KR19980010170U - dish washer - Google Patents

Abstract

The present invention relates to a dishwasher, and to a backflow preventing body for preventing backflow of washing water to be drained.

The dishwasher according to the present invention is provided on the main body 10 having a drain impeller 13 for forcibly pumping the washing water used for washing therein and provided on the drain flow passage to counter current when the pumping operation of the drain impeller 13 is completed. It is provided with a backflow prevention device 50 for blocking the wash water on the drain flow passage. The non-return device 50 includes a valve case 51 having an inlet 56 and an outlet 57 opened in the underground direction, and a valve cover 52 coupled to the valve case 51. The inlet port 56 is provided with a ball valve 55 having a predetermined weight so as to rise by the water pressure of the forced water to open the inlet port 56, and when the water pressure is removed to close the inlet port 56 by its own weight. .

Since the backflow prevention device of the dishwasher can more completely block backwashing water, the hygienic state of the dishwasher can be better maintained. And since there are few wear parts due to its operation, its use is almost semi-permanent, and operation reliability is also excellent.

Description

dish washer

The present invention relates to a dishwasher, and more particularly to a backwash prevention device of the dishwasher to prevent the backflow of the washing water is drained.

In general, the dishwasher is a device that automatically cleans the dishes by pre-programming the washing, rinsing, draining and drying operations into the microcomputer of the control unit and configuring the program to selectively control the washing operation.

1 and 2, the dish washing machine having such a function is composed of a washing tank 11, a washing impeller 12, and a drain impeller 13 built in the main body 10. As shown in FIG.

The upper injection nozzle 16 for washing the dishes by spraying the washing water onto the upper basket 14 and the lower basket 15 and the upper and lower baskets 14 and 15 so as to seat the dishes in the washing tank 11. ) And the lower injection nozzle 17 is rotatably provided, and a water supply valve 23 is installed at one end of the water supply hose 18 outside the cleaning tank 11 to control the supply of the washing water.

The water supply hose 18 extends from the water supply valve and is installed to penetrate the middle portion of the washing tank 11 to supply the washing water to the washing tank 11.

In addition, the drain impeller 13 is installed under the washing tank 11, and the drain hose 13 is connected to the discharge port, and is driven during the dish washing or when the washing is completed to discharge the washing water to the outside of the main body 10.

In addition, the washing impeller 12 is also installed at the bottom of the washing tank 11, it is configured in the sump (sump case) 20 for fresh water. At this time, the discharge port of the washing impeller 12 is connected to the connection pipe of the lower injection nozzle 17 and at the same time is connected to the washing water pipe 22 for supplying the washing water to the upper injection nozzle 16, washing water pipe 22 Extends from the discharge port of the washing impeller 12 to the upper end of the washing tank 11 and is again penetrated into the washing tank 11.

On the other hand, one side of the drain hose 19 is provided with a wash water backflow prevention device 30 to prevent the backflow of the new spinal water is drained. 3 is a cross-sectional view showing a non-return device of the conventional dishwasher. As shown therein, the washing water backflow prevention device 30 is provided such that the valve case 31 and the valve cover 32 are coupled by screws 33, and the valve case 31 has an inlet 34 and an outlet of the washing water. 35 is formed. And inside the valve case 31, a plate-shaped check valve 36 is hinged so that the discharged washing water is not flowed back. The check valve 36 is opened when the washing water flows in, and when the inflow of the washing water ends, the check valve 36 is pushed by the weight of the valve 36 and the load of the washing water to close the inlet 34 of the valve case 31.

The operation of the dishwasher configured as described above is as follows.

First, when power is applied to the water supply valve 11 under the control of the microcomputer (not shown) while the external water tap is open, the solenoid (not shown) in the water supply valve 11 operates to supply the water supply valve ( 11) the washing water is introduced into the washing tank 11 through the opening, and when the water level in the washing tank 11 reaches an appropriate level, the water supply valve is blocked to stop the water supply.

In addition, since the washing impeller 12 is operated, the washing water is supplied to the upper and lower portions of the washing tank 11 by the pumping force of the washing impeller 12.

That is, some of the washing water supplied to the upper portion of the washing tank 11 through the washing water pipe 10 is sprayed to the upper portion of the upper basket 14, and the rest of the washing water to the water column 24 is assembled to the upper basket 14 It is supplied and sprayed up and down while rotating the upper injection nozzle (16). In addition, the washing water supplied to the lower portion of the washing tank 11 through the connecting pipe is sprayed to the lower basket 15 while rotating the lower part nozzle (17).

Meanwhile, the washing water sprayed from the upper jet nozzle 16 and the lower jet nozzle 17 washes the dishes contained in the upper and lower baskets 14 and 15, and is collected into the sump case 20 and is again washed with an impeller. It is recycled by the pumping force of (12).

At this time, the detergent is automatically input from the detergent inlet (not shown) under the control of the microcomputer, and the rinse is automatically input through the microcomputer control even before the end of the rinse stroke. Subsequently, when the washing and rinsing stroke is completed, the drain impeller 13 is operated so that the washing water is discharged to the outside of the main body 10 through the drain hose 19, and the drying process is performed to wash the dishes. The over rinsing, draining and drying strokes are all controlled by the microcomputer.

The washing water backflow prevention device 30 provided while forming a part of the drainage flow path in such a drainage stroke is closed by external pressure applied by the washing water in which the plate-shaped check valve 36 is flowed back, wherein a part of the washing water is checked. Part of the washing water inlet 34 before closing (36) is to be introduced into the wash case sump 20 of the dishwasher, thereby causing a sanitary problem inside the dishwasher. In addition, if the durability decreases due to the repeated opening and closing of the check valve 36, a problem occurs in the operational reliability of the check valve 36.

The present invention is to solve the above problems,

The purpose of the present invention is to completely prevent the washing water flowing back to the sump case inside the dishwasher when the driving of the drain impeller is finished, and also to make the service life almost semi-permanent so that the reliability of its use is ensured. It is to provide a dishwasher equipped with an improved washing water backflow prevention device.

1 is a side cross-sectional view schematically showing the internal structure of a typical dishwasher.

Figure 2 is a perspective view of the bottom of the conventional dishwasher.

3 is a cross-sectional view showing a drainage backflow prevention device of a conventional dishwasher.

Figure 4 is a perspective view of the dishwasher according to the present invention.

5 is a cross-sectional view showing a drainage backflow prevention device of the dishwasher according to the present invention.

6 is an operating state diagram showing the drainage of the drain backflow prevention apparatus according to the present invention.

7 is an operation state diagram showing a backflow prevention state of the drainage backflow prevention device according to the present invention.

* Description of Signs of Main Parts

10 ... body 11 ... cleaning tank

12 ... washing impeller 13 ... draining impeller

14 ... upper basket 15 ... bottom basket

18 Water supply hose 19 Water drain hose

50.Return prevention device 54 ... Blocking rod

55.Ball valve 56.Inlet

In order to achieve this object, the present invention is a main body having a drain impeller for forcibly pumping the wash water used for washing therein, a drain oil for guiding the wash water pumped in communication with the drain impeller to the outside, The dishwasher is provided with a backflow prevention device for blocking the backwashing water on the drainage flow path when the pumping operation of the drain impeller is finished, the backflow prevention device is a valve case and a valve case having an inlet and an outlet opening in the underground direction It is provided with a valve cover coupled to the inlet side of the valve case, by the pumping force of the drain impeller rises by the water pressure of the washing water forced to open the inlet opening, when the drain impeller stops closing the inlet by its own weight It is characterized in that the ball valve having a predetermined weight so as to be provided.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment according to the present invention in detail. Figure 4 is a perspective view showing a dish washer according to the present invention, Figure 5 is a cross-sectional view showing a washing water backflow prevention device according to the present invention. (The same parts as in the prior art refer to Figs. 1 and 2). As shown, the dishwasher according to the present invention is a washing tank 11 for washing dishes in the main body 10 and washing for supplying the washing water to the dishes. The impeller 12 is largely composed of a drain impeller 13 for forcibly draining the washed water.

The inside of the washing tank 11 is provided with an upper basket 14 and a lower basket 15 to seat dishes, and the upper and lower baskets 14 and 15 to wash the dishes by spraying the washing water on the upper and lower baskets 14 and 15. The injection nozzle 16 and the lower injection nozzle 17 are rotatably provided. The water supply valve 23 is connected to one end of the water supply hose 18 outside the cleaning tank 11 so as to control the supply of the washing water. The water supply hose 18 extends from the water supply valve 23 and is installed to penetrate the middle portion of the washing tank 11 to supply the washing water to the washing tank 11.

Further, the drain impeller 13 is installed under the washing tank 11 and the drain hose 13 is connected to the discharge port, so that the drain impeller 13 is driven during the dish washing or when the washing is completed to drive the washing water into the main body ( 10) It is prepared to be discharged to the outside. In addition, the drain hose () is provided with a wash water backflow prevention device (50) to prevent the washing water to be drained again when the operation of the drain impeller 13 is completed, in addition to the structure of the drain hose (19) is a washing tank (11) It is provided in a structure extending downward from the bottom of the bottom) is communicated to the discharge port in the lower portion of the washing tank (11). This is an arrangement structure provided to prevent the washing water backflow to some extent not only as the backflow prevention device 50 but also as a structure of the drain hose 19.

The washing impeller 12 is also installed at the bottom of the washing tank 11 similarly to the drain impeller 13, and is installed in a sump case 20 for fresh water. At this time, the discharge port of the washing impeller 12 is connected to the connection pipe of the lower injection nozzle 17 and at the same time is connected to the washing water pipe 22 for supplying the washing water to the upper injection nozzle 16, washing water pipe 22 Extends from the discharge port of the washing impeller 12 to the upper end of the washing tank 11 and is again penetrated into the washing tank 11.

On the other hand, with reference to the drawings with respect to the operation of the washing water backflow prevention device according to the present invention will be described in more detail. 6 is an operational state diagram showing the drainage of the drain backflow prevention apparatus according to the present invention, Figure 7 is an operational state diagram showing a backflow prevention state of the drainage backflow prevention apparatus according to the present invention.

As shown therein, the wash water backflow prevention device 50 is provided with a valve case 51 and a valve cover 52, a screw coupling protrusion on the valve case 51, and a screw coupling hole on the valve cover 52. It is provided so that each is coupled by a screw 53, the valve case 51 is formed with the inlet port 56 and the outlet port 57 of the washing water. The inlet 56 and the discharge port 57 are open in the underground direction, so that the drain hose 19 communicated with the discharge port 57 is bent once more to be coupled thereto and extends above the main body 10. It is. Inside the valve case 51, a ball valve 55, which is located at the inlet 56 so that the discharged washing water does not flow back, is larger than the diameter of the inlet 56, is seated. Where 55 is seated, a packing 58 for sealing the seating portion of the inlet 56 and the ball valve 55 is coupled. The packing 58 has a radially enlarged upper diameter so that the ball valve 55 can be easily seated. In addition, in the valve case 51, the inner diameter of each flow path is divided by dividing the flow path inside the valve case 51 into two so as to prevent the ball valve 55 from escaping from the inlet port 56 side to the discharge port 57 side. A ball valve 55 detachment prevention rod 54 is provided to reduce the diameter of the ball valve 55 smaller than the diameter of the ball valve 55, and the valve case 51 is provided by the hydraulic pressure of the washing water in which the ball valve 55 is pumped by the drain impeller 13. The discharge port 57 is not separated from the discharge port 57.

Referring to the operation of the dishwasher according to the present invention configured as described above are as follows.

First, when power is applied to the water supply valve 11 under the control of the microcomputer (not shown) while the external water tap is open, the solenoid (not shown) in the water supply valve 11 operates to supply the water supply valve ( 11) the washing water is introduced into the washing tank 11 through the opening, and when the water level of the sump case 20 in the washing tank 11 reaches an appropriate level, the water supply valve 11 is blocked to stop the water supply.

As the washing impeller 12 is operated, the washing water is forcibly pumped by the pumping force of the washing impeller 12 and supplied to the upper and lower parts of the washing tank 11 by the injection nozzle.

That is, some of the washing water supplied to the upper portion of the washing tank 11 through the washing water pipe 10 is sprayed to the upper portion of the upper basket (), and the remaining portion is supplied to the water column 24 assembled to the upper basket 14. The nozzle is sprayed up and down while rotating the upper injection nozzle 16. In addition, the washing water supplied to the lower portion of the washing tank 11 through the connecting pipe is sprayed to the lower basket 15 while rotating the lower part nozzle (17).

Meanwhile, the washing water sprayed from the upper jet nozzle 16 and the lower jet nozzle 17 washes the dishes contained in the upper and lower baskets 15 and 16, and is collected into the sump case 20, and the washing impeller again. It is recycled by the pumping force of (12).

At this time, the detergent is automatically input from the detergent inlet (not shown) under the control of the microcomputer, and the rinse is automatically input through the microcomputer control before the end of the rinsing stroke. Subsequently, when the washing and rinsing stroke is completed, the drain impeller 13 is operated so that the washing water is forcibly pumped to the drain hose 19. The pumped washing water is introduced into the washing water backflow prevention device 50 through the drain hose 19, and the introduced washing water raises the ball valve 55 due to its pumping force reaching the ball valve 55. Accordingly, the inlet 56 of the valve case 51 is opened so that the washing water is introduced into the valve case 51, and the washing water introduced continuously is discharged to the outside through the outlet 57 of the valve case 51. do. When the driving of the drain impeller 13 stops, the pumping force disappears according to the washing water, and at the same time, the ball valve 55 descends due to its own weight. The lowered ball valve 55 is guided by the peking 58 to close the inlet 56 of the valve case 51.

And the drying administration proceeds to complete the washing of the dishes, such washing and rinsing, drainage and drying stroke are all controlled by the microcomputer.

Since the backflow prevention device of the dishwasher can more completely block backwashing water, the hygienic state of the dishwasher can be better maintained. And since there are few wear parts due to its operation, its use is almost semi-permanent, and there is also an excellent reliability.

Claims (3)

The main body having a drain impeller for forcibly pumping the wash water used for washing therein, a drain flow path for guiding the wash water pumped in communication with the drain impeller to the outside, the pumping operation of the drain impeller is provided on the drain flow path In the dishwasher provided with a backflow prevention device for blocking the backwashing water on the drain flow path when the end is finished, the backflow prevention device 50 is a valve case having an inlet 56 and a discharge port 57 opened in the underground direction ( 51) and a valve cover 52 coupled to the valve case 51, and the inlet port 56 inside the valve case 51 has the inlet port 56 of the washing water forcibly introduced by the pumping force of the drain impeller 13; The ball valve 55 having a predetermined weight is closed so as to rise by the water pressure to open the inlet 56, and when the drain impeller 13 stops, the inlet 56 is closed by its own weight. The dishwasher of claim. The dishwasher according to claim 1, wherein a packing (58) for sealing the ball valve is provided at a place where the ball valve (55) is seated and in contact with the inlet (56). 3. The method of claim 1, wherein the ball valve 55 is prevented from escaping toward the discharge port 57 at an intermediate portion of the discharge port 57 and the inlet port 56 in the valve case 51. The dishwasher according to claim 1, wherein the ball valve separation prevention rod is provided.