JP2003340192A - Fully automatic washer-dryer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fully automatic washer-dryer using an inexpensive and low-noise motor. <P>SOLUTION: For realizing a low cost of a DC power source, a detergent dissolving motor, a bath water pump motor and an air blowing fan motor are formed as control specifications so that operation time does not overlap each other, and one switching power source is used, and voltage is also set to low voltage so that a cost of various electric parts is largely reduced, and noise is reduced. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a fully automatic washer / dryer.

[0002]

2. Description of the Related Art FIG. 1 is a side view of a vertical section of a fully automatic washer / dryer. Inside the outer frame 1, there is a washing tub 4 in an outer tub portion 3 supported by a plurality of suspensions 2, a pulsator 5 for stirring at the bottom thereof, and a drive incorporating a main motor coaxially with its shaft. The part 6 is located. In the top cover portion 7 of the upper surface portion, a display substrate 8 and a main substrate 9 for controlling various electric parts are also divided and housed. The heater 10 for drying, the detergent melting portion 11 and the bath are provided. A water pump 12 and the like are also stored. The blower fan motor 13 is disposed in the lower part of the outer tub 3, circulates the heat generated by the heater in the washing tub to dry the laundry in the washing tub, and the air containing a large amount of steam is contained in the condenser 14. It is effectively dried by cooling with tap water and condensing.

FIG. 2 shows a configuration of a conventional example. It shows a simplified block diagram of a drive circuit of a main motor including the three motors described in the claims, and omits detailed portions such as a display unit and other electric parts. Hereinafter, FIG. 2 will be described. The input power source is a commercial power source 16 for general households and AC
100V, 50Hz or 60Hz is used. The main motor 17 rectifies this by a voltage doubler rectifier circuit 18 to obtain a DC power supply, supplies this to an inverter drive circuit 19, and drives the main motor 17 by a control signal from a microcomputer 20. Starting and stopping of each motor can be controlled from the microcomputer 22 by independent switches 22a and 22b and a control signal to an inverter drive circuit incorporated in the motor.

Since the detergent melting motor 11 consumes a small amount of power and operates for a short period of time, a low-voltage brush DC motor is generally used. The transformer 24 is used to step down the commercial power source and then full-wave rectify the power. is doing. For this reason,
There is a problem in that it is necessary to secure a space for placing the transformer 24 in the top cover, and it takes time to fix the transformer 24 for heavy objects and wiring.

Since the bath water pump motor 12 consumes a relatively large amount of power, the output capacity of the transformer is large when the voltage is stepped down by using a transformer or the like. . Therefore, the applied voltage becomes high and the spike noise generated from the brush portion when the motor is operated becomes large. As a countermeasure, the Δ type capacitor 2
6 must be used. Since the Δ-type capacitor is grounded to the ground, it is necessary to use one that complies with safety standards, and there is a problem that expensive parts must be added.

Similarly, the fan 13 for blowing air is used to extract the heat heated by the heater, but since the output is larger than the motor 12 for the bath water pump, a transformer or the like is not used and a commercial power source is used. Direct full-wave rectification and power supply, and power supply to a brushless DC motor with a built-in high-voltage inverter drive circuit. However, there is a problem in that the electronic components used in the drive circuit are made high in withstand voltage and are expensive because the insulation of the motor winding is strengthened, resulting in a disadvantageous structure in terms of price.

Further, the detergent melting motor 11 and the bath water pump motor 12 do not have a function of correcting the influence of the fluctuation of the voltage of the commercial power source, so that the fluctuation of the rotation speed is large.

[0008]

As described above, the conventional washer / dryer is equipped with a power supply circuit for supplying power to the detergent motor, the bath water pump motor, and the fan motor for blowing air, which is expensive and complicated. It was a system. or,
When a transformer is used to supply electric power to each motor, there is a problem that a large installation space is required and the cost becomes expensive. The present invention solves these problems.

[0009]

[Means for Solving the Problems] (First Invention) Spike noise generated from a brush portion of a bath water pump motor can be reduced to reduce noise countermeasure parts, and an inverter drive circuit for a blower fan motor. In order to lower the withstand voltage and to lower the insulation performance of the motor windings, lower the rated voltage. Further, since the power source circuits of the motors 13 for the detergent-dissolving motor, the bath water pump motor and the blower fan motor are shared, the rated voltage is unified and one switching power source 31 is used.
Drive with. (Second invention) In order to reduce the output power of the shared power source,
In the first aspect of the invention, the control specifications are such that each motor is not operated at the same time during operation, and the maximum output of the switching power supply is determined according to the maximum input of each motor. (Third invention) Further, since the power supply circuit is shared, the switching power supply for driving each motor is integrated with the switching power supply for supplying power to the microcomputer or the like.

[0010]

FIG. 3 is a vertical sectional side view of a fully automatic washer / dryer according to an embodiment of the present invention. Inside the outer frame 1, there is a washing tub 4 in an outer tub 3 supported by a plurality of suspensions 2, a pulsator 5 for stirring at the bottom thereof, and a main motor 17 is incorporated coaxially with its shaft. The drive unit 6 is located. In the top cover portion 7 of the upper surface portion, the display substrate 8, the heater 10 for drying, the detergent melting portion 11, the bath water feed pump 12, and the like are also stored. The main board 15 that controls each electric component is arranged in a portion near the bottom of the outer tub 3 and is electrically connected by a wire harness. The main board 15 is arranged at the bottom of the outer tank part 3 not only in the top cover of the electric component but also in the outer tank part 3.
This is because a considerable number of them are also installed inside, and it is easier to secure a space for installing the main board at the bottom of the outer tub 3. The blower fan motor 13 is disposed in the lower part of the outer tub 3, circulates the heat generated by the heater in the washing tub to dry the laundry in the washing tub, and the air containing a large amount of steam is contained in the condenser 14. It is effectively dried by cooling with tap water and condensing.

FIG. 4 shows the configuration of an embodiment of the present invention. It shows a simplified block diagram of the main motor drive unit, omitting detailed parts such as the display unit and other electric parts.
The power source uses the commercial power source 16, 100V, 50H
Use z or 60 Hz. The main motor 17 rectifies this by a voltage doubler rectifier circuit 18 to supply a DC power source to an inverter drive circuit 19, and drives a brushless DC motor, which is the main motor 17, by a control signal from the microcomputer 20. . Each motor has an independent switch 2
The start and stop can be controlled from the microcomputer 22 by control signals to 2 and the built-in inverter drive circuit.

In this embodiment, the detergent melting motor 11, the bath water pump motor 12, and the blower fan motor 13 are integrated with the switching power supply 31 for driving the microcomputer, thereby simplifying the power supply circuit.

The rated output of the switching power supply 31 is set so that the blower fan motor 13 which consumes the most power in this embodiment can be driven, and since the specifications are such that the motors are not operated simultaneously, this output capacity Is enough. Also,
Conventionally, the commercial power source was full-wave rectified and directly fed, so that if the voltage of the commercial power source fluctuates, the rotation speed fluctuates in proportion to it. However, the switching power source 3 used in this embodiment
1 is 25 ± 1 even if the commercial power supply voltage fluctuates by ± 12%.
The control is performed so as to be suppressed within the range of (V), and fluctuations in the rotation speed are suppressed. By using a low-voltage power supply, the bath water pump motor 12 has a significantly reduced amount of brush wear and a significantly improved operating life, and the spike noise generated in the brush portion has also been greatly reduced. Δ
Mold capacitors are no longer needed. The blower fan motor 13 has conventionally adopted a built-in circuit type less-less motor. In high voltage specifications, it is necessary to improve the electrical insulation performance of the built-in circuit, especially the tracking resistance performance. Although it was necessary to strengthen the insulation performance, this measure became unnecessary due to the low pressure, and the workability was significantly improved. Moreover, since the general-purpose sensorless drive circuit can be adopted by making the voltage low and the rotor magnetic pole position sensor does not need to be built in the motor, the inverter drive circuit can be mounted on the main board 9 and purchased separately for the brushless motor. It became possible, and it was possible to significantly reduce the purchase price.

[0014]

According to the present invention, in a fully automatic washer / dryer, a solvent melting motor, a bath water pump motor, and a fan fan motor are driven at a low voltage by a single switching power supply, so that the detergent melting motor is a transformer. A system that includes a power supply and electrical components by eliminating the full-wave rectification circuit, the bath water pump motor using a Δ-type capacitor, and the fan motor for blowing air by eliminating the full-wave rectification circuit and using a DC power supply as a switching power supply It is possible to provide a low-priced fully automatic washer / dryer. In addition, the bath water pump motor has a lower voltage, and as the energy of brush sparks decreases,
The generated noise is suppressed and the life is greatly improved.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view showing an embodiment of the basic configuration of a conventional fully automatic washer / dryer.

FIG. 2 shows a simplified block diagram of a conventional fully automatic washer / dryer.

FIG. 3 is a vertical sectional side view showing an embodiment of the basic configuration of the fully automatic washer / dryer of the present invention.

FIG. 4 shows a simplified block diagram of the fully automatic washer / dryer of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Outer frame, 2 ... Suspension, 3 ... Outer tub part, 4 ... Washing tub, 5 ... Pulsator, 6 ... Drive part, 7 ... Top cover part, 8 ... Display substrate, 9 ... Main substrate, 10 ... Drying Heater, 11 ... Detergent melting motor, 12 ... Bath water pump motor, 13 ... Blower fan motor, 14 ... Condensing device, 1
6 ... Commercial power supply, 18 ... Double voltage rectification circuit, 19 ... Inverter drive circuit, 20 ... Microcomputer, 22a, 22b ... Switch, 24 ... Transformer, 26 ... Δ type capacitor, 31 ... Switching power supply

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tomohiro Okawa             1-1 1-1 Higashitaga-cho, Hitachi-shi, Ibaraki             Standing Home and Life Solution             Inside the Taga Office (72) Inventor Atsushi Hosokawa             1-1 1-1 Higashitaga-cho, Hitachi-shi, Ibaraki             Standing Home and Life Solution             Inside the Taga Office (72) Inventor Naoto Hattori             1-1 1-1 Higashitaga-cho, Hitachi-shi, Ibaraki             Standing Home and Life Solution             Inside the Taga Office F term (reference) 3B155 AA10 AA16 BA23 BB05 BB19                       CB07 CB42 CB49 HC07 LA01                       LA11 LA12 LA13 LC15 LC28                       MA02 MA08                 5H572 AA20 BB02 BB05 CC05 DD02                       DD03 DD09 HC10

Claims (3)

[Claims] 1. A runner driving motor for melting a detergent (hereinafter, a detergent melting motor), a water pump driving motor for feeding water other than tap water (hereinafter a bath water pump motor), and a blower fan driving. A fully automatic washing machine with a drying function, which is equipped with a motor (hereinafter referred to as a fan motor for blower), and the rated voltage of each motor is reduced to a uniform value so that power is supplied from a single switching power supply. 2. A control specification according to claim 1, wherein each motor is not operated at the same time during operation, and the maximum output of the switching power supply is determined according to the maximum input of each motor. Fully automatic washer / dryer. 3. A fully automatic washer / dryer according to claim 1, wherein the switching power supply for supplying power to each motor is integrated with the switching power supply for supplying power to a microcomputer or the like.