JP3286019B2 - Fully automatic washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fully automatic washing machine for automatically performing a series of washing operations such as washing, rinsing and dehydration.

[0002]

2. Description of the Related Art As shown in FIG. 4, a washing tub 103 is suspended by a hanging rod 102 in an outer frame 101, and a basket 104 and a stirring body 1 are suspended in the washing tub 103.
05 is rotatably arranged. The washing tub 103 is an outer tub for storing water, and is supplied with water from a water supply hose 106 via a water supply valve 107 and is drained from a drain valve 108 by a drain hose 109. The water supply valve 107 and the drain valve 108
Is driven by an electric mechanism such as a motor or a magnet. The basket 104 is an inner tub serving as a dehydration tub,
The stirrer 105 is a stirring blade that generates a water flow. The rotating shafts of both are arranged concentrically, extend outward through the bottom wall of the washing tub 103, and are connected to the clutch mechanism 110.

[0003] The clutch mechanism 110 is fixed to a metal center base 112 together with a motor 111, and attached to the outside of the bottom of the washing tub 103 via the center base 112. A cooling fan (not shown) is attached to the rotation shaft of the motor 111, and the rotation of the rotation shaft is controlled by a pulley 1
The transmission is transmitted to the input shaft of the clutch mechanism 110 at a predetermined speed reduction ratio by the belts 115, 113, 114 and drives the basket 104 and the agitator 105.

The upper portion of the outer frame 101 has a top cover 11
6, and a controller 117 for controlling the water supply valve 107, the drain valve 108, the clutch mechanism 110, the motor 111, etc., is mounted inside the top cover 116. An operation unit and a display unit are provided on the top cover 116.

[0005] In such a fully automatic washing machine, if the rotational speed of the motor 111 can be finely controlled at a multi-stage (stepless) level, it is desirable that the motor 111 be an inverter drive motor. It is necessary to add an appropriate motor drive inverter and its control circuit to the controller 117. The motor drive inverter and its control circuit will be housed in the controller 117, but the number of circuit elements will increase and the controller 117 will increase in size, and the amount of heat generated will also increase, necessitating measures to enhance the cooling effect. Top cover 11 for
It becomes difficult to simply arrange them inside 6.

[0006]

[0007] The installation of a controller in this type of washing machine is described in JP-A-4-53593 and JP-A-4-54999.

[0008]

In the fully automatic washing machine constructed as described above, if all the controllers are mounted on the top cover, the size of the top cover becomes large. In addition, there is a problem that the structure is complicated because it is necessary to enhance the cooling effect. In addition, there is a problem that the wiring distance between the controller and the motor becomes longer and the radiation of high-frequency noise increases.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to prevent a full-automatic washing machine from increasing in size by installing a controller that increases in size so as to effectively utilize the space in the fully-automatic washing machine and to reduce the wiring distance. Another object of the present invention is to reduce the size of the controller by reducing the radiation of high-frequency noise and increasing the cooling efficiency of circuit elements constituting the controller.

[0010]

According to the present invention, a stirrer and a basket are rotatably arranged in a washing tub, and the stirrer and the basket are driven by a motor to perform a series of washing operations such as washing, rinsing, and dehydration. Top cover of the main controller that controls the operation unit in a fully automatic washing machine that automatically operates
And an inverter circuit to control the operation of the motor, etc.
An auxiliary controller to be placed below the washing tub
The master controller performs washing in accordance with the input from the operation unit.
A control signal for controlling the operation is generated to generate the auxiliary control signal.
Characterized by providing in La, specifically, the auxiliary con <br/> controller disposed integrally with the bottom outside of the washing tub, or to support the motor to the bottom outside of the washing tub Center It is characterized in that it is arranged integrally with the base, and that the circuit element of the auxiliary controller that generates a large amount of heat is arranged close to the center base.

[0011]

[0012]

[Function] The top controller that controls the operation unit is top cover.
And an inverter circuit that controls the operation of the motor, etc.
The auxiliary controller having had disposed in a space formed below the washing tub, the controller will not be a washing machine increases in size even larger. Further, since the space is installed motor to close the wiring distance between the auxiliary drive and the motor is shortened, therefore, the radiation of high-frequency noise even if the current supply including a high frequency component to the motor from the auxiliary controller To reduce.

Further, the center base located in the space
When the auxiliary controller is installed, the center base can be used as a heat radiating member, and the cooling effect of the circuit element that generates a large amount of heat can be enhanced to reduce the size of the auxiliary controller.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Note that the entire configuration excluding the installation configuration of the controller is common to that of the above-described conventional fully automatic washing machine, and thus the description thereof is omitted. Also, the same components as those of the conventional fully automatic washing machine are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 is a perspective view showing a washing tub of a fully automatic washing machine according to the present invention in a state where the washing tub is in a prone state, and showing an outer bottom portion thereof. Reference numeral 1 denotes a controller cover which covers an auxiliary controller attached to the center base 2. The motor 3 is an inverter drive motor, and the auxiliary controller includes an inverter circuit for driving the motor 3, a clutch mechanism drive circuit, and a water supply / drain valve drive circuit. The main controller 117 similar to the conventional main controller 117 for controlling the operation unit and the display unit provided on the top cover 116 is installed in the top cover 116 as in the conventional case.

The center base 2 is modified to have a shape in which the mounting positions can be secured so that the auxiliary controller is mounted and covered with the controller cover 1. The illustrated shape of this embodiment is one example, and various other shapes are conceivable. A packing is interposed between the controller cover 1 and the center base 2 so that water does not enter the controller cover 1, and the joint surface thereof has a sufficient waterproof structure. The controller cover 1 is made of a metal plate to protect the power electrolytic capacitor, which is a component of the auxiliary controller, and to reduce radiation of high-frequency noise. The auxiliary controller is connected to the motor 3, the clutch mechanism 110, the water supply valve 107, the drain valve 108, and the like by a lead 4 that extends through the controller cover 1.

FIG. 2 is a perspective view showing an attached state of the auxiliary controller 5 in the controller cover 1, and FIG. 3 is a vertical side view of the auxiliary controller 5.

The auxiliary controller 5 in this embodiment includes a power rectifier 6 constituting a main circuit of an inverter circuit, a power electrolytic capacitor 7 for smoothing a pulsating voltage obtained by rectification, and a power transistor for generating a motor drive voltage. The power semiconductor switching element 8, the drive circuit element for driving the clutch mechanism 110 and the water supply / drain valves 107 and 108, the control power transformer 9 and the control signal processing circuit are installed. A main body control processing circuit for generating a control signal for controlling a washing operation in response to an input from the operation unit and supplying the control signal to the auxiliary controller 5 and controlling a display unit for displaying a state is provided in the main controller 117. .

The auxiliary controller 5 installs a circuit board 12 on which the circuit elements are mounted in a plastic substrate case 11 having a bottom formed by applying a metal plate 10, filling the resin 13 and covering them. This is a configuration in which the moisture resistance is improved. The power rectifier 6 and the semiconductor switching element 8 which generate a large amount of heat and constitute the main circuit of the inverter circuit are arranged so as to be in contact with the metal plate 10 and the metal plate 1
The cooling effect is enhanced by attaching the center 0 to the center base 2 having a large heat radiation area. In this embodiment, the entire bottom of the board case 11 is
However, the metal plate 10 is limited to a part of a region where a circuit element having a large amount of heat such as the rectifier 6 and the semiconductor switching element 8 is brought into contact, and the other region is integrated with the substrate case 11. May be formed.

The fully automatic washing machine configured as described above is
Since the auxiliary controller 5 having an inverter circuit for driving the motor, which causes an increase in size, is mounted on the center base 2 located outside the bottom of the washing tub 103 and is installed by utilizing the space of the section. The size of the automatic washing machine can be prevented from increasing. In addition, the power rectifier 6 and the semiconductor switching element 8 constituting the main circuit of the inverter circuit
By using the center base 2 to dissipate the heat, the cooling efficiency is increased, so that a new large heat dissipating member is not required, and the size of the auxiliary controller 5 is reduced.

Further, since the auxiliary controller 5 is located near the motor 3, the conducting wire 4 through which a current containing a high-frequency component flows.
And the emission of high frequency noise is reduced.

The drive circuit for the clutch mechanism and the supply / drain valve which consume relatively little power are provided by the main controller 117.
Ki out to obtain the same effect be stored in <br/> Ru. A washing tub 103 in which the auxiliary controller 5 is installed
Since there is a relatively large space around the motor 3 and the clutch mechanism 110 on the bottom outside, even if the auxiliary controller 5 is provided with a heat radiating member and is directly attached to the washing tub 103, the size of the fully automatic washing machine increases. Can be prevented.

[0023]

As described above, according to the present invention, the controller
Main control to control the operation unit, motor operation, etc.
Auxiliary controller with an inverter circuit to control
The main controller on the top cover,
Having arranged the rollers on the lower side of the space of the washing tub, the controller will not be a washing machine increases in size even larger. Further, since the space is installed motor to close the wiring distance between the auxiliary <br/> controller and the motor is shortened, therefore, even if the current supply including a high frequency component to the motor from the auxiliary controller RF Noise emission can be reduced.

Further, the center base located in the space
When the auxiliary controller is installed, the center base can be used as a heat radiating member, and the cooling effect of the power circuit elements constituting the main circuit of the inverter circuit can be enhanced, thereby reducing the size of the auxiliary controller. be able to.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a washing tub of a fully automatic washing machine according to the present invention with its washing tub turned down, and showing the bottom outside thereof.

FIG. 2 is a perspective view showing an attached state of an auxiliary controller according to the present invention.

FIG. 3 is a vertical side view of an auxiliary controller according to the present invention.

FIG. 4 is a vertical side view of a conventional fully automatic washing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Controller cover 2 Center base 3 Motor 5 Auxiliary controller 6 Rectifier 8 Semiconductor switching element 110 Clutch mechanism 103 Washing tub 117 Main controller

Continued on the front page (72) Inventor Kazuo Tahara 7-1-1, Omikacho, Hitachi City, Ibaraki Prefecture Within Hitachi Research Laboratory, Hitachi, Ltd. (72) Inventor Toshiyuki Yasushima 7-1-1, Omikamachi, Hitachi City, Ibaraki Prefecture Shares Hitachi, Ltd. Hitachi Research Laboratory (56) References JP-A-4-67758 (JP, A) JP-A-3-182294 (JP, A) JP-A-4-54999 (JP, A) JP-A-5-253390 (JP, A) Shokai Sho 61-92386 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) D06F 39/12 D06F 37/40

Claims (4)

(57) [Claims] 1. A stirrer and a basket are rotatably arranged in a washing tub, and the stirrer and the basket are driven by a motor to automatically perform a series of washing operations such as washing, rinsing, and dehydration. In the washing machine, the main control
Install the controller on the top cover to
Auxiliary controller with inverter circuit to control
The main controller is located below the washing tub, and the main controller is
A control signal for controlling the washing operation according to the input from
A fully automatic washing machine characterized in that the generated washing machine is provided to the auxiliary controller . 2. The fully automatic washing machine according to claim 1, wherein the auxiliary controller is integrally disposed outside a bottom of the washing tub. 3. The fully automatic washing machine according to claim 1, wherein the auxiliary controller is integrally disposed on a center base supporting the motor outside the bottom of the washing tub. 4. The fully automatic washing machine according to claim 3, wherein the auxiliary controller has a circuit element generating a large amount of heat disposed close to the center base.