KR19990040591A - Backflow check valve of dishwasher - Google Patents

Abstract

The present invention relates to a non-return valve of a dishwasher, and in the related art, a rubber stopper installed to prevent a reverse flow of contaminated water was not able to completely prevent leakage, and in the structure of opening and closing a flow path using a ball, it can be applied only to a vertical flow path. The backflow prevention valve of the dishwasher of the present invention is coupled to a stopper formed inside the flow path to prevent the contaminated water from being discharged by its own weight as a rubber stopper that rotates only when the contaminated water is discharged. Due to the opening and closing, it can be applied to both the horizontal flow path and the vertical flow path, but 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 to open and close the valve by rotating a portion of the stopper body 12b and the edge 12a connected back and forth slightly in a state where 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.

5A to 5B are vertical cross-sectional views illustrating a non-return valve using a conventional ball, and an outlet passage 22 for discharging the polluted water is coupled to an upper end of the inlet passage 20 through which the polluted water is introduced. A rubber member 23 having an orifice 23a is fitted at the 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. When the contaminated water is drained, a ball 21 is inserted to open the orifice 23a by the hydraulic pressure of the contaminated water and to block the orifice 23a by its own weight when drainage is completed.

The inflow passage 20 is installed in the vertical direction, and the outflow passage 21 is a ball so that the contaminated water passing through the orifice 23a can be discharged to one side after moving the ball 21 upward. A blower outlet 24 having a smaller size than the aperture of 21 is formed on one side.

When draining 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 is contaminated upward. The 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 case of using the rubber stopper 12 of the non-return valve of the conventional dishwasher as described above, the valve is opened and closed slightly by back and forth by its own elastic force at the portion where the stopper body 12b and the edge 12a are connected. Even if the inflow passage 10 and the outflow passage 11 are not precisely matched, the rubber plug 12 should be closed 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.

In addition, in the structure of the non-return valve using the ball 21, the ball 21 opens and closes the flow path 20 by vertically moving up and down, so that it can be applied only to the flow path 20 in the vertical direction. Supplementation has been required.

Accordingly, the present invention has been devised in view of the above problems, and can be applied to both horizontal flow paths and vertical flow paths, and it is possible to completely prevent leakage phenomenon even with a relatively large matching error in coupling between the non-return valves. It is an object of the present invention to provide a non-return valve of a dishwasher.

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.

Fig. 5A is a longitudinal sectional view showing a non-return valve using a conventional ball, showing a drainage time.

Fig. 5B is a longitudinal sectional view showing a non-return valve using a conventional ball, showing when drainage is completed.

Figure 6a is a longitudinal sectional view showing a non-return valve of the present invention, a view showing when draining.

Figure 6b is a longitudinal sectional view showing a non-return valve of the present invention, when the drainage is completed.

7 is a front view showing a rubber stopper of the present invention.

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

30; Inlet flow path 31; Outflow

32; Rubber stopper 33; Rubber stopper

33a; Axis 33b; Stopper

In order to achieve the above object, the present invention provides an inflow passage into which contaminated water is washed, an outflow passage coupled to the inflow passage to discharge the contaminated water, and a portion of the combined inflow passage and the outflow passage. The rubber stopper formed on the upper side and one end thereof are rotatably coupled to the rubber stopper to rotate to the outflow channel side when the contaminated water is discharged, and when the backflow of the contaminated water flows, the inflow path is blocked by its own weight to contaminate the contaminated water. There is provided a non-return valve of the dishwasher, characterized in that consisting of a rubber stopper to prevent the reverse flow of.

The rubber stopper is characterized in that it is composed of a circular stopper body of the size coupled to the axis of rotation when the rubber stopper is coupled to the rubber stopper, and connected to this axis to block the inflow passage.

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

As shown in FIG. 6A, the non-return valve of the dishwasher of the present invention is coupled to an inflow passage 31 for discharging the contaminated water into an inflow passage 30 into which the contaminated water which has been cleaned is introduced. A rubber stopper 32 is formed at an end of the inflow passage 30 above the portion where the inflow passage 30 and the outflow passage 31 are coupled, and the rubber stopper 32 discharges the contaminated water. At the time of opening to the outlet flow path 31 and the reverse flow of the contaminated water, the rubber stopper 33 is rotatably coupled to prevent the back flow of the contaminated water by blocking the inflow passage 30 by its own weight.

As shown in FIG. 7, the rubber stopper 33 is coupled to the rubber stopper 32 so that the rubber stopper 33 rotates as a center of rotation when the rubber stopper 33 rotates and the shaft 33a. It is composed of a circular plug body (33b) of the size that is connected to block the inflow passage (30).

The rubber stopper 32 has a shape in which grooves into which both ends of the shaft 33a can be inserted are formed, and the groove is formed to a size that can be freely rotated in a state in which the shaft 33a is coupled. have.

The shaft 33a has a semicircular cross-sectional shape so that the stopper body 33b does not contact the end surface of the inflow passage 30 when the stopper body 33b contacts the inflow passage 30 and blocks the inflow passage 30. It is.

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

As the drainage proceeds, the water flowing through the inflow passage 30 pushes the rubber stopper 33, and as shown in FIG. 6A, the stopper body 33b rotates around the shaft 33a toward the outflow passage 31 to provide rubber. The stopper 33 is opened.

When the drainage is finished, the rubber stopper 33 that is pushed rotates to the inflow passage 30 by its own weight and blocks the inflow passage 30.

The pressure generated as the contaminated water flows back through the check valve at the same time as the drainage is finished, is compressed by pushing the rubber stopper 33 to the contact point of the inflow passage 30, as shown in FIG.

However, when the rubber stopper 33 of the present invention receives the pressing force of the contaminated water flowing back, the inflow passage 30 is more firmly blocked, thereby preventing the phenomenon of leakage.

In addition, since the rubber stopper 33 of the present invention can move freely while the shaft 33a is constrained to the groove, the rubber stopper 33 is easily located at the contact point even if the position of the shaft 33a is not relatively accurate. There is an advantage that can be compressed.

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 (3)

An inlet flow passage into which the contaminated water which has been washed is introduced, an outflow passage coupled to the inflow passage to discharge the contaminated water, a rubber stopper formed at an upper side of a portion where the inflow passage and the outflow passage are combined, and the rubber stopper One end is rotatably coupled to the hook is rotated toward the outflow channel side when the polluted water is discharged, and when the backflow of the polluted water is blocked, it is composed of a rubber stopper to prevent the backflow of the polluted water by blocking the inflow passage by its own weight Check valve for dishwashers. According to claim 1, wherein the rubber stopper is composed of a shaft which is coupled to the rubber stopper to the center of rotation when the rubber stopper rotates, and a circular stopper body of the size connected to the shaft to block the inflow passage Non-return valve of the dishwasher, characterized in that the. 3. The backwash prevention valve of claim 2, wherein the shaft has a semicircular cross-sectional shape so that the contaminated water flows back and does not touch the end surface of the inflow passage when the rubber stopper is pressed against the inflow passage.