KR101138108B1 - A self drainage sensing structure of dish washer - Google Patents

Abstract

The present invention relates to a dishwasher, and more particularly, the filter is clogged by foreign matter accumulated in the sump of the dishwasher, and natural drainage detection for detecting a phenomenon in which the wash water stored in the sump naturally drains through the drain pump. It's about structure.

The natural drainage sensing structure of the dishwasher according to the present invention includes a sump in which washing water is stored; A drain pump installed at one side of the sump to discharge the washing water; A drain pipe through which the washing water discharged in connection with the drain pump flows; A check valve installed inside the drain pipe to open and close the drain pipe; A magnet mounted to the shock valve to generate magnetic force; And a hall sensor mounted on one side of an outer circumferential surface of the drain pipe to sense magnetic force generated from the magnet.

By the natural drainage detection structure of the dishwasher according to the present invention, by immediately detecting the natural drainage occurs due to clogging of the filter, the problem that the wash water is insufficient in the washing process is eliminated.

In addition, by using the Hall sensor and the magnet as a natural drain detection structure, the assembly process is simplified and the manufacturing cost is reduced.

첵 Valve, Magnet, Hall Sensor, Sump

Description

A self drainage sensing structure of dish washer

1 is a cross-sectional view showing a dish washer equipped with a natural drain detection device according to the spirit of the present invention.

Figure 2 is a cross-sectional view showing a natural drainage detection device mounted on the drain hose according to the spirit of the present invention.

3 is a cross-sectional view showing the operation of the natural drain detection device.

Figure 4 is a rear perspective view of the dishwasher equipped with a natural drain detection device according to the spirit of the present invention.

Figure 5 is a block diagram showing another embodiment of a natural drainage detection system according to the present invention.

<Description of the symbols for the main parts of the drawings>

100: dishwasher 110: tub 120: upper rack

130: lower rack 140: water guide 150: upper nozzle

160: lower nozzle 170: sump 180: washing pump

230: washing motor 240: drainage motor 250: drainage pump

300: drain hose 310: check valve 320: Hall sensor

The present invention relates to a dishwasher, and more particularly, the filter is clogged by foreign matter accumulated in the sump of the dishwasher, and natural drainage detection for detecting a phenomenon in which the wash water stored in the sump naturally drains through the drain pump. It's about structure.

In general, the dishwasher is a home appliance for cleaning the food residue on the surface of the dish by the high-pressure washing water sprayed from the spray nozzle. In detail, the dishwasher includes a tub in which a washing tank is formed and a sump mounted on the bottom of the tub to store washing water. Then, the washing water is moved to the spray nozzle by the pumping action of the washing pump mounted inside the sump, and the washing water moved to the spray nozzle is sprayed at high pressure through the spray hole formed at the dispensing nozzle end. In addition, the washing water sprayed at a high pressure hits the surface of the tableware, and dirt, such as food residues on the tableware, falls to the bottom of the tub.

On the other hand, in the conventional dishwasher, the sump is equipped with a filter for filtering foreign substances such as food waste. In detail, as the wash water passes through the filter, foreign matter is filtered out and stored in the foreign matter collecting chamber in the sump.

Here, the filter is clogged when there is an excessive amount of foreign matter accumulated in the foreign matter collection chamber or when there is an excessive amount of dirt in the washing water. The wash water then stays in the drain pump connected to the foreign matter collection chamber without passing through the filter. Then, when the wash water is continuously collected in the drain pump, pressure is applied to the drain pump and the drain hose connected to the drain pump by the pressure of the wash water.

In this case, the conventional dishwasher is equipped with a pressure sensor or a pressure switch at the bottom of the drain hose. In detail, when natural drainage occurs and the washing water is filled in the drain hose, the pressure sensing device detects this and forces the drainage.

However, when a pressure sensor or a pressure switch is mounted as in the related art, not only the manufacturing cost is increased but also the assembly process is complicated. And, if the pressure sensor is broken there is a problem that does not detect the natural drainage.

The present invention has been proposed to solve the above problems, and an object of the present invention is to provide a device capable of detecting when the washing water is naturally drained through the drain pump due to a blockage of the filter in the sump.

In addition, it is an object of the present invention to provide a natural drainage detection device that detects this when the natural drainage occurs, forced drainage and re-supply the wash water so that the washing process can proceed.

Natural drainage detection structure of the dishwasher according to the present invention for achieving the object as described above is a sump in which the washing water is stored; A drain pump installed at one side of the sump to discharge the washing water; A drain pipe through which the washing water discharged in connection with the drain pump flows; A check valve installed inside the drain pipe to open and close the drain pipe; A magnet mounted to the shock valve to generate magnetic force; And a hall sensor mounted at one side of an outer circumferential surface of the drain pipe to sense a magnetic force generated from the magnet.

In another aspect, the natural drain detection structure of the dishwasher according to the present invention includes a sump in which the washing water is stored; A drain pump installed at one side of the sump to discharge the washing water; An air brake connected to the drain pump and having a drain passage formed therein; A drain pipe connecting the air brake and the drain pump; A check valve installed inside the drain pipe to open and close the drain pipe; A magnet mounted to the shock valve to generate magnetic force; And a hall sensor mounted at one side of the outer circumferential surface of the drain pipe to sense magnetic force generated from the magnet.

In another aspect, the natural drain detection structure of the dishwasher according to the present invention includes a sump in which the washing water is stored; A drain pump installed at one side of the sump to discharge the washing water; An air brake connected to the drain pump and having a drain passage formed therein; A drain hose connected to the air brake so that the washing water flowing along the drain flow path is discharged to the outside; A check valve installed inside the drain hose to open and close the drain pipe; A magnet mounted to the shock valve to generate magnetic force; And a hall sensor mounted on one side of an outer circumferential surface of the drain hose to sense a magnetic force generated from the magnet.

Due to the above configuration, when the filter mounted in the sump is clogged, the drainage pump pressure is increased, so that the washing water is naturally drained.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. It should be understood, however, that there is no intention to limit the scope of the present invention to the embodiment shown, and that other embodiments falling within the scope of the present invention may be easily devised by adding, Can be proposed.

1 is a cross-sectional view showing a dish washer equipped with a natural drain detection device according to the spirit of the present invention.

Referring to FIG. 1, the dish washer 100 provided with the natural drainage sensing device according to the present invention has an outer shape, a tub 110 having a dish washing tank formed therein, and a front surface of the tub 110. Door 111 for opening and closing the washing tank, and the sump 170 is formed in the center of the bottom surface of the tub 110 to store the washing water.

In addition, the washing pump 180 is formed inside the sump 170 to pump the washing water stored in the sump 170 to a high pressure, and attached to the lower side of the washing pump 180 to the washing pump 180 A washing motor 230 that is driven is included.

In addition, the water guide 140 and the upper surface of the sump 170, which is a path for the washing water pumped from the washing pump 180 is moved, formed on the bottom of the washing tank to spray the washing water upwards A lower nozzle 160 and an upper nozzle 150 attached to an upper portion of the water guide 140 and extending in a vertical direction from the water guide 140 and positioned at a central portion of the washing tank, It is formed on the ceiling includes a top nozzle 155 for spraying the washing water vertically downward.                     

In addition, the upper rack 120 is mounted on the upper side of the upper nozzle 150 so that the dishes are washed by the upper nozzle 150, and the lower nozzle 160 so that the dishes are washed by the lower nozzle 160. The lower rack 130 is mounted on the upper side of the) and is mounted on one side of the sump 170, the drain is connected to the drain pump 250 (see Fig. 4) in order to discharge the dirty washing water to the outside during the cleaning process Hose 300 is included.

In detail, the upper rack 120 is supported by a rail (not shown) provided on the inner surface of the tub 110, and performs the front and rear movement.

Hereinafter will be described the operation of the dishwasher 100 according to the present invention.

First, the user opens the door 111 of the dishwasher 100 and pulls the upper rack 120 and / or lower rack 130 to the outside of the washing tank. In addition, dishes are stored in the racks 120 and 130. Then, the door 111 is closed and power is applied to the dishwasher.

On the other hand, when power is applied to the dishwasher 100 and the washing step is performed, the washing water flowing from the water source is introduced into the sump 170. Then, after a certain amount of washing water flows into the sump, the washing motor 190 is operated. The impeller (not shown) connected to the motor shaft of the washing motor 190 and rotated in the washing pump 180 rotates the washing water to the lower nozzle 160 and the water guide 140. Pumped.

In addition, the wash water pumped to the water guide 140 is finally moved to the top nozzle 155, the upper nozzle 150 is injected into the washing tank. In addition, the dishes stored in the racks 120 and 130 are washed by the sprayed washing water.

Here, the top nozzle 155 sprays the washing water vertically downward, and the upper nozzle 150 sprays the washing water vertically upward, thereby washing the dishes stored in the upper rack 120.

In addition, the lower nozzle 160 is sprayed the washing water vertically upward, the dishes stored in the lower rack 130 is washed. In addition, by forming an injection hole in the bottom surface of the upper nozzle 150, the washing water is sprayed in both the up and down directions, it can be configured to simultaneously wash the upper side of the tableware accommodated in the lower rack (130).

In addition, the washing water sprayed through the spray nozzle in the washing process falling to the tub bottom surface is re-introduced into the sump (170). In addition, a part of the washing water pumped by the washing pump 180 is moved to a small chamber (not shown) through a turbidity sensor (not shown) mounted inside the sump 170. In addition, the wash water moved to the soil chamber passes through a filter mounted on the upper portion of the sump 170 and flows back to the tub, and the foreign matter remains in the soil chamber. In addition, the foreign matter remaining in the soil chamber is discharged to the outside through the drain pump 250 in the drainage process.

In addition, when the washing water is discharged to the outside, clean washing water is introduced into the sump 170 again through an inlet, and sprayed through the spray nozzles 150 and 160 in the same manner as the washing step. The dishware is rinsed by the sprayed clean water.

In addition, when the rinsing step is completed, by going through the drying step, the washing operation is completed.

2 is a cross-sectional view showing a state in which the natural drain detection device according to the spirit of the present invention is mounted on the drain hose, Figure 3 is a cross-sectional view showing the operation of the natural drain detection device.

2 and 3, the natural drainage detecting apparatus according to the present invention includes a drain hose 300, a hall sensor 320 mounted on an outer circumferential surface of the drain hose 300, and an inner circumferential surface of the drain hose 300. And a check valve 310 installed in the drain hose 300 to allow the washing water to flow in only one direction, and a magnet 311 mounted to an upper side of the check valve 310 to generate magnetic force. The microcomputer 330 is connected to the hall sensor 320 to receive a detection signal transmitted from the hall sensor 320.

Hereinafter will be described the operation of the natural drainage detection device having the configuration as described above.

First, when the filter inside the sump 170 is blocked and the washing water does not pass, the washing water moves to the drain pump 250. When the washing water is collected by the drain pump 250, the pressure of the drain pump 250 is increased. When the pressure of the drain pump 250 is greater than or equal to the threshold pressure, a part of the washing water is drained from the drain pump 250 and flows into the drain hose 300. In addition, the washing water flowing into the drain hose 300 pushes up the check valve 310. When the check valve 310 is pushed up by the washing water, the magnet 311 attached to the upper side of the check valve 310 approaches the hall sensor 320. When the magnet 311 and the hall sensor 320 are close to a predetermined distance, the hall sensor 320 recognizes the magnet 311 to generate a pulse. In addition, the pulse generated by the Hall sensor 320 is transmitted to the microcomputer 330 connected to the Hall sensor 320, the microcomputer 330 detects the natural drainage. In addition, when the microcomputer 330 receives the natural drainage signal, the drainage motor 240 sends a signal to operate the forced drainage.

By the above process, when the washing water is naturally drained from the drain pump 250 is automatically forced drainage, clean washing water is re-introduced into the sump 170 to continue the washing process.

4 is a rear perspective view of a dish washer equipped with a natural drain detection apparatus according to the spirit of the present invention, Figure 5 is a block diagram showing another embodiment of a natural drain detection system according to the present invention.

4 and 5, the apparatus for detecting natural drainage according to the present invention includes a drain pipe 250 for connecting a drain pump 250 and an air brake 400 connected to the drain pump and having a drain flow path formed therein. It can be mounted on. Or, it may be mounted in the drain 251 of the portion extending from the drain pump 250 and the drain pipe 252 is coupled.

In detail, the sump 170 mounted on the bottom surface of the tub 110 of the dishwasher 100 is mounted on the bottom surface of the washing motor 230 driving the washing pump 180 and the drain pump 250 formed on the side surface. ), A drain motor 240 connected to the drain pump to drive the drain pump, and a drain port 251 formed at one side of the drain pump 250 to be a passage through which the washing water is drained. In addition, the drain 251 is connected to the drain pipe 232 is connected to the air brake 400, one end of which is attached to the side of the tub 110. In addition, the air brake 400 has a drain flow path through which the washing water flowing through the drain pipe 232 flows. In addition, a drain hose 300 is connected to the end of the drain flow path, and the washing water stored in the drain pump 250 passes through the drain hose 300 and is discharged to the outside.

More specifically, the check valve 310 is mounted in the drain port 251 formed in the drain pump 250, and the magnet 311 is mounted on the check valve 310. The hall sensor 320 is mounted on an outer circumferential surface of the drain 251. Here, the operation of the Hall sensor 320 and the magnet 311 is the same as described above. In addition, it is apparent from the spirit of the present invention that the natural drain detection device may be mounted on the drain pipe 252 connected to the drain hole 251.

By the natural drainage sensing structure of the dishwasher according to the present invention having the configuration as described above, by immediately detecting the natural drainage occurs due to clogging of the filter, the problem that the wash water is insufficient in the washing process is eliminated.

In addition, by using the Hall sensor and the magnet as a natural drain detection structure, the assembly process is simplified and the manufacturing cost is reduced.                     

In addition, since it can be used semi-permanently without fear of failure, there is an effect that the phenomenon of not detecting the natural drainage due to the failure of the detection device is removed.

Claims (7)

Sump in which washing water is stored; A drain pump installed at one side of the sump to discharge the washing water; A drain pipe through which the washing water discharged in connection with the drain pump flows; A check valve installed inside the drain pipe to open and close the drain pipe; A magnet mounted to the shock valve to generate magnetic force; And A hall sensor mounted on one side of an outer circumferential surface of the drain pipe to sense a magnetic force generated from the magnet; And a natural drainage sensing structure of the dishwasher, in which the drainage motor is operated by the drainage motor when the magnet and the hall sensor come to a certain distance when the drainage of the washing water is drained from the drainage pump by the pressure of the washing water. The method of claim 1, The hall sensor is a natural drain detection structure of the dishwasher, characterized in that for detecting the magnetic force when the magnet comes within a certain distance. The method of claim 1, The magnet is natural drain detection structure of the dishwasher, characterized in that seated on the upper surface of the check valve. The method of claim 1, The drainage pipe is a natural drain detection structure of the dishwasher, characterized in that the drainage port extending to one side of the drain pump. The method of claim 1, The natural drainage detection structure of the dishwasher further comprises a microcomputer receiving the detection signal detected by the Hall sensor to generate a drain pump drive signal. Sump in which washing water is stored; A drain pump installed at one side of the sump to discharge the washing water; An air brake connected to the drain pump and having a drain passage formed therein; A drain pipe connecting the air brake and the drain pump; A check valve installed inside the drain pipe to open and close the drain pipe; A magnet mounted to the shock valve to generate magnetic force; And Included on one side of the outer peripheral surface of the drain pipe Hall sensor for detecting the magnetic force generated from the magnet; Includes, And a natural drainage sensing structure of the dishwasher, in which the drainage motor is operated by the drainage motor when the magnet and the hall sensor come to a certain distance when the drainage of the washing water is drained from the drainage pump by the pressure of the washing water. Sump in which washing water is stored; A drain pump installed at one side of the sump to discharge the washing water; An air brake connected to the drain pump and having a drain passage formed therein; A drain hose connected to the air brake so that the washing water flowing along the drain flow path is discharged to the outside; A check valve installed inside the drain hose to open and close the drain pipe; A magnet mounted to the shock valve to generate magnetic force; And A hall sensor mounted on one side of an outer circumferential surface of the drain hose and sensing a magnetic force generated from the magnet; And a natural drainage sensing structure of the dishwasher, in which the drainage motor is operated by the drainage motor when the magnet and the hall sensor come to a certain distance when the drainage of the washing water is drained from the drainage pump by the pressure of the washing water.

Images