JP2012170698A - Drum-type washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drum-type washing machine that can perform a smooth start-up of a dewatering process especially for a small volume of clothing.SOLUTION: A drum-type washing machine is provided, in which a support damper 51 for supporting a water tub unit 49 from below is disposed on a front side of the center of gravity of the water tub unit 49, and a vibration-proof damper 91 is disposed on a back side of the center of gravity of the water tub unit 49, and a spring body 50 for suspending the water tub unit 49 is disposed on approximately the same vertical plane as that of the center of gravity of the water tub unit 49, and vibration detecting means 78, a motor 45 and the vibration-proof damper 91 are arranged on approximately the same vertical plane. Accordingly, especially when dewatering a small volume of clothing, the washing machine can detect vibration of the dewatering with high accuracy to perform dewatering rotation control to reduce the vibration, thereby allowing the process to be proceeded without interruption.

Description

  The present invention relates to a drum type washing machine for washing laundry contained in a rotating drum.

  Conventionally, it has been proposed that this type of drum-type washing and drying machine performs dehydration rotation control in accordance with the output of a vibration detection device provided in a water tank (see, for example, Patent Document 1).

  FIG. 4 is a longitudinal sectional view of a conventional drum type washing machine described in Patent Document 1, and FIG. 5 is an internal front view of a main part of the drum type washing machine.

  4 and 5, a water tank 20 containing a drum 21 that is rotationally driven around a horizontal axis 22 is suspended from a main body 18 by two pairs of spring bodies 26, and a pair of vibration-proof dampers 27. Therefore, the anti-vibration support is provided from the bottom of the main body 18. Further, a weight 28 for suppressing vibration of the water tank 20 is provided at the front portion of the water tank 20. The water tank 20 is provided with a vibration detection device 30 that detects the vibration amplitude of the water tank 20 using an acceleration sensor. The vibration detection device 30 is provided at a position symmetrical to the motor 24 disposed in the lower corner portion of the main body 18 with respect to the central axis 34 of the water tank 20, and when the clothes become unbalanced, The maximum vibration value of the water tank 20 that vibrates about a certain motor 24 as a center of revolution is detected.

JP-A-6-233890

  Generally, since the drum type washing machine is supported by a cantilever structure, the front side of the entire water tank tends to vibrate greatly during dehydration. For this reason, even in the conventional configuration, a weight is provided at the front part of the water tank, and no reference numeral is given, but a seal packing is provided between the water tank and the main body for the purpose of water sealing. In addition, since the seal packing is also vibration proof, the amplitude on the front side of the water tank is suppressed.

  However, in the conventional configuration, when there are many clothes, the clothes are diffused over the entire surface of the drum, and the vibration of the water tank during dehydration does not become extremely large. When the mass comes to the front part, because it is a small amount of clothing, vibration is suppressed to some extent by the weight and seal packing as described above, but when the mass gathers at the rear of the drum, The motor at the bottom of the water tank also affects the unbalanced load together with the clothing, and the vibration on the rear side of the water tank becomes extremely large. However, at this time, since the vibration dampers are only arranged in a pair at the substantially central part of the lower part of the water tank, it is difficult to control the dehydration rotation by accurately detecting the vibration of the water tank and to suppress the vibration. was there.

  The present invention solves the above-mentioned conventional problems, and detects the vibration of the water tank with high accuracy, particularly when a small amount of clothes is dehydrated, and controls the dehydration rotation to suppress vibration. An object is to provide a washing machine.

  The present invention solves the above-mentioned conventional problems, a washing machine housing, a rotating drum formed in a bottomed cylindrical shape and having a substantially horizontal rotation center axis, a water tank that rotatably includes the rotating drum, A motor provided at a lower portion of the water tub for rotationally driving the rotary drum; a spring body for suspending a vibrating water tank unit comprising the rotary drum, the water tank, and the motor; and the lower part of the water tank unit. A support damper that supports the lower side of the water tank unit, a vibration-proof damper that supports the lower side of the water tank unit and that is provided in a direction that falls below the support damper, and a vibration that is provided at a substantially symmetrical position with respect to the rotation axis. And a control means for controlling each step of washing, rinsing, dehydration and the like by controlling the motor and the like, and the support damper is located on the front side of the center of gravity of the water tank unit. The vibration damper is disposed behind the center of gravity of the aquarium unit, and the spring body is disposed on substantially the same vertical plane as the center of gravity of the aquarium unit. The anti-vibration damper is disposed on the substantially same vertical plane as the center of gravity of the motor.

  This makes it possible to detect vibrations accurately, especially when a small amount of clothes is dehydrated, and to suppress the vibrations by controlling the dehydration rotation. There is no need to do so, and the process can be completed to the end.

  The drum type washing machine of the present invention can detect the vibration accurately and control the dehydration rotation especially when a small amount of clothes is dehydrated, so that the process proceeds to the end without stopping the process halfway. Can be finished.

The longitudinal cross-sectional view of the drum type washing machine in embodiment of this invention Inside front view of the drum type washing machine Block diagram of the drum type washing machine Vertical section of a conventional drum-type washing machine Inside front view of the drum type washing machine

  The first invention is a washing machine housing, a rotating drum having a bottomed cylindrical shape and having a substantially horizontal rotation center axis, a water tank that rotatably includes the rotating drum, and a lower part of the water tank. A motor that rotationally drives the rotary drum, a spring body that suspends the vibration-type water tank unit comprising the rotary drum, water tank, motor, and the like from the washing machine housing, and a support damper that supports the lower side of the water tank unit; An anti-vibration damper that supports the lower side of the aquarium unit and is provided in a direction that falls below the support damper; and a vibration detection means that can detect vibration provided at a position substantially symmetrical to the motor with respect to the rotation center axis; Control means for controlling each step of washing, rinsing, dehydration and the like by controlling the motor and the like, the support damper is disposed in front of the center of gravity of the water tank unit, and the vibration damper is The spring body is disposed on the rear side of the center of gravity of the water tank unit, the spring body is disposed on substantially the same vertical plane as the center of gravity of the water tank unit, and the vibration detecting means and the vibration damping damper are disposed on the center of gravity of the motor. Because it is placed on almost the same vertical plane as that, especially when a small amount of clothes is dehydrated, its vibration can be accurately detected and controlled by dehydration rotation, so it can be dehydrated due to imbalance abnormality. It becomes impossible to start up, and the process is not interrupted, and the process can be completed to the end.

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

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a drum type washing machine according to an embodiment of the present invention, and FIG. 2 is a front view of the inside of the drum type washing machine as viewed from the front.

  1 and 2, a water tub 42 is swingably disposed inside a washing machine housing 41, and a rotating drum 43 is rotatably disposed in the water tub 42. A rotation shaft (rotation center shaft) 44 is provided in the horizontal direction at the rotation center of the rotary drum 43, and a motor attached to the rotation shaft (rotation center shaft) 44 at the lower left portion when viewed from the front at the bottom rear surface side of the water tank 42. 45 are connected via a belt 46, and the rotary drum 43 is rotated in the forward and reverse directions by the motor 45. Several protrusion plates 47 for stirring the laundry are provided on the inner wall surface of the rotating drum 43. In addition, a large number of water passage holes 48 are provided on the entire outer periphery of the rotating drum 43.

  The water tank 42, the rotary drum 43, the motor 45, and the like described above constitute a vibration water tank unit 49.

  The weight of the water tank unit 49 is supported by a plurality of dampers for damping and vibration damping attached to the lower part of the rinsing machine housing 41. Further, the water tank unit 49 is symmetrical between the upper part of the washing machine housing 41 and the water tank 42 as viewed from the front. A pair of spring bodies 50 are provided and are supported in a vibration-proof manner so as to be swingable.

  The pair of spring bodies 50 are disposed on the substantially same vertical plane as the gravity center position Gs of the water tank unit 49.

  The dampers are paired symmetrically when viewed from the front and are disposed on the front side of the center of gravity Gs in the direction of the rotation axis (rotation center axis) 44 of the water tank unit 49 for the purpose of supporting the water tank unit 49 and suppressing vibrations. The support damper 51 is arranged on the rear side of the center-of-gravity position Gs, and the vibration damper of the water tank unit 49 is particularly designed to suppress vibration. As a result, the water tank unit 49 is supported in a well-balanced manner by the respective dampers, and damping vibration isolation is performed.

  This damper is a friction damper, and a friction pad (not shown) is housed inside. A frictional force is generated by friction between the friction pad and a tube (not shown), resulting in a damping force. .

  As shown in FIG. 2, the vibration damping damper 91 is disposed at a position where the compression force is applied to the water tank unit 49 in the dewatering rotation direction of the rotating drum 43. That is, during the dehydration process, when the rotation direction of the rotary drum 43 is the left-turned (counterclockwise) arrow A when viewed from the front, it is at the lower right side when viewed from the front, and the housing support part at one end of the vibration damping damper 91 A line connecting the frame support part 93 and the water tank support part 94 at the other end of the vibration isolating damper 91 is arranged at an angle α in the downward direction, rather than a line connecting the center position O of the water tank 93 and the water tank 42. Further, the mounting position of the anti-vibration damper 91 in the vertical direction with respect to the water tank unit 49 is disposed below the support damper 51 (the direction in which the arrangement angle is tilted).

  The damping force of the support damper 51 and the vibration damping damper 91 may be the same, or the damping force of the vibration damping damper 91 may be slightly weaker than that of the support damper 51.

  In addition, vibration detection means 78 using an acceleration sensor for detecting vibration of the water tank unit 49 is disposed at a position substantially symmetrical to the motor 45 with respect to the rotation axis (rotation center axis) 44 at the upper rear side of the water tank 42. Instead of acceleration in one direction, vibrations in the three-dimensional directions of front and rear (X-axis direction), left and right (Y-axis direction), and vertical (Z-axis direction) are detected to control the operation. This is because the actual vibration of the water tank unit 49 is not necessarily limited to one direction, and is therefore detected with high accuracy using a multi-axis acceleration sensor.

  The vibration detecting means 78, the gravity center position Gm of the motor 45, and the vibration damping damper 91 are disposed on substantially the same vertical plane.

  Further, a casing opening (not shown) provided in the washing machine casing 41 on the front side of the water tub 42 is covered with a lid 52 so as to be openable and closable. The lid 52 connects the front of the water tub 42 and the casing opening. It is sealed and opened through a seal packing 92 made of a rubber material or the like that serves as an anti-vibration and water seal. By opening the lid 52, the inside of the rotary drum 43 is passed through the clothing entrance 53. The laundry can be taken in and out.

  In addition, this drum type washing machine has a function of automatically controlling the motor 45, the water supply system 54, the drainage system 55, and the water circulation system 56 according to the mode setting and control program to perform at least a washing process, a rinsing process, and a dehydrating process. is doing.

  The water supply system 54 includes a first water supply hose 59 or a second water supply hose by opening and closing the first electromagnetic valve 57 (first water supply means) or the second electromagnetic valve 58 (second water supply means). Water can be supplied from the water supply path 62 into the water tank 42 in a timely manner through the detergent storage 61 that passes through 60 and stores a detergent and a soft finish and stores a drawer (not shown) that can be pulled out from outside.

  The drainage system 55 has a drainage pipe 64 connected to a drainage port 95 provided in a recess 71 formed in the bottom of the water tank 42 when necessary, such as at the end of a washing process or at the end of a rinsing process, by driving a drainage pump 63. Through the lint filter 65 that is installed in the filter case 88 and collects lint that is removable from the outside of the front lower portion of the washing machine housing 41 by the filter knob 89, and then passes through the drainage pump 63. The water can be drained from a drain hose 66 arranged from the inside of the machine to the outside of the machine. The filter case 88 is disposed in the lower right front portion of the washing machine housing 41 for the operability of the filter knob 89. In order to efficiently connect the drain pipe 64, the drain port 95 is provided from the front side. As seen, the water tank 42 is provided on the right side of the vertical center.

  The water circulation system 56 circulates the water in the water tank 42 as necessary during the pre-washing process, the washing process, the rinsing process, and the like, thereby preventing the premature dissolution and unevenness of the detergent and improving the function of easy washing. The water circulation system 56 drives the circulation pump 67 to pass the washing water in the water tank 42 through the drainage filter 65 via the drainage pipe 64, and the inflow side path 68 to the circulation pump 67, the circulation pump 67 and Through the discharge side path 69 from the circulation pump 67, the water is repeatedly discharged into the rotary drum 43 as the circulating water indicated by the solid line arrow from the inner front outlet 70 of the water tank 42. A plurality of jet outlets 70 are provided in the circumferential direction, and the circulating water is discharged from all directions of the circumference.

  The recess 71 formed at the bottom of the water tank 42 is provided with a hot water heater (heating means) 72 such as a sheathed heater for heating the washing water in the horizontal direction. By discharging the washing water into the rotating drum 43 as described above, the washing water is sprinkled on the laundry and the washing water is circulated again. Since the heated washing water is sprinkled on the laundry, the molecular activity of the washing water is increased and the activation of the detergent is increased, so that the washing power can be increased and washing unevenness can be reduced. In the vicinity of the hot water heater 72, a temperature detection means 73 such as a thermistor for detecting the water temperature is provided.

In addition, an air trap 74 is configured on the side wall of the outer periphery of the bottom of the outer tub 42 in communication with the drain pipe 64. The air trap 74 is provided inside the upper portion of the washing machine housing 41 by an air pipe 75, and is provided with a pressure sensor or the like. It is connected to the constructed water level detection means 76, and can detect the water level in a plurality of stages by the water pressure of the washing water supplied into the outer tub 42.

  In addition, the rear upper part of the detergent container 61 provided in the upper part of the washing machine housing 41 and the upper part of the water tank 42 are connected by a connecting hose 77, and the air in the water tank 42 is pressurized by the stroke operation operation. It plays the role of pulling out.

  The mode such as the driving course and various functions are selected by the user by inputting to the input setting means 80 from the operation display means 79 provided at the upper front of the washing machine housing 41, and inside the upper portion of the washing machine housing 41. The arranged control device 81 is displayed on the display means 96 (see FIG. 3) on the operation panel 79 based on the input information to notify the user.

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

  In FIG. 3, the control means 82 of the control device 81 is constituted by a microcomputer or the like, and starts operation when power is supplied from a commercial power supply 83 by turning on the power switch 84, a water level detection means 76, a temperature detection means 73, The output of the rotational speed detection means 90 for detecting the rotational speed of the rotary drum 43 to be connected by detecting the rotational speed of the cloth amount detection means 85, the vibration detection means 78, and the motor 45 is input to the input setting means 80. The setting contents are displayed on the display means 96 based on the contents set by the user's input, and the motor 45, the hot water heater 72, the second heater are connected via the load driving means 86 constituted by a bidirectional thyristor, a relay and the like. The operations of the first solenoid valve 57, the second solenoid valve 58, the drainage pump 63, the circulation pump 67, and the like are controlled to control the steps of washing, rinsing, and dehydration. If there is any abnormality in the operation, the display means 96 displays that it is abnormal and notifies the notification means 87. The input setting means 80 and the display means 96 constitute an operation display means 79.

  About the drum type washing machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  In the dehydration process, in a normal unbalanced state, the vibration of the water tank unit 49 is caused by a pair of spring bodies 50, a pair of support dampers 51, one vibration damper 91, and each part of the water tank unit 49 (not shown). The vibration is attenuated in a well-balanced manner by the weight provided in the

  However, especially when a small amount of clothing is dehydrated and an imbalance abnormality occurs, the projection plate 47 in the rotating drum 43 also acts, and the clothing tends to gather together and gather at the rear of the rotating drum 43. At this time, the support damper 51 is disposed on the front side of the center of gravity of the water tank unit 49, and the spring body 50 is disposed on substantially the same vertical plane as the center of gravity of the water tank unit 49. Since the weight of the water tank unit 49 is small, the anti-vibration property of the seal packing 92 works effectively on the front side of the water tank unit 49, and the rear side of the water tank unit 49 vibrates greatly.

  In addition, since the heavy motor 45 is attached to the lower left portion when viewed from the front on the bottom rear surface side of the water tank 42, the water tank unit 49 attempts to vibrate with the motor 45 as a substantially revolving center when viewed from the front. At the same time, in the case of a left turn with a small amount of clothes, the clothes easily lift up to the upper right when viewed from the front by the rotating drum 43, so the aquarium unit 49 also vibrates greatly from the upper right to the upper left when viewed from the front. .

Due to the two movements of the water tank unit 49 described above, vibration detection is provided at a position substantially symmetrical with the motor 45 and arranged on the same vertical plane as the gravity center position Gm of the motor 45 in the direction of the rotation axis (rotation center axis) 44. The means 78 detects the maximum vibration value, and can accurately detect the unbalanced state of the water tank unit 49. Further, the vibration isolating damper 91 is disposed on the vertical plane substantially the same as the gravity center position Gm of the motor 45 with respect to the aquarium unit 49 that vibrates greatly from the upper right direction to the upper left direction when viewed from the front and then vibrates from the lower left direction to the lower right direction. The line connecting the frame support part 93 and the aquarium support part 94 has a lower angle α than the line connecting the frame support part 93 and the rotation center position O of the water tank 42 at the lower right side when viewed from the front. With this arrangement, a compressive force effectively acts in the counterclockwise rotation direction of the rotating drum 43, and vibrations in the vertical and horizontal directions of the water tank unit 49 can be efficiently damped.

  As described above, in the present embodiment, the support damper that supports the aquarium unit from below is disposed on the front side of the center of gravity of the aquarium unit, the vibration damper is disposed on the rear side of the center of gravity of the aquarium unit, and The spring body for suspending the aquarium unit is disposed on the substantially same vertical plane as the center of gravity of the aquarium unit, and the vibration detecting means and the vibration damping damper are disposed on the substantially same vertical plane as the center of gravity of the motor. In particular, when a small amount of clothes is dehydrated, the vibrations can be accurately detected and controlled by dehydrating rotation, so the dehydration can not be started due to an imbalance abnormality, and the process is stopped halfway There is nothing, and the process can be completed to the end.

  As described above, the drum type washing machine according to the present invention can suppress the vibration by accurately detecting the vibration of the vibration system and controlling the dehydration rotation. Applicable to machine applications.

41 Washing machine housing 42 Water tank 43 Rotating drum 44 Rotating shaft (Rotating center shaft)
45 Motor 49 Water tank unit 50 Spring body 51 Support damper 78 Vibration detection means 82 Control means 91 Anti-vibration damper

Claims (1)

A washing machine housing, a rotating drum formed in a cylindrical shape with a bottom and having a substantially horizontal rotation center axis, a water tank that rotatably includes the rotating drum, and a rotary tank that is provided at a lower portion of the water tank and rotationally drives the rotating drum. A motor, a spring body that suspends a vibrating water tank unit comprising the rotating drum, water tank, motor, and the like from the washing machine housing; a support damper that supports a lower side of the water tank unit; and a lower side of the water tank unit An anti-vibration damper that is provided in a direction that tilts more than the support damper, vibration detection means that is capable of detecting vibration substantially symmetrical to the motor with respect to the rotation center axis, and controls the motor and the like. Control means for controlling each process such as washing, rinsing, dehydration, etc., the support damper is disposed in front of the center of gravity of the water tank unit, and the vibration isolating damper is the water tank unit. The spring body is arranged on the substantially same vertical plane as the center of gravity of the water tank unit, and the vibration detecting means and the vibration damper are substantially the same as the center of gravity of the motor. A drum-type washing machine arranged on a vertical surface.