JP2010207310A - Drum type washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a washing machine excellent in the washing capability by effectively dissolving a detergent and maximizing the function as the detergent. <P>SOLUTION: The washing machine includes a rotary drum 17 rotatably disposed within a water tub 19 with the center of rotation horizontal or inclined relative to the horizontal direction; a drain 31 disposed on the bottom of the water tub 19; a motor 21 for rotationally driving the rotary drum 17; a water feeding means 43a for feeding washing water into the water tub 19; a draining means for draining washing water inside the water tub 19; and a control means 39 for executing washing, rinsing, dewatering steps, etc. by controlling the motor 21, the water feeding means 34a and the draining means, etc. The washing machine also has a circulation pathway 47 extended from an opening 45 disposed on the back surface of the water tub 19 to communicate with a drain faucet 37 disposed on the downstream of the drain 31. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a drum-type washing machine for washing clothes in a rotating drum.

  Conventionally, this type of drum type washing machine is configured as shown in FIG. The configuration will be described below.

  As shown in FIG. 6, the drum 1 is provided with a large number of water passage holes 2 on the entire outer periphery thereof, and is rotatably disposed in the water tank 3. One end of the rotating shaft 4 is fixed to the rotation center of the drum 1, and a drum pulley 5 is fixed to the other end of the rotating shaft 4. The motor 6 is connected to the drum pulley 5 by a belt 7 and rotationally drives the drum 1. A lid 8 is provided at the opening of the drum 1 so as to be freely opened and closed. The water tank 3 is suspended from the washing machine main body 9 by a spring body 10, and is supported by an anti-vibration damper 11 so that vibration during dehydration is not transmitted to the washing machine main body 9, and a weight 12 that reduces vibration during dehydration. Is provided. A drain port 117 is provided in the lower part of the water tank 3. The water supply valve 13 supplies the washing water into the water tank 3, and the drainage pump 14 discharges the washing water in the water tank 3. The heater 15 heats the washing water in the water tank 3. The control device 16 controls operations of the motor 6, the water supply valve 13, the drainage pump 14, the heater 15, and the like, and sequentially controls a series of steps such as washing, rinsing, and dehydration (see, for example, Patent Document 1).

  The operation of the drum type washing machine configured as described above will be described below.

When the lid 8 is opened and the laundry is put into the drum 1 and the operation is started, in the washing process, the water supply valve 13 is driven to supply the washing water into the water tank 3. When the water level of the washing water reaches a predetermined water level, the driving of the water supply valve 13 is stopped and the water supply is terminated. Thereafter, the drum 1 is driven to rotate at a low speed by the motor 6, and the laundry in the drum 1 is lifted and dropped onto the water surface. Thus, the washing process proceeds. After performing the washing process for a predetermined time, the washing water in the water tank 3 is stored in the drainage pump 14 via the drainage port 117, drained by driving the drainage pump 14, performing intermediate dehydration, and the subsequent rinsing process Do. In the rinsing process, the same operation as in the washing process is performed. In the dewatering process, the drum 1 is rotationally driven at a high speed, and the laundry is dewatered by centrifugation.
Japanese Patent Laid-Open No. 10-201988

  Originally, in the washing process, immediately after the start of washing, the detergent tank (not shown) is put into the water tank 3 by using water supplied from the water supply valve 13 or manually or by other means. When the washing water comes into contact with the soiled portion of the laundry, the detergent adheres to the soil and enhances the cleaning effect.

  However, in the conventional structure as described above, before the detergent introduced at the start of washing is completely mixed with water in the water tank 3, it directly falls into the drain port 17 as a lump of detergent and enters the drain cock. It has a problem that it is discharged without fulfilling its function as a detergent.

  The present invention solves the above-described conventional problem. Even if the detergent enters from the drain outlet 117 and accumulates in the drain cock, the detergent is caused to flow back into the water tank 3 again, and the drum 1 is rotated. An object of the present invention is to provide a drum-type washing machine in which washing water can be dissolved in water to enhance the washing effect.

  A rotating drum that is rotatably arranged in the aquarium and whose rotation center axis is horizontal or inclined from the horizontal, a drain opening provided at the bottom of the aquarium, a motor that rotationally drives the rotating drum, and a water tank Water supply means for supplying wash water, drain means for draining wash water in the aquarium, and control means for controlling the motor, water supply means, drain means and the like to execute each step of washing, rinsing, dehydrating, etc. And a circulation path extending from an opening disposed on the back surface of the water tank and communicating with a drain cock provided downstream of the drain port.

  Thus, in the cleaning process, when the detergent enters from the drainage port and accumulates in the drainage cock, the cleaning water enters the drainage cock from the opening on the back of the rotating drum through the circulation path, and the cleaning water enters The detergent is rolled up. The detergent flows back into the aquarium again by being rolled up by the washing water from the drain cock, and is dissolved in the aquarium and the washing water in the drum by the rotation of the drum. A drum type washing machine capable of enhancing the effect is provided.

  In the drum type washing machine of the present invention, even if the detergent enters from the drain outlet and accumulates in the drain cock during the washing process, the detergent is caused to flow back into the water tank again, and the The washing water can be dissolved in the water so that the function as a detergent can be exerted and the washing effect can be enhanced.

  1st invention is arrange | positioned rotatably in a water tank, The rotating drum in which the rotation center axis | shaft inclined from horizontal or horizontal, The drain outlet provided in the bottom part of the water tank, The motor which rotationally drives a rotating drum, Control for executing each process such as washing, rinsing and dewatering by controlling the water supply means for supplying the washing water into the aquarium, the drain means for draining the washing water in the aquarium, the motor, the water supply means and the drainage means, etc. And a drum-type washing machine provided with a circulation path that extends from an opening disposed on the back surface of the water tank and communicates with a drain cock provided downstream of the drain port, during the cleaning process, When the detergent enters from the drain outlet and accumulates in the drain cock, the detergent can be made to flow back into the water tank again and dissolved in the washing water, so that the function as a detergent can be exhibited and the washing effect can be enhanced.

  In the second invention, in particular, the opening formed in the back surface of the water tank of the first invention is provided at a position above the rated water level in the washing process, so that the water level in the water tank rises when the drum rotates, and the water level exceeds the rated water level. A circulation path of water from the back surface to the drain cock opening to the drain cock can be generated. As a result, the washing water having momentum collides with the detergent accumulated in the drain cock, and the detergent lump can be broken and the melting speed of the detergent can be increased by the turbulent flow generated in the drain cock.

  The third aspect of the invention relates to a drum type washing machine in which the rear surface of the aquarium of the first or second aspect of the invention is formed in an uneven shape alternately, and an opening extending downstream of the drain outlet is disposed in the concave portion of the rear surface of the aquarium. By doing so, the water in the water tank is effectively collected in the opening on the back surface in the water tank when the drum rotates. Thereby, the washing water having a momentum collides with the detergent accumulated in the drain cock, and the detergent lump is damaged and the melting speed of the detergent can be increased by the turbulent flow generated in the drain cock.

  According to the fourth aspect of the invention, in particular, the opening connected to the drain cock side of the path of the first to third inventions is a drum-type washing machine provided on the lower surface of the drain cock, thereby preparing the configuration of the drain cock opening. As a result, the die cost can be reduced, and a washing machine excellent in cleaning performance can be provided at low cost.

  In the fifth aspect of the invention, in particular, the opening communicating with the drain cock of the circulation path of the first to third inventions is a drum-type washing machine provided on the side of the drain cock so that the detergent entering the drain cock can be used. On the other hand, the wash water that has momentum in different directions collides with the detergent accumulated in the drain cock, damaging the detergent mass and increasing the melting speed of the detergent by the turbulent flow generated in the drain cock. it can.

  In the sixth aspect of the invention, in particular, the circulation path of the first to fifth aspects of the invention is a drum-type washing machine having an elbow shape at both ends, so that the circulation path from the back of the aquarium to the cock can be configured compactly. Since it can be configured with a limited space on the back side of the drum type washing machine, the washing machine body can be configured compactly.

  In the seventh aspect of the invention, in particular, the circulation path of the sixth aspect of the invention is a drum-type washing machine formed of a chemical-resistant and heat-resistant resin, thereby suppressing deterioration against high temperatures and detergents during washing and having a long service life. A drum-type washing machine can be configured.

  In the eighth aspect of the invention, in particular, since the circulation path of the sixth aspect of the invention is a drum type washing machine formed by blow molding, the shape of the circulation path can be configured at low cost. Can be provided at low cost.

  In the ninth aspect of the invention, in particular, the circulation path of the sixth aspect of the invention constitutes a drum-type washing machine with excellent heat and chemical resistance by using a drum-type washing machine formed of EDPM. I can do it.

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

(Embodiment 1)
1 is a side sectional view of a drum-type washing machine according to a first embodiment of the present invention, FIG. 2 is a side sectional view of the water tank, FIG. 3 is a rear view of the water tank, and FIG. 4 is a longitudinal section of the water tank. FIG.

  In FIG. 1, the rotating drum 17 is formed in a bottomed cylindrical shape, and a large number of water passage holes 18 are provided on the entire surface of the outer peripheral portion, and are rotatably disposed in a water tank 19. A rotation axis (rotation center axis) 20 is provided in the inclination direction at the rotation center of the rotary drum 17, and the axial center direction of the rotation drum 17 is inclined downward from the front side toward the back side. A motor 21 attached to the rear surface of the water tank 19 is connected to the rotating shaft 20, and the rotating drum 17 is driven to rotate in the forward and reverse directions by the motor 21. Several protruding plates 22 are provided on the inner wall surface of the rotating drum 17.

  An opening 24 provided on the upward inclined surface of the main body 23 on the front side of the aquarium 19 is covered with a lid 25 so as to be freely opened and closed. By opening the lid 25, the opening 24, the aquarium clothing entrance 26 and the rotary drum clothing entrance 27, the laundry is put into the rotary drum 17 so that the laundry can be taken out from the rotary drum 17. Since the lid body 25 is provided on the upwardly inclined surface, the user can reduce the degree of bending his / her waist when putting in and out the laundry.

The water tank 19 is suspended from the main body 23 by a spring body 28 and a damper 29 so as to be swingable. A concave drainage groove 30 that is long in the direction of the rotary shaft 20 is provided on the inner bottom of the water tank 19. A heater 50 is disposed in the drainage groove 30. A drain outlet 31 is provided near the rear side of the bottom of the drain groove 30, a drain cock 37 is connected to the drain outlet 31, a drain path 32 is connected to the outlet side of the drain cock 37, and the drain path 32 The other end is connected to a drain valve (drainage means) 33 so that the washing water in the water tank 19 is drained. The water supply valve (water supply means) 34 a is provided for supplying washing water into the water tank 19 through the detergent case 35 and the water supply path 36, and the water level detection means 48 is provided for detecting the water level in the water tank 19. Yes.

  The control device 39 has a control means constituted by a microcomputer, and controls the operations of the motor 21, drain valve (DV) 33, water supply valves (FV) 34a, b, etc. via the power switching means, washing and rinsing. A series of steps of dehydration and drying are sequentially controlled.

  The control means inputs information from the input setting means for setting the driving course and the like and displays it on the display means based on the information to notify the user. The storage means stores data necessary for control by the control means 39.

  In FIG. 2, a rear opening 45 is provided on the rear surface of the water tank 19, and the rear opening 45 of the water tank and the opening 46 provided in the drain cock 37 are connected by a circulation path 47 so that water can be circulated. ing. The circulation path 47 is formed by blow molding with EPDM having excellent heat resistance and chemical resistance against warm water and detergent during washing. Thus, a circulation path can be formed in a limited space on the rear surface of the water tank. Further, the opening 46 of the drain cock 37 is provided below the cock as shown in FIG.

The operation of the above configuration will be described.
When the door 25 is opened and the laundry is put into the rotating drum 17 and a predetermined amount of detergent is put into the detergent case 35 and then the operation is started, the washing process is executed first. In the washing process, the water supply valve 34a is operated to supply the washing water, and the washing water passes through the detergent charging case 35 and the water supply path 36 and enters the water tank 19 together with the detergent. At the same time, the rotating drum 17 starts rotating at a first predetermined rotation speed (for example, 120 r / min). The rotating direction of the rotating drum 17 at this time is a counterclockwise direction when viewed from the front.

  By this operation, the washing water containing the detergent is agitated, and the detergent gradually dissolves in the washing water. At the same time, the washing water is added to the side wall 30 of the drainage groove 30 (not shown. Clash in the direction side). The collision generates washing foam having a high concentration of detergent components, and the washing foam gradually fills between the rotating drum 17 and the water tank 19. After that, when it becomes full, the washing foam wraps around in front of the rotary drum 17 and the water tub 19, enters the rotary drum 17 through the rotary drum clothing entrance 27, and soaks into the laundry therein.

  At this time, most of the detergent reaching the drain groove 30 is dissolved by stirring, but when the amount of detergent is large, the detergent remaining undissolved falls into the drain cock 37 from the drain outlet 31 without being dissolved in the washing water, and is accumulated. There are things to do.

  Thereafter, the washing foam takes in the dirt adhering to the laundry by centrifugal force generated by the rotation of the rotating drum 17, thereby removing the dirt from the laundry. Pass through and go out between the rotating drum 17 and the water tank 19. By repeating this operation, the laundry is washed. After this operation is performed for a predetermined time until the water level in the water tank 19 reaches a predetermined water level, the rotation speed of the rotary drum 17 is changed to a second predetermined rotation speed (for example, 45 r / min), forward rotation, pause, A washing operation in which the inversion and pause operations are repeated for a predetermined time (for example, 20 s ON-7 s OFF) is performed for a predetermined time.

  Note that the laundry accommodated in the rotating drum 17 is lifted in the rotating direction by the projection plate 22 provided on the inner peripheral wall of the rotating drum 17 by the rotation of the rotating drum 17 at the second predetermined rotation speed at this time. Since the agitating operation of dropping from the lifted appropriate height position is repeated, the laundry is subjected to tapping and washing, and washing is performed.

  When the rotary drum 17 is stationary, the water level in the circulation path 47 and the water level in the water tank 19 are the same, but when the rotary drum 17 starts rotating, the water in the water tank 19 is caused by the centrifugal force generated by the rotation of the rotary drum 17. Since the water level is temporarily lowered, the water level in the circulation path 47 also moves downward. As shown in FIG. 4, the rear opening is provided in a concave portion of the water tank so that water can be collected effectively. The collected water flows into the drain cock opening 46 side from the back opening 45 side of the water tank. Since the force of water acts on the opening provided below the drain cock, the detergent accumulated in the drain cock 37 is scooped up to the drain port 31 by the force. By this operation, dissolution of the detergent accumulated on the drain cock 37 is accelerated.

  When the washing operation is performed at a predetermined water temperature by heating the heater 15, hot water is supplied from the rear opening 45 side of the water tank to the drain cock 37 through the circulation path 47, and the temperature of the water originally stored increases. Therefore, the detergent can be dissolved more effectively. As a result, since the performance of the detergent can be effectively extracted, a drum type washing machine having excellent cleaning performance can be supplied.

(Embodiment 2)
The configuration of the drum type washing machine and the configuration of the control device in the second embodiment are basically the same as those described in the first embodiment. As shown in FIG. 5, the difference in the present embodiment is that the opening 46 provided in the drain cock is provided on the side of the cock, and the water that has flowed into the circulation path 47 due to the rotation of the rotary drum 17 It is to hit the detergent deposited on the side from the side.

  Thereby, when the rotating drum 17 rotates, water flowing from the drain port 31 and water flowing from the opening 46 are generated, and a turbulent flow is generated inside the drain cock 37 so that the detergent can be effectively dissolved. I can do it. In particular, a turbulent flow is generated when the detergent flows in from the opening 46 but once mixed with water on the opposite side by colliding the detergent once retained in the drain cock 37 from the side. As a result, the detergent is rolled up from the drain cock 37 into the water tank 19, and the performance of the detergent can be further effectively extracted, so that a drum type washing machine having excellent cleaning performance can be supplied. I can do it.

  As described above, the drum-type washing machine according to the present invention can effectively dissolve the detergent accumulated in the drain cock at the time of washing using the movement of water inside the circulation path, and thus has excellent cleaning performance. A drum-type washing machine can be provided.

Side sectional view of the drum-type washing machine according to Embodiment 1 of the present invention. Water tank side cross-sectional view of the drum type washing machine Rear view of the water tank of the drum type washing machine Water tank longitudinal section of the drum type washing machine Side sectional view of a water tank of a drum type washing machine according to Embodiment 2 of the present invention Side view of a conventional drum-type washing machine

17 Rotating drum 19 Water tank 20 Rotating shaft (Rotating center shaft)
21 Motor 31 Drain port 33 Drain valve (drainage means)
34 Water supply valve (water supply means)
37 Drain cock 38 Control means 45 Rear opening of water tank 46 Drain cock opening 47 Circulation path

Claims (9)

A rotating drum that is rotatably arranged in the aquarium and whose rotation center axis is horizontal or inclined from the horizontal, a drain opening provided at the bottom of the aquarium, a motor that rotationally drives the rotating drum, and a water tank Water supply means for supplying wash water, drain means for draining wash water in the aquarium, and control means for controlling the motor, water supply means, drain means and the like to execute each step of washing, rinsing, dehydrating, etc. A drum-type washing machine provided with a circulation path extending from an opening provided on the back surface of the water tank and communicating with a drain cock provided downstream of the drain port. The drum-type washing machine according to claim 1, wherein the opening formed in the rear surface of the water tub is provided at a position above a rated water level in a washing process. 3. The drum type washing machine according to claim 1, wherein the back surface of the water tank is alternately formed with a concave and convex shape, and an opening extending downstream of the drain port is disposed in the concave portion of the back surface of the water tank. The drum type washing machine according to any one of claims 1 to 3, wherein an opening communicating with the drain cock side of the circulation path is provided on a bottom surface of the drain cock. The drum-type washing machine according to any one of claims 1 to 3, wherein the opening communicating with the drain cock side of the circulation path is provided on a side surface of the drain cock. The drum-type washing machine according to any one of claims 1 to 5, wherein the circulation path has an elbow shape at both ends. The drum type washing machine according to claim 6, wherein the circulation path is formed of a chemical resistant and heat resistant resin. The drum-type washing machine according to claim 6, wherein the circulation path is formed by blow molding. The drum-type washing machine according to claim 6, wherein the circulation path is formed by EDPM.