JP2016049372A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine including a noise shield structure without adding a component to a control device.SOLUTION: Electronic components such as a battery, a battery holder, and a heat sink that are not affected by noise are arranged so as to cover an upper part of a noise influence-receiving electronic component 1 that is mounted on a circuit wiring board 2 of a control device 27 and is likely to be adversely influenced by noise to constitute a noise shield structure. Thus, it is possible to suppress adverse influences on the electronic components by noise without adding a component that may increase manufacturing cost.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a washing machine that performs automatic electronic control of washing, rinsing, and dewatering processes.

  Conventionally, home appliances such as this type of washing machine have been mainly electronic control using a microcomputer, but electronic components used for this electronic control may be affected by noise and cause malfunction. A noise shielding configuration of a control device for preventing malfunction has been proposed (see, for example, Patent Document 1).

  FIG. 6 is a schematic perspective view showing a noise shielding structure of a control device mounted on a conventional washing machine or the like described in Patent Document 1.

  In FIG. 6, by attaching and fixing a metal shield case 40 so as to surround one or a plurality of electronic components (not shown) mounted on the circuit board 31, the electronic components are shielded from noise. ing.

  The shield case 40 has a quadrangular shape surrounded by four substantially rectangular side wall portions 41 to 44. Of the four side wall portions 41 to 44, two side wall portions 41 and 43 that are provided substantially in parallel and face each other have leg portions 45, 46 and 47, 48 extending at both ends of one edge portion, respectively. It is provided. The leg part 45 of the side wall part 41 and the leg part 47 of the side wall part 43 provided on the diagonal line are substantially rectangular. Further, the leg part 46 of the side wall part 41 and the leg part 48 of the side wall part 43 provided on other diagonal lines are substantially L-shaped with the extending ends extending from the side wall parts 41 and 43 bent, The portion 46 and the leg portion 48 are bent in opposite directions.

  In the circuit board 31, four through holes 32 to 35 into which the four legs 45 to 48 of the shield case 40 are inserted are formed around an electronic component that is mounted on the circuit board 31 and performs electromagnetic shielding. The four through holes 32 to 35 are rectangular through holes that are long in the same direction, and are formed in the circuit board 31 according to the positions where the leg portions 45 to 48 of the shield case 40 are provided.

  When the leg portions 45 to 48 of the shield case 40 are respectively inserted into the through holes 32 to 35 from the surface of the circuit board 31, the end portions of the leg portions 45 to 48 protrude from the back surface of the circuit board 31. The locking claw 46 b of the leg portion 46 and the locking claw 48 b of the leg portion 48 abut on the peripheral portions of the through hole 33 and the through hole 35 on the back surface of the circuit board 31 to lock the shield case 40 to the circuit board 31. It is supposed to be.

JP 2008-117908 A

  However, the conventional configuration is effective for noise shielding by using a dedicated shield case, but because of the addition of parts, the manufacturing cost increases due to the increase in the size of the circuit board and the increase in assembly man-hours. There was a problem.

The present invention solves the above-described conventional problems, does not require the addition of components mainly for noise shielding such as a shielding case, and does not increase the manufacturing cost, and has the effect of adversely affecting electronic components due to noise. The present invention provides a washing machine having a noise shielding structure that suppresses mechanically.

  In order to solve the above-described conventional problems, the washing machine of the present invention includes a control device that sequentially controls a series of processes of washing, rinsing, and dewatering by controlling a motor and the like, and the control device is provided on a circuit wiring board. The noise shielding structure is configured by disposing electronic components that are not affected by noise so as to cover the upper part of the noise-affected electronic components that are likely to be adversely affected by the noise mounted on the device.

  As a result, it is possible to suppress an adverse effect on the electronic component due to noise without adding a component that increases the manufacturing cost.

  The washing machine of the present invention can suppress adverse effects on electronic components due to noise without adding components that increase the manufacturing cost.

The longitudinal cross-sectional view of the washing machine in Embodiment 1 of this invention Schematic perspective view showing a noise shielding structure example of the control device of the washing machine Schematic sectional view of an example of the noise shielding structure of the control device Schematic circuit diagram showing noise transmission of the control device Typical sectional drawing which shows the noise shielding structure example of the control apparatus of the washing machine in Embodiment 2 of this invention The typical perspective view which shows the noise shielding structure of the control apparatus mounted in the conventional washing machine etc.

  A first invention includes a control device that controls a motor and the like, and sequentially controls a series of steps of washing, rinsing, and dehydration. The control device is susceptible to adverse effects due to noise mounted on a circuit wiring board. By placing an electronic component that is not affected by noise so as to cover the upper part of the affected electronic component and constructing a noise shielding structure, it is possible to change to an electronic component caused by noise without adding a component that increases the manufacturing cost. The adverse effect of can be suppressed.

  In the second aspect of the invention, in particular, the control device of the first aspect of the invention adds a component that increases the manufacturing cost by adopting a configuration in which the electronic component not affected by the noise of the noise shielding structure is a battery and a battery holder. Without adversely affecting the electronic component due to noise.

  According to the third aspect of the invention, in particular, the control device of the first aspect of the invention is a component that increases the manufacturing cost by adopting a configuration in which the electronic component that is not affected by the noise of the noise shielding structure is a heat sink made of an aluminum plate. Without adding, it is possible to suppress the adverse effect of electronic components on noise.

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

(Embodiment 1)
FIG. 1 shows a longitudinal sectional view of a washing machine according to Embodiment 1 of the present invention.

In FIG. 1, a main body 11 supports a water tank 13 by a plurality of suspensions 12 in a suspension and vibration-proof manner. The washing / dehydrating shaft 14 is hollow and has a biaxial structure. Washing and dewatering tank 15
Has a number of dewatering holes (not shown) on the side wall, a fluid balancer 17 for vibration reduction at the upper part of the inner periphery, and a stirring blade 18 for stirring clothes at the center inner bottom. .

  The transmission mechanism 19 includes a reduction gear (not shown) during washing and a switching clutch (not shown) for the washing / dehydrating shaft 14 and a brake (not shown) for stopping the rotation of the washing / dehydrating tub 15 during dehydration. (Not shown).

  The motor 20 is attached to the bottom of the water tank 13, transmits its power to the washing / dehydrating shaft 14, and rotates the stirring blade 18 and the washing / dehydrating tank 15.

  An upper frame 24 is disposed on the upper portion of the main body 11, and a laundry input / exit 25 for communicating the washing and dewatering tub 15 and the outside is formed at a substantially central portion of the upper frame 24, and the laundry The inlet / outlet port 25 is covered with a lid 26 so as to be freely opened and closed.

  In the front part of the upper frame 24, an operation display unit 28 for performing various input settings and displaying the setting contents is provided. A control device 27 having control means (not shown) for controlling the motor 20 and the like, and sequentially controlling a series of steps of washing, rinsing, and dewatering is arranged inside the operation display unit 28, and the rear side Is provided with a water supply valve 29 that can be opened and closed by electromagnetic force.

  2 is a schematic perspective view showing an example of a noise shielding structure of the control device of the washing machine according to Embodiment 1 of the present invention, FIG. 3 is a cross-sectional view of an example of the noise shielding structure of the control device, and FIG. The schematic circuit diagram which shows the noise transmission of the control apparatus of the same control apparatus is shown.

  In the first embodiment, as an example of the noise shielding structure, a noise shielding structure for an electronic component that is likely to be adversely affected by noise, such as an IC or a crystal resonator used for the current time / calendar setting means, will be described as an example.

  2 and 3, on the circuit wiring board 2 on which various electronic components of the control device 27 are mounted, an IC or a crystal resonator used for current time / calendar setting means which is an electronic component that is easily affected by noise. A noise-affected electronic component 1 such as is disposed.

  A battery 3 and a battery holder 4 that holds the battery 3 are disposed so as to cover the noise-affected electronic component 1 that is an IC or a crystal resonator used for the current time / calendar setting means. One end of the battery holder 4 is a negative electrode 4a, and the other end is a positive electrode 4b.

  That is, a noise shielding structure that shields noise exerted on the noise-affected electronic component 1 by covering the noise-affected electronic component 1 with the battery 3 that is not affected by noise as the noise shielding component and the negative electrode 4a and the positive electrode 4b of the battery holder 4. It has become.

  In FIG. 4, the noise generated from the noise generation source 5 such as an inverter circuit is transferred from the noise generation source to the battery holder 4 by noise transmission 6 by capacitive coupling to the negative electrode 4a and the positive electrode 4b of the battery holder 4 which is a noise shielding component. 4 is transmitted to the negative electrode 4a and the positive electrode 4b, and the noise is transmitted from the negative electrode 4a and the positive electrode 4b of the battery holder 4 to the noise-affected electronic component 1 by noise transmission 7 by capacitive coupling to the noise-affected electronic component 1 or the like. The

  However, since the negative electrode 4a of the battery holder is a low impedance wiring such as GND, and the positive electrode 4b of the battery holder connected by the battery 3 is also a constant voltage source and becomes a low impedance wiring, the transmitted noise is The voltage is divided and effectively suppressed, and the noise-affected electronic component 1 is not affected.

  In addition, although the battery holders 4a and 4b of the noise shielding device in the first embodiment are schematically illustrated by a metal battery welding type, the present invention is not limited to this, but a welding type, a non-welding type, a metal or a resin is used. You may use battery holders made from a product.

  The noise-affected electronic component 1 is not limited to the current time / calendar setting means, and may be a component that is susceptible to noise, such as a microcomputer.

  In addition, the noise generating source 5 is arranged outside the battery 3 that is a noise shielding component, the negative electrode 4a and the positive electrode 4b of the battery holder 4, and the noise-affected electronic component 1 that is desired to perform noise shielding is the battery 3 that is a noise shielding component. The battery holder 4 is disposed inside the negative electrode 4a and the positive electrode 4b, but is not limited thereto. The noise-affected electronic component 1 to be subjected to noise shielding is placed outside the battery 3 as the noise shielding component, the negative electrode 4a and the positive electrode 4b of the battery holder 4, and the noise source 5 is arranged as the battery 3 as the noise shielding component and the battery holder 4 It is also effective for noise shielding to be arranged inside the negative electrode 4a and the positive electrode 4b so as not to leak noise to the outside.

  As described above, in the first embodiment, an electronic component that is not affected by noise so as to cover the upper part of the noise-affected electronic component 1 that is easily affected by noise mounted on the circuit wiring board 2 of the control device 27. By configuring the noise shielding structure, it is possible to suppress an adverse effect on the electronic component due to noise without adding a component that increases the manufacturing cost.

In addition, by adopting a configuration in which the battery 3 and the battery holder 4 are electronic components that are not affected by the noise of the noise shielding structure, the adverse effects of the noise on the electronic components can be suppressed without adding components that increase the manufacturing cost. I can do it.
(Embodiment 2)
FIG. 5 is a schematic cross-sectional view showing an example of a noise shielding structure of the control device for the washing machine in the second embodiment. In addition, since it is the same as Embodiment 1 except a noise shielding structure, description is abbreviate | omitted.

  In FIG. 5, on the circuit wiring board 2 on which various electronic components of the control device 27 are mounted, an IC such as a current time / calendar setting means or a crystal resonator used as an electronic component that is easily affected by noise is covered. A noise-influencing electronic component 1 is provided.

  Then, a U-shaped heat radiating plate made of an aluminum plate to which various electronic components 9 and 10 are attached so as to cover the noise-affected electronic component 1 which is an IC or a crystal resonator used for the current time / calendar setting means. 8 is arranged. The heat sink 8 is connected to a low impedance wiring such as GND (not shown).

  That is, the noise affected electronic component 1 is covered with the heat radiating plate 8 to which various electronic components 9 and 10 are attached as a noise shielding component, thereby providing a noise shielding structure for shielding noise exerted on the noise affected electronic component 1. ing.

  The noise-affected electronic component 1 is not limited to the current time / calendar setting means, and may be a component that is easily affected by noise, such as a microcomputer.

  Moreover, although the heat sink 8 is described in the schematic diagram as a U-shape, the shape is not limited thereto. L-shape and surrounding shape are also effective for noise shielding.

As described above, in the second embodiment, a component that increases the manufacturing cost is added by adopting a configuration in which the electronic component that is not affected by the noise of the noise shielding structure is the heat radiating plate 8 made of an aluminum plate. Without adversely affecting the electronic components due to noise.

  As described above, the washing machine according to the present invention can suppress adverse effects on electronic parts due to noise without adding parts that increase the manufacturing cost. It can be applied to household appliances such as

DESCRIPTION OF SYMBOLS 1 Noise affected electronic component 2 Circuit wiring board 3 Battery 4 Battery holder 8 Heat sink 11 Main body 13 Water tank 15 Washing and dewatering tank 18 Stirring blade 20 Motor 24 Upper frame 27 Control device

Claims (3)

A control device that controls a motor, etc., and sequentially controls a series of steps of washing, rinsing, and dehydration, and the control device covers the upper part of the noise-affected electronic component that is easily affected by noise mounted on the circuit wiring board. A washing machine having a noise shielding structure in which electronic parts that are not affected by noise are arranged so as to cover. The washing machine according to claim 1, wherein the control device uses a battery and a battery holder as electronic parts that are not affected by noise of a noise shielding structure. The washing machine according to claim 1, wherein the control device uses an electronic component that is not affected by noise of the noise shielding structure as a heat radiating plate made of an aluminum plate material.

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