KR20100086621A - Drumtype washing machine - Google Patents

Abstract

PURPOSE: A drum washing machine is provided to prevent water from flowing backward through a drain pump and an U shaped connector and flowing again into a tub and to effectively charge the remaining water from the tub. CONSTITUTION: A drum washing machine is composed of a tub, a drain pump, a drain hose, an U shaped connector(400) and a siphon brake(430). The drain pump discharges the water. The drain hose discharges the water pumped from the drain pump. The U shaped connector comprises an air inlet path. The U shaped connector connects the drain pump to the drain hose. The lower diameter of the siphon brake is smalls than its upper diameter.

Description

Drum washing machine {Drumtype washing machine}

The present invention relates to a drum washing machine, and more particularly, to a drum washing machine having a structure that can prevent the siphon phenomenon and the back flow of the washing water when the washing water discharged inside the tub.

Generally, a washing machine is a pulsator washing machine that is washed by water flow generated by rotating a pulsator inside a vertically installed drum, and washing water generated inside the drum by rotating a drum installed approximately horizontally. The washing machine may be classified into a drum washing machine for washing using a drop of laundry and friction force, and an agitator washing machine for washing using a rotation force of an agitator installed vertically.

Among them, the drum washing machine can reduce the overall height compared to the pulsator washing machine in which the washing drum is a vertical type, and there is an advantage in that problems such as twisting of clothes hardly occur.

In addition, unlike the pulsator washing machine, the drum washing machine can easily apply additional functions such as a drying function or a steam washing function used for washing by generating steam. By the way, such a drum washing machine is provided with a structure for preventing the odor generated by the residual water because the odor may be generated when the washing water used for washing in the washing state is passed.

1 is a schematic diagram of a drum washing machine having a conventional residual water discharge structure.

As shown in FIG. 1, the conventional drum washing machine has a drain pump 3 and a drain hose 4 for discharging residual water in the tub 2, a drain pump 3 and a drain hose 4. A U-shaped connector 5 for connecting between the two is provided.

Two connectors 7 are formed at the bottom of the U-shaped connector 5, one connected to the drain pump 3, the other to the drain hose 4, and the drain hose 4 is connected to the cabinet ( Discharge the wash water out of the washing machine through 1).

The siphon brake hose 9 connected to the upper side of the tub 2 is installed on the upper portion of the U-shaped connector 5 to prevent the siphon phenomenon due to the pressure difference outside the tub 2 and the washing machine.

However, in the conventional drum washing machine, when the drain pump is stopped, the wash water remaining in the connection pipe between the drain pump and the U-shaped connector flows back into the tub by flowing back the drain pump, or is reintroduced into the tub through the siphon brake hose. In some cases, there is a problem that smooth discharge of residual water is difficult.

An object of the present invention is to provide a drum washing machine having a structure that can prevent the siphon phenomenon and the reverse flow of the wash water when the wash water discharged inside the tub.

In order to achieve the above object, the present invention includes a tub for receiving wash water; A drain pump for draining the wash water; A drain hose for draining the pumped wash water from the drain pump; A U-shaped connector having an air suction passage and connecting the drain pump and the drain hose; And a siphon brake inserted into the air suction passage to allow the flow of air, the siphon brake having a lower diameter than the upper diameter thereof.

The siphon brake may include: a brake body inserted into the air suction passage; A support part formed at one end of the brake body and held in the air suction passage; It is formed to be inclined downward from the other end of the brake body characterized in that it comprises an elastic variable portion that allows the flow of air.

The elastic variable part is characterized in that the inner peripheral surface is in close contact with the flat form.

Said siphon brake is characterized in that it is made of an elastic material.

The brake body is characterized in that it further comprises a plurality of engaging projections protruding along the outer peripheral surface.

The air suction passage further includes a plurality of projection receiving grooves into which the locking projection is inserted into an inner circumferential surface thereof.

The drain hose includes: a cylindrical body inserted into an end of the drain hose; One end is coupled to the main body, the other end of the flap that is opened when the flow of the wash water; It is characterized in that it further comprises a backflow prevention member of an elastic material formed protruding along the inner circumferential surface of the main body and configured to support the flap.

The gap L between the flap supports is smaller than the length of the flap.

As described above, the drum washing machine according to an embodiment of the present invention may prevent the washing water from flowing back through the drain pump and the U-shaped connector as well as the siphon phenomenon when the washing water is discharged inside the tub. . Accordingly, the remaining water in the tub can be effectively drained, thereby preventing the generation of odors caused by the remaining water, which is hygienic, and has an effect of eliminating dissatisfaction elements of consumers.

Hereinafter, a drum washing machine according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Attached Figure 2 is a schematic view of a drum washing machine having a residual water discharge structure according to the present invention, Figure 3 is a perspective view showing the connection structure of the pump case and the drain hose according to the present invention, Figure 4 is a perspective view cut in accordance with Figure 3 to be. Figure 5 is a view showing the backflow prevention member according to Figure 4, Figure 6 is a perspective view showing a U-shaped connector according to the present invention, Figure 7 is a side view of the U-shaped connector according to FIG. FIG. 8 is a cross-sectional view taken along the line A-A of FIG. 7, and FIG. 9 is a cross-sectional view illustrating a state where the siphon brake according to FIG. 8 is coupled.

As shown in FIG. 2, the drum washing machine 10 according to an embodiment of the present invention is installed at the front of the cabinet 10 'and the cabinet 10' to form an exterior, and opens and closes the cabinet 10 '. A door 10 ″, a tub 100 installed inside the cabinet 10 ′ to store wash water, a drum 110 installed inside the tub 100 to accommodate laundry, and a tub ( A drain pump 220 for draining the wash water remaining in the tub 100 connected to the pump 100, a pump case 200 accommodating the same, and the wash water drained from the drain pump 220 are provided in the cabinet 10 ′. The drain hose 300 is discharged to the outside, and is provided between the drain pump 220 and the drain hose 300 is composed of a U-shaped connector 400 connecting the drain pump 220 and the drain hose 300.

The drum 110 is rotatably coupled to the inside of the tub 100, and the clothes accommodated therein are washed by the rotary drop motion. The water supplied by the water supply device (not shown) is used for washing, and the used wash water exits to the tub 100 through a plurality of through holes (not shown) formed through the drum 110.

If the remaining wash water remains in the tub 100 for a predetermined time or more, the hygiene may be degraded due to the smell and may cause consumer dissatisfaction. Thus, the wash water accumulated on the inner bottom of the tub 100 may be drained to the tub 100. It is preferable to quickly drain the tub 100 by the pump 220.

The drained wash water is drained to the outside of the cabinet 10 ′ via the drain hose 300 via the U-shaped connector 400.

As shown in FIGS. 4 and 6, an end portion connected to the drain pump 220 of the drain hose 300, and one side of the U-shaped connector 400, a backflow preventing member for preventing backflow of the washing water being drained. 320 and siphon brake 430 are inserted respectively.

As shown in FIGS. 1 and 3, the drain pump 220 is connected to the tub 100 and the U-shaped connector 400 while being coupled to the pump case 200.

As shown in Figure 3 to 5, the upper one side of the pump case 200, the cylindrical hose coupling portion 210 is formed projecting upward, the elbow 310 of the drain hose 300 is hose coupling portion 210 ) Is inserted.

The outer diameter of the hose coupling portion 210 is preferably formed to be slightly larger than the inner diameter of the elbow 310. Accordingly, when the elbow 310 is inserted into the hose coupling portion 210, the elbow 310 is randomly separated from the hose coupling portion 210 by interfering with the inner peripheral surface of the elbow 310 of the outer peripheral surface of the hose coupling portion 210. Can be prevented. That is, the hose coupling portion 210 and the elbow 310 is coupled in an interference fit manner (see interference portion of Figure 5).

As shown in FIG. 5, the backflow preventing member 320 is inserted into the elbow 310 coupled to the end of the drain hose 300. In the state in which the elbow 310 is inserted into the hose coupling portion 210, the lower end portion of the backflow prevention member 320 is installed to be in close contact with the end of the hose coupling portion 210.

The backflow prevention member 320 is made of an elastic material and supports the main body 322 inserted into the elbow 310, the flap 326 coupled to the upper portion of the main body 322, and the flap 326 from below. The flap support part 324 is comprised.

The main body 322 is formed in a cylindrical shape and has an inner diameter corresponding to the inner diameter of the hose coupling portion 210. The outer diameter of the main body 322 is formed to be somewhat larger than the inner diameter of the elbow 310 so that the outer peripheral surface of the main body 322 is coupled to the inner peripheral surface of the elbow 310 in an interference manner.

The flap 326 is made in the form of a convex lens that becomes narrower from the center portion to the edge. One end of the flap 326 is fixed to the upper one side of the body 322, the other end is not fixed to flow by the wash water.

The flap support 324 protrudes upward from the inner circumferential surface of the main body 322 toward the flap 326. The flap support 324 supports the flap 326 from below to prevent the flap 326 from flowing in the direction opposite to the moving direction of the wash water.

Therefore, the gap L between the flap support parts 324 is preferably smaller than the length of the flap 326.

6 to 8, the U-shaped connector 400 is a U-shaped pipe, which is actually installed in an inverted U-shape on the upper side of the drain pump 220. The U-shaped connector 400 has an air suction passage 420 is formed so that the air can be communicated to the upper side of the streamlined, the lower two connection pipes 410 are formed. One connection pipe 410 is connected to the drain pump 220 by the drain hose 300, the other connection pipe 410 is connected to the drain hose 300 in communication with the outside of the main body 322.

The air suction passage 420 has a cylindrical shape, and a siphon brake 430 is inserted into the siphon phenomenon to prevent backflow of the siphon phenomenon and the washing water.

A certain amount of residual water always remains in the drain hose 300 connecting the drain pump 220 and the U-shaped connector 400. When an air pressure difference occurs inside and outside the U-shaped connector 400, the residual pressure is caused by the siphon phenomenon. All water is discharged. Therefore, in order to prevent such a siphon phenomenon, a siphon brake 430 is provided to prevent the occurrence of a pressure difference inside and outside the U-shaped connector 400.

As illustrated in FIGS. 6 and 9, the siphon brake 430 allows the flow of air introduced from the outside of the air suction passage 420, and blocks the wash water flow from inside the U-shaped connector 400. do. That is, backflow of the wash water through the siphon brake 430 is prevented.

The siphon brake 430 includes a brake body 432, a support part 434 formed at one end of the brake body 432, an elastic variable part 436 formed at the other end of the brake body 432, and It is composed of a plurality of engaging projections 438 formed on the outer peripheral surface of the brake body 432.

The brake body 432 has a substantially cylindrical shape and has a diameter corresponding to the inner diameter of the air suction passage 420. However, the diameter of the lower part is smaller than the diameter of the upper part for easy formation of the opening part (to be described later). The brake body 432 has a plurality of locking protrusions 438 protruding outwardly in a ring shape along an outer circumferential surface thereof.

The locking protrusion 438 helps to maintain the installation position while the siphon brake 430 is inserted into the air suction passage 420. In order to seat the locking protrusion 438, a protrusion receiving groove 422 corresponding to the position and shape of the locking protrusion 438 is recessed on the inner circumferential surface of the air suction passage 420. The siphon brake 430 is fixed by the locking protrusion 438 being inserted into the protrusion receiving groove 422.

Alternatively, the locking protrusion 438 may be formed to interfere with the inner circumferential surface of the air suction passage 420 without forming a separate groove structure inside the air suction passage 420.

The support part 434 is formed at the upper end of the brake body 432 and protrudes outward along the edge. The lower surface of the protruding portion of the support portion 434 is installed to contact the upper end of the air suction passage 420.

Therefore, the brake body 432 is not inserted into the U-shaped connector 400 in a state where the brake body 432 is inserted into the air suction passage 420 by the support part 434. The siphon brake 430 may be stably installed without being randomly separated from the air suction passage 420 by the support 434 together with the above-described locking protrusion 438.

The elastic variable part 436 is formed at the lower end of the brake body 432 and is opened when air is introduced, and has a structure that blocks the flow in the direction opposite to the air flow direction. The elastic variable part 436 is formed to be inclined downward in both directions from the lower end of the brake body 432, and has a flat shape in which the inner circumferential surfaces of the inclined ends are in close contact with each other. This shape is similar to the air inlet of a whistle or recorder.

It is preferable that the elastic variable part 436 is made of an elastic material in order to be deformed temporarily by air pressure only upon inflow of air, and the entire siphon brake 430 may be made of an elastic material. .

When the operation of the drain pump 220 is stopped to form a negative pressure inside the U-shaped connector 400, the air outside the U-shaped connector 400 flows into the air suction passage 420, and the siphon brake 430 is caused by the air pressure. Is opened.

That is, the inner circumferential surface of the elastic variable portion 436 which is in close contact with each other by the air pressure is spaced apart to have a cylindrical shape to allow the flow of air. Air is introduced into the U-shaped connector 400 through the open space. When the air pressure difference between the inside and the outside of the U-shaped connector 400 is eliminated due to the inflow of air, and the inflow of the air is stopped, the opening part is restored to its original position by the restoring force, and the inner circumferential surface is in close contact with the siphon brake 430. ) Is closed.

In the drum washing machine according to an embodiment of the present invention having such a configuration, with reference to Figures 2 to 9 will be described the operation relationship of each part according to the drainage flow of the wash water and the flow of air.

First, looking at the flow of the wash water, when the washing stroke is performed in the drum 110, the wash water is supplied through the water supply apparatus, the wash water is accumulated in the inner bottom of the tub (100).

The wash water accumulated in the tub 100 is pumped by the drain pump 220 connected to the tub 100, and the pumped wash water is drain hose 300 through the hose coupling portion 210 formed in the pump case 200. Is transferred to.

At this time, the elbow 310 of the 'b' shape coupled to the end of the drain hose 300 is coupled to the hose coupling portion 210, the back flow prevention member to prevent the back flow of the wash water inside the elbow 310 320 is inserted.

When the U-shaped connector 400 is used, when the drainage pump 220 is stopped due to the siphon phenomenon, all of the wash water remaining between the U-shaped connector 400 and the drainage pump () is drained or the drainage pump 220 Can be counter flowed toward.

Therefore, to prevent this, the siphon brake 430 is installed on the U-shaped connector 400 to prevent the siphon phenomenon, and the backflow preventing member 320 is installed on the drain hose 300.

When the wash water is pumped toward the drain hose 300, the flap 326 of the backflow prevention member 320 may move in the flow direction of the wash water and thus open to allow the flow of the wash water.

However, since the flap 326 is supported by the flap support 324 so as not to move in the direction opposite to the flow direction of the wash water, even if the wash water flows backward, the wash water does not flow back into the drain pump 220.

The wash water pumped by the drain pump 220 is pumped through the elbow 310 to the U-shaped connector 400 via the drain hose 300. The wash water is drained to the outside of the main body 322 through the drain hose 300 communicated with the outside of the main body 322 through the U-shaped connector 400 on the upper side of the drain pump 220.

When a pressure difference occurs between the inside and the outside of the U-shaped connector 400 during the operation of the drum washing machine 10, air outside the U-shaped connector 400 flows into the air suction passage 420 by the pressure difference, and thus the siphon brake ( 430 is opened.

That is, air is introduced into the U-shaped connector 400 while the elastic variable parts 436 which are in close contact with each other by air pressure are opened. As the inflow of air eliminates the pressure difference between the inside and the outside of the U-shaped connector 400, it is possible to prevent the siphon phenomenon due to the pressure difference.

When the pressure difference is eliminated, since the elastic variable portion 436 of the siphon brake 430 is closed by the restoring force, the air suction passage 420 is closed so that the washing water is not drained through the siphon brake 430 during the circulation of the washing water. .

By such a principle, it is possible to prevent backflow of the washing water drained and to effectively drain the residual water inside the tub.

Meanwhile, the present invention is not limited to the above-described embodiments, and any person having ordinary skill in the art to which the present invention pertains may make various modifications without departing from the gist of the present invention as claimed in the claims. Of course, such changes will fall within the scope of the claims set forth.

1 is a schematic view of a drum washing machine having a conventional residual water discharge structure.

2 is a schematic view of a drum washing machine having a residual water discharge structure according to the present invention.

Figure 3 is a perspective view showing a connection structure of the pump case and the drain hose according to the present invention.

4 is a perspective view of the incision according to FIG. 3.

5 is a cross-sectional view according to FIG. 4.

Figure 6 is a cross-sectional view showing a backflow prevention member according to the present invention.

Figure 7 is a perspective view of the U-shaped connector according to the present invention.

8 is a side view of the U-shaped connector according to FIG. 7;

9 is a cross-sectional view taken along the line A-A of FIG.

10 is a cross-sectional view showing a state in which the siphon brake according to FIG. 9 is coupled;

* Explanation of symbols for the main parts of the drawings

10: drum washing machine 10 ': cabinet

10 '': Door 100: Tub

200: pump case 300: drain hose

310: elbow 320: backflow prevention member

322: main body 324: flap support

326: flap 400: U-shaped connector

410: connector 420: air suction passage

422: projection receiving groove 430: siphon brake

432: brake body 434: support

436: elastic variable portion 438: locking projection

Claims (8)

A tub containing wash water; A drain pump for draining the wash water; A drain hose for draining the pumped wash water from the drain pump; A U-shaped connector having an air suction passage and connecting the drain pump and the drain hose; And The drum washing machine is inserted into the air suction passage, but allows the flow of air, the drum washing machine comprising a siphon brake having a lower diameter than the upper diameter. The method of claim 1, The siphon brake is: A brake body inserted into the air suction passage; A support part formed at one end of the brake body and held in the air suction passage; Drum washing machine characterized in that it is formed to be inclined downward from the other end of the brake body to include an elastic variable to allow the flow of air. The method of claim 2, The elastic variable part drum washing machine, characterized in that the flat shape is in close contact with the inner peripheral surface. The method of claim 3, The siphon brake is a drum washing machine, characterized in that made of elastic material. The method of claim 2, The brake body further comprises a plurality of engaging projections protruding along the outer circumferential surface. The method of claim 5, The air suction passage further comprises a plurality of projection receiving grooves into which the locking projection is inserted into the inner circumferential surface of the drum washing machine. The method of claim 1, The drain hose is: A cylindrical body inserted into an end of the drain hose; One end is coupled to the main body, the other end of the flap that is opened when the flow of the wash water; And a backflow preventing member formed of a flap support portion protruding along the inner circumferential surface of the main body to support the flap. The method of claim 7, wherein Drum spacing (L) between the flap support is smaller than the length of the flap.

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