JP2007282963A - Drum type washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently capture the lint and to easily attach/detach a lint filter. <P>SOLUTION: The shape of a drain hole 16 for draining washing water in the dewatering process is changed from round to oval so that the lint can be easily discharged to the outside of a drum 5 in the washing, rinsing and dewatering processes to improve the efficiency in capturing the lint. By making the shape of the drain hole 16 oval in the direction of water flow generated when the drum 5 is rotated, the slender lint can be easily discharged to the outside of the drum 5 from the drain hole 16 in the respective processes. At the same time, for improving the lint capturing work, washing water at the bottom of the drum 5 is pumped up by a circulation pump 8, and the lint is captured by the lint filter 10 provided at the upper face of a body of the washing machine. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a drum-type washing machine in which lint that peels off from laundry is well collected.

  The lint collection of the drum type washing machine is collected by a lint filter from the bottom of the drum type washing machine as shown in Patent Document 1, and the washing water is discharged from the drain hose by turning on the drain valve.

  In this method, since there is little washing water and the dewatering hole is circular, the lint coming out of the laundry is not easily released into the washing water, and even if it is released, the slender lint is difficult to be discharged outside through the dewatering hole. In Patent Document 2, a lint filter is attached to the inner surface of the drum. However, since the inner surface of the drum is used, it can be applied only to a top-open drum, and its use is limited.

JP 2005-587779 A JP 2004-208712 A

  Since the drum-type washing machine performs washing using a small amount of washing water, lint that adheres to the laundry is not easily released from the laundry. For this reason, it is necessary to improve the collection of lint through the steps of washing, rinsing and dehydration. Further, since the collection of lint is improved, the maintenance of the lint filter, that is, the removal and cleaning of the lint filter become frequent, so these also need to be improved.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a drum type washing machine in which lint is well collected and the lint filter can be easily attached and detached.

  The present invention improves the collection of lint in order to make it easier to discharge lint to the outside of the washing drum in each step of washing, rinsing and dewatering. It was made into a long hole shape.

  That is, by forming the elongated hole in the direction of the water flow generated when the washing drum rotates, the elongated lint can be easily discharged from the dewatering hole to the outside of the washing drum in each step. In order to improve lint collection work, the washing water at the bottom of the washing drum was pumped up by a circulation pump, and lint was collected by a lint filter provided on the upper side in the outer frame.

  In addition, the lint filter is installed on the pressure side so that it can collect lint in large quantities with less clogging and increases the water level at the beginning of the rinsing process multiple times, so that lint can be easily released from the laundry. It is easy to discharge to the outside of the washing drum.

  According to the present invention, since the dewatering hole has a long hole shape in the rotation direction of the washing drum, it becomes the same as the water flow direction of the washing water, so that the elongated lint can be easily discharged from the dewatering hole and the collection of lint is improved. . In addition, since the lint filter is located above the drum-type washing machine outer frame, maintenance work can be performed without bending.

  Embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a longitudinal sectional view of a drum type washing machine according to an embodiment of the present invention. A door 2 that can be opened and closed by a hinge mechanism (not shown) is provided in front of the outer frame 1.

  The door 2 seals the washing water in the washing drum 5 by a rubber bellows 4 fixed to the outer frame 1 and the outer tub 3. A drain valve 6 for discharging washing water is provided at the bottom of the outer tub 3, and a drain hose 7 is connected to the end of the drain valve 6.

  A circulation pump 8 for circulating the wash water is connected to the bottom, and is connected to a lint filter 10 provided on the upper side of the outer frame 1 via a circulation pipe 9 in the circulation flow path. The lint filter 10 is housed in a filter case 50.

  The amount of lint accumulated in the lint filter 10 increases with each wash. To improve lint collection capacity, maintenance is repeated in a short period of time. For this reason, the number of times of maintenance increases.

  When the lint filter 10 is at the bottom, it is difficult to see and it is necessary to bend the waist every time it is operated. However, since the lint filter 10 is provided on the upper side, the lint filter 10 can be removed and cleaned each time without bending the waist. it can.

  The washing water passes through the lint filter 10 and is then poured into the washing drum from the water spout 11. Water is poured into the washing drum 5 from the water spout 11 without passing through the lint filter 10 by turning on the water supply electromagnetic valve 13 from a water supply hose (not shown) connected to the water supply port 12.

  The water spout 11 is provided at the lower end of the return pipe 51 of the return path for returning the washing water to the washing drum 5. The upper end of the return pipe 51 is connected so as to communicate with the filter case 50, and the water spout 11 at the lower end is connected so as to communicate with the upper part of the outer tub 5 on the inlet side.

  A suspension 15 for suppressing unbalance vibration due to the laundry 14 of the laundry drum 5 is attached to the bottom of the outer tub 3 as a pair on the left and right. Note that illustration of the upper surface portion of the outer tub 3 and the spring of the outer frame 1 is omitted.

  In this drum type washing machine, the rotational axis of the washing drum 5 is disposed obliquely. A plurality of dewatering holes 16 are formed in the washing drum 5 for discharging washing water during dehydration.

  In the drum-type washing machine in which the washing drum 5 is disposed obliquely, the washing water level is high on the bottom side of the washing drum 5. By increasing the hole number density of the dewatering holes 16 on the bottom side of the washing drum 5 where the washing water level becomes high, lint is easily released from the laundry 14.

  The lint released from the laundry 14 is easily discharged from the dewatering hole 16 because the water flow direction, the length direction of the lint and the longitudinal direction of the dewatering hole 16 become the same as the washing drum 5 rotates.

  Since lint easily flows out of the washing drum 5, it is well collected by the lint filter 10. Lint that adheres to the laundry is reduced and the finish of the laundry is improved.

  Further, since the washing drum 5 rotates, centrifugal force acts, and the stress becomes a tensile stress in the circumferential direction. Since the dewatering hole 16 is a long hole extending in the rotation direction (circumferential direction), the stress is greatly reduced as compared to the perpendicular direction.

  A lifter 17 for scooping up the laundry 14 is provided in the laundry drum 5. A motor 18 for rotating the washing drum 5 is fixed to the outer tub 3, and a rotary shaft 19 is sealed (not shown) and directly connected to the drum 5.

  FIG. 2 relates to an embodiment of the present invention and shows an operation process of a drum type washing machine.

  In this operation process, dirt attached to the laundry 14 is removed, and the detergent is rinsed and the lint is removed by rinsing. Further, an automatic washing operation process in which the washing water contained in the laundry 14 is automatically dehydrated and drained from the dewatering hole 16 by the rotation of the washing drum 5 by the centrifugal force is shown.

  First, the water supply electromagnetic valve 13 is turned on to supply water 21. Water is supplied up to about 20 liters. The amount of water supply is usually about 25 liters.

  The detergent set in the detergent case flows together into the washing drum 5 when water is supplied, and the detergent is dissolved by the rotation of the washing drum 5. When washing water necessary for washing is supplied to the washing 22, the motor 18 rotates to rotate the washing drum 5.

  The rotational speed of the washing drum 5 at this time is 40 to 60 revolutions per minute. The larger the outer shape of the washing drum 5 is, the lower the number of revolutions becomes. While being scraped up, it is washed by tapping.

  At this time, the circulation pump 8 is intermittently or continuously operated. Since the amount of circulating water disappears when stopping intermittently, the washing water in the circulation pipe 9 returns and the water level slightly increases, so that lint is released from the laundry 14. The liberated lint is discharged to the outside of the washing drum 5 through the dewatering hole 16 by the water flow generated by the rotation of the drum 5.

  At this time, the apparent washing water is increased in the laundry 14 due to the foam of the detergent, so that the lint is more easily released than the washing water alone, so that the collection of the lint is improved. Further, when the shape of the dewatering hole 16 is a round hole, the surface tension of the foam is large, so that it is not discharged out of the washing drum 5. However, the oblong hole of the embodiment according to the present invention is smaller than that, so lint collection is improved. The

  When the washing 22 is finished, the washing water containing the dirt flowing out from the laundry 14 is transferred to the drainage 23 that turns on the drainage valve 6 and drains it out of the machine by the drainage hose 7.

  After the drainage 23 is completed, the process proceeds to dehydration 24 for dehydrating the detergent contained in the laundry 14. In the dehydration 24, the washing drum 5 is rotated at a high speed, and the washing water contained in the laundry 14 is dehydrated through the dewatering hole 16 opened in the washing drum 5 by centrifugal force.

  When the dehydration 24 is completed, the detergent contained in the laundry 14 is rinsed and the process proceeds to the rinse (1) 26. At this time, water supply 25 is performed, but the water supply level is set higher than that of the wash 22 and rinsing (1) 26 is performed. The amount of water supply is increased by about 20 to 40% with respect to the time of washing.

  As a result, the lint adhered to the surface of the laundry 14 is easily released from the time of washing, and is discharged out of the drum 5 through the dewatering hole 16, and the lint is collected by the lint filter 10 through the circulation pump 8.

  At this time, if the washing water level is raised as much as possible, it becomes easier to release lint adhering to the laundry 14, so that the circulation pump 8 is intermittently operated or stopped. When rinsing (1) 26 is completed, drainage 27 and dehydration 28 are performed, water supply 29 is performed, and rinsing (2) 30 is performed.

  The amount of water supply at this time is equal to that at the time of washing or increased by the time of rinsing (1). When rinsing (2) 30 is completed, drainage 31 and final dehydration 32 are performed, and the washing operation process ends.

  In addition, since it is necessary to increase the amount of washing water to ensure lint collection, a dedicated process may be provided to distinguish it from the standard process.

  FIG. 3 is a circuit block diagram of a drum type washing machine according to an embodiment of the present invention.

  The power source 35 is a commercial power source of AC 100 V, 50/60 Hz, and is connected to the power switch 37 via the outlet 36.

  When the power switch 37 is turned on, the energized power source is double-voltage rectified by a rectifier circuit 39 which is a driving power source of the motor 18 through a filter circuit 38 which cuts line noise of the power source and noise generated in each circuit.

  The rectifier circuit 39 is connected to an inverter circuit 40, a voltage detection circuit 41, a current detection circuit 42, and the motor 18. A position detection device 43 is connected to the motor 18 to control the rotational speed of the motor 18. A drive circuit 45 for driving each electrical component is connected to the microcomputer 44 to control the water supply electromagnetic valve 12, the drain valve 6, and the circulation pump 8.

  FIG. 4 relates to a conventional example, and shows a partial cross-sectional view of the dewatering hole 16 opened in the washing drum 5.

  The drum is made of a stainless steel plate having a thickness of about 0.2 to 0.4 mm, and a round hole having a diameter of about 3 to 5 mm is formed as the dewatering hole 16.

  The hole is not drilled directly, but the perimeter is recessed 1-2 mm. Since lint is an elongated fiber, the lint is not easily discharged out of the drum 5 through a hole of 3 mm, and remains in the drum 5.

  FIG. 5 relates to an embodiment of the present invention, and shows a partial cross-sectional view of the dewatering hole 16 formed in the drum 5.

  The width of the dewatering hole 16 is about 3 mm, which is almost the same as the diameter of the conventional dewatering hole 16. However, if the foreign object moves to the outside of the drum 5, it cannot be handled by the user, so the width should be narrow. Therefore, it should be as small as 1 to 3 mm.

  Since the length direction is smaller than the diameter of the smallest one-yen coin among the most common coins as a foreign object during washing, the length may be 20 mm or more if it is smaller than 20 mm and the width is 1 mm. The hole is not formed directly like the conventional example, but the periphery is recessed by 1 to 2 mm.

  This is done to increase the die life and dewatering efficiency. If there is no step, the laundry will block the dehydration hole directly, making it difficult for the wash water to come out. In addition, since the cross-sectional area of the base of the punching die can be increased, the die strength can be increased, and the die life is increased.

  Further, since the longitudinal direction is the circumferential direction, the washing water moves in the direction in which the drum 5 rotates, and the lint extends in the washing water moving direction. For this reason, in a round hole, since lint is longer than the diameter of a round hole, lint is not easily discharged | emitted from a hole.

  On the other hand, since the dewatering hole 16 of the present invention is a long hole in the rotation direction of the drum 5, the lint extending in the water flow direction can be easily discharged to the outside of the drum 5. In addition, since the holes are elongated in the circumferential direction, the stress applied to the holes is significantly reduced because the holes are applied in the circumferential direction compared to the holes that are elongated in the direction perpendicular to the circumferential direction.

  In addition, although the said Example is a drum type washing machine, this invention is applicable also to a drum type washing dryer.

The longitudinal cross-sectional view of the drum-type washing machine according to the embodiment of the present invention is shown. The operation | movement process of a drum-type washing machine is based on the Example of this invention. FIG. 2 is a circuit block diagram of a drum type washing machine according to an embodiment of the present invention. A partial cross-sectional view of a dewatering hole 16 formed in the drum 5 according to a conventional example is shown. The partial cross-sectional view of the dewatering hole 16 formed in the drum 5 according to the embodiment of the present invention is shown.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Outer frame, 3 ... Outer tank, 5 ... Drum, 8 ... Circulation pump, 9 ... Circulation piping, 10 ... Lint filter, 11 ... Sprinkling port, 16 ... Dehydration hole, 22 ... Washing, 26 ... Rinse (1) 51 ... Pipe for return flow.

Claims (5)

An outer tub provided in the outer frame, a cylindrical laundry drum that is rotatably provided in the outer tub, and in which the direction of the rotation axis is horizontal or inclined, and collects lint contained in the washing water In a drum type washing machine comprising a lint filter and a circulation pump for circulating the washing water to the lint filter and the washing drum,
The drum type washing machine, wherein the plurality of dewatering holes provided around the washing drum are elongated in a rotating direction. In the drum type washing machine according to claim 1,
A circulation channel for guiding the wash water discharged from the circulation pump to the lint filter provided on the upper side in the outer frame;
A drum type washing machine comprising: a return channel for returning the washing water filtered by the lint filter to the washing drum. In the drum type washing machine according to claim 1,
A washing process for washing the laundry, and a rinsing process for rinsing the laundry after the washing process;
A drum type washing machine characterized in that the amount of washing water in the rinsing step is larger than the amount of water in the washing step. In the drum type washing machine according to claim 3,
The rinsing process includes a plurality of processes, and the washing water quantity is increased in the first process. An outer tub provided in the outer frame, a cylindrical laundry drum that is rotatably provided in the outer tub and in which the direction of the rotation axis is inclined, and a lint filter that collects lint contained in the washing water And a drum-type washing machine comprising a circulation pump for circulating the washing water through the lint filter and the washing drum,
A drum-type washing machine characterized in that a plurality of dewatering holes provided around the washing drum are elongated in the rotation direction, and the density of the dewatering holes is greater in the vicinity of the bottom of the washing drum than in other parts.

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