KR101445733B1 - Drain pump and washing machine having the same - Google Patents

Abstract

An object of the present invention is to provide a drain pump and a washing machine including the drain pump that can prevent moisture from penetrating into the terminal side of the pump motor.

To this end, the present invention provides an electric motor comprising: an impeller; a pump motor having a terminal for driving the impeller; a motor cover for covering the pump motor; and a motor cover provided on the motor cover to prevent penetration of wash water into the terminal. And a terminal protection cover for preventing the water from flowing into the terminal.

Description

[0001] Drain pump and washing machine including same [0002]

1 is a perspective view showing a pump motor included in a conventional washing machine.

2 is a perspective view showing a rough internal structure of a washing machine according to an embodiment of the present invention.

3 is an exploded perspective view of a drain pump included in a washing machine according to an embodiment of the present invention.

4 is an assembled perspective view of a drain pump included in a washing machine according to an embodiment of the present invention.

Figure 5 is a schematic side cross-sectional view of Figure 4;

Description of the Related Art [0002]

10: main body 11: aquarium

20: Drain device 21: Drain casing

22,23: Drain hose 30: Drain pump

31: impeller 32: wire

32a: connection section 40: pump motor

42: Terminal 50: Motor cover

56: terminal groove 57: rib

58: fixing part 60: terminal protection cover

61: Hook

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain pump and a washing machine including the same, and more particularly, to a drain pump having a structure capable of preventing moisture from penetrating into a terminal side of a pump motor and a washing machine including the same.

2. Description of the Related Art [0002] Generally, a washing machine is a device for washing laundry by using a water drop while rotating a drum. The washing machine includes a body having an outer appearance, a water tank for containing water inside the body, a drum rotatably installed in the water tank, A driving motor for generating a rotational force on the drum is provided. A water supply device is provided on the upper side of the main body so as to supply water to the water tank, and a drainage device is provided on the lower side of the main body so that water contained in the water tank can be drained.

The drain pump has a drain casing through which water exiting the water tank flows, and a pump motor is provided to extract the water introduced into the drain casing out of the body. The drain casing is provided with an inlet for introducing water into the inside thereof and an outlet for discharging water out of the drain casing.

Such a drainage pump may cause water to penetrate the terminal portion of the pump motor located at the lower side of the main body when leakage occurs in a diaphragm or a water inlet, causing an electric malfunction or a fire in severe cases.

1 is a perspective view showing a pump motor included in a conventional washing machine.

In the prior art, as shown in FIG. 1, a motor cover 2 is provided to cover the pump motor 1 in order to prevent water from penetrating into the pump motor 1.

However, since the conventional motor cover 2 covers the top and both sides of the terminal 3 and the rear side of the motor cover 2 is open, moisture is prevented from flowing in the rear direction of the motor cover 2 Can not.

When the wire 4 is not firmly coupled to the terminal 3 in the binding process of the terminal 3 and the wire 4, the connecting portion 5 of the wire 4 can be separated from the terminal 3 There is a problem.

The wire 4 connected to the terminal 3 extends upward and is connected to a power source (not shown). When water contacts the wire 4, moisture flows along the wire 4 to the terminal 3 side There is a problem to penetrate.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a drain pump and a washing machine including the same, which can prevent moisture from penetrating into a terminal side of a pump motor.

Another object of the present invention is to provide a drain pump and a washing machine including the drain pump that can prevent the wire from being detached from the terminal.

In order to accomplish the above object, the present invention provides an electric motor comprising: an impeller; a pump motor having a terminal for driving the impeller; a motor cover for covering the pump motor; And a terminal protective cover for protecting the terminal.

The terminal protection cover is integrally formed with the motor cover, and is openable and closable at one side of the motor cover.

In order to engage the terminal cover and the motor cover, either the terminal protection cover or the motor cover is formed with a hook and the other is formed with a rib.

Further, a wire formed with a connection portion for connection with the terminal may be further provided, and the terminal protection cover supports one side of the wire to prevent the connection portion from being detached from the terminal.

Further, the motor cover is provided with a fixing portion so that the wire can be fixed upward toward the terminal.

In the washing machine according to the present invention, the washing machine includes a drain pump. The washing machine includes an impeller, a pump motor having a terminal for driving the impeller, a motor cover covering the pump motor, And a terminal protective cover for covering the terminal by being engaged with the motor cover to prevent the terminal cover.

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

2 is a perspective view showing a rough internal structure of a washing machine according to an embodiment of the present invention.

As shown in FIG. 2, the washing machine according to the embodiment of the present invention includes a main body 10 having an approximately box shape and forming an outer appearance of the washing machine, a drum 10 installed inside the main body 10, (12) rotatably installed in the water tub (11) and having a plurality of dewatering holes (12a) formed on the surface thereof, and a rotary drum (12) A water supply device 15 for supplying detergent and water to the inside of the water tub 11 and a water drainage device 15 for draining the washing water in the water tub 11 to the outside, (20).

The front surface of the water tub 11 and the rotary tub 12 are open to allow the laundry to be washed into the rotary tub 12 or to take out the laundry after the washing in the rotary tub 12, A door for opening and closing the open front face of the water tub 11 and the rotary tub 12 is hingedly connected.

On the inner circumferential surface of the rotary tub 12, a plurality of lifters 12b for lifting the laundry from the lower part of the rotary tub 12 to the upper part are arranged at regular intervals.

The water supply device 15 includes a water supply hose 15a which is provided in the upper part of the inside of the main body 10 to receive wash water from an external water supply source, a water supply valve 15b which opens and closes the water supply hose 15a, And a detergent container 15c for allowing the detergent to be mixed with the washing water and sent to the water tub 11. [

Accordingly, when the washing machine is operated after the door is opened and the laundry is put into the rotary tub 12, the washing water mixed with the detergent is supplied to the tub 11 through the water supply device 15, The laundry is lifted upward along the lifter 12b and falls downward, thereby washing the laundry.

A drainage device 20 is disposed inside the main body 10 of the washing machine according to the present invention. The drainage device 20 includes a drainage hose 20 for draining the wash water contained in the water tank 11 to the outside of the main body 10, A drainage casing 21 connected to the drain hoses 22 and 23 and having a space through which wash water can flow, And a drain pump 30 for discharging the water to the outside.

The drain hoses 22 and 23 are provided with a first drain hose 22 for introducing the wash water of the water tub 11 into the drain casing 21 and a second drain hose 22 for discharging the water of the drain casing 21 to the outside of the main body 10 And a second drain hose (22).

Also, a drain filter (not shown) for removing foreign substances contained in the washing water flowing into the drain casing 21 is detachably provided to the drain casing 21.

FIG. 3 is an exploded perspective view of a drain pump included in the washing machine according to an embodiment of the present invention, FIG. 4 is an assembled perspective view of the drain pump of FIG. 3, and FIG. 5 is a schematic side sectional view of FIG.

3 and 4, the drain pump 30 is provided at one side of the drain casing 21 and includes an impeller 31 for forcibly discharging the wash water of the water tub 11 to the outside, A motor cover 50 provided on the rear side of the pump motor 40 for providing a driving force to the impeller 31, a motor cover 50 for preventing moisture from flowing into the pump motor 40, 32).

The impeller 31 is for forced discharge of washing water and is provided inside the drain casing 21 by being coupled to the rotary shaft 41 of the pump motor 40.

The pump motor 40 includes a stator (not shown), a rotor (not shown) and a rotary shaft 41. A terminal 42 for applying power to the pump motor 40 is connected to the pump motor 40 And protrudes rearward.

The motor cover 50 is substantially box-shaped, and the lower side thereof is opened so as to be fittable to the pump motor 40, and a mounting portion 51 is formed therein. Therefore, the motor cover 50 is fitted to the upper portion of the pump motor 40 so as to enclose the upper portion of the pump motor 40, thereby preventing moisture from flowing into the pump motor 40.

An upper guide portion 52 is provided on the outer surface of the motor cover 50 so that water falling down from the water tub 11 to the upper portion of the motor cover 50 is guided to the lower side of the motor cover 50, The side surface of the motor cover 50 is provided with a side surface guide 54 formed in a downwardly inclined manner along the outer shape of the motor cover 50 so that water guided along the upper guide portion 52 can be dropped to the bottom of the main body 10 along the side surface of the motor cover 50. [ A portion 53 is provided.

A wire hooking portion 54 is formed on the upper surface of the motor cover 50 to fix the wire 32 to the motor cover 50.

A partition wall 55 for supporting the pump motor 40 is provided in the rear side of the motor cover 50. The partition wall 55 is provided with a terminal groove 42 for allowing the terminal 42 of the pump motor 40 to protrude to the outside. (56) is formed.

The motor cover 50 thus formed is connected to the motor cover 50 by the pump motor 40 so that the upper surface of the motor cover 50 covers the upper portion of the terminal 42, Since the rear side of the motor cover 50 is opened, the inflow of water into the rear side of the motor cover 50 can not be completely blocked.

The drain pump 30 of the present invention is provided with the terminal protection cover 60 for preventing the inflow of water from the rear side of the motor cover 50 toward the terminal 42 side.

The terminal cover 60 may be formed as a separate component from the motor cover 50 and may be coupled to the rear surface of the motor cover 50. In the embodiment of the present invention, ) Are integrally formed. That is, the terminal protection cover 60 is formed to extend from the rear end of the upper surface of the motor cover 50, and is rotatable up and down.

Hooks 61 are formed on both ends of the terminal protection cover 60 for engagement with the motor cover 50 and the ribs 57 are formed on the rim side corresponding to the motor cover 50.

The terminal protection cover 60 and the motor cover 50 can be coupled in various ways, and the hooks and ribs are only examples. Needless to say, it is also possible to provide a rib on the terminal protection cover 60 and to provide a hook on the motor cover 50. [

A fixing portion 58 for fixing the wire 32 is provided under the rear frame of the motor cover 50. The fixing portion 58 is fixed to the bottom surface of the rear portion of the motor cover 50, And is provided at a height lower than the height of the terminal 42 so that the wire 32 can be disposed downwardly inclined from the connection portion 32a.

This is to prevent water flowing on the wire 32 from flowing into the terminal portion.

A wire 32 is connected to the terminal 42 protruding through the terminal groove 56. A connecting portion 32a for connecting the terminal 42 to the terminal 42 is provided at an end of the wire.

If the operator does not firmly connect the connection portion 32a to the terminal 42 at the time of manufacture or service, if the connection portion 32a of the wire 32 is detached from the terminal 42 by vibration or the like due to use of the washing machine Since the terminal protecting cover 60 is disposed adjacent to the rear side of the connecting portion 32a of the wire 32 in the present invention, the terminal protecting cover 60 supports the wire 32, The connection portion 32a of the terminal 32 can be prevented from being detached from the terminal 42. [

As described above, the drain pump and the washing machine including the same according to the present invention have a motor cover for covering the pump motor and a terminal protection cover for covering the terminals of the pump motor, thereby improving the blocking effect of water introduced into the terminals There is an effect that can be.

Further, according to the present invention, it is possible to prevent the water from flowing into the terminal portion by riding the wire by providing a fixing portion that can fix the wire at a position lower than the terminal of the pump motor.

Further, the present invention is effective in preventing the wire from being detached from the terminal of the pump motor by allowing the terminal protective cover to support one side of the wire.

The present invention is not limited to the above-described embodiment, and various modifications and variations of the present invention may be made without departing from the scope of the present invention. It will be understood by those skilled in the art that various changes may be made.

Claims (6)

The impeller, A pump motor for driving the impeller and having a terminal, A wire having a connection portion for connection with the terminal, A motor cover for covering the pump motor, And a terminal protective cover provided on the motor cover for protecting the terminal to prevent penetration of wash water into the terminal, Wherein the terminal protection cover supports one side of the wire to prevent the connection portion from being detached from the terminal. The drain pump according to claim 1, wherein the terminal protection cover is integrally formed with the motor cover, and is openable and closable at one side of the motor cover. The motor according to claim 1 or 2, wherein one of the terminal protection cover and the motor cover is formed with a hook and the other is formed with a rib to engage the terminal cover and the motor cover. . delete The drain pump according to claim 1, wherein the motor cover is provided with a fixing portion so that the wire can be fixed upward toward the terminal. In a washing machine including a drain pump, The impeller, A pump motor for driving the impeller and having a terminal, A wire having a connection portion for connection with the terminal,  A motor cover for covering the pump motor, And a terminal protective cover provided on the motor cover for protecting the terminal to prevent penetration of wash water into the terminal, Wherein the terminal protection cover supports one side of the wire to prevent the connection portion from being detached from the terminal.

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