JP3248399B2 - Washing machine with commutator motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine equipped with a commutator motor.

[0002]

2. Description of the Related Art When a conventional commutator motor incorporates a choke coil for preventing noise, it is common to use a substrate on which the choke coil is mounted. Also when using a substrate, the choke coil is housed inside the motor.

[0003]

However, when the substrate is mounted, there are problems of waterproofing of the substrate and creepage distance between the patterns of the substrate, and when the substrate is used under high humidity such as for a washing machine. However, there is a disadvantage that it is necessary to provide an external choke coil or perform an expensive moisture-proof treatment on the substrate.

On the other hand, when a choke coil is connected to the outside, it is located at a position distant from the motor brush, so that there is a disadvantage that the noise prevention effect is reduced.

According to the present invention, a substrate is not required as compared with the prior art, cost can be reduced, and furthermore, the moisture resistance of the choke coil connection portion is improved, and the deterioration of the choke coil is minimized. It is an object of the present invention to provide a washing machine equipped with a commutator motor having a longer life.

[0006]

A feature of the present invention is that, in a washing machine equipped with a commutator motor, a noise preventing element is built into a motor cover disposed between a brush of the commutator motor and an external connection terminal. A washing machine equipped with a commutator motor characterized in that:

[0007]

Since the substrate can be eliminated, the cost can be reduced, and a sufficient creepage distance can be ensured, so that a washing machine equipped with a choke coil having good moisture resistance can be provided.

[0008]

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a top cover of the washing machine, 2 is a controller for controlling the operation of the washing machine,
The controller 2 is constituted by a microcomputer or the like including a timer, and is built in the front of the top cover 1.

Reference numeral 3 denotes a membrane switch which allows the operator to externally specify the operation of the washing machine. Reference numeral 4 denotes a lid.
Open upward with the axis as the axis.

Reference numeral 6 denotes a laundry inlet, and 7 denotes a cover for preventing the laundry from dropping between a washing and dewatering tub (hereinafter abbreviated as a washing tub) 8 and an outer tub 9. It is provided at the top.

Reference numeral 10 denotes a dehydration hole formed in the wall of the washing tub 8. 11 is a balance ring, which is used for washing tub 8 during dehydration operation.
Rotate smoothly.

Reference numeral 12 denotes a hanging rod, which is connected to the outer tank 9 via a spring 13.
Hanging up. Reference numeral 14 denotes a stirring blade, which is installed at the bottom of the washing tub 8.

Reference numeral 15 denotes a motor. The power of the motor 15 is transmitted via a motor pulley 16, a belt 17, a driven pulley 18, and a clutch / reduction unit 19 to the stirring blades 14 during washing and rinsing.
During the dehydration, the washing tub 8 and the stirring blade 14 are driven together.

Reference numeral 20 denotes a leg for supporting the outer frame 21, and reference numeral 22 denotes a drain hole provided at the bottom of the outer tub 9. Downstream of the drain hole 22, a drain solenoid valve 2 which opens and closes in response to a command from the controller 2 is provided.
3 and a drain hose 24. 25 is a back panel.

Reference numeral 26 denotes a bath water suction pump whose casing is formed of a synthetic resin containing an antibacterial agent, and is incorporated in the top cover 1.

Numeral 27 is a bath water absorption hose containing an antibacterial agent.
The rear end is attached to a bath water inlet 26a provided on the upper surface of the pump 26 via an O-ring 28.

In FIG. 2 showing the internal structure with the back panel 25 removed, reference numeral 1a shares a water supply port provided on the top cover 1 for supplying tap water into the washing tub and a water supply port for supplying bath water. Tap water inlet and bath water inlet,
A softer is also supplied from the tap water inlet / bath water inlet 1a.

4 is a lid, 26 is a pump, 26a is a bath water inlet, 26b is a bath water discharge pipe, 29 is a lid switch, 30
Denotes a tap water faucet, and 31 denotes a water supply solenoid valve for supplying tap water into the washing tub 8.

In FIG. 3 showing the internal structure of the bath water suction pump 26, reference numeral 26a denotes a bath water suction port of the pump 26;
Is a casing, 43 is a pump motor, 42 is a runner, 4
Reference numeral 8 denotes a mechanical seal, 41d denotes a water absorption chamber, 41c denotes an air / water separation chamber, and 44 denotes a partition plate, and a bath water suction port 26a provided on the upper surface of the pump 26 is also used as a calling water suction port.

Reference numeral 46 denotes a check valve provided at the outlet of the bath water inlet 26a. The upper end surface of the bath water inlet 26a is higher than the lower surface of the bath water outlet.

The bath water sucked into the water suction chamber 41d of the pump 26 is sent to the air / water separation chamber 41c via the runner 42 by the same water supply method as that of the conventional pump of this type.
The bath water sent to the air / water separation chamber 41c is thereafter supplied into the washing tub 8 via the bath water discharge pipe 26b.

The details of the structure of the pump motor 43 are shown in FIGS. 4 and 5, and its electric circuit is shown in FIG.

Reference numeral 53 denotes a motor case, 54 denotes a rotor, 55
Is a magnet, 56 is a motor cover made of flame-retardant resin, 5
7 is a commutator connected to the winding of the rotor, 58 is a carbon brush which slides and supplies power to the commutator, 59 is a lead wire connected to the carbon brush, 60 is a choke coil for absorbing noise, and a motor cover 56 Is provided in a concave portion 56A opened to the outside air side.

Reference numeral 61 denotes an external connection terminal, 62 denotes a connection fitting for relaying the choke coil 60 and the lead wire 59, 61
a is a choke coil connection portion provided at the external connection terminal,
63 and 64 are coils and capacitors for absorbing line noise, and 65 is a rectifier. The current rectified by the rectifier 65 is supplied to the winding of the rotor 54 through the coil 63, the external connection terminal 61, the choke coil 60, the lead wire 59, the carbon brush 58, and the commutator 57, and the pump motor rotates.

At this time, the carbon brush 58 and the commutator 57
Although noise is generated from the sliding portion of, the radiated noise is absorbed by the choke coil.

The choke coil 60 is a carbon brush 58
, And provided near the sliding portion of the commutator 57, the absorption effect is large. The line transmission noise is absorbed by the coil 63 and the capacitor 64.

As described above, according to the present embodiment, since the choke coil for noise prevention is mounted without a substrate, it is inexpensive, the creepage distance between the poles can be widened, and even when used under high humidity, It can be highly reliable.

On the other hand, since the choke coil is provided in the concave portion outside the motor cover, the choke coil is not affected by a rise in temperature during operation of the motor, and the life can be extended.

Further, by using a flame-retardant resin for the motor cover, even if the choke coil is burned, it is possible to prevent the spread of fire to other parts.

Further, there is an effect that radiation noise and line transmission noise can be efficiently absorbed by the choke coil built into the motor and the coil and the capacitor mounted outside.

[0032]

As described above, according to the present invention, the choke coil for noise prevention is mounted without a board, so that the cost is low, the creepage distance between the poles is wide, and the reliability is high even when used under high humidity. Can be high.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an entire internal structure showing an embodiment of a washing machine of the present invention.

FIG. 2 is a plan view showing an internal structure with a back panel removed.

FIG. 3 is a partially broken perspective view showing the internal structure of a bath water suction pump 26.

FIG. 4 is a view as seen from a pump motor terminal side.

FIG. 5 is a sectional view taken along line AA of FIG. 5;

FIG. 6 is a circuit diagram of a pump motor.

[Explanation of symbols]

1 ... Top cover, 8 ... Washing tub (washing and dewatering tub), 25
... back panel, 26 ... bath water suction pump.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Toshihiko Sekizawa 1-1-1, Higashitaga-cho, Hitachi City, Ibaraki Prefecture Hitachi, Ltd. Electrical Appliances Division, Taga Headquarters (56) References JP-A-7-47189 (JP) JP-A-60-58196 (JP, A) JP-A-4-105697 (JP, A) JP-A-6-205568 (JP, A) JP-A-57-192595 (JP, A) 6-238089 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) D06F 39/08 321 H02K 13/14 H02P 7/638

Claims (1)

(57) [Claims] 1. A bath water suction pump is built in a top cover.
In the washing machine, the bath water suction pump includes a steam-water separation chamber,
A commutator motor is mounted as the motor of the water absorption pump,
Located between commutator motor brush and external connection terminals
A built-in choke coil in the motor cover
The coil is installed in a recess opened to the outside air side of the motor cover.
A washing machine characterized by being placed .