KR20040006276A - Drain Motor's drain Structure in Washing Machine - Google Patents

Abstract

PURPOSE: Drainage structure of a drain motor for a washing machine is provided to control the drain motor precisely by preventing short in collecting water between terminals with draining water out of the drain motor through a drain hole formed in a base in dewing from temperature difference. CONSTITUTION: A drain system of a washing machine comprises a cam connected to a drain valve regulating drainage of washing water in the washing machine to adjust the drain valve; a drain motor rotating the cam; a power unit supplying power to the drain motor; plural connecting terminals(310,320,330) connecting the power unit to the drain motor; a base(400) arranged in the lower part of the drain motor to place the connecting terminals and a switch; and a case(500) arranged in the lower part of the base to protect the connecting terminals and the switch. Drain holes(420,430) are formed at the side of the base, and dewing is prevented against difference between internal temperature and external temperature by insulating terminals. Wrong operation from tracking is prevented by evaporating or discharging water between terminals through drain holes with forming a groove.

Description

Drain Motor's drain Structure in Washing Machine

The present invention relates to a drainage structure of a washing machine drainage motor, and more particularly, to add a drainage hole at an appropriate position to facilitate drainage and ventilation, and to remove an insulated distance by removing ribs to improve tracking by water condensation. It relates to the drainage structure of the motor.

1 is a perspective view showing the appearance of a general drainage motor, and FIG. 2 is a circuit diagram of a general drainage motor.

As shown in Figure 1 and 2, the cam portion 10 is formed with a projection (11) for locking the drain valve for adjusting the amount of wash water built in the washing tank, and the cam portion to drive the cam portion to rotate The drainage motor 61, a power supply unit 20 for supplying power to the drainage motor, and a drainage motor unit 60 including a plurality of terminals connecting the power supply unit and the drainage motor 61 are switching units 71. ) Is connected to a controller 70 composed of a sensing unit 72, the switching unit 71 switches the motor 61, and the sensing unit 72 detects the cam position. The drainage motor 61 is operated as it is connected with 12 to determine the position of the cam.

In the drainage operation, when the ON signal comes from the switching unit 71, the motor 61 rotates. At this time, the cam 10 rotates by the rotation of the motor 61, and after a certain time, the cam is reversed. When stopped in the direction, the drain valve hook projection 11 formed on the cam is also stopped in the opposite direction to drain.

When the drainage is timed, the drainage is stopped by rotating the motor 61 until the cam switch 12 interlocked with the cam 10 in the drain motor 61 is turned off. It is initialized. When the cam position is initialized, the cam switch 12 is turned off, and the sensing unit 72 of the controller 70 detects that the cam switch 12 is off to detect that the position of the cam 10 is initialized.

3 is a cross-sectional view of a drain motor according to the prior art, and FIG. 4 is a plan view of the drain motor base and the case structure according to the prior art.

As shown in FIG. 3, the motor cover 62 covers the motor for the purpose of preventing and insulating water from the outside of the motor 61, and the inside of the drainage motor unit 60 is configured as shown in FIG. 4. . The base 40 is a plate positioned below the drain motor 61 to support the contact of the motor 61, and the connection terminal part 30 is disposed.

The connection terminal unit 30 is a motor switching connecting terminal 31 for switching the drain motor, the cam detecting unit connecting terminal 32 connected to the cam detecting unit for detecting the rotational movement of the cam, and a power supply for supplying power It is composed of a connecting terminal (33). In addition, it is configured to further include a movable switch and a fixed switch on the lower side of the case 50 to prevent insulation and water penetration from the switch.

As shown in FIG. 3, the water generated during condensation in the gap between the drain motor 61 and the motor cover 62 descends to the lower side of the drain motor 61 while being positioned at a base supporting the lower side of the drain motor. Between the switch portion (not shown) consisting of a switch and a fixed switch and the motor switching portion connecting terminal 31 and the cam sensing terminal 32 shown in FIG. A resistance is generated in the current, and as the current flows, the cam switch 12 is sensed not to be turned off even when turned off, thereby causing a malfunction in which the cam 10 continues to rotate.

That is, when power is applied through the power connection terminal 33, power is applied to the motor switching unit connection terminal 31 to operate the drainage motor 61, and the cam 10 rotates by the movement of the drainage motor. The cam detecting unit 72 and the cam switch 12 are connected by the cam detecting unit connecting terminal 32 for detecting a position. At this time, if the section between the motor switching connection terminal 31 and the cam sensing connection terminal 32 is electrically conducted by water, a voltage is applied between the both terminals, and the short circuit causes a risk of failure of the drain motor and a desired drainage function. There is a problem that does not perform properly.

In addition, the case combined with the conventional base as shown in FIG. 4 has a disadvantage that the drain hole 42 is formed on a single side, so that the drain hole is installed on a flat surface and the drainage is not smooth.

The present invention has been made to solve the above problems of the prior art, the purpose of the drain hole 430 in the base to prevent the malfunction of the drain motor due to the condensation phenomenon caused by the rapid temperature difference between the inside and the outside of the drain motor The inner rib 44 protrudes between the motor switching part connecting terminal 31 and the cam detecting part connecting terminal 32 located in the base by efficiently discharging or evaporating water accumulated in the drain motor. It is to provide a drainage structure of the washing machine drainage motor to prevent the malfunction of the drainage by securing the insulation distance by removing the.

1 is a perspective view showing the appearance of a general drainage motor,

2 is a circuit diagram of a general drainage motor,

3 is a cross-sectional view of the drain motor according to the prior art,

4 is a plan view of the drainage motor base and the case structure according to the prior art,

5 is a plan view of the drainage motor base and the case structure according to the present invention;

Figure 6 is a perspective view showing a coupling structure of the drainage motor base and the case according to the present invention.

<Explanation of symbols on main parts of the drawings>

10: cam 20: power supply

30: Terminal part 31,310: Motor switching part connecting terminal

32,320: Cam detection unit connection terminal 33,330: Power connection terminal

40,400: Base 42,420,430: Drainage hole

44: rib 50,500: case

60: drainage motor portion 61: drainage motor

65: drain port 70: controller

71: switching unit 72: sensing unit

440: rib removal groove 510: inner rib

According to a feature of the drainage structure of the drainage motor of the washing machine of the present invention for solving the above problems, a cam for adjusting the drainage valve is connected to a drain valve for adjusting the amount of wash water drained in the washing tank, the cam A drain motor for driving a rotational movement of the motor, a power supply unit for supplying power to the drain motor, a plurality of connection terminals connecting the power supply unit and the drain motor, and disposed at a lower side of the drain motor; In the structure of the drainage motor of the washing machine consisting of a base located therein, and a case disposed below the base to protect the connection terminal and the switch,

The base is characterized in that the drainage hole 430 is added to facilitate drainage, and the inner rib 44 is removed to be insulated between the terminals, thereby improving drainage and insulation structure due to condensation.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

5 is a plan view of the drainage motor base and the case structure according to the present invention, Figure 6 is a perspective view showing a coupling structure of the drainage motor base and the case according to the present invention.

The overall configuration and detailed description of the drainage motor unit 60 is the same as the detailed description of the conventional invention, so the description in the present invention shall apply mutatis mutandis.

The base 400 is disposed below the drain motor 61, and a plurality of connection terminals connected to the drain motor are positioned as plates for supporting the contacts of the drain motor.

As the plurality of drain holes 420 and 430 are located at one side of the base in addition to the basic drain holes 640 and 650, condensation may be improved due to a sudden temperature difference between the inside and the outside of the drain motor unit 60. Therefore, the plurality of drainage holes 420 and 430 may more easily evaporate or discharge the water accumulated in the drainage motor unit 60.

In addition, as the groove 440 is formed to delete the ribs 44 formed in and out between the motor switching connection terminal 310 and the cam sensing connection terminal 320 among the plurality of connection terminals positioned on the base. The tracking phenomenon caused by the accumulated water between the both terminals is prevented.

The tracking phenomenon is a motor switch for controlling the on / off of the cam switch and the drain motor to control the movement of the cam as the electrical connection between the two terminals due to the resistance of the water is generated and It is to perform malfunction that repeats blocking.

Therefore, in order to prevent the tracking phenomenon caused by stagnant water between both terminals, a groove 440 for removing the ribs 44 existing between both terminals is formed to secure an insulation distance between both terminals.

The case 500 protects the switches and the connection terminals formed on the base as the plurality of connection terminals of the base 400 are coupled through the connection terminal holes formed in the case 500. In particular, the motor switching connection terminal 310, the cam sensing unit connection terminal 320 and the power connection terminal 330 located in the base abuts the terminal contact surface of the case 500.

Between the motor switching connection terminal 310 and the cam sensing unit connection terminal 320, ribs 510 are formed to be protruded inward to be inserted into the rib removing grooves 440. Accordingly, instead of forming the rib removing groove 440 to delete the rib 44 formed in the base where water is accumulated between the terminals, the rib 510 serving as a strength reinforcement in place of the removed rib 44 is formed. The water is formed so as to protrude to the inside of the terminal contact surface of the case 500 does not have to worry that it is to be inserted into the rib-removing groove 440.

The drainage structure of the drainage motor according to the present invention has been described above with reference to the illustrated drawings, but the present invention is not limited by the embodiments and the drawings disclosed in the present specification and may be applied.

The drainage structure of the washing machine drainage motor of the present invention configured as described above has a drainage hole formed in the base supporting the lower side of the drainage motor so that the wastewater is smoothly drained or evaporated in the base, and also between the connection terminals installed in the base. By removing the rib formed to protrude in the insulating distance, there is an effect of preventing the malfunction of the drain motor and the cam due to the tracking phenomenon caused by the accumulated water between the both terminals.

Claims (3)

A cam connected to a drain valve for adjusting an amount of the wash water contained in the washing tank and controlling the drain valve, a drain motor for driving a rotational movement of the cam, a power supply for supplying power to the drain motor, and A plurality of connection terminals connecting the power supply unit and the drain motor, a base disposed under the drain motor to position the connection terminal and the switch, and a case disposed below the base to protect the connection terminal and the switch. In the structure of the drainage motor of the configured washing machine, The base is a drainage structure of a washing machine drainage motor, characterized in that it comprises a plurality of drainage holes for the wash water introduced by the drainage motor and a groove to insulate between the connection terminal. The method of claim 1, The plurality of connection terminals include a power connection terminal, a motor switching connection terminal connected to a switch controlling a drain motor, and a cam detection unit connection terminal connected to a cam detection unit detecting a rotation of a cam. The groove is a drainage structure of the washing machine drainage motor, characterized in that formed between the motor switching connection terminal and the cam detecting unit connection terminal. The method of claim 1, The case drainage structure of the washing machine drainage motor, characterized in that the projection is formed in the groove formed in the base is formed.