WO2023053857A1

WO2023053857A1 - Washing machine

Info

Publication number: WO2023053857A1
Application number: PCT/JP2022/033341
Authority: WO
Inventors: 拓也上村; 政志高木; 稔樹松原; 泰広川上
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2021-09-28
Filing date: 2022-09-06
Publication date: 2023-04-06
Also published as: JP2023048717A; TW202319613A

Abstract

The washing machine of the present disclosure comprises: a housing; a control unit disposed inside the housing; and a cooling fan for cooling, with cooling wind, a first heat-generating electronic component and a second heat-generating electronic component disposed inside the control unit. The control unit includes a board on which the first heat-generating electronic component and the second heat-generating electronic component are mounted, a first heat-dissipating part for cooling the first heat-generating electronic component, a second heat-dissipating part for cooling the second heat-generating electronic component, and a case storing the board, the first heat-dissipating part, and the second heat-dissipating part. The first heat-dissipating part and second heat-dissipating part, the cooling fan, and an exhaust port of the case are disposed in a straight line. The second heat-dissipating part is disposed on an upstream side of the first heat-dissipating part in the flow direction of the cooling wind. The first heat-dissipating part protrudes with respect to the second heat-dissipating part as viewed from the upstream side in the flow direction.

Description

washing machine

This disclosure relates to washing machines.

In a control unit that controls equipment (for example, inverter control), when electronic components that generate a large amount of heat (hereinafter referred to as heat-generating electronic components) are used, the heat-generating electronic components, etc. It is cooled (see, for example, Patent Literature 1). Although the above Patent Document 1 relates to a device called a refrigerator, a similar cooling structure is also used in a washing machine.

JP-A-6-74640

With the conventional cooling structure, there is the problem that the cooling air from the cooling fan is insufficient to cool the heat-generating electronic components.

The present disclosure provides a washing machine that allows cooling air from a cooling fan to spread over heat-radiating parts and heat-generating electronic components.

A washing machine according to one aspect of the present disclosure includes a housing, a control unit arranged inside the housing, and a first heat-generating electronic component and a second heat-generating electronic component arranged inside the control unit. and a cooling fan for cooling with. The control unit includes a substrate on which the first heat-generating electronic component and the second heat-generating electronic component are mounted, a first heat-radiating section that cools the first heat-generating electronic component, a second heat-radiating section that cools the second heat-generating electronic component, and a case that accommodates the substrate, the first heat radiator, and the second heat radiator. The first heat radiating section, the second heat radiating section, the cooling fan, and the exhaust port of the case are configured to be arranged in a straight line. The second heat radiating portion is configured to be arranged upstream of the first heat radiating portion in the flow direction of the cooling air. The first heat radiation part is configured to protrude with respect to the second heat radiation part when viewed from the upstream side in the flow direction.

The present disclosure can provide a washing machine that allows cooling air from a cooling fan to spread over heat-radiating parts and heat-generating electronic components.

FIG. 1 is a schematic front view showing the configuration of a washing machine according to one embodiment of the present disclosure. 2 is a longitudinal sectional view showing the configuration of the washing machine shown in FIG. 1. FIG. FIG. 3 is a schematic diagram showing the configuration inside the control unit of the washing machine shown in FIG. 4 is a schematic perspective view showing the configuration of the control unit shown in FIG. 3. FIG. FIG. 5 is an enlarged view of a main part seen from the air supply port side, showing the configuration of the control unit shown in FIG. 6 is a perspective view showing the configuration of a first heat radiating section in the control unit shown in FIG. 3. FIG. FIG. 7 is a side view of the configuration of the first heat radiating portion shown in FIG. 6, viewed from the air supply port side. 8 is a perspective view showing a configuration of a second heat radiating section in the control unit shown in FIG. 3. FIG. FIG. 9 is a side view of the structure of the second heat radiating portion shown in FIG. 7, viewed from the air supply port side.

Hereinafter, embodiments of the present disclosure will be described with reference to the attached drawings. In each figure, X-axis, Y-axis and Z-axis which are orthogonal to each other are shown for convenience. In this specification, the width direction, depth direction, and height direction of the washing machine 1 are defined by the X-axis, Y-axis, and Z-axis, respectively. For convenience of explanation, the direction of the washing machine 1 is specified with reference to FIG. 1 in which the washing machine 1 is viewed from the front side. The opposite side of the body 19 is called the rear side (rear side).

(Embodiment)
[overall structure]
FIG. 1 is a schematic front view showing the configuration of a washing machine 1 according to one embodiment of the present disclosure. FIG. 2 is a longitudinal sectional view showing the configuration of washing machine 1 shown in FIG.

As shown in FIG. 1, the washing machine 1 has a housing 25 forming an outer shell. A door 19 is provided on the front side of the housing 25 so that it can be opened and closed. By opening the door 19, laundry can be put in and taken out. An operation panel 20 is provided on the front upper portion of the housing 25 . The operation panel 20 includes a power button, a display operation section, and the like. A control unit 30 is arranged inside the housing 25 at a lower front portion thereof. Details of the control unit 30 will be described later.

As will be described later, a drying device 27 and a dry air circulation device 28 are arranged in the upper part of the inside of the housing 25, so that the upper part of the inside of the housing 25 becomes hot. On the other hand, the lower part inside the housing 25 is relatively low temperature. Therefore, the control unit 30 is arranged in the lower part where the temperature is relatively low inside the housing 25 . As a result, the air in the lower part of the housing 25, which is relatively low in temperature, is sent out as cooling air from the cooling fan 29, so that the temperature of the cooling air can be lowered.

As shown in FIG. 2, the washing machine 1 includes a rotary drum 14, a water heater 21, a power cord 22, a washing water circulation device 23, an outer tub 24, a motor 26, a drying device 27, and a drying air circulation. It comprises a device 28, a control unit 30, and water and drain valves (not shown). The washing machine 1 is, for example, a drum-type washing machine. Power is supplied to various drive devices, drive circuits, and control circuits in the washing machine 1 via a power cord 22 .

Inside the housing 25, an outer tub 24 supported by a suspension structure and a rotating drum 14 rotatably supported within the outer tub 24 are arranged. The outer tub 24 and the rotating drum 14 have bottomed cylindrical shapes. The outer tub 24 and the rotating drum 14 are arranged so as to extend obliquely downward from the front side to the rear side of the housing 25 .

A large number of through holes are provided on the peripheral surface of the rotating drum 14 . The rotating shaft of the rotating drum 14 is rotated by the motor 26, so that the rotating drum 14 rotates in the normal rotation direction or the reverse rotation direction. Rotation of motor 26 is controlled by control unit 30 . A plurality of projecting plates for agitating the laundry are provided on the inner wall surface of the rotating drum 14 . The rotary drum 14 is rotated at a low speed, and the laundry is hooked by the protruding plate, lifted upward, and then dropped at an appropriate height by performing an agitating operation (tumbling operation), thereby performing an agitating, beating and washing operation of the laundry. and drying operation.

The dry air circulation device 28 dries the laundry by circulating the air inside the outer tub 24 and the rotating drum 14 . The rotation of the circulation fan in the dry air circulation device 28 is controlled by the control unit 30 . The air that has been dehydrated from the laundry in the rotating drum 14 and is in a humid state is sent to the drying device 27 through an outer tub exhaust port provided on the upper side of the outer tub 24 . The drying device 27 is, for example, a heat pump device that dehumidifies and heats with a heater or a heat exchanger. Drying device 27 is controlled by control unit 30 .

Water is supplied into the outer tank 24 through a water supply valve (not shown). The water heater 21 warms the water used for washing. The water heater 21 is controlled by a control unit 30 . The washing water circulation device 23 circulates the water inside the rotating drum 14 . A circulation motor of the washing water circulation device 23 is controlled by the control unit 30 . Washing water stored in the outer tub 24 is discharged to the outside through a drain valve (not shown).

[Controller unit]
FIG. 3 is a schematic diagram showing the configuration inside the control unit 30 of the washing machine 1 shown in FIG. FIG. 4 is a schematic perspective view showing the configuration of control unit 30 shown in FIG. FIG. 5 is an enlarged view of a main portion seen from the air supply port 32 side, showing the configuration of the control unit 30 shown in FIG. FIG. 6 is a perspective view showing the configuration of the first heat radiator 35 in the control unit 30 shown in FIG. FIG. 7 is a side view of the configuration of the first heat radiator 35 shown in FIG. 6, viewed from the air supply port 32 side. FIG. 8 is a perspective view showing the configuration of the second heat radiator 36 in the control unit 30 shown in FIG. 3. As shown in FIG. FIG. 9 is a side view of the configuration of the second heat radiating portion 36 shown in FIG. 7, viewed from the air supply port 32 side.

As shown in FIG. 3, the control unit 30 of the washing machine 1 includes a cooling fan 29, a case 31, and a board 34. The cooling fan 29 cools heat-generating electronic components, which are disposed inside the control unit 30 and will be described later, with cooling air. In this embodiment, the cooling fan 29 is described as a configuration of the control unit 30, but it does not have to be included in the configuration of the control unit 30. FIG. That is, the cooling fan 29 may have any configuration as long as it has the configuration of the washing machine 1 . The case 31 has a rectangular box shape, and the main surfaces of the box shape extend in the X-axis direction and the Z-axis direction. The case 31 has a bottom surface 31a, one side surface 31b, an upper surface 31c, another side surface 31d, a rear surface 31e, and a front surface (not shown).

An air supply port 32 is formed on one side surface 31b, and an exhaust port 33 is formed on the other side surface 31d. A cooling fan 29 is arranged outside one side surface 31 b and facing the air supply port 32 . The cooling fan 29 is, for example, an axial fan in which a propeller-type fan is attached to the rotating shaft of a cooling motor. The rotation of cooling fan 29 is controlled by control unit 30 . The case 31 accommodates a substrate 34, a first heat radiating section 35, a second heat radiating section 36, a third heat radiating section 37, and heat-generating electronic components to be described later.

Since heat tends to accumulate inside the case 31, the internal atmosphere of the case 31 tends to be hotter than the external atmosphere of the case 31. Therefore, the cooling fan 29 is arranged outside the case 31 as described above. As a result, the relatively low-temperature air outside the case 31 is sent out as cooling air from the cooling fan 29 and supplied to the inside of the case 31, so that the temperature of the cooling air can be lowered. The cooling fan 29 is installed near the rotating drum 14, the motor 26, and other objects that generate noise during operation. As a result, the wind noise of the cooling fan 29 is mixed with other operating noises and is less likely to reach the user. The cooling fan 29 is arranged away from the side surface of the housing 25 , that is, near the center of the housing 25 in the X-axis direction (width direction). As a result, the washing machine 1 can prevent the user from feeling uncomfortable due to noise such as the wind noise of the cooling fan 29 .

In addition, the control unit 30 includes a first heat dissipation section 35, a second heat dissipation section 36, and a third heat dissipation section 37. Here, the first heat radiation portion 35 and the second heat radiation portion 36, the air supply port 32 (that is, the cooling fan 29) of the case 31, and the air outlet 33 of the case 31 are viewed from the Y-axis direction (depth direction). They are generally arranged linearly along the X-axis. Cooling air from the cooling fan 29 is supplied to the inside of the case 31 through the air supply port 32 , flows along the flow direction F, and is discharged out of the case 31 through the exhaust port 33 . In other words, the flow direction F of the cooling air blown out from the cooling fan 29 is generally linear along the X-axis from the upstream side of the one side surface 31b to the downstream side of the other side surface 31d. Further, as shown in FIG. 3 , the second heat radiation portion 36 is arranged upstream of the first heat radiation portion 35 in the flow direction F of the cooling air. In this disclosure, the term "linear" refers to an area having a certain spread through which the cooling air blown by the cooling fan 29 passes linearly (in FIG. 3, an area including a plurality of arrows F indicating the flow direction F). ) is intended. Further, hereinafter, when descriptions of "upstream side in the flow direction F of the cooling air" and "downstream side in the flow direction F of the cooling air" are omitted and simply described as "upstream side" and "downstream side" There is

The control unit 30 performs inverter control, for example, and rotates, washing, and drying the drive circuit of the motor 26, the drive circuit of the drying device 27, the drive circuit of the dry air circulation device 28, and the cooling fan 29. and a control circuit for controlling the

The substrate 34 extends in the X-axis direction and the Z-axis direction (width direction and height direction), in other words, it is arranged so as to extend in the vertical direction. In this disclosure, the term "vertical" is meant to be vertical, but it also includes those slightly deviated from vertical due to manufacturing errors, fluctuations, and the like. Specifically, vertical means within 90 degrees ± 5 degrees with respect to the horizontal plane, preferably within 90 degrees ± 3 degrees with respect to the horizontal plane, more preferably within 90 degrees ± 1 degree with respect to the horizontal plane . On the surface of the substrate 34, various electronic components constituting the drive circuit and the control circuit, especially electronic components that generate a large amount of heat when a large current flows (hereinafter referred to as heat-generating electronic components) are mounted.

As the first heat-generating electronic component, for example, diode bridges 39 and 39 and a transistor 40 are mounted on the lower downstream side of the substrate 34 . A primary side electrolytic capacitor 44 is mounted below the diode bridges 39 , 39 and the transistor 40 . As the second heat-generating electronic components, for example, a dryer switching IC 41 and a motor switching IC 42 are mounted on the bottom central side of the substrate 34 . As the third heat-generating electronic component, for example, a dry air circulator switching IC 43 is mounted on the upstream side of the lower portion of the substrate 34 .

Therefore, the first heat-generating

electronic components

39, 40, the second heat-generating

electronic components

41, 42, and the third heat-generating electronic component 43, which generate large amounts of heat, are arranged on the lower side of the control unit 30, and as described above, The substrate 34 is arranged so as to extend in the vertical direction. As a result, the heat generated from the heat-generating

electronic components

39, 40, 41, 42, 43 can be released to the upper space of the case 31, so that the heat-generating electronic components can be cooled with relatively low-temperature air.

The third heat-generating electronic component 43, the second heat-generating

electronic components

41, 42, and the first heat-generating

electronic components

39, 40 are controlled by the flow of cooling air from one side surface 31b on the upstream side to the other side surface 31d on the downstream side. They are arranged in series along the direction F, in other words approximately linear along the X-axis.

In the hot water washing process of washing the laundry with hot water, for example, the motor 26, the water heater 21, and the washing water circulation device 23 operate, so the motor switching IC 42 and the diode bridge 39 generate heat.

In the laundry drying process, for example, the motor 26, the drying device 27, and the dry air circulation device 28 operate, so the motor switching IC 42, the dryer switching IC 41, the dry air circulation device switching IC 43, and the diode The bridge 39 generates heat.

As shown in FIGS. 3 and 4, a first heat sink (heat sink) 35 is disposed (mounted) on the substrate 34 so as to be in contact with and thermally connected to the first heat-generating

electronic components

39 and 40 . ) is done. That is, the first heat radiation part 35 cools the first heat-generating

electronic components

39 and 40 . A second heat sink (heat sink) 36 is disposed on the second heat-generating

electronic components

41 and 42 so as to be in contact with and thermally connected to the second heat-generating

electronic components

41 and 42 . That is, the second heat radiation part 36 cools the second heat-generating

electronic components

41 and 42 . A third heat radiation part 37 (heat sink) is arranged on the third heat-generating electronic component 43 so as to be in contact with and thermally connected to the third heat-generating electronic component 43 . That is, the third heat radiation part 37 cools the third heat-generating electronic component 43 . The first heat radiation part 35, the second heat radiation part 36, and the third heat radiation part 37 are made of a material having high thermal conductivity, for example, a metal such as aluminum.

As shown in FIGS. 6 and 7, the first heat radiation part 35 has a first base 35a, first fins 35b, and first mounting pins 35c. The first base 35a is a support portion of the first heat radiating portion 35, and is a portion that abuts on the first heat-generating

electronic components

39 and 40 and takes in the heat generated from the first heat-generating

electronic components

39 and 40. As shown in FIG. The first fin 35b is a portion that protrudes from the first base 35a (that is, extends from the first base 35a), and is a portion that emits heat when exposed to cooling air. The first heat radiation part 35 is mounted on the substrate 34 via the first mounting pins 35c. When the first heat radiating portion 35 is mounted on the substrate 34, the first base 35a extends in the direction intersecting the substrate 34, in other words, in the extending direction of the substrate 34 (X-axis direction and Z-axis direction: width direction and height direction), that is, in the Y-axis direction (depth direction). In this disclosure, the term “perpendicular” is intended to be perpendicular, but it also includes those slightly deviated from perpendicular (that is, the angle with the extending direction of the substrate is 90°) due to manufacturing errors, fluctuations, etc. means. Specifically, "perpendicular" means that the angle with the extending direction of the substrate is within 90°±5°, preferably within 90°±3°, more preferably within 90°±1°.

The first fin 35b is arranged on the side opposite to the first mounting pin 35c on the lower surface side of the first base 35a. The first fin 35b has a plurality of (for example, four) first plate-like portions 35d. The plurality of first plate-shaped portions 35d extend in the X-axis direction and the Z-axis direction (the width direction and the height direction), in other words, along the flow direction F. The plurality of first plate-like portions 35d extend in a direction perpendicular to the direction in which the first base 35a extends from the substrate 34 (for example, the negative direction of the Z axis: downward). In the first heat radiation part 35, the extending direction of the first base 35a and the extending direction of the first fins 35b are perpendicular to each other, so that the washing machine 1 can provide the first heat-generating

electronic components

39, 40 in contact with the first heat-generating

electronic components

39,40. The height of the base 35a can be increased. Thereby, in the first heat radiation part 35, the tall first heat-generating

electronic components

39, 40 can be mounted on the portion of the first base 35a. The plurality of first plate-shaped portions 35d are spaced apart in a direction (Y-axis direction: depth direction) perpendicular to the extending direction of the substrate 34 (X-axis direction and Z-axis direction: width direction and height direction). Thereby, the cooling air flows smoothly along the flow direction F.

For example, the diode bridge 39 is fixed with screws so as to be thermally connected to the upper surface side of the first base 35a. The diode bridge 39 and the transistor 40 are fixed with screws so as to be thermally connected to the bottom surface of the first base 35a.

As shown in FIG. 7, the first heat radiation portion 35 is provided between the substrate 34 side end portion of the first base 35a and the first plate portion 35d of the first fin 35b closest to the substrate 34 side. 1 height A. The first height A substantially corresponds to the height of only the first base 35a without the first fins 35b.

As shown in FIGS. 8 and 9, the second heat radiation part 36 has a second base 36a and second fins 36b. The second base 36a is a support portion of the second heat radiating portion 36, and is a portion that abuts on the second heat-generating

electronic components

41 and 42 and takes in the heat generated from the second heat-generating

electronic components

41 and 42. As shown in FIG. The second fin 36b is a portion that protrudes from the second base 36a (that is, extends from the second base 36a), and is a portion that releases heat when exposed to cooling air. The second heat radiation part 36 is arranged on the second heat-generating

electronic components

41 and 42 mounted on the substrate 34 . When the second heat radiation part 36 is arranged on the second heat-generating

electronic components

41 and 42, the second base 36a extends in a direction intersecting the substrate 34, in other words, in an extending direction of the substrate 34. It extends in a direction orthogonal to (X-axis direction and Z-axis direction: width direction and height direction), that is, in the Y-axis direction (depth direction).

The second fin 36b is arranged on the opposite side of the substrate 34 on the upper surface side of the second base 36a. The second fin 36b has a plurality of (eg, four) second plate-like portions 36d. The plurality of second plate-shaped portions 36d extend in the X-axis direction and the Y-axis direction (the width direction and the depth direction), in other words, along the flow direction F. The plurality of second plate-like portions 36d extend in a direction parallel to the direction in which the second base 36a extends from the substrate 34 (for example, the positive direction of the Y-axis: rearward). The second plate-shaped portion 36 d extending along the flow direction F rectifies the cooling air passing through the second heat radiating portion 36 so that the strong cooling air can reach the first heat radiating portion 35 . As a result, the washing machine 1 rectifies the cooling air in the second heat radiating section 36 and allows the strong cooling air to reach the first heat radiating section 35 . The plurality of second plate-shaped portions 36d are spaced apart in a direction (Z-axis direction: height direction) parallel to the extending direction of the substrate 34 (especially Z-axis direction: height direction). Thereby, the cooling air flows smoothly along the flow direction F.

For example, the dryer switching IC 41 and the motor switching IC 42 are fixed by fixing means such as screws and pins so as to be thermally connected to the lower surface side of the second base 36a.

As shown in FIG. 9, the second heat radiation part 36 has a second height between the end of the second base 36a on the substrate 34 side and the part of the second fin 36b closest to the second base 36a. has a length B. The second height B substantially corresponds to the height of only the second base 36a without the second fins 36b.

The second plate-shaped portions 36d of the second fins 36b are separated by a fin interval S. When the fin interval S is increased, the cooling air sent from the cooling fan 29 can easily pass through the second fins 36b.

Electronic components

39 and 40 can also be effectively cooled. Since the washing machine 1 can be effectively cooled, the size of the first heat radiation part 35 can be reduced, and thus the cost can be reduced.

As shown in FIG. 5, for example, the first heat radiating portion 35 projects in the positive direction (upward) of the Z axis with respect to the second heat radiating portion 36 when viewed from the upstream side in the flow direction F. , and have a portion that does not overlap the second heat radiating portion 36 in the positive direction (upward) of the Z axis. As a result, part of the cooling air sent from the cooling fan 29 reaches the first heat radiating portion 35 without being blocked by the second heat radiating portion 36, so that it reaches the second heat generating

electronic components

41 and 42 on the upstream side. In addition, the first heat-generating

electronic components

39 and 40 on the downstream side can also be effectively cooled.

At least a portion of the first fin 35 b in the Z-axis direction (for example, all of the Z-axis direction portions) of the second heat radiating portion 36 is located on the side of the first base 35 a of the first heat radiating portion 35 . It is configured to be located between the fins 36b (ie between the fin spacings S). As a result, part of the cooling air sent from the cooling fan 29 passes through the second fins 36b of the second heat radiating section 36 and reaches the first fins 35b of the first heat radiating section 35 . Therefore, the washing machine 1 can effectively cool the first heat-generating

electronic components

39 and 40 on the downstream side in addition to the second heat-generating

electronic components

41 and 42 on the upstream side.

In addition, the primary electrolytic capacitor 44 is configured to protrude in the negative direction (downward) of the Z axis with respect to the second heat radiating portion 36 when viewed from the upstream side in the flow direction F. As a result, part of the cooling air sent from the cooling fan 29 reaches the primary side electrolytic capacitor 44 without being blocked by the second heat radiating portion 36, so that it reaches the second heat generating

electronic components

41 and 42 on the upstream side. In addition, the downstream primary electrolytic capacitor 44 can also be effectively cooled.

As shown in FIG. 5, the second height B of the second base 36a is lower than the first height A from the substrate 34 to the first fins 35b. As a result, the cooling air sent from the cooling fan 29 reaches the first fins 35b without being blocked by the second base 36a. The first heat-generating

electronic components

39 and 40 on the side can also be effectively cooled.

As shown in FIG. 3, the third heat-radiating portion 37 is arranged on the third heat-generating electronic component 43 mounted on the substrate 34 . The third heat-generating electronic component 43 is, for example, a dry air circulator switching IC 43 , and is fixed with screws so as to be thermally connected to the lower surface side of the third heat radiating section 37 . The third heat radiation part 37 has a rectangular parallelepiped shape and extends in a direction parallel to the extending direction of the substrate 34 (X-axis direction and Z-axis direction: width direction and height direction). As shown in FIG. 5 , the height of the third heat radiation portion 37 in the Y-axis direction (depth direction) is lower than the second height B of the second base 36 a of the second heat radiation portion 36 . Thereby, the cooling air flows smoothly along the flow direction F.

[effect]
According to washing machine 1 of this embodiment, the following effects can be obtained.

The washing machine 1 includes a housing 25, a control unit 30 arranged inside the housing 25, and first heat-generating

electronic components

39, 40 and a second heat-generating electronic component 41 arranged inside the control unit 30. , 42 with cooling air. The control unit 30 has a substrate 34 on which the first heat-generating

electronic components

39, 40 and the second heat-generating

electronic components

41, 42 are mounted, and a first heat radiation section 35 for cooling the first heat-generating

electronic components

39, 40. . The control unit 30 also has a second heat radiating section 36 that cools the second heat-generating

electronic components

41 and 42 , and a case 31 that houses the board 34 , the first heat radiating section 35 , and the second heat radiating section 36 . The first heat radiation portion 35 and the second heat radiation portion 36, the cooling fan 29, and the exhaust port 33 of the case 31 are arranged in a straight line. The second heat radiating portion 36 is arranged upstream of the first heat radiating portion 35 in the flow direction F of the cooling air. The first heat radiation portion 35 is configured to protrude with respect to the second heat radiation portion 36 when viewed from the upstream side in the flow direction F. As shown in FIG.

With such a configuration, part of the cooling air sent from the cooling fan 29 reaches the first heat radiating section 35 without being blocked by the second heat radiating section 36 . Therefore, the washing machine 1 can effectively cool the first heat-generating

electronic components

39 and 40 on the downstream side in addition to the second heat-generating

electronic components

41 and 42 on the upstream side. Since the washing machine 1 can be effectively cooled, the size of the first heat radiation part 35 can be reduced, and thus the cost can be reduced.

In the washing machine 1 of the present embodiment, the first heat radiation part 35 includes a first base 35a extending in a direction intersecting with the substrate 34, and first fins 35b extending from the first base 35a. ,including. The second heat radiation part 36 includes a second base 36a extending in a direction intersecting the substrate 34 and second fins 36b extending from the second base 36a. A second height B of the second base 36a is lower than a first height A from the substrate 34 to the first fin 35b.

With this configuration, the cooling air sent from the cooling fan 29 reaches the first fins 35b without being blocked by the second base 36a. In addition to 41 and 42, the first heat-generating

electronic components

39 and 40 on the downstream side can also be effectively cooled.

In the washing machine 1 of the present embodiment, the first fins 35b have a plurality of first plate-like portions 35d extending along the flow direction F. The second fin 36b has a plurality of second plate-like portions 36d that extend along the flow direction F and parallel to the direction in which the second base 36a extends from the substrate 34. As shown in FIG.

With such a configuration, the cooling air is rectified in the second heat radiating section 36 , so the washing machine 1 can make the strong cooling air reach the first heat radiating section 35 .

In the washing machine 1 of the present embodiment, the plurality of first plate-like portions 35d of the first fins 35b extend in a direction orthogonal to the direction in which the first base 35a extends from the substrate 34.

With such a configuration, the height of the first base 35a that abuts on the first heat-generating

electronic components

39 and 40 can be increased. 1 heat-generating

electronic components

39 and 40 can be mounted.

In washing machine 1 of the present embodiment, substrate 34 is arranged to extend in the vertical direction. The first heat-generating

electronic components

39 , 40 and the second heat-generating

electronic components

41 , 42 are located below the substrate 34 .

With such a configuration, the washing machine 1 can dissipate the heat generated from the heat-generating

electronic components

39, 40, 41, 42 to the upper space of the case 31, so that the heat-generating

electronic components

39, 39, 42 can be washed with relatively low-temperature air. 40, 41, 42 can be cooled.

In the washing machine 1 of this embodiment, the control unit 30 is positioned below the housing 25 .

With such a configuration, the relatively low-temperature air in the lower part of the housing 25 is sent out from the cooling fan 29 as cooling air, so that the washing machine 1 can lower the temperature of the cooling air.

In washing machine 1 of the present embodiment, cooling fan 29 is arranged outside case 31 .

With such a configuration, the relatively low-temperature air outside the case 31 is sent out from the cooling fan 29 as cooling air, so that the washing machine 1 can lower the temperature of the cooling air.

In the washing machine 1 of the present embodiment, the cooling fan 29 is arranged near the center of the housing 25 in the width direction.

With such a configuration, the washing machine 1 can prevent the user from feeling uncomfortable due to noise such as wind noise of the cooling fan 29 .

A washing machine 1 of another aspect includes a housing 25, a control unit 30 arranged inside the housing 25, and heat-generating

electronic components

39, 40, 41, 42 arranged inside the control unit 30. and a cooling fan 29 for cooling. The control unit 30 has a substrate 34 on which heat-generating

electronic components

39, 40, 41, and 42 are mounted, and a case 31 that accommodates the substrate 34 and the heat-generating

electronic components

39, 40, 41, and . The substrate 34 is arranged so as to extend in the vertical direction. Heat-generating

electronic components

39 , 40 , 41 , 42 are located below substrate 34 .

electronic components

39, 40, 41, 42 to the upper space of the case 31, so that the heat-generating

electronic components

It should be noted that the present disclosure is not limited to the above embodiments, and can be implemented in various other modes.

In the above embodiment, the drum-type washing machine was explained as an example of the washing machine. The washing machine may be any machine as long as it can wash laundry using a liquid agent. Therefore, the washing machine is not limited to a drum-type washing machine, and may be a vertical washing machine or a two-tub washing machine.

The cooling fan may be arranged separately outside the case and near the case. Also, the cooling fan may be arranged inside the case and near one side surface. The air supply port, cooling fan, and exhaust port do not necessarily have to be arranged in a straight line. The cooling fan, the second heat radiating section, the first heat radiating section, and the air outlet need only be arranged along the flow direction of the cooling air, and thus are not limited to a geometrical straight line arrangement.

In the above embodiment, the rectangular parallelepiped case 31 as shown in FIG. 2 has been described as an example of the case. The case is not limited to a rectangular parallelepiped shape as long as it accommodates the substrate and the heat-generating electronic component, or the substrate and the heat radiating portion (the first heat radiating portion and the second heat radiating portion). For example, the case may bulge outward in the vicinity of the location where the heat-generating electronic component and the heat radiating section are arranged. As a result, the washing machine can house the heat radiation part having a height in the case without unnecessarily increasing the size of the control unit as a whole.

In addition, when the heat-generating electronic components and the heat-dissipating portion thermally connected to the heat-generating electronic components are disposed under the control unit (especially the board) as in the above embodiment, the bottom of the case is formed by swelling. may be With such a configuration, the washing machine can accommodate the high heat radiation part in the case without unnecessarily increasing the size of the entire control unit. In the case of a drum-type washing machine, there is a space below the outer tub, that is, the lower part of the housing. can be placed. Furthermore, the lower part of the case may be formed so as to bulge toward the outer tank side. As a result, the control unit can be arranged by effectively utilizing the space formed below the outer tub.

In the above-described embodiment, as an example of the first base, a direction perpendicular to the extending direction of the substrate 34 (X-axis direction and Z-axis direction: width direction and height direction) (Y-axis direction: depth direction) ) has been described. The first base may extend in a direction intersecting the substrate at a predetermined angle. Similarly, the second base may extend in a direction that intersects the substrate at a predetermined angle.

Although the present disclosure has been fully described in connection with preferred embodiments with reference to the accompanying drawings, various variations and modifications will be apparent to those skilled in the art. Such variations and modifications are to be understood as included therein insofar as they do not depart from the scope of the present disclosure by the appended claims.

The present disclosure is applicable to washing machines. Specifically, for example, the present disclosure is useful for drum-type washing machines, vertical washing machines, twin-tub washing machines, and the like.

REFERENCE SIGNS LIST 1 washing machine 14 rotating drum 19 door 20 operation panel 21 water heater 22 power cord 23 washing water circulation device 24 outer tub 25 housing 26 motor 27 drying device 28 dry air circulation device 29... Cooling fan 30... Control unit 31... Case 31a... Bottom surface 31b... One side surface 31c... Top surface 31d... Other side surface 31e... Rear surface 32... Air supply port 33... Exhaust port 34... Board 35... First heat dissipation part (heat dissipation part)
35a... First base 35b... First fin 35c... First mounting pin 35d... First plate-shaped part 36... Second heat dissipation part (heat dissipation part)
36a... Second base 36b... Second fin 36d... Second plate-shaped part 37... Third heat dissipation part 39... Diode bridge (first heat-generating electronic component, heat-generating electronic component)
40... Transistor (first heat-generating electronic component, heat-generating electronic component)
41 Switching IC for dryer (second heat-generating electronic component, heat-generating electronic component)
42 . . . Motor switching IC (second heat-generating electronic component, heat-generating electronic component)
43 ... Switching IC for dry air circulation device (third heat-generating electronic component)
44 Primary side electrolytic capacitor A First height B Second height F Flow direction S Spacing between fins

Claims

a housing;
a control unit disposed inside the housing;
a cooling fan that cools the first heat-generating electronic component and the second heat-generating electronic component disposed inside the control unit with cooling air;
The control unit is
a substrate on which the first heat-generating electronic component and the second heat-generating electronic component are mounted;
a first heat radiator that cools the first heat-generating electronic component;
a second heat radiating part that cools the second heat-generating electronic component;
a case for housing the substrate, the first heat radiation part, and the second heat radiation part;
the first heat radiation part and the second heat radiation part, the cooling fan, and the exhaust port of the case are arranged in a straight line,
the second heat radiating portion is arranged upstream of the first heat radiating portion in a flow direction of the cooling air;
The washing machine, wherein the first heat radiation part is configured to protrude with respect to the second heat radiation part when viewed from the upstream side in the flow direction.
The first heat radiation part includes a first base extending in a direction intersecting the substrate, and a first fin extending from the first base,
The second heat radiation part includes a second base extending in a direction intersecting the substrate, and a second fin extending from the second base,
The washing machine according to claim 1, wherein a second height of said second base is lower than a first height from said substrate to said first fin.
The first fin has a plurality of first plate-shaped portions extending along the flow direction,
3. The second fin has a plurality of second plate-like portions extending along the flow direction and parallel to the direction in which the second base extends from the substrate. washing machine described in .
The washing machine according to claim 3, wherein the plurality of first plate-like portions of the first fins extend in a direction perpendicular to the direction in which the first base extends from the substrate.
The substrate is arranged to extend in a vertical direction,
The washing machine according to any one of claims 1 to 4, wherein the first heat-generating electronic component and the second heat-generating electronic component are positioned below the substrate.
The washing machine according to any one of claims 1 to 5, wherein the control unit is located below the housing.
The washing machine according to any one of claims 1 to 6, wherein the cooling fan is arranged outside the case.
The washing machine according to claim 7, wherein the cooling fan is arranged near the center in the width direction of the housing.
a housing;
a control unit disposed inside the housing;
a cooling fan for cooling heat-generating electronic components arranged inside the control unit;
The control unit is
a substrate on which the heat-generating electronic component is mounted;
a case for housing the substrate and the heat-generating electronic component,
The substrate is arranged to extend in a vertical direction,
The washing machine, wherein the heat-generating electronic component is positioned below the substrate.
A heat radiating portion thermally connected to the heat-generating electronic component is provided at a lower portion of the substrate,
10. The washing machine as set forth in claim 9, wherein the lower portion of the case is bulged.