KR19980057987U - Dishwasher with check valve - Google Patents

Abstract

The present invention relates to a dish washer having a sump case, a drain pump for drawing and discharging drainage in the sump case, and a drain pipe providing a flow path for drainage from the drain pump, wherein the sump case and the drain pump are disposed between the sump case and the drain pump. And a check valve means installed on the flow path of the connection pipe providing the flow path to block the reverse flow of the drain. Thereby, it is possible to minimize the backflow of the drainage to greatly improve the washing performance, and to reduce the odor and bacteria propagation after the washing is completed can maintain the internal cleanliness.

Description

Dishwasher with check valve.

The present invention relates to a dishwasher having a check valve.

As shown in FIG. 1 shown in the schematic configuration diagram, the dish washing machine 1 is provided with a washing tank not shown in the main body casing which forms an external appearance and a load driving part 11 for supplying washing water in the washing tank. The load driving unit 11 is provided with a water supply pump 15 and a drain pump 17 on both sides with a sump case 13 provided in the center region, and the water supply pump 15 is supplied from the outside to the sump case. The washing water stored therein serves to supply water into the washing tank, and the drain pump 17 serves to wash the washing water in the washing tank and discharge the drainage introduced into the sump case to the outside.

The sump case 13 is combined with a water supply pipe 19 for providing a flow path for washing water supplied from the outside, and a drain pipe 27 for providing a discharge flow path for drainage by the operation of the drain pump 17. The water supply pipe 19 has its flow path opened and closed by the water supply valve 21, and when the water supply valve 21 is opened, the washing water from the outside is supplied into the sump case through the air chamber 23. The drain pipe 27 is also provided with a check valve (41 in FIG. 2) having a backflow prevention packing for opening and closing the flow path of the drain.

2 is an enlarged cross-sectional view of a conventional shank valve is installed. On the front of the drain pump 17, a pump housing 31 having a drain inlet pipe 33 through which the drainage from the sump case 13 flows and a drain discharge pipe 35 corresponding thereto are provided. The drain pan 37 is provided. The drain inlet pipe 33 is coupled to the discharge pipe 14 of the sump case 13 to provide a flow path of the drain, the drain discharge pipe 35 is coupled to the drain pipe 27. On the other hand, a check valve 41 is provided between the drain pipe 27 and the drain discharge pipe 35 to be coupled. The check valve 41 is used to mutually assemble the inflow exterior 46 having the inflow port 45 communicating with the drain discharge pipe 35 and the outflow exterior 44 having the outflow port 43 in communication with the drain pipe 27. It consists of the hollow tube formed by this, and the backflow prevention packing 48 provided in the inside of this hollow tube.

The hollow tube is connected to the inlet pipe 47 extending outwardly from the inlet port 45 of the inlet outer tube 46 is inserted into the drain discharge pipe 35, and extends outwardly from the outlet port 43 of the outlet outer tube 44. The outlet pipe 42 is inserted into the drain pipe 27 to be connected. Then, the backflow prevention packing 48 is installed in the direction of blocking the inlet 45 inside the inlet side of the hollow tube. The backflow prevention packing 48 is provided to be capable of rotating and opening in a direction in which the drainage flows out. When the pump fan 37 rotates and feeds the drainage to the outside, the backflow preventing packing 48 is opened by the water pressure, and the pump fan 37 ) Is shut off, blocking the flow path to block backflow of the drain.

However, in the conventional dish valve 41, when the drainage pump 17 is stopped in the dishwasher 1, the wastewater that is not discharged to the downstream side of the check valve 41 is not flown back. ) Can be prevented, but the upstream side, i.e., the drain between the check valve 41 and the drain pump 17, will flow back into the pump housing of the drain pump 17, and even the pump housing ( 31) and into the sump case. Thus, it is mixed with the new washing water supplied to the opening of the water supply valve 21, causing problems such as deterioration of washing performance and generation of odor. In addition, the conventional check valve 41 has a problem in that its configuration is relatively complicated and installation is inconvenient.

Therefore, the object of the present invention, in view of the conventional problems, by configuring the check valve relatively simple to make the assembly and disassembly very easy, by improving the installation position to minimize the backflow of the drainage to improve the cleaning performance at the same time It is to provide a dishwasher that can extend the life of the product.

1 is a schematic configuration diagram of a dishwasher,

2 is an enlarged cross-sectional view of a conventional shank valve is installed,

Figure 3 is an enlarged cross-sectional view of the shank valve of the present invention is installed.

Explanation of symbols for main parts of the drawings

3: main body casing 11: load driving section

13: sump case 14: discharge pipe

15: water supply pump 17: drainage pump

27: drain pipe 31: pump housing

33: drain inlet pipe 35: drain discharge pipe

51: check valve 53: intermediate pipe

55: flap packing 57: packing guide

The object of the present invention is to provide a sump case including a sump case, a drain pump for drawing and discharging drainage in the sump case, and a drain pipe providing a flow path for drainage from the drainage pump. And a check valve means installed on the flow path of the connection pipe providing a flow path between the drainage pump and the reverse flow of the drain.

Here, the check valve means is preferably composed of a flap valve.

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

This dishwasher has a configuration similar to that described with reference to FIG. 1, and FIG. 3 is an enlarged cross-sectional view of the shank valve 51 according to the present invention. As can be seen in these figures, a drain inlet pipe 33 for introducing the drainage from the sump case 13 and a drain discharge pipe 35 for allowing the discharge of the intake water are provided on the front of the drain pump 17. The branch is provided with a pump housing 31. The drain inlet pipe 33 is coupled to the discharge pipe 14 provided in the sump case 13 to form a flow path of the drain, the drain discharge pipe 35 is coupled to the drain pipe 27 in communication with the outside. In the pump housing, a drain pan 37 is provided to rotate and discharge the wash water received by receiving the driving force of the drain pump 17.

On the other hand, the mutual coupling portion of the drain inlet pipe 33 formed in the pump housing 31 and the discharge pipe 14 formed in the sump case 13 is provided adjacent to the pump housing side, and the check valve 51 is provided at these coupling portions. It is installed. The check valve 51 includes an intermediate pipe 53 interposed between the inner wall surface of the drain inlet pipe 33 and the outer wall surface of the discharge pipe 14 and a flap packing 55 for opening and closing the inner drain channel. Consists of. The flap packing 55 is provided in the direction of blocking the flow path at the end of the intermediate pipe 53 adjacent to the drain pump 17 so as to rotate open and close in the outflow direction of the drain. Thus, when the drainage in the sump case is drawn out by the operation of the drainage pump 17, the pump is rotated and opened to the inside of the pump housing to allow the flow of the drainage. And between the flap packing 55 and the distal end of the discharge pipe 14 of the sump case 13, the packing guide 57 which prevents the inward rotation of the flap packing 55 is interposed.

With this configuration, the dishwasher 1 having the check valve 51 feeds the washing water introduced through the water supply valve 21 and accommodated in the sump case into the washing tank by driving the water supply pump 15. The washing water sprayed through the spray nozzle (not shown) washes the dishes contained in the dish basket. In addition, the washing water washed in the dish is repeatedly introduced into the sump case and sprayed into the washing tank by the feed water pump 15 for a predetermined time.

On the other hand, when a predetermined time elapses, the driving of the water supply pump 15 is stopped, and the operation of the drain pump 17 is started. Then, the flap packing 55 of the check valve 51 provided on the drain flow path between the sump case 13 and the drain pump 17 is opened by the water pressure of the drained water to allow the drainage to flow out. The drained water is discharged to the outside through the drain pipe 27 by the rotational force of the drain pan 37. Then, when the drain in the drain case is completely discharged to the outside, the operation of the drain pump 17 is stopped. At this time, even if the waste water not discharged to the outside due to the operation of the drain pump 17 remains in the water supply pipe, the flap packing 55 blocks the flow path between the drain pump 17 and the sump case 13. As a result, it will not flow back into the sump case.

As described above, the dishwasher having a drain valve device according to the present invention, the drain valve device of a relatively simple configuration is installed in the drain flow path between the drain pump and the sump case, easy to disassemble and assemble, the operation of the drain pump stops The drainage backflow can be minimized, so that the drainage backflow is not mixed with the wash water supplied into the sump case. Thus, the washing performance of the tableware is much improved. Then, after the washing is finished, it is possible to reduce the propagation of bacteria due to the reflowed residual water to reduce the occurrence of odor, thereby providing an excellent effect of maintaining the cleanliness of the device.

Claims (2)

In the dishwasher having a sump case, a drain pump for drawing and draining the drainage in the sump case, and a drain pipe for providing a flow path for drainage from the drainage pump, And a check valve means installed on the flow path of the connecting pipe for providing a flow path between the sump case and the drain pump to block the reverse flow of the drain. The method of claim 1, The shank valve means is a dish washer, characterized in that the flap valve.