JP2017189480A - Drum type washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drum type washing machine which suppresses washing unevenness and which has improved washing performance.SOLUTION: A washing machine includes: a cylindrical outer tub provided in an outer frame housing and for storing washing water; a washing drum tub provided in the outer tub in a rotatable manner; a lifter provided on an inner periphery of the washing drum tub, and for scraping up and dropping laundry in the washing drum tub; and an electric motor for rotationally driving the washing drum tub. The lifter includes: a front surface part formed along substantially the vertical direction with respect to a rotary shaft center of the washing drum tub on the front side; and a back surface part formed along substantially the vertical direction with respect to the rotary shaft center of the washing drum tub on the rear side. The length in the circumferential direction of the rotation of the washing drum tub on the front surface part is longer than the length in the circumferential direction of the rotation of the washing drum tub on the back surface part.SELECTED DRAWING: Figure 2(b)

Description

  The present invention relates to a drum type washing machine.

  In drum-type washing machines whose main washing method is the use of energy washing when clothes fall, it is common to place multiple lifters (baffles) for lifting clothes parallel to the drum rotation axis center line. Is.

  Patent Document 1 states that “a rotating drum 2 that is formed in a cylindrical shape and whose rotation axis is inclined upward from the back side to the front side, a water tank 3 that contains the rotating drum 2, and an inner peripheral surface of the rotating drum 2. And the top part 4c of the baffle 4 is formed so that the height thereof decreases from the inner surface of the rotating drum 2 toward the front side from the back side of the rotating drum 2, The side surfaces 4a and 4b of the baffle 4 are formed in a planar shape having a predetermined angle with respect to the radial direction of the rotating drum 2, so that when the rotating drum 2 is rotated, the laundry is inclined forward in the rotating drum 2. "Because of the effect of lifting, the front / rear position of the laundry can be changed, the washing unevenness is reduced, and the washing performance can be improved."

JP 2006-75479 A

  However, when the tilt angle of the drum approaches horizontal (for example, the angle between the drum rotation axis center line and the ground installation surface of the housing is 0 ° to 9 °), in the configuration of Patent Document 1, the laundry is on the front side. For example, the laundry is easily sandwiched between the door glass and the balance ring. As a result, the laundry is not sufficiently agitated in the washing step, resulting in large washing unevenness and reduced washing performance.

  Then, this invention makes it a subject to provide the drum-type washing machine which suppressed washing unevenness and improved washing performance.

  As an example, the present invention provides a cylindrical outer tub provided in an outer frame housing for storing washing water, a cleaning drum tub provided rotatably in the outer tub, and an inner periphery of the cleaning drum tub. A lifter that scrapes and drops the laundry in the washing drum tub, and an electric motor that rotationally drives the washing drum tub, and the lifter is on the front side of the washing drum tub. A front surface portion formed along a substantially vertical direction with respect to the rotation axis center, and a back surface portion formed on the rear side and along a substantially vertical direction with respect to the rotation axis center of the cleaning drum tank. The circumferential length of rotation of the cleaning drum tank of the portion is longer than the circumferential length of rotation of the cleaning drum tank of the back surface portion.

  ADVANTAGE OF THE INVENTION According to this invention, the washing machine which can provide the drum type washing machine which suppressed washing nonuniformity and improved washing | cleaning performance can be provided.

It is a figure which shows the outline | summary of the drum type washing machine concerning the Example of this invention. It is the figure which looked at the washing drum tank from the inlet side. It is the figure which looked at the washing drum tank from the side. It is the perspective view which looked at the lifter 16 from the front upper side. It is the perspective view which looked at the lifter 16 from the rear side (back side) upper direction. It is the figure which looked at the lifter 16 from the front side. It is the figure which looked at the lifter 16 from the rear side. It is the figure which looked at the lifter 16 from right above. It is the figure which looked at the lifter 16 from the side. It is a figure which shows a movement of a washing | cleaning drum tank and clothing. It is a figure which shows the washing driving process concerning the Example of this invention. It is a block circuit diagram concerning the Example of this invention.

  Embodiments of the present invention will be described with reference to the drawings. First, the outline of the drum type washing machine will be described with reference to FIG.

  The drum type washing machine has a bottomed cylindrical outer tub 2 inside an outer frame housing 1.

  The outer tub 2 is supported from below by a plurality of suspensions 3. The outer tub 2 is suspended and supported by a pulling spring 4 from the upper part thereof.

  The suspension 3 supports almost the entire weight including the outer tub 2, has a strong elastic support structure, and is fixed to the outer frame base 20 of the outer frame housing 1. In particular, a damping mechanism or the like is provided for absorbing strong vertical vibration of the outer tub 2 that occurs during the dehydration operation and preventing abnormal vibration of the outer tub 2 that occurs when dehydration is started.

  The mounting position of the suspension 3 is provided within the range of 50 mm in the front and rear with respect to the position of the center of gravity or the position of the center of gravity of the outer tub 2 particularly for the purpose of reducing vibration during dehydration.

  Since the outer tub 2 is provided so as to be inclined so that the rear end side is downward, when the suspension 3 is positioned on the rear side, the height of the suspension 3 is reduced and the stroke of the suspension 3 is reduced.

  For this reason, in order to maintain the damping function of the suspension, it is more desirable that the mounting position of the suspension 3 is located substantially on the center side of the outer tub 2 than the rear position.

  Further, the pulling spring 4 that is suspended and supported from the upper part of the outer tub 2 is an auxiliary support mechanism for the sun suspension 3 provided to prevent the outer tub 2 from falling.

  A water supply electromagnetic valve 6 and a detergent charging case 8 are provided inside the upper side of the outer frame housing 1. The detergent charging case 8 is connected to communicate with the water supply electromagnetic valve 6 through the water injection hose 7.

  A water supply hose 5 is connected to the water supply electromagnetic valve 6. The tip of the water supply hose 5 is connected to a tap (not shown).

  When washing is too easy, the water supply electromagnetic valve 6 is opened, and water necessary for washing and washing is supplied from the water injection hose 7 to the detergent charging case 8.

  A detergent necessary for washing is put into the detergent charging case 8.

  Further, at the time of rinsing, a softening finish for improving the finish of the laundry 9 is put into the case portion for storing the finish provided in the detergent charging case 8 and automatically put into the outer tub 2 as necessary. .

  That is, at the time of washing, the water supplied from the water injection hose 7 dissolves the detergent in the detergent charging case 8, flows through the flexible hose 10, and enters the inside of the washing drum tank 11 from the inlet 24 provided at the upper part of the outer tank 2. It is thrown into.

  The injection port 24 is arranged in such a direction that the melted detergent is sprayed from the entrance of the cleaning drum tank 11 to the back.

  The cleaning drum tank 11 is rotatably installed in the outer tank 2. The cleaning drum tank 11 having a bottomed cylindrical shape provided with an inlet on the front side is arranged so that the front end faces the front side of the outer frame housing 1 and the rear end faces the rear side of the outer frame housing 1. .

  The outer tub 2 in which the cleaning drum tub 11 is placed is also arranged so that it faces the front side of the outer frame housing 1 and the rear end faces the rear side of the outer frame housing 1.

  The outer tub 2 and the cleaning drum tub 11 are placed so that their cylindrical axes are concentric, and the charging port 11 a of the cleaning drum tub 11 and the charging port 11 b of the outer tub 2 are provided on the outer frame housing 1. It arrange | positions so that the insertion port 11c provided in the front side may be faced.

  The outer tub 2 and the cleaning drum tub 11 are arranged so as to be inclined so that the front end side where the charging port 11b is provided is up and the rear end side is down. The inclination angle (angle of the axial center line with respect to the horizontal line) θ1 is, for example, about 5 degrees. In this embodiment, the tilt angle θ1 can be selected as appropriate within a range of 0 to 9 degrees.

  The outer frame housing 1 is provided with an outer lid 12 that opens and closes the insertion port 11c. When the laundry is put in and out of the washing drum tub 11, the outer lid 12 is opened and closed.

  The bellows 21 is attached in a watertight manner to the mouth edge of the inlet 11 c of the outer frame housing 1 and the inner edge of the inlet 11 b of the outer tub 2. The water-tightness between the outer frame casing 1 and the outer tub 2 is maintained by the bellows 21 made of this rubber (elastic body).

  Since the inner side of the outer lid 12 is in close contact with the bellows 21, no water leaks from the inlet 11c of the outer frame housing 1 to the outside.

  The cleaning drum tank 11 has a balancer 13. The inner peripheral side of the balancer 13 is the aforementioned inlet 11a. The balancer 13 reduces vibration during dehydration.

The cleaning drum tank 11 has a plurality of dewatering holes 14 in the cylindrical portion. At the time of dehydration, water contained in the laundry is dehydrated into the outer tub 2 by centrifugal force through the dehydration hole 14.
The DC brushless motor 19 is attached and fixed to the rear outer surface of the outer tub 2. The DC brushless motor 19 is a drive source that rotationally drives the cleaning drum tank 11.

  The cleaning drum tank 11 has a flange 17 at the rear end on the bottom side of the cylindrical portion. A main shaft 18 provided on the flange 17 is coupled to a rotor side of a DC brushless motor 19 which is an electric motor. Thus, the cleaning drum tank 11 is rotatably supported by the outer tank 2 via the DC brushless motor 19 as a driving source.

  The drainage hose 23 of the drainage channel is provided so as to communicate with the rear lower part of the outer tub 2. In this drainage channel, a drainage electromagnetic valve 22 is provided. By opening the drain electromagnetic valve 22, the washing water 30 and the rinsing water accumulated in the outer tub 2 are drained outside the machine through the drain hose 23.

  The drainage hose 23 of the drainage channel penetrates the outer frame base 20 and the downstream end is inserted into the drainage hole of the house.

  FIG. 2A is a view of the cleaning drum tank 11 as viewed from the inlet 11b side. As shown in FIG. 2A, the cylindrical portion of the cleaning drum tank 11 is provided with a plurality (three in this embodiment) of lifters 16 on the inner periphery.

  FIG. 2B is a view of the cleaning drum tank 11 as viewed from the side. As shown in FIG. 2B and the like, the shaft center 16a of the lifter 16 is disposed substantially in parallel with the main shaft 18 that is the drum rotation shaft center line.

  FIG. 3 is a view showing the lifter 16. FIG. 3A is a perspective view of the lifter 16 as viewed from the upper front side. FIG. 3B is a perspective view of the lifter 16 as seen from above the rear side (back side). FIG. 3C is a view of the lifter 16 as viewed from the front side. FIG. 3D is a view of the lifter 16 as seen from the rear side. FIG. 3E is a view of the lifter 16 viewed from directly above. FIG. 3F is a view of the lifter 16 as viewed from the side. The lifter 16 will be described in detail with reference to FIG.

  The lifter 16 is on the front side and has a front surface portion 16b that forms a substantially triangular or trapezoidal surface along a direction substantially perpendicular to the shaft center 16a, and on the rear side (back surface side), the shaft center 16a And a back surface portion 16c that forms a substantially triangular or trapezoidal surface along a substantially vertical direction. Further, the lifter 16 includes a top portion 16e that is parallel to the axial center 16a and is located at the top portion of the lifter 16, and side portions 16d that are respectively disposed on the left and right sides so as to face each other with the top portion 16e interposed therebetween. Further, the side surface portion 16 d has an inclined surface that gradually inclines from the top portion 16 e toward the surface of the cleaning drum tank 11. A side surface portion 16d and a top portion 16e are disposed between the front surface portion 16b and the back surface portion 16c.

  The circumferential length of the drum tank rotation in the front surface portion 16b (the bottom portion of the front surface portion 16b having a substantially triangular shape or a substantially trapezoidal shape in FIG. 3C) 16b-1 is the circumference of the drum rotation of the back surface portion 16c. The length in the direction is longer than 16c-1. 3E, when the lifter 16 is viewed from directly above, the side 16c-1 and the side 16b-1 are an upper base and a lower base, and the side 16b- is more than the side 16c-1. 1 has a longer substantially trapezoidal shape.

  Here, when the inclination angle of the cleaning drum tank 11 approaches horizontal (for example, the angle between the main shaft 18 that is the drum rotation axis center line and the ground installation surface X0 of the housing is 0 ° to 9 °), the laundry is When it becomes easy to be biased toward the front side, and especially the amount of laundry to be accommodated increases, for example, the laundry is likely to be sandwiched between the door glass and the balance ring. As a result, the agitation of the laundry in the washing process and the drying process becomes insufficient, the washing unevenness and the drying unevenness increase, and the washing / drying performance is lowered.

  However, even in such a case, if the lifter 16 of the present embodiment is used, the laundry can be easily moved to the back side.

  The radial height 16b-3 of the drum tank rotation of the front surface portion 16b is higher than the radial height 16c-3 of the drum tank rotation of the back surface portion 16c. This further facilitates moving the laundry to the back side.

  Further, the side surface portion 16d has a curved surface shape as shown in FIGS. 3 (a), (b), and (e). Thereby, it becomes easy to move the laundry to the back side without damaging it.

  Further, the top portion 16e has an inclined portion 16e-1 having a larger inclination than other portions on the rear end side. The inclined portion 16e-1 can reduce the possibility that the laundry is caught between the flange 17 and the lifter 16 disposed at the rear end on the bottom side of the cylindrical portion.

  The effect obtained by the shape of the lifter 16 as described above will be described with reference to FIG. As shown in FIGS. 4-a and 4-b, the clothes easily move to the back (rear side) in both cases of normal rotation of the drum (counterclockwise) and reverse of the drum (clockwise). Thereby, even if it is a case where the inclination angle of the cleaning drum tank 11 approaches horizontal, the washing nonuniformity at the time of washing and the dry nonuniformity at the time of drying can be reduced, and washing | cleaning performance and drying performance can be improved.

  The angle α formed by the side 16b-1 and the other side 16b-2 is preferably 30 ° to 45 °. The smaller the angle α, the larger the side 16b-1, and the larger the difference between the side 16b-1 and the side 16c-1, the larger the curved surface portion (R shape) formed by the side surface portion 16d. It becomes easier to move objects on the back side. However, if the lifter 16 becomes too large, the washing capacity is reduced. Therefore, various sizes may be appropriately designed in relation to the washing capacity.

  The operation process of the washing machine will be described with reference to FIG.

  This operation process removes dirt attached to the laundry, rinses the detergent with a rinse, and removes lint. In addition, an automatic washing operation process in which the washing water contained in the laundry is automatically dewatered and drained from the dewatering hole 14 by the rotation of the washing drum tank 11 by the centrifugal force is shown.

  First, the water supply electromagnetic valve 6 is turned on to perform water supply S101. Water supply is performed up to a predetermined amount of water.

  In washing S102, when washing water necessary for washing is supplied, the DC brushless motor 19 rotates to rotate the washing drum tank 11, and washing is performed. By controlling the DC brushless motor 19 so as to rotate forward and backward, the washing drum tank 11 is subjected to a washing operation in which forward / reverse rotation is repeated.

  When washing S102 is completed, the drain electromagnetic valve 22 is opened, and the washing water is drained outside the machine through the drain hose 23 (S103).

  After the drainage S103 is completed, the process proceeds to dehydration (1) S104 for dehydrating the detergent contained in the laundry.

  Dehydration (1) In S104, the washing tub 3 is rotated at high speed, and the washing water contained in the laundry is dehydrated through the dewatering holes 14 opened in the washing tub 3 by centrifugal force.

  When the dehydration (1) S104 is completed, the detergent contained in the laundry is rinsed, and the process proceeds to the rinse (1) S106.

  Rinse (1) S106 is executed after the water supply S105 is completed. When rinsing (1) S106 is completed, drainage S107 and dewatering (2) S108 are performed, and water supply S109 is performed in the same manner as rinsing (1). Then, the entire process is completed through rinsing (2) S110, drainage S111, and final dehydration S112.

  If it is set so that drying is performed after washing, the drying step S113 is continued and the process reaches the end S114.

  An outline of the block circuit diagram will be described with reference to FIG.

  FIG. 6 shows a block control circuit for controlling processes from washing, rinsing and dehydration.

  The control circuit board 99 includes a timer 100 of a clock pulse generating means, a central processing unit (CPU) 101, a memory 102, an input port 103, an output port 104, and the like.

  The central processing unit 101 includes a calculation unit 105 and a control unit 106.

  The washing machine is driven by exchanging data with the central processing unit 62, the timer 63, and the memory 64.

  The central processing unit (CPU) 101 is basically a control command fetching, decoding, and execution command. Specifically, the central processing unit (CPU) 101 controls the arithmetic operation and reads the contents of the memory designated address, and sends the designated address to the input / output device. Controls programs for input / output, fully automatic courses, and annual settings.

  The memory 102 is provided with two types, a RAM 107 having a function of reading and writing program data and a ROM 108 having only a read-only function. The RAM 107 mainly stores data necessary for the washing operation conditions, and is used as a work area for creating a set program.

  The ROM 108 is used when a predetermined program or fixed data is entered and the same processing is performed at any time.

  The input port 103 is interposed between the central processing unit (CPU) 101 and the input circuit unit 105 to exchange data. The output port 104 is interposed between the central processing unit (CPU) 101 and the output drive circuit unit 106 to exchange data.

  Connected to the input circuit section 116 are a power switch 107, a water level sensor 108, a Hall IC 109, a lid opening / closing sensor 110, a fully automatic selection key 111, a manual setting key 112, a start / stop key 113, a cloth amount sensor 114, and a humidity sensor 115. The

  A DC brushless motor 19, a water supply electromagnetic valve 6, a drainage electromagnetic valve 22, a lid lock solenoid 40, an end buzzer 31, and the like are connected to the output drive circuit unit 117.

  The cylindrical washing drum tank 11 has a number of dewatering holes 14 around it, and performs centrifugal dewatering of the laundry 9. The side plate of the cleaning drum tank 11 has an inlet 11a. The laundry 9 is taken in and out through the insertion port 11a.

Claims (5)

A cylindrical outer tub provided in an outer frame housing for storing washing water, a cleaning drum tub rotatably provided in the outer tub, and an inner periphery of the cleaning drum tub, the cleaning drum tub A lifter that scrapes and drops the laundry inside, and an electric motor that rotationally drives the washing drum tub,
The lifter is on the front side and formed in a substantially vertical direction along the rotation axis center of the cleaning drum tank, and on the rear side in a direction substantially perpendicular to the rotation axis center of the cleaning drum tank. And a back portion formed along,
The drum-type washing machine according to claim 1, wherein a circumferential length of the front portion of the cleaning drum tub is longer than a circumferential length of the rear portion of the cleaning drum tub. The drum-type washing machine according to claim 1,
A top portion that is parallel to the rotation axis center of the cleaning drum tank and is located at the top portion of the lifter, and is arranged to face the top portion so as to be inclined, and is inclined from the top portion toward the surface of the cleaning drum tank. A side portion having an inclined surface;
The drum type washing machine, wherein the top portion and the side portion are disposed between the front portion and the back portion. The drum-type washing machine according to claim 1 or 2,
The drum type washing machine, wherein an angle formed between a rotation axis center line of the washing drum tank and a ground installation surface of the outer frame casing is 0 ° to 9 °. The drum type washing machine according to any one of claims 1 to 3,
The drum-type washing machine according to claim 1, wherein a height of the front surface portion in the radial direction of rotation of the cleaning drum tank is higher than a height of the rear surface portion in the radial direction of rotation of the cleaning drum tank. The drum-type washing machine according to claim 2,
The drum-type washing machine, wherein the side portion has a curved shape.

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