CN112424414A

CN112424414A - Washing machine

Info

Publication number: CN112424414A
Application number: CN201980047321.8A
Authority: CN
Inventors: 德崎雅朗
Original assignee: Panasonic Intellectual Property Management Co Ltd
Current assignee: Panasonic Intellectual Property Management Co Ltd
Priority date: 2018-09-12
Filing date: 2019-08-07
Publication date: 2021-02-26
Anticipated expiration: 2039-08-07
Also published as: WO2020054277A1; TWI825143B; SG11202013182TA; PH12021550095A1; CN112424414B; TW202012732A; JP2020039656A

Abstract

The washing machine of the present disclosure includes: a housing; an accommodating part (24b) provided in the housing; and a control device (50) which is arranged on the accommodating part (24b) and is configured to execute washing operation including washing, rinsing and dewatering. The control device (50) is provided with a substrate (71) on which an electrical component (72) is disposed, a heat dissipation part (73) provided so as to be in contact with the electrical component (72), and a cover (76) provided so as to cover the substrate (71). An opening (76a) is provided on the surface of the cover (76) that faces the heat dissipation section (73). At least a part of the heat dissipation portion (73) extends from the electric component (72) so as to penetrate the cover (76) through the opening (76 a).

Description

Washing machine

Technical Field

The present disclosure relates to a washing machine having a control device.

Background

Fig. 6 shows an electronic circuit board device 200 provided in the conventional washing machine described in patent document 1.

As shown in fig. 6, the conventional washing machine includes an electronic circuit board device 200, and the electronic circuit board device 200 controls power supply and operation of an electric component such as a motor. The electronic circuit board device 200 includes a mounting substrate 100 provided with an actuator module 102 and an electronic component 103, a heat sink 104 mounted to the actuator module 102, and a circuit box 106 accommodating the mounting substrate 100 and the heat sink 104.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2000-252663

Disclosure of Invention

However, in the conventional configuration, when the actuator block 102 mounted on the mounting board 100 generates heat, air heated by the heat generation of the actuator block 102 remains in the circuit box 106. Thereby, the mounting substrate 100 becomes high temperature. Thus, a failure, malfunction, or the like of the execution module 102, the electronic component 103, or the like may be caused.

The present disclosure provides a washing machine which suppresses malfunction, and the like of a control device by releasing heat generated in the control device to the outside.

The washing machine of the present disclosure includes: a housing; an accommodating part arranged on the casing; and a control device configured to execute a washing operation including washing, rinsing, and dewatering, the control device being disposed in the housing portion. The control device includes a substrate on which an electrical component is disposed, a heat dissipation portion provided so as to be in contact with the electrical component, and a cover disposed so as to cover the substrate. An opening is provided on a surface of the cover facing the heat dissipation portion. At least a part of the heat dissipation portion extends from the electrical component so as to penetrate the cover through the opening.

The washing machine of the present disclosure can release heat generated within the control device to the outside. Therefore, it is possible to suppress a failure, malfunction, or the like of the control device caused by the retention of the heated air.

Drawings

Fig. 1 is a longitudinal sectional view of a washing machine according to embodiment 1.

Fig. 2 is an exploded perspective view of a main part of a control device of a washing machine according to embodiment 1.

Fig. 3 is a main part sectional view of the rear part of the upper frame of the washing machine according to embodiment 1.

Fig. 4 is a rear external view of the control unit of the washing machine according to embodiment 1.

Fig. 5 is a schematic view showing the flow of air heated by heat discharge of the control unit of the washing machine according to embodiment 1.

Fig. 6 is a sectional view of a conventional washing machine.

Detailed Description

Hereinafter, the embodiments will be described in detail with reference to the accompanying drawings as appropriate. However, a detailed description thereof will be omitted in some cases. For example, detailed descriptions of widely known items and repetitive descriptions of substantially the same structure may be omitted. This is to avoid unnecessarily obscuring the following description, as will be readily understood by those skilled in the art.

In addition, the drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter recited in the claims by these contents.

The drawings are schematic and not necessarily strictly illustrated. In the drawings, substantially the same components are denoted by the same reference numerals, and description thereof may be omitted or simplified.

(embodiment mode)

In embodiment 1, a vertical washing machine will be described as an example of a washing machine.

Fig. 1 is a longitudinal sectional view of the washing machine of the present embodiment. Fig. 2 is an exploded perspective view of a main part of the control device of the washing machine according to the present embodiment. Fig. 3 is a main part sectional view of the rear part of the upper frame of the washing machine of the present embodiment. Fig. 4 is a rear external view of the control unit of the washing machine according to the present embodiment. Fig. 5 is a schematic diagram showing the flow of air heated by heat discharge from the control unit of the washing machine according to the present embodiment.

As shown in fig. 1, the washing machine 10 has a water tank 13 inside a cabinet 11. The water tank 13 is formed in a bottomed cylindrical shape. The water tank 13 is supported by the housing 11 in a vibration-proof manner by the suspension portion 12.

The washing tub 15 is formed in a bottomed cylindrical shape, and is rotatably disposed inside the water tank 13. The washing tub 15 is formed with a plurality of water passage holes 16 in a side wall thereof, and the washing tub 15 functions not only as a washing tub but also as a dehydrating tub. A fluid balancer 17 is disposed above the washing tub 15. The fluid balancer 17 suppresses abnormal vibration of the water tank 13 occurring due to the offset of the laundry in the washing tub 15.

The pulsator 18 is rotatably disposed at the central bottom of the washing tub 15.

The rotary shaft 14 is disposed to penetrate the bottom surface of the washing tub 15. A pulsator 18 is installed at an upper end of the rotary shaft 14. A transmission mechanism 19 is attached to the lower end of the rotary shaft 14. The rotary shaft 14 is hollow and has a biaxial structure. The rotation shaft 14 can rotate the washing tub 15 and the pulsator 18 or only the pulsator 18. The transmission mechanism 19 includes a reduction gear (not shown), a clutch (not shown), and a brake (not shown).

The motor 20 is installed at the bottom of the water tub 13.

The motor 20 has a motor-side pulley 21. The transmission mechanism 19 has a machine-side pulley 22. The belt 23 is hung between the motor-side pulley 21 and the machine-side pulley 22. Thereby, the rotational driving force of the motor 20 is transmitted in order of the motor-side pulley 21, the transmission belt 23, the machine-side pulley 22, and the transmission mechanism 19, and the rotary shaft 14 is rotated.

An upper frame 24 is provided on the upper portion of the housing 11. The upper housing 24 has a laundry inlet 24a as an opening. The laundry inlet 24a is openably and closably covered by a cover 25. The user can put laundry into the washing tub 15 through the laundry inlet 24a or take laundry out of the washing tub 15 by lifting the lid 25 upward to be opened.

As shown in fig. 2, a concave housing portion 24b is formed at the rear portion of the upper frame 24. A control device 50 is disposed above the housing portion 24 b.

The control device 50 of the present embodiment includes an operation display unit 60 disposed above and a control unit 70 disposed below the operation display unit 60. The operation display unit 60 transmits a washing instruction or the like input by the user to the control unit 70. Further, the operation display unit 60 displays the washing operation status. The control unit 70 controls an electric unit such as the motor 20 to perform a series of washing operations such as washing, rinsing, and spin-drying.

Next, a detailed configuration of the operation display unit 60 will be described.

The operation display unit 60 includes an operation display panel 61, operation buttons 62, and an operation substrate 63.

As shown in fig. 2 and 3, the operation display panel 61 is formed of resin into a sheet shape, and is printed with various selection button marks. A liquid crystal section (not shown) and operation buttons 62 are disposed below the operation display panel 61. The liquid crystal part displays various numbers indicating the remaining washing time and the like. The operation button 62 transmits downward a force of pressing the operation display panel 61 by the user. When the user presses down the operation display panel 61, the operation buttons 62 give the user a feeling of button operation. The operation board 63 disposed below the operation buttons 62 converts the force transmitted from the operation buttons 62 into an electric signal and transmits the electric signal to the controller 70.

Next, a detailed configuration of the control device 50 will be described.

The control unit 70 includes a power supply board 71, a heat dissipation plate 73, a boat 74, and a metal cover 76. As shown in fig. 2 and 3, the boat 74 holds the operation substrate 63 on the upper surface and the power supply substrate 71 on the lower surface. The boat case 74 is formed of flame retardant resin. An insulating nonflammable material sheet 75 is provided between the boat 74 and the power supply substrate 71.

On the lower surface of the power supply board 71, electrical components 72 such as a connector (not shown) for receiving a signal from the operation board and an actuator module are disposed. The electric component 72 is provided with a heat sink 73 made of aluminum. Further, a sealing agent (not shown) made of a urethane resin is filled so as to cover the entire (including substantially the entire) power supply board 71. This suppresses the occurrence of a failure in the power supply board 71 due to water.

As shown in fig. 4 and 5, the metal cover 76 is provided so as to cover the lower side of the power supply substrate 71. The metal cover 76 has an opening 76a through which at least a part of the heat dissipation plate 73 penetrates. The opening 76a is formed larger than the heat dissipation plate 73.

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

First, the basic operation of the washing operation will be described.

The user puts the laundry into the washing tub 15 with the lid 25 opened, and puts the detergent and the softener into a predetermined place. After that, the user inputs an instruction related to the washing operation through the operation display unit 60. Thereby, the control unit 70 starts the washing operation and performs the washing process.

In the washing process, the control part 70 drives the motor 20 after opening the water supply valve 37 to supply water to a predetermined water level. At this time, the driving force of the motor 20 is transmitted to the pulsator 18 via the rotary shaft 14, and a stirring operation for stirring the laundry by the rotation of the pulsator 18 is performed. After the stirring operation is performed for a predetermined time, the controller 70 opens a drain valve (not shown) to discharge the dirty cleaning solution.

Subsequently, the spin-drying operation of rotating the washing tub 15 at a high speed is started. When the dehydration operation is started, the control unit 70 switches the clutch of the transmission mechanism 19 to the dehydration side. Thereby, the rotational driving force of the motor 20 is transmitted to the washing tub 15 via the rotary shaft 14, and the washing tub 15 is rotated. Thereby, the moisture is separated from the laundry by the centrifugal force, and the dehydration is performed. When the dehydration operation is completed, the washing step is completed.

Next, the rinsing process is started. At the start of the rinsing process, the drain valve is closed, the water supply valve 37 is opened, and tap water is supplied into the washing tub 15. In the rinsing step, the water in the washing tub 15 is discharged after the agitation operation by the rotation of the pulsator 18.

Subsequently, the dehydration step is started. In the dehydration step, a dehydration operation is also performed in which the washing drum 15 is rotated at a high speed to remove moisture from the laundry. When the dehydration operation is completed, all the steps are completed, and the washing operation is completed.

Next, the operation of the control unit 70 during the washing operation will be described with reference to fig. 5.

When the motor 20 is driven, the control unit 70 causes a current to flow to the motor 20 via the electric components on the power supply board 71. Since a large current is required for driving the motor 20, a large current also flows to the electric component 72. This generates joule heat in the electric component 72. The generated heat is conducted to the heat dissipation plate 73 in contact with the electric component 72 and dissipated to the ambient air.

At this time, the portion of the heat dissipation plate 73 exposed to the outside of the metal cover 76 is effectively cooled by the air outside the metal cover 76, which is at a relatively lower temperature than the inside of the metal cover 76. As shown by arrow a in fig. 5, the heated air rises in the cabinet 11 and moves from the accommodating portion 24b to the rear of the operation display panel 61.

A 3 rd rib 61b, a 2 nd rib 61a formed at a position rearward of the 3 rd rib, and a 1 st rib 24c provided between the 2 nd rib 61a and the 3 rd rib 61b and formed to extend from the upper housing 24 are arranged at the rear portion of the operation display panel 61. The 3 rd rib 61b is provided with the 1 st opening 61 c. A 2 nd opening 61d is provided behind the operation display panel 61 at a position lower than the 1 st opening 61 c. The heated air is discharged to the outside of the cabinet 11 through the 2 nd opening 61d and the 1 st opening 61 c.

When a large current flows through the electric component 72, the portion of the heat dissipation plate 73 accommodated inside the metal cover 76 heats the air inside the metal cover 76 as indicated by an arrow B in fig. 5. However, since the heated air has a diffusing property, the heated air is mixed with the air outside the metal cover 76 through the opening 76a as shown by an arrow C in fig. 5 and is discharged to the outside of the cabinet 11. Further, a part of the heat is conducted to the air outside the metal cover 76 via the metal cover 76.

Next, the operation of the present embodiment will be described.

At least a part of the heat dissipation plate 73 of the present embodiment is exposed to the outside of the metal cover 76 through the opening 76 a. Therefore, at least a part of the heat dissipation plate 73 is directly exposed to the outside cold air, and thus the heat dissipation efficiency is high. Further, the heat sink 73 can be made larger than the structure in which the entire heat sink 73 is housed inside the metal cover 76. Therefore, further improvement in heat dissipation efficiency can be expected.

The opening 76a of the present embodiment is formed larger than the heat dissipation plate 73. Therefore, since there is a gap between the wall surface of the opening 76a and the heat dissipation plate 73, the air inside the metal cover 76 is mixed with the air outside.

The 2 nd opening 61d provided in the operation display panel 61 of the present embodiment is located above the 1 st opening 61c provided in the 2 nd rib 61 a. Thereby, water is inhibited from entering from the outside of the cabinet 11. Thus, safety is improved.

As described above, in the present embodiment, the washing machine includes the cabinet 11, the storage portion 24b provided in the cabinet 11, and the control portion 70 disposed in the storage portion 24b and configured to perform a washing operation including washing, rinsing, and spin-drying. The control unit 70 includes a power supply board 71 on which an electrical component 72 is disposed, a heat sink 73 provided so as to be in contact with the electrical component 72, and a metal cover 76 disposed so as to cover the heat sink 73. An opening 76a is provided in a surface of the metal cover 76 facing the heat dissipation plate 73. At least a part of heat sink 73 extends from electric component 72 so as to penetrate metal cover 76 through opening 76 a.

Thus, the heat dissipation plate 73 is exposed to the outside of the metal cover 76, and therefore, heat generated in the control device 50 is efficiently released to the outside of the metal cover 76. Therefore, it is possible to suppress a failure, malfunction, or the like of the control device 50 that occurs due to the heated air staying in the metal cover 76.

The metal cover 76 may be made of metal.

This can expect a heat radiation effect via the metal cover 76 by utilizing the thermal conductivity of the metal. Thus, the heat dissipation efficiency of the heat dissipation portion is increased.

The control device 50 may also have an operation display unit 60. The power supply board 71 may be provided below the operation display unit 60. The metal cover 76 may be provided so as to cover the power supply substrate 71 from below the operation display unit 60.

This enables the control device 50 to be compactly provided.

The accommodating portion 24b may be provided above the housing 11 and behind the housing 11. The housing 11 may be provided with at least one of the 1 st opening 61c and the 2 nd opening 61d located behind the accommodating portion 24 b.

This can be expected to further increase the heat dissipation efficiency.

At least one of the 1 st opening 61c and the 2 nd opening 61d may be provided above the opening 76 a.

This can be expected to further increase the heat dissipation efficiency.

(other embodiments)

As described above, embodiment 1 has been described as an example of the technique disclosed in the present application. However, the technique of the present disclosure is not limited to this, and can be applied to embodiments in which changes, substitutions, additions, omissions, and the like are made.

Therefore, other embodiments are exemplified below.

In embodiment 1, a vertical washing machine is described as an example of the washing machine 10. The washing machine 10 is only required to be capable of washing the fabric. Therefore, the washing machine 10 is not limited to the vertical type washing machine, and may be a drum type washing machine, a dual-tub type washing machine, or the like.

In embodiment 1, the control device 50 including the operation display unit 60 and the control unit 70 is described as an example of the control device 50. The control device 50 may include a power supply board 71 on which the electrical component 72 is disposed, a heat sink 73 that is in contact with the electrical component 72, and a metal cover 76 that is disposed so as to cover the surface of the power supply board 71 on which the electrical component 72 is disposed. Therefore, the control device 50 may not include the operation display unit 60, or the control unit 70 and the operation display unit 60 may be disposed at different positions. Therefore, the control device 50 may be provided behind the cabinet 11 or below the cabinet 11, instead of being provided above the cabinet 11.

In embodiment 1, the power supply substrate 71 and the metal cover 76 stacked in the vertical direction are described. The metal cover 76 may be provided so as to cover the surface of the power supply board 71 on which the electrical component 72 is disposed. Therefore, the power supply substrate 71 and the metal cover 76 may be disposed in the vertical direction or in the horizontal direction.

In embodiment 1, the opening 76a is described as an example of the opening. The opening 76a may be provided on a surface facing the power supply board 71 on which the electrical component 72 is disposed, and thus may be provided in the vertical direction or in the horizontal direction.

In embodiment 1, the metal cover 76 is described as an example of a cover disposed so as to cover the surface of the power supply board 71 on which the electrical component 72 is disposed. The metal cover 76 is not limited to metal as long as it has an opening 76a on the surface facing the power supply substrate 71. Therefore, the metal cover 76 may be a cover made of resin, ceramic material, or the like. However, by forming the cover from metal, the thermal conductivity, fire resistance, and durability of the cover can be improved.

Industrial applicability

The present disclosure can be applied to a washing machine provided with a control device. Specifically, the present disclosure can be applied to a vertical type washing machine, a drum type washing machine, a dual-tub type washing machine, or the like.

Description of the reference numerals

10. A washing machine; 11. a housing; 12. a hanging part; 13. a water tank; 14. a rotating shaft; 15. a washing drum; 16. a water through hole; 17. a fluid balancer; 18. an impeller; 19. a transfer mechanism; 20. a motor; 21. a motor-side pulley; 22. a mechanical side pulley; 23. a transmission belt; 24. an upper frame body; 24a, a laundry inlet; 24b, an accommodating portion; 24c, the 1 st reinforcing rib; 25. a cover body; 37. a water supply valve; 50. a control device; 60. an operation display unit; 61. an operation display panel; 61a, the 2 nd reinforcing rib; 61b, the 3 rd reinforcing rib; 61c, the 1 st opening (accommodating portion opening); 61d, the 2 nd opening (accommodating portion opening); 62. an operation button; 63. an operation substrate; 70. a control unit; 71. a power supply substrate (substrate); 72. an electrical component; 73. a heat dissipation plate (heat dissipation portion); 74. a boat-shaped box; 75. an insulating non-combustible material sheet; 76. a metal cover (cover); 76a, an opening part; 100. a mounting substrate; 102. an execution module; 103. an electronic component; 104. a heat dissipation plate; 106. a circuit box; 200. an electronic circuit board device.

Claims

1. A washing machine, wherein,

the washing machine includes:

a housing;

an accommodating part provided in the housing; and

a control device disposed in the accommodating part and configured to execute washing operation including washing, rinsing and dewatering,

the control device includes a substrate on which an electric component is disposed, a heat dissipation portion provided so as to be in contact with the electric component, and a cover disposed so as to cover the substrate,

an opening is provided on a surface of the cover facing the heat radiating portion,

at least a part of the heat dissipation portion extends from the electrical component so as to penetrate the cover through the opening.

2. The washing machine according to claim 1, wherein,

the cover is made of metal.

3. The washing machine according to claim 1 or 2,

the control device is also provided with an operation display part,

the substrate is arranged below the operation display part,

the cover is provided so as to cover the substrate from below the operation display unit.

4. The washing machine according to any one of claims 1 to 3,

the accommodating part is arranged above the machine shell and behind the machine shell,

the housing is provided with a housing opening located behind the housing.

5. The washing machine according to claim 4,

the accommodating portion opening is provided above the opening.