JP2011167222A - Washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To insulate driving sound of a motor and driving sound generated by a pulley and belt of the motor and to suppress the heat generation of driving means. <P>SOLUTION: Transmission means 45 for transmitting the rotation of the driving means 35 to a washing and spinning tub 34 includes a first pulley 42 provided in the driving means 35, a second pulley 43 provided in the washing and spinning tub 34, and a transmission belt 44 for freely rotatably connecting the first pulley 42 and the second pulley 43. The driving means 45 and the first pulley 42 are covered with sound insulating means 46, and a cooling means 47 for suppressing the temperature rise of the driving means 35 is provided. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a washing machine for washing laundry.

  Conventionally, this type of washing machine has been considered to insulate the noise generated by the motor. The motor is covered with a stretchable sound insulation member, one end of the sound insulation member is fixed near the motor, and the sound insulation member is connected to the motor. A communication path that communicates with the outside of the main body of the washing machine is provided (see, for example, Patent Document 1).

  FIG. 7 shows a configuration of a sound insulation member of a conventional washing machine described in Patent Document 1. As shown in FIG. 7, the sound insulation member 8 is formed of a material such as rubber or resin, and houses a motor 9 and a cooling fan 10 therein. One end of the sound insulating member 8 is fixed to the rear part of the washing machine body 1 and the other end is fixed to the outer tub 3 in the vicinity of the motor 9. The sound insulation member 8 is provided with a concavo-convex portion 11 so as to be extendable and contractible.

  The sound insulating member 8 is divided into upper and lower parts by a partition plate 13 and is provided with communication passages 12 a and 12 b, which communicate the motor 9 with the outside of the washing machine body 1. The communication path 12a provided on the upper side cools the motor 9 by external air flowing from the outside of the washing machine body 1 toward the motor 9, and the communication path 12b provided on the lower side allows the air after cooling the motor 9 to flow. It flows to the outside of the washing machine body 1.

  The rotation of the motor 9 is transmitted to a transmission mechanism (not shown) via the pulley 14 and the belt 15. Washing and dehydration are performed by the rotation of the motor 9, and noise generated by the motor 9 is sound-insulated by the sound-insulating member 8, and the motor 9 is cooled by outside air.

JP 61-265191 A

  However, in the conventional configuration, since the heat insulating passages 12a and 12b for communicating the motor 9 with the outside of the washing machine body 1 are provided in the sound insulating member 8, the noise of the motor 9 is caused by the communication passage 12a, There was a problem of leaking outside the washing machine main body 1 through 12b. In addition, the belt drive sound generated by the pulley 14 and the belt 15 outside the sound insulating member 8 cannot be sound-insulated. Therefore, there is a problem in that during high-speed dehydration of the motor 9, an unpleasant high-frequency sound is transmitted to the outside of the washing machine body 1 and the operation sound of the washing machine becomes unpleasant. That is, it is a problem to achieve both sound insulation of the drive unit and suppression of heat generation by surrounding the drive unit.

  The present invention solves the above-described conventional problems, and realizes a washing machine that can insulate a driving sound of a motor and a driving sound generated by a pulley and a belt of the motor and suppress heat generation of the driving means. With the goal.

In order to solve the above-described conventional problems, in the washing machine of the present invention, the transmission means for transmitting the rotation of the driving means to the washing and dewatering tub is the first pulley provided in the driving means, and the washing and dewatering tub And a transmission belt that rotatably connects the first pulley and the second pulley, the drive means and the first pulley are covered with a sound insulation means, and the drive The cooling means which suppresses the temperature rise of a means is provided.

  As a result, the driving sound of the motor and the driving sound generated by the pulleys and belts of the motor can be insulated, and the heat generation of the driving means can be suppressed.

  The washing machine of the present invention can insulate the driving sound of the motor and the driving sound generated by the pulley and belt of the motor, and can suppress the heat generation of the driving means.

Sectional drawing of the washing machine in Embodiment 1 of this invention AA sectional view of the washing machine in FIG. Graph showing frequency analysis of noise of the washing machine Sectional drawing of the washing machine in Embodiment 2 of this invention Sectional drawing of the washing machine in Embodiment 3 of this invention Sectional drawing of the washing machine in Embodiment 4 of this invention Cross section of the main part of a conventional washing machine

  According to a first aspect of the present invention, the outer tub elastically supported in the outer frame of the washing machine, the washing / dehydrating tub rotatably provided in the outer tub, and the rotation of the driving means provided in the outer tub A transmission means for transmitting to the cum dewatering tub, the transmission means comprising: a first pulley provided in the driving means; a second pulley provided in the washing and dewatering tub; the first pulley; A motor having a transmission belt that rotatably connects the second pulley, covering the driving means and the first pulley with a sound insulating means, and providing a cooling means for suppressing a temperature rise of the driving means; And the high frequency component of the belt driving sound generated by the pulley and belt of the motor can be removed, and an unpleasant driving sound can be shielded and the heat generation of the driving means can be suppressed.

  According to the second invention, in particular, the sound insulation means of the first invention is provided with sound insulation walls on both sides in the rotational axis direction of the drive means, and one sound insulation wall is disposed outside the first pulley, so that the drive means The drive sound emitted in the direction of the rotation axis can be reflected by the sound insulation wall, and can be effectively insulated by preventing propagation in the outer frame of the washing machine.

  According to a third aspect of the invention, in particular, the cooling means of the first or second aspect of the invention comprises a flow path through which cooling water for cooling the drive means flows, and the drive means is provided by providing the flow path upstream of the drainage means. A liquid can be used for cooling, and heat generated by the driving means can be dissipated to the cooling water, so that the temperature rise of the driving means can be efficiently suppressed.

  The fourth aspect of the invention is particularly provided with water supply means for supplying water into the outer tub of the first or second aspect of the invention, and the cooling means connects one of the water supply means to a flow path to flow tap water. As a result, the temperature rise of the driving means can be suppressed even in the drying process without using water.

  In particular, the fifth invention is provided with a circulation pump for circulating the wash water in the outer tub of any one of the first to third inventions through the flow path into the outer tub. By cooling the drive means with flowing wash water, the wash water circulates while taking heat from the drive means, so that the temperature rise of the drive means is suppressed and the wash water is heated by the heat of the drive means. The washing effect can be increased by raising the temperature of the washing water.

  In the sixth aspect of the invention, in particular, the cooling means according to any one of the first to fifth aspects of the present invention includes a heat dissipating part for dissipating the heat of the driving means in the flow path, whereby the heat of the driving means is flowed. It is possible to effectively dissipate heat to the water inside, and the temperature rise of the driving means can be efficiently suppressed.

  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 cross-sectional view of a washing machine according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, and FIG. 3 is a graph showing frequency analysis of noise of the washing machine. .

  1 to 3, the washing machine outer frame 30 elastically supports an outer tub 33 by four elastic bodies 31 and two damping devices 32. The washing / dehydrating tub 34 is rotatably disposed in the outer tub 33. The motor (driving means) 35 is composed of a brushless DC motor and is controlled by an inverter so that the rotational speed can be freely changed. The water supply means 36 supplies washing water into the washing / dehydrating tub 34. The water level detection means 37 detects the washing water level in the outer tub 33. The drainage means 38 drains the washing water in the outer tub 33.

  The control device 39 is provided at the lower front portion of the washing machine outer frame 30. The control device 39 sequentially controls each step of washing, rinsing and dehydration based on the setting contents inputted by the operation display means 40 provided on the upper front surface of the washing machine outer frame 30. The power switching means (FIG. The motor 35, the water supply means 36, the drainage means 38, etc. are sequentially controlled via a not shown).

  The damping device 32 is a viscous damper that uses oil as a working fluid, and reduces the resonance vibration amplitude of the outer tub 33 at the time of dehydration start. The damping device 32 is provided between the bottom 30 a of the washing machine outer frame 30 and the bottom 33 a of the outer tub 33. It is fixed to. The legs 41 are made of an elastic material such as rubber and are arranged at the four corners of the bottom 30 a of the washing machine outer frame 30.

  The motor (driving means) 35 is provided with a first pulley 42, and the washing and dewatering tub 34 is provided with a second pulley 43. The first pulley 42 and the second pulley 43 are rotatably connected by a transmission belt 44 and constitute a transmission means 45. The reduction ratio of the first pulley 42 and the second pulley 43 is set to 10: 1.

  The sound insulation means 46 is formed in a box shape with felt sound absorbing material, covers the drive means 35 and the first pulley 42, and is fixed to the bottom 33 a of the outer tub 33. The sound insulation means 46 is provided with sound insulation walls 46 a and 46 b on both sides of the drive means 35 in the direction of the rotation shaft 35 a, and one sound insulation wall 46 b is disposed outside the first pulley 42. A sound insulation wall 46c is provided to face the left and right and upper and lower side surfaces of the drive means 35, and an opening 46d through which the transmission belt 44 is passed is provided in the sound insulation wall 46c opposite to the upper side surface.

  The cooling means 47 is provided in contact with the driving means 35, and radiates heat so that the driving means 35 can be safely driven to suppress the temperature rise. A flow path through which cooling water flows on the outer periphery of the driving means 35. 48 is provided. The flow path 48 is located on the upstream side of the drainage means 38, and connects the bottom 33 a of the outer tub 33 and the flow path 48 with a pipe line 50. The water in the outer tub 33 is discharged from the drainage means 38 to the outside of the machine through the pipe line 50 and the flow path 48.

At the start of washing and rinsing, the drainage means 38 is closed, the water supplied to the outer tub 33 is filled in the flow path 48, and the heat of the drive means 35 is dissipated to the wash water in the flow path 48. can do. During the dehydration, the drainage means 38 is opened, and when the water dehydrated from the laundry passes through the flow path 48 from the conduit 50, the heat of the drive means 35 is taken and discharged from the drainage means 38 to the outside of the machine. be able to. Therefore, the heat of the drive means 35 can be radiated to the washing water flowing through the flow path 48, and the temperature rise of the drive means 35 can be efficiently suppressed by cooling with the liquid.

  About the washing machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. First, after putting laundry such as clothes and detergent into the washing and dewatering tub 34, the operation display means 40 is operated to start operation. As a result, the water supply means 36 operates, the washing water is supplied into the washing / dehydrating tub 34, and the washing / dehydrating tub 34 also starts rotating. When the specified amount of washing water is supplied, the water supply means 36 stops water supply.

  By the rotation of the washing and dewatering tub 34, the detergent is dissolved in the washing water and becomes a washing liquid and penetrates into the clothes. The washing and dewatering tub 34 rotates at a low speed of about 30 to 50 r / min (the rotational speed of the driving means 35 is 300 to 500 r / min), and performs washing for a specified time to lift and drop the clothes. At this rotational speed, no harsh high-frequency sound is generated.

  After the washing is completed, the drainage means 38 is operated, and the washing water in which the dirt is dissolved passes through the flow path 48 from the conduit 50 and is discharged from the drainage means 38 to the outside of the machine while taking heat of the drive means 35. After the drainage is completed, the rotation of the washing and dewatering tub 34 is gradually accelerated and the dehydration process is started. After the dehydration is started, when the rotation speed of the washing / dehydration tub 34 rises to reach the steady rotation speed of 900 r / min, the rotation speed of the drive means 35 is 9000 r / min, and 3 kHz to 4 kHz from the drive means 35. And the noise level of 4 kHz to 8 kHz due to the contact sound between the first pulley 42 and the transmission belt 44 increases.

However, since the driving means 35 and the first pulley 42 are covered with the sound insulating means 46, the noise level in the frequency band can be lowered and the annoying sound can be eliminated.
In addition, the sound insulation means 46 is provided with sound insulation walls 46 a and 46 b on both sides of the drive means 35 in the direction of the rotation shaft 35 a, and one sound insulation wall 46 b is disposed outside the first pulley 42. As a result, the driving sound emitted in the direction of the rotating shaft 35a of the driving means 35 can be reflected inward by the sound insulating wall 46b, and can be effectively insulated by preventing the sound from propagating into the washing machine outer frame 30. .

  Further, since the temperature of the driving unit 35 is easily increased by covering the driving unit 35 with the sound insulating unit 46, the temperature increase can be suppressed by the cooling unit 47.

  As described above, in the present embodiment, the driving sound of the driving means 35 and the high-frequency component of the belt driving sound generated by the first pulley 42 and the transmission belt 44 can be removed, and the harsh sound is eliminated. Can do. In addition, by providing the driving means 35 with the cooling means 47, the two problems of sound insulation and temperature rise suppression can be solved simultaneously.

(Embodiment 2)
FIG. 4 is a cross-sectional view of the washing machine according to the second embodiment of the present invention. The feature of the present embodiment is that the water supply means 36 is constituted by a two-way valve, and the other water path 36 b is connected to a flow path 48 provided on the outer periphery of the drive means 35. Other configurations are the same as those of the first embodiment, and the same reference numerals are given, and the detailed description of the first embodiment is used.

  At the start of washing and rinsing, water is supplied from one water channel 36a into the outer tub 33, and the other water channel 36b is closed. When the driving means 35 is driven, the other water passage 36b is opened, and tap water 49 is allowed to flow through the flow path 48 provided on the outer periphery of the driving means 35, thereby opening the drainage means 38.

According to the above configuration, heat can be radiated from the water supply means 36 to the tap water 49 flowing through the flow path 48 through the water channel 36b, and the temperature rise of the drive means 35 can be suppressed at a low cost with a simple configuration. Moreover, the temperature rise of the drive means 35 can be suppressed also in the drying process which does not use water.

  In addition, the water supply from the water supply means 36 to the flow path 48 can control the water supply amount or / and the water supply time by intermittent water supply according to the heat generation state such as the temperature or the rotational speed of the drive means 35. In this case, the control device 39 controls the water supply means 36 and the drainage means 38, so that the cooling water is not consumed wastefully and can be optimized.

(Embodiment 3)
FIG. 5 is a sectional view of a washing machine according to the third embodiment of the present invention. The feature of the present embodiment is that a circulation pump 51 is provided at the bottom 30a of the washing machine outer frame 30, the downstream side 48a of the flow path 48 and the circulation pump 51 are connected by a pipe line 52, and the discharge part 51a of the circulation pump 51 is It is provided in the upper part 33 b of the outer tub 33. Other configurations are the same as those of the first embodiment, and the same reference numerals are given, and the detailed description of the first embodiment is used.

  According to the above configuration, the washing water in the outer tub 33 can be circulated through the flow path 48 during washing and / or rinsing, and the washing water circulates while removing heat from the driving means 35. The washing water can be heated by the heat of the drive means 35, and the washing effect can be enhanced by raising the temperature of the washing water.

(Embodiment 4)
FIG. 6 is a cross-sectional view of the washing machine according to the fourth embodiment of the present invention. A feature of the present embodiment is that a heat radiating portion 53 that radiates heat of the driving means 35 is formed in the flow path 48. Other configurations are the same as those of the first embodiment, and the same reference numerals are given, and the detailed description of the first embodiment is used.

  According to the above configuration, the heat dissipating part 53 is formed in a fin shape, and the heat exchanging ability is improved by increasing the surface area of the heat dissipating part 53 to effectively dissipate the heat of the driving means 35 to the water in the flow path 48. Thus, the temperature rise of the drive means 35 can be efficiently suppressed.

  As described above, the washing machine according to the present invention can insulate the driving sound of the motor and the driving sound generated by the pulley and belt of the motor and can suppress the heat generation of the driving means. Useful as.

30 Washing machine outer frame 33 Outer tub 34 Washing / dehydration tub 35 Motor (drive means)
42 First pulley 43 Second pulley 44 Transmission belt 45 Transmission means 46 Sound insulation means 47 Cooling means

Claims (6)

An outer tub elastically supported in the outer frame of the washing machine, a washing / dehydrating tub rotatably provided in the outer tub, and a rotation of driving means provided in the outer tub is transmitted to the washing / dehydrating tub. A transmission means, wherein the transmission means rotates the first pulley provided in the drive means, the second pulley provided in the washing and dewatering tub, the first pulley, and the second pulley. A washing machine having a transmission belt that is freely connected, and provided with a cooling means for covering the driving means and the first pulley with a sound insulation means and suppressing a temperature rise of the driving means. The washing machine according to claim 1, wherein the sound insulation means is provided with sound insulation walls on both sides in the rotational axis direction of the drive means, and one sound insulation wall is disposed outside the first pulley. The washing machine according to claim 1 or 2, wherein the cooling means includes a flow path through which cooling water for cooling the drive means flows, and the flow path is provided upstream of the drainage means. The washing machine according to claim 1 or 2, wherein a water supply means for supplying water into the outer tub is provided, and the cooling means connects one of the water supply means to a flow path to flow tap water. The circulating pump which circulates the washing water in an outer tub into the said outer tub through a flow path is provided, and the cooling means cools a drive means with the washing water which flows through the said flow path. The washing machine according to Item 1. The washing machine according to any one of claims 1 to 5, wherein the cooling means includes a heat radiating portion that radiates heat of the driving means in the flow path.