 20 through the water absorption piping area 37a and drainage through the drainage piping area 37b. The residual water of the pump 20 can be naturally drained into the drainage path 8a through the drainage piping area 37b, and a special residual water treatment can be made unnecessary.

  For this drainage, in the illustrated example, as shown in FIG. 3, in the illustrated example, the water receiving case 37 is a communication in which the water absorption piping area 37a and the drainage piping area 37b are provided in a portion corresponding to the lowermost portion 31c of the partition wall 37c. A check valve 38 having a check function is provided in the communication hole 37d from the drainage piping area 37b side to the water absorption piping area 37a side. By such a check function of the check valve 38 from the drainage pipe area 37b side to the water absorption pipe area 37a side, the water suction portion 33 is connected to the circulation pump 20 through the filter 32, the water absorption pipe area 37a, and the water absorption side path 31a. At the time of water absorption, water mixed with yarn waste does not flow from the drainage piping area 37b side to the water absorption piping area 37a side, and the water in the water tank 3 can be circulated by the circulation pump 20 without any problem. Moreover, when draining from the drainage path 8a through the drainage pipe 37b when the drainage valve 19 is opened, the residual water in the water circulation path 31 and the pump casing 20b opens the check valve 38 of the communication hole 37d to open the drainage pipe area 37b. Since it flows to the side, it does not interfere with natural drainage. As a result, the check function from the drainage piping area 37b side to the water absorption piping area 37a side of the check valve 19 does not particularly complicate the structure, and the filter from the water suction portion 33 and the water absorption piping area 37a to the circulation pump 20 is provided. Drainage from the drainage path 8a through the drainage pipe area 37b through the drainage port 36 from the drainage port 36 with the drainage valve 19 opened while achieving water absorption through the drainage pipe area 37b without the influence of water mixed with lint. Occasionally, the residual water in the water circulation path 31 and the pump casing 20b opens the check valve 38 and flows into the drain piping area 37b and is naturally drained, so that no special residual water treatment is required.

However, the present invention is not limited to this, and the water receiving case 37 has a predetermined range of the partition wall 37c, specifically an area larger than the communication hole 37d, and the water absorption piping area 37a and the drainage piping area 37b communicate with each other. In addition, a strainer portion that is provided with a filter (not shown) or that is integrally formed may be provided in the communication portion. As a result, there is no check valve in the communication portion between the drainage piping area 37a and the water absorption piping area 37b, and the water absorption action from the circulation pump 20 extends not only to the water absorption piping area 37a but also to the drainage piping area 37b. Since the drain valve 19 is closed, it does not extend downstream from the drain valve 19 in the drain path, and in addition to the water absorption through the filter 32 and the water absorption piping area 37a from the water suction portion 33, the drain port 36, the drain piping Water absorption through the region 37b and the filter and strainer in the communication portion is also performed in parallel, and the water absorption resistance can be reduced without intrusion of yarn waste. In addition, when draining from the drainage path 8a through the drainage piping area 37b when the drainage valve 19 is opened, residual water in the water circulation path 31 and the pump casing 20b passes through a filter or strainer in the communication portion, but is mixed with lint. Therefore, the thread waste is not filtered and trapped in the water absorption pipe area 37a, but flows to the drain pipe area 37b, so that it is not prevented from being drained naturally. As a result, the filter from the water suction part 33 and the water suction pipe area 37a to the circulation pump 20 has a simpler structure than a check valve in which a filter and a strainer part are provided at the communication part between the drainage pipe area 37a and the water suction pipe area 37b. In addition to water absorption through 32, drain port 36, drain piping area 37b
The water absorption resistance can be reduced without invasion of yarn waste by the water absorption through the communication part from the water to the circulation pump 20, its filter and strainer, and the water absorption pipe area 37a, and the drainage pipe area when the drain valve 19 is opened. When draining from the drainage path 8a through 37b, the residual water in the water circulation path 31 and the pump casing 20b is filtered without passing through the filter or strainer in the communication section and captured in the water absorption piping area 37a. Even if the adhering yarn waste at the time of water absorption does not flow into the drainage but still adheres to the drainage piping area 37b side of the filter or strainer, it flows into the drainage piping area 37 side and is drained naturally so as to backwash it. As a result, special maintenance for the residual water, the yarn waste remaining in the water absorption path 31a, and the drainage path 8a can be made unnecessary.

  Further, as shown in FIG. 3, the water suction portion 33 and the filter 32 are located higher than the drainage port 36 to which the drainage path 8 a in the water tank 3 is connected and less than the minimum water level during water circulation, It is assumed that it is provided with a configuration that does not hinder the flow of water to the drain 36. In the illustrated example, the filter 32 is fitted into a water suction portion 33 that is opened immediately above the drain port 36 that is open to the lowest portion 3 d of the peripheral wall of the water tank 3, and the substantially flat upper surface is slightly higher than the inner surface of the peripheral wall of the water tank 3. It has a form and satisfies the condition that the flow of water to the drain port 36 is not blocked. For this purpose, the filter 32 may have a circular or elliptical shape in plan view and swell upward in a dome shape or a mountain shape. However, the filter surface may be formed by a height below the minimum water level, that is, drainage from the minimum water level. It is preferable to limit the height to receive a washing action described later by the flow of water during drainage.

  In this way, the water suction portion 33 and the filter 32 are located above the drain port 36 of the water tank 3 and below the lowest water level during water circulation, and the flow of water in the water tank 3 to the water drain port 36 is By having a form that does not hinder, even if lint is attached to the surface of the filter 32 because the filter 32 is not isolated from the water tank 3 while filtering, the water in the water tank 3 is reduced during drainage. It is washed away by being exposed to the flow or the flow toward the drain port 36, and together with the yarn waste that may adhere when a filter or strainer is provided in the drain piping area 37b, it is mixed with the waste water and discharged. Therefore, it is avoided that the lint is accumulated in the filter unit every time the circulation operation is performed. As a result, it is possible to eliminate the need for special maintenance for residual water, yarn waste remaining in the water absorption side path 31a, and the drainage path 8a.

  Further, as shown in FIG. 3, the filter 32 of the water suction portion 33 forms a cover space 41 that is larger than the water suction port 39 that opens to the water suction portion 33 and is connected to the water supply side path 31 a to cover the water suction port 39. ing. As a result, the filter 32 cooperates with the inner cover space 41 to secure a water passage area larger than the water inlet 39, and the entire water passage area communicates with the water inlet 39 through the cover space 41. Clogging is less likely to occur during passage of water by a larger amount than the opening 39, and combined with washing by the water flow generated in the water tank, pressure loss due to clogging can be suppressed, and a predetermined flow rate can be easily secured during circulation. For this purpose, the total opening area of the filter 32 of the water suction portion 33 is preferably set to be larger than the opening area of the water inlet 39. Thereby, in the water flow area larger than the water suction port 39 of the filter 32, a total opening area larger than the opening area of the water suction port 39 can be secured, and clogging prevention and water flow resistance can be further reduced. Therefore, it is possible to prevent clogging and further reduce pressure loss by effectively using a water flow area larger than the water inlet 39 of the filter 32 so as to secure a total opening area larger than the opening area of the water inlet 39.

Here, while the filter 32 faces or is exposed in the water tank 3, it can be attached and detached from the outside of the water tank 3 so that maintenance in the event of an emergency can be easily performed. Specifically, as shown in FIGS. 3 and 4, the water suction portion 33 satisfies the positional relationship at the bottom portion of the water collection portion 3 e in which the bottom portion 3 b of the peripheral wall of the water tank 3 is recessed downward together with the drain port 36. The cover space 41 opens to the bottom of the water collecting portion 3e, and the bottom of the cover space 41 forms a recess in which the water inlet 39 opens. The water collection portion 3e is formed around the bottom 3b of the water tank 3 as shown in FIG. A filter attaching / detaching port 42 as shown in FIG. 3 is opened in a portion forming a downward step portion 3f facing the front portion of the washing machine main body 2 as shown in FIG. Accordingly, in the unlikely event that the filter 32 is removed, if the screw 32 of the removal cover 43 provided at the lower front portion of the washing machine body 2 is unscrewed and removed as shown in FIG. 8, the filter 32 shown in FIGS. 4, 6, and 8 are exposed under the front portion of the washing machine body 2, so that even if there is an obstruction such as the control unit 45 as shown in FIG. For example, it is easy to attach and detach if it is light, that is, it is unscrewed to prevent falling down, and tilted forward with the wiring, and maintenance such as cleaning or replacement for clogging or breakage can be performed.

  For this attachment / detachment, the filter 32 includes an insertion portion 32a that is inserted into the covering space 41 as shown in FIGS. 3, 5, and 6 through the attachment / detachment opening 42, and an attachment / detachment opening when the insertion of the insertion portion 32a into the covering space 41 is completed. And a flange portion 32b that closes or abuts against the front face of the opening of the opening 42 and seals the attachment / detachment port 42 with the seal member 47, and the filter 32 is formed in the insertion portion 32a by hole forming with a forming die, and the flange portion 32b. A knob portion 32c is formed on the front surface of the frame to facilitate attachment / detachment. Further, in order to prevent inadvertent loosening of the insertion and loosening of the seal, a mounting hole 49 for screwing the flange portion 32b on the water tank 3 side with a screw 48 shown in FIG. 3 is provided. Further, the insertion portion 32a includes a protruding portion 32a1 that allows the filter 32 to be discharged into the water tank 3 in a tightly fitted state to the opening 41a of the covering space 41 of the water tank 3 or to be in a predetermined exposed state when the insertion is completed. A positioning flange 32a2 that is lower than the protrusion 32a1 and has a wedge shape when viewed from the side toward the insertion side, that is, the back side of the washing machine body 2, is formed integrally with the flange 32b of the protrusion 32a1. The portion 32a2 is guided by a wedge-shaped guide groove 41b in a side view formed on the lower surface of the opening 41a of the cover space 41 of the aquarium 3, and the insertion portion 32a is easily and reliably inserted to a predetermined insertion completion position. And fixed to a predetermined protruding state or exposed state.

  The recessed area that forms the cover space for accommodating the filter 32 on the water tank 3 side through the attachment / detachment opening 42 is formed when the inner periphery and the outer periphery of the water tank 3 are molded by a mold member that is die-cut from the front side of the water tank 3. Simultaneous molding is possible, and the mold structure and molding operation are not particularly difficult, and the cost is not increased.

  Further, as shown in FIGS. 1, 7, and 9, the discharge side path 31b of the water circulation path 31 is connected to the jet port 51 shown in FIG. 7 provided at the lowermost part of the front end wall 3h around the opening 13 of the water tank 3 from the outer surface. A flow path formed by connecting and injecting circulating water from the discharge-side passage 31b between the rear surface of the front end wall 3h of the water tank 3 and the front surface of the front end wall 4b of the rotating drum 4 corresponding thereto. 52 is discharged into the rotary drum 4. As a result, the water outlet 51 from the discharge side passage 31b is in a position where it does not come into contact with the laundry in the rotating drum 4, so that the laundry is caught and washed too easily, disturbing the behavior necessary for drying, Alternatively, it can be prevented from being damaged or torn. In addition, since the flow path 52 is formed between the water tank 3 and the front end walls 3h and 4b of the rotating drum 4, no special parts are required, the structure is simple, and the risk of water leakage is reduced. The jetting effect of the circulating water is further enhanced by a combination of the behavior of the laundry in which the upper and lower sides are switched in the forward / reverse continuous rotation driving mode and the behavior of the laundry in which the left and right are switched in the forward / reverse arc rotation driving mode.

Moreover, the spout 51 is located on the back surface of the front end wall 3h of the water tank 3 as shown in FIG. 7C, specifically, in the direction of the rotation center of the rotary drum 4, specifically between the front end walls 3h and 4b of the water tank 3 and the rotary drum 4. The circulating water jetted from the injection port 51 passes through the flow channel 52 in the radial direction toward the rotation center side of the rotating drum 4, specifically toward the annular outlet 53. Thus, the water can be efficiently discharged into the inner rotation area of the rotating drum 4, and the circulating 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 main body 2 from a position corresponding to the spout 51 toward the inner periphery, and from the inclined surface 3h1 to the inner periphery of the rotating drum 4. By having the curved surface 3h2 curved toward the opening 54 side, as shown in FIG. 3 (c), the circulating water ejected into the flow path 52 extends from the inclined surface 3h1 to the curved surface 3h2. Since it is made to discharge toward the back | inner side of the rotating drum 4 through the opening 54 of the rotating drum 4, the supply efficiency to the laundry of circulating water can be improved.

  As shown in FIG. 7 (c), the spout 51 opens at a substantially central position at the bottom of the front end wall 3h of the water tank 3, and the spout 51 and the discharge-side path 31 are made of the resin shown in FIGS. The duct 55 is connected. The duct 55 is formed flat in the front-rear direction by combining the front and rear members 55a, 55b. The discharge side passage 31b is biased to one side in the left-right direction with respect to the opening position of the spout 51 and extends forward in parallel with the axis of the water tank 3 from the circulation pump 20, and the duct 55 is connected to the front end of the pipe-like discharge side passage 31b and the spout. 51 is connected to the discharge side passage 31b as an extension by a connection pipe 55c integrally formed at one end of the rear member 55a. After extending substantially horizontally from the one end side to near the lower part of the jet port 51, the other end side is jetted. As shown in FIG. 7 (c), the connection port 51 a that opens to the front end wall 3 h of the water tank 3 of the spout 51 is formed by a connection port 55 e that is integrally formed with the rear member 55 a of the rising portion 55 d as shown in FIG. It is connected via a seal member 56 and fixed with screws 57.

  In particular, the spout 51 is connected to the front end wall 4h of the rotating drum 4 in parallel to the connection port 51a that opens to the front end wall 3h of the water tank 3 and is formed integrally with the receiving wall 4c that is the rim of the connection port 51a. It is formed so as to open toward the annular outlet 53 with respect to the upper part, and the connection port 55d is a throttle that smoothly squeezes the jet passage toward the jet outlet 51 from the duct 55 side on the rounded surface between the receiving wall 4c. Since the wall 55f is provided, circulating water from the duct 55 toward the jet outlet 51 is energized, and a high-speed flow strongly along the inclined surface 3h1 and the curved surface 3h2 on the back surface of the front end wall 3h of the water tank 3 is provided. The laundry can be provided from a wide area by the laundry in the rotating drum 4 through a longer flight path that draws a parabola while being surely discharged obliquely upward and backward in a predetermined path and spreading left and right.

  Further, as shown in FIG. 7C, the front end wall 4b of the rotating drum 4 is formed with an annular rib-shaped convex portion 4c that crosses the flow path 52 in the circumferential direction leaving a narrowing gap S between the inclined surface 3h1. Has been. Further, the rib-like convex portion 4c changes in a wavy shape in the radial direction. For this reason, when the rotary drum 4 rotates, the rib-like convex portion 4c shows the crossing position with respect to the flow path 52 in the vicinity of the jet nozzle 51, that is, the formation position of the throttle gap S in three specific positions in FIG. Displace in the radial direction. As a result, the circulating water flow through the flow path 52 toward the annular outlet 53 is narrowed by the narrowing gap S near the annular outlet 53 and when it is narrowed by the narrowing gap S at a position far from the annular outlet 53. Therefore, the circulating water can be distributed and provided to the laundry in a wide area in the axial direction of the rotating drum 4.

  These parabola donating and back-and-forth distribution actions allow the circulating water to work evenly on the laundry, enhancing the detergent soaking effect, washing effect and rinsing effect.

  The traveling direction can be changed by contact friction with the surface of the front end wall 4b of the rotating drum 4 where the circulating water injected into the flow path 52 rotates instead of or in addition to the front and rear sorting action of the circulating water. Further, a baffle plate 61 for preventing the inhalation of the laundry is provided at a position directly above the drain outlet 36, as shown in FIGS.

  In the present embodiment, further, the clogging by the lint that has been filtered so as to remain in the water tank 3 of the filter 32 during the water circulation in the washing process is prevented so that the circulation function is not impaired. In order to secure the automatic cleaning function that eliminates the need for maintenance by separating the yarn wastes in the rotary drum 4 and the laundry and discharging the waste water by drainage, and the yarn wastes in the filter 32, the water tank 3, and the rotary drum 4. I am also doing it. For this purpose, the above-described forward / reverse continuous rotation drive mode, forward / reverse arc rotation drive mode, and water circulation operation by the circulation system 16 are skillfully used.

  Specifically, in the washing process, forward / reverse continuous rotation drive mode in which the rotating drum 4 is continuously rotated forward / reverse alternately at a predetermined number of rotations and for a predetermined time, and arc rotation at a predetermined angle of the rotating drum alternately forward / reversely. As shown in FIG. 10, the forward / reverse arc rotation drive mode is alternately performed as shown in FIG. 10, and the circulation pump 20 is stopped for a predetermined time during the forward / reverse inversion operation of the arc rotation of the rotary drum 4 in the forward / reverse arc rotation drive mode. To the state. In this way, the washing process is performed by driving the rotary drum 4 at a predetermined angle in a forward / reverse arc rotation manner to lift the laundry up to a predetermined angle and causing the laundry to move from the inner surface of the rotary drum due to its inertia and its own weight during sudden braking by forward / reverse switching. Since it is possible to peel off and drop to the opposite side of the lifting side by its own weight, the left and right sides are achieved alternately. , The washing effect can be enhanced and the forward and reverse continuous rotation drive mode repeats alternately lifting the laundry to the left and right alternately, realizing a change in the top and bottom of the laundry that is difficult to obtain in the forward and reverse arc rotation drive mode However, by reducing the imbalance of applying mechanical force to the laundry in the forward and reverse arc rotation drive mode, it is possible to deal with uniform and strong dirt according to the number of rotations and time for executing them. While giving an effective washing behavior, the water circulation operation by the water circulation path 31 of the water in the water tank 3 and the water circulation operation by the circulation pump 20 make the detergent dissolve, and the water in the water tank 3 contacts and permeates the laundry more actively. The washing function can be enhanced.

  In addition, since the circulating water is filtered by the filter 32 facing the water tank 3, it is possible to prevent lint from entering the water circulation path 31 and the circulation pump 20, and the water tank 3 is sucked into the water circulation path 31 through the filter 32. The water flow is constantly disturbed by the accompanying flow accompanying the rotation of the rotating drum 4, the forward / reverse reversal of the continuous rotation of the rotating drum 3, and the forward / reverse rotation of the arc rotation, so that the filter 32 is adsorbed and accumulated so as to become clogged. Can be suppressed. In particular, the effect of water disturbance due to frequent forward / reverse reversal of the rotating drum 4 during forward / reverse arc rotation and alternately lifting the laundry left and right is high in the aquarium 3 and the rotating drum 4 as well. The suspension pump 20 is stopped for a predetermined period of time and the suction of water through the filter 32 is stopped, so that the lint attached to the filter 32 and the laundry is submerged in the water tank 3 and the rotating drum 4. Since the contact efficiency of the laundry with the water in the forward / reverse arc rotation drive mode is high, the influence on the washing efficiency due to the circulation suspension can be suppressed.

  As a result of these, in the washing process, the laundry is lifted to the left and right one side by forward and reverse arc rotation drive and dropped to the other side at the time of rotation reversal and the left and right are alternately performed while the laundry is replaced left and right. Repeatedly switching the laundry up and down by repeatedly applying the mechanical force to achieve effective tapping and continuously lifting the laundry to the other side by continuous forward and reverse rotation. While reducing the imbalance of applying mechanical force to the laundry in the forward and reverse arc rotation drive mode, while giving an effective washing behavior against uniform and strong dirt according to the rotation speed and time for executing them, The washing function can be enhanced by promoting the circulation of the detergent in the water tank 3, the dissolution of the detergent, the contact of the water with the laundry, and the penetration. Further, since the circulating water is filtered by the filter 32 facing the water tank 3, the yarn waste does not enter the water circulation path 31 and the circulation pump 20, and their maintenance becomes unnecessary. Further, the suction flow through the circulating water filter 32 is constantly disturbed by the accompanying flow accompanying the rotation of the rotating drum 4, the forward / reverse reversal of the continuous rotation of the rotating drum 4, and the forward / reverse rotation of the arc rotation. It is avoided that the circulation function is impaired due to clogging. Moreover, during forward and reverse arc rotation, frequent forward and reverse reversal of the rotating drum 4 and lifting and dropping the laundry alternately left and right can reduce the washing effect by making active use of the laundry and water. In addition, while exhibiting a high water turbulence effect in both the water tank 3 and the rotating drum 4, the circulation pump 20 is stopped for a predetermined time during forward and reverse arc rotation, and lint is not newly attached to the filter 32. Combined with this, the lint attached to the filter 32 and the laundry can be surely suspended in the water in the water tank 3 and the rotating drum 4 and easily discharged at the time of drainage. Automatic cleaning is realized in which special maintenance related to the yarn waste in the drum 4 is not required. For this purpose, it is preferable to end the washing process and shift to drainage while executing the forward / reverse arc rotation drive mode while the circulation pump 20 is stopped.

  Separately, in the rinsing step, a predetermined amount of water is accumulated in the water tank 3 and the circulation pump 20 is stopped, and the centrifugal force acting on the laundry is larger than the gravity of the laundry, so that the laundry becomes the inner surface of the rotating drum 4. The rotating drum 4 is driven at the second rotational speed higher than that attached to the surface. Accordingly, in response to the fact that the washing performance is not questioned in the rinsing process, the circulation pump 20 is stopped so that the lint is not attached to the filter 32 due to water suction, and the lint is washed. The centrifugal force acting on the laundry is larger than the gravity of the laundry, and the rotational drum 4 is driven at the second rotational speed higher than the laundry sticks to the inner surface of the rotary drum 4 so as to increase the speed of the accompanying flow. In addition to the function of washing away lint attached to the filter, the laundry is actively separated from the lint clothing in the aquarium 3 and the rotating drum 4 to improve the floating property and improve the drainage efficiency by drainage. With the increase in the contact effect with water by lifting and dropping, the required amount of the predetermined amount stored in the water tank can be minimized, and the driving load of the rotating drum can be reduced without lowering the rinsing effect.

  Here, if the second rotational speed is about 100 to 200 rpm, the washing efficiency and the rinsing process are combined, and the discharge efficiency by wastewater of the yarn waste that increases in the second half can be significantly increased.

  In addition, when the duty ratio of the on / off of the circulation pump 20 is reduced as the operation time elapses, the washing process ensures that the on-ratio of the circulation pump 20 is sufficiently secured in the first half of the washing process. As the operation time elapses, the circulation pump 20 is turned on and off while the washing liquid quickly penetrates into the laundry such as clothes and wets the laundry to increase the rolling mechanical force. By controlling the duty ratio to be small, the floating rate of the yarn wastes in the water tank 3 and the rotating drum 4 in the water can be increased, and the drainage efficiency due to drainage accompanying the end of the washing process can be increased.

  On the other hand, in the washing process, by reducing the rotation speed of the circulation pump 20 as the operation time elapses, the rotation speed of the circulation pump 20 is sufficiently secured in the first half of the washing process, which is important for the cleaning operation. By rapidly infiltrating the laundry into the laundry such as clothes and increasing the rolling mechanical force by wetting the laundry, the rotational speed of the circulation pump 20 is decreased with the passage of the operation time. While the water is continuously circulated, the floating rate of the yarn wastes in the water tank 3 and the rotating drum 4 in the water can be increased, and the discharge efficiency by drainage accompanying the end of the rinsing process can be increased.

  Thread waste removed while removing waste with a filter to circulate water in the aquarium in a process such as washing and rinsing in a drum-type washer / dryer with a rotating drum installed horizontally or inclined Maintenance of the entire water tank and rotating drum can be made unnecessary.

It is a perspective view which shows the principal part structure of the drum type washing machine which concerns on embodiment of this invention. It is sectional drawing, the side view, and the bottom view of the circulation pump used for the drum type washing machine of FIG. FIG. 2 is a cross-sectional view of a water suction portion and a drain port portion having a filter of the drum type washing machine of FIG. 1. FIG. 4 is a plan view of a water suction part and a drain port part shown in FIG. 3. It is a perspective view which shows the filter of the water suction part shown in FIG. 4, FIG. It is a front view which shows the filter mounting part in the water tank of the drum type washing machine of FIG. FIG. 3 is a front view, a transverse cross-sectional view, and a vertical cross-sectional view showing a duct that connects a discharge side path of a water circulation path of the drum type washing machine of FIG. 1 to a water tank. It is a perspective view of the lower half part which shows the state which removed the front panel in the drum type washing machine of FIG. It is sectional drawing which shows schematic structure of the drum type washing machine of FIG. It is a time chart in the case of repeating a forward / reverse continuous rotation drive mode and a forward / reverse arc rotation drive mode alternately for a rotating drum.

Explanation of symbols

2 Washing machine body 3 Water tank 3f Step 4 Rotating drum 5 Open / close door 6 Motor 7 Water supply system 8 Drainage system 8a Drainage path 9 Drying system 11 Drainage system 16 Water circulation system 19 Drain valve 20 Circulation pump 22 Control system 31 Water circulation path 31a Water absorption side Path 31b Discharge side path 32 Filter 33 Water suction part 36 Drain outlet 51 Spout 52 Flow path 53 Annular outlet

Claims (5)

A rotating drum formed in a cylindrical shape with a bottom is installed in a water tank so that the rotation axis direction is horizontal or inclined downward from the horizontal direction from the opening front side toward the back side as the bottom. In a drum-type washing machine that is driven by a motor and can perform at least one of a washing process and a rinsing process,
A water circulation function for sucking the water in the water tank by a circulation path and a circulation pump and circulating it back into the water tank; and a filter that filters the water that is located in the water tank and is sucked into the circulation path. At least one of the step and the rinsing step drives the motor, and continuously rotates the rotating drum at a rotation speed indicating a behavior in which the laundry lifted by the rotation of the rotating drum falls from a height where its own weight wins. A continuous rotation drive mode in which continuous rotation of the rotating drum in a continuous rotation driving mode is repeated forward and reverse alternately, and a rapid arc rotation of the rotating drum by rapidly rotating the motor by rapidly driving the motor. The laundry is stuck to the inner surface of the rotating drum by the centrifugal force of and is held from the lowest position of the rotating drum to a position of more than 90 degrees and less than 180 degrees. After being pulled, the laundry is peeled off from the inner surface of the rotating drum due to its inertia and its own weight due to sudden braking of the rotation of the motor and dropped to the side opposite to the lifting side of the lower range of the rotating drum, The forward / reverse arc rotation drive mode, which is alternately repeated in the forward and reverse directions, is alternately performed, and the circulation pump is stopped for a predetermined time during the forward / reverse inversion operation of the arc rotation of the rotating drum in the forward / reverse arc rotation drive mode. A drum type washing machine.   In the rinsing step, a predetermined amount of water is accumulated in the water tank and the circulation pump is stopped, so that the centrifugal force acting on the laundry is larger than the gravity of the laundry and the laundry sticks to the inner surface of the rotating drum. The drum type washing machine according to claim 1, wherein the rotating drum is driven at the second rotational speed.   The drum-type washing machine according to claim 2, wherein the second rotational speed is about 100 to 200 rpm.   The drum type washing machine according to any one of claims 1 to 3, wherein in the washing process, the duty ratio of the on / off of the circulation pump is reduced with the passage of operation time.   The drum type washing machine according to any one of claims 1 to 4, wherein in the washing step, the number of rotations of the circulation pump is reduced with the passage of operation time.

Images