KR100246413B1 - Valve for preventing backward flow of dish washer - Google Patents

Abstract

The present invention relates to a non-return valve of a dishwasher, and the conventional non-return valve has a disadvantage in that a rubber stopper installed in the drainage passage does not completely block the drainage passage so as to prevent backflow of contaminated water. , The non-return valve of the dishwasher of the present invention inserts the ball into the drain flow path through which the contaminated water is discharged, and when the water is drained, the ball moves upward by the flow of the contaminated water passing through the flow path to open the flow path and the ball is drained. By blocking the flow path by this weight, it is possible to completely prevent the leakage phenomenon.

Description

Backflow check valve of dishwasher

The present invention relates to a dishwasher, and more particularly, to a non-return valve of a dishwasher for preventing the drained contaminated water from being re-introduced into the dishwasher.

In general, the dishwasher, as shown in Figure 1, the sump (2) containing the wash water for washing the dishes, wash water to suck the wash water from the thumb (2) to perform the washing process A washing pump (1) for supplying, an upper arm (3) and a lower arm (4) connected to the washing pump (1), which suck the washing water and spray the washing water to the tableware, and a tub that becomes a space for washing the dishes. a tub (5), a filter (6) attached to the thumb (2) for filtering dirt, and a drain pump (7) for discharging the washed water which has been cleaned.

The drain pump 7 is equipped with a non-return valve 8 for preventing the discharged washing water from re-introducing, and a drain passage 9 is provided to discharge the wash water passing through the non-return valve 8. .

Referring to the operation of the dishwasher having the above configuration as follows.

When the dishwasher starts, a solenoid valve (not shown) is opened to block the water flow passage (not shown), and water is supplied to the dishwasher.

After the water supply is made, the washing pump (1) is operated so that the washing water is sucked into the washing pump (1) through an inlet connected to the thumb (2), and the pressure is increased to the upper arm (3) and the lower arm (4). It is supplied and sprayed into the tableware.

The washing water sprayed on the dishes falls on the bottom of the tub 5 together with the dirt of the dishes, and the washing water dropped to the tub 5 flows into the thumb 2 and passes through the filter 6 to the washing pump 1 again. Is inhaled.

This washing procedure is repeated to form a closed circuit, and when the washing is completed, the drain pump 7 operates to filter the dirts filtered by the filter 6 through the non-return valve 8 together with the dirty water and the drain flow path 9. Drain out of the dishwasher through.

When the drainage is finished and the operation of the drain pump 7 is stopped, the non-return valve 8 prevents the contaminated water that has not escaped from the drainage passage 9 into the dishwasher.

2 is a longitudinal cross-sectional view showing a structure of a conventional non-return valve, the conventional non-return valve 8 is a rubber stopper between the inflow passage 10 through which the contaminated water flows in and the outflow passage 11 coupled thereto. This is a method of positioning and combining (12).

3 is a front view illustrating a conventional rubber stopper, wherein the rubber stopper 12 has a ring-shaped edge 12a and one end connected to the inner side of the edge 12a to connect the inflow passage 10. It is composed of a plug body (12b) of a circular plate to prevent it.

The rubber stopper 12 is inserted between the outlet passage 11 and the inlet passage 10 and is fixed by pressing the edge 12a to the outlet passage 11 and the inlet passage 10.

The rubber stopper 12 as described above is opened and closed by slightly rotating the front and rear portions such that the stopper body 12b and the edge 12a are connected to each other in a state in which the edge 12a is fixed.

When the drainage proceeds, the rubber stopper 12 of the non-return valve 8 is opened by rotating the stopper body 12b by the pressure of the water, and after the drainage is completed, the rubber stopper 12 by the pressure of the water flowing back. ) Stays closed.

The non-return valve of the conventional dishwasher as described above flows back and forth slightly by its elastic force at the portion where the stopper body 12b and the rim 12a are connected, so that the valve 8 is opened and closed, so that the inflow passage 10 and the outlet Even if the matching of the flow path 11 is not accurate, in the case where the rubber stopper 12 is closed, it should be possible to prevent leakage from the outflow passage 11 to the inflow passage 10.

However, it is not easy to maintain a molding error that can completely prevent leakage due to the flexibility of the rubber stopper 12.

4A to 4B show that when the matching error is large, the upper end or the lower end of the rubber stopper 12 may not be in perfect contact with the inflow passage 10, and a gap may occur, causing leakage.

Accordingly, the present invention has been made in view of the above problems, and provides a backwash prevention valve of a dish washer that can completely prevent leakage even with a relatively large matching error in coupling between the backflow prevention valves. There is a purpose.

1 is a longitudinal sectional view showing the configuration of a general dish washer.

Figure 2 is a longitudinal sectional view showing an example of a conventional non-return valve.

Figure 3 is a front view showing a conventional rubber stopper.

Figure 4a is a longitudinal sectional view showing an example of leaking the conventional non-return valve.

Figure 4b is a longitudinal cross-sectional view showing another example of a conventional non-return valve is leaking.

Figure 5a is a longitudinal sectional view showing a non-return valve of the present invention, a view showing when draining.

Fig. 5B is a longitudinal sectional view showing the non-return valve of the present invention, showing when the drainage is completed.

Figure 6 illustrates a method of determining the size of the ball and the diameter of the orifice in the non-return valve of the present invention.

Figure 7a is a longitudinal sectional view showing another embodiment of the present invention, a view showing the drainage time.

7B is a longitudinal sectional view showing another embodiment of the present invention, showing when the drainage is completed.

(Explanation of symbols for the main parts of the drawing)

20; Inflow channel 21; ball

22; Outflow channel 23; Rubber member

23a; Orifice 24; vent

30; Absence 31; negative

32; Guide shaft

In order to achieve the above object, the present invention provides an inflow passage into which contaminated water is washed, an outflow passage combined with the inflow passage to discharge the contaminated water, and a drainage state inserted into the outflow passage. There is provided a backwash prevention valve of the dishwasher, comprising a structure mounted on the end of the inflow passage so as to open the inflow passage by water pressure of the contaminated water and block the inflow passage by its own weight when drainage is completed. .

The inflow passage is formed vertically to discharge the contaminated water in a vertical direction.

In addition, the end of the inflow passage is characterized in that the rubber member formed with an orifice is fitted.

The structure is preferably in the shape of a spherical ball.

Hereinafter, with reference to the accompanying drawings, the non-return valve of the dishwasher of the present invention will be described in detail.

5A to 5B, the backflow prevention valve of the dishwasher includes an outflow passage 22 for discharging the contaminated water at an upper end of the inflow passage 20 through which the contaminated water which has been cleaned is introduced. A rubber member 23 having an orifice 23a is fitted at an end of the inflow passage 20 among the portions in which the inflow passage 20 and the outflow passage 22 are coupled to each other. A ball 21 is inserted into the 22 to open the orifice 23a by the hydraulic pressure of the contaminated water when the contaminated water is drained, and to close the orifice 23a by its own weight when the drained water is finished.

The inflow passage 20 and the outflow passage 22 are the ball 21 is moving up and down normally, or after the draining is finished, the ball 21 is blocking the orifice 23a by its own weight and only when the ball is drained Since the orifice 23a must be moved to open the orifice 23a, the inflow passage 20 should have a shape formed at a predetermined angle, and the inflow passage 20 of the non-return valve provided as an embodiment of the present invention. ) Is a shape that is first bent vertically at one end coupled to the dishwasher body and then coupled to the outflow passage 21.

The outlet flow passage 21 has a spout 24 having a smaller size than the diameter of the ball 21 so that the contaminated water passing through the orifice 23a can be moved to one side after moving the ball 21 upward. It is formed on one side.

Therefore, the ball 21 inserted into the outflow passage 21 is movable up and down, but is not discharged to the outside when the polluted water is discharged.

In addition, the upper surface on which the ball 21 of the rubber member 23 is placed has a shape protruding slightly along the circumferential surface forming the orifice 23a.

Referring to the operation of the non-return valve of the dishwasher having the above configuration as follows.

First, when drainage is started, the ball 21 placed on the rubber member 23 is moved upward by the water pressure of the contaminated water passing through the orifice 23a by the operation of the drainage pump. And the contaminated water passes out after passing through the spout 24.

When the drainage pump is stopped and the drainage pump stops as shown in FIG. 5B, the ball 21 that has moved to the upper portion returns to its own weight to block the orifice 23a, and the contaminated water remaining in the outflow passage 22 is dished out. Prevents reflow into the washer.

In the method of assembling the non-return valve of the present invention, the rubber member 23 is sandwiched between the inflow passage 20 and the outflow passage 22 in a state in which the ball 21 is inserted into the outlet passage 22 in both directions. By pressing together.

At this time, even if the matching between the outflow passage 22, the inflow passage 20 and the rubber member 23 is not relatively accurate, the ball 21 used in the present invention is a stopper body 12b in the conventional rubber stopper 12 Since the same axis as the connecting portion of the edge 12a does not exist, there is no restriction in the movement of the ball 21 and the orifice 23a can be tightly blocked.

6 is a longitudinal sectional view showing a method of determining the size of the ball and the diameter of the orifice in the non-return valve of the present invention, the center of the ball 21 and the orifice 23a in contact with the ball 21. The size of the ball 21 and the diameter of the orifice 23a should be determined within a range where the distance d between the circumferential surfaces is sufficiently large so that when the operation of the drain pump stops, the ball 21 is orifice 23a. To return immediately.

7A to 7B are longitudinal cross-sectional views showing another embodiment of the present invention, in which a member 30 capable of blocking the orifice 23a is used instead of the ball 21.

The member 30 has a disk 31 having a size capable of blocking the orifice 23a at one end thereof, and a rear surface of the disk 31 is provided at the orifice 23a according to the flow of the contaminated water. The guide shaft 32, which can move up and down in the fitted state, is integrally formed.

Referring to the operation of the non-return valve using the member 30 as described above are as follows.

First, when the drainage is started, the disc 31 is moved upward by the water pressure of the contaminated water discharged.

After draining, the member 30 moves downward while the guide shaft 32 is inserted into the orifice 23a. Thus, the disc 31 blocks the orifice 23a. Inflow can be prevented.

At this time, when the pressing force of the contaminated water flows back to the orifice (23a) even more firmly it is possible to prevent the phenomenon of leakage.

In addition, since the member 30 can move freely while the guide shaft 32 is constrained to the orifice 23a, the disc 31 is easily orifice (even if the position of the guide shaft 32 is not relatively accurate). There is an advantage that can be compressed to 23a).

In general, the dishwasher repeats watering and draining several times from the beginning to the end.

In other words, clean washing is performed by repeatedly changing the dirty contaminated water to clean water. If the check valve does not exist in the dishwasher, or if it does not work properly and leaks, clean water is drained while water is being supplied. Some dirty contaminated water is re-introduced into the dishwasher to contaminate the clean water supplied in advance.

The present invention can completely prevent the phenomenon of drained contaminated water to be re-introduced to reduce the number of times of drainage / drainage, reduce the amount of water used in the dishwasher once more, and can perform a cleaner cleaning, which remains inside the dishwasher after washing By reducing the amount of water remaining there is an effect to prevent the discomfort of the user and to prevent odor that may occur when the dishwasher is not used for a long time.

Claims (5)

An inflow passage into which the contaminated water which has been washed is introduced; an outflow passage coupled with the inflow passage to discharge the contaminated water; and when the drainage is inserted into the outflow passage, the inflow passage is discharged by water pressure of the contaminated water. Opening and draining the backflow prevention valve of the dishwasher, characterized in that it is composed of a structure which is mounted on the end of the inflow passage so as to block the inflow passage by its own weight. The check valve of claim 1, wherein the inflow passage is formed vertically to discharge the contaminated water in a vertical direction. The check valve of claim 1, wherein an orifice-shaped rubber member is fitted to an end of the inflow passage. The check valve of claim 1, wherein the structure is a spherical ball. According to claim 1, wherein the structure is formed at the end of the disk size that can block the orifice, the back of the disk guide shaft which can move up and down in the state fitted to the orifice in accordance with the flow of the contaminated water Non-return valve of the dishwasher, characterized in that formed integrally.

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