KR20050115724A - A sump structure of a dish washer - Google Patents

Abstract

The present invention relates to a dishwasher, and more particularly, to a sump structure having a turbidity sensor mounted on a bottom surface of a dishwasher and having a turbidity sensor for detecting contamination of the wash water and a wash water flow path inside the sump where the wash water is stored.

The sump structure of the dish washing machine according to the present invention includes a sump housing in which washing water is introduced and stored; A washing pump mounted inside the sump housing to pump washing water; Soil chamber seated on the upper side of the washing pump, and inserted into and seated on one side edge, and a turbidity sensor inserted and seated at a position spaced apart from the variuo valve; A filter covering an upper portion of the soil chamber; And a motor mounted to a lower end of the sump housing.

According to the sump structure of the dish washing machine according to the present invention, the washing water flow path structure in which the washing water pumped by the washing pump is moved to the spray nozzle is improved.

Description

Sump structure of a dish washer

The present invention relates to a dishwasher, and more particularly, to a sump structure having a turbidity sensor mounted on a bottom surface of a dishwasher and having a turbidity sensor for detecting contamination of the wash water and a wash water flow path inside the sump in which the wash water is stored.

In general, the dishwasher is a household appliance that allows the dishes to be washed by removing dirt from the dishes by the pressure of the washing water sprayed through the spray nozzle.

A general dish washing machine has a tub that forms a space for washing dishes therein, a dish storage rack accommodated at an upper side and / or a lower side of the tub for storing dishes, and a dish water stored in the dish storage rack. It consists of a spray nozzle for spraying.

In addition, a sump for storing the washing water introduced from the outside is mounted on the bottom of the tub, and a washing pump is mounted on one side of the outer circumference of the sump. The sump is provided with a washing pump connected to the motor shaft to pump the washing water, and a filter for filtering dirt. In addition, a heater for heating the washing water is built in one side of the sump.

In addition, in the case of a conventional dishwasher, a turbidity sensor for measuring the degree of contamination of the washing water accumulated in the sump is installed on the upper side of the heater or the bottom of the sump or on the washing water flow path.

Looking at the operation of the conventional dishwasher constituting the configuration as described above, clean washing water flowing from the outside is stored in the sump. Then, as the motor is operated, the pump is operated so that the washing water is pumped toward the injection nozzle. In addition, the washing water sprayed to the outside through the spray nozzle is collided with a strong pressure on the dish. The dirt is separated from the dishes by the injection pressure of the washing water, and the separated dirt is dropped onto the tub bottom by the washing water. The wash water mixed with the dirt enters into the sump again.

On the other hand, the wash water coming back into the sump is polluted by the turbidity sensor. Then, according to the contamination of the wash water measured by the turbidity sensor, the wash water is drained or circulated back to the spray nozzle by the wash pump.

 In the case of the general dishwasher as described above, since the turbidity sensor is attached to one side of the heater case or attached to the bottom of the sump, the contamination of the washing water pumped toward the spray nozzle is not accurately measured.

In addition, a separate case for mounting the turbidity sensor should be provided, or there is a disadvantage that a separate flow path structure must be formed so that the flow of wash water contacts the turbidity sensor.

The present invention has been proposed to solve the above problems, by improving the flow path of the wash water in the sump, and by having a turbidity sensor mounted on the flow path, the contamination of the wash water pumped toward the injection nozzle can be measured more accurately It is an object of the present invention to provide a sump structure.

In addition, an object of the present invention is to provide a sump structure in which a turbidity sensor is provided inside the sump structure, so that a separate case or flow path structure for the turbidity sensor is not required.

The sump structure of the dish washer according to the present invention for achieving the object as described above is a sump housing in which the washing water is introduced and stored; A washing pump mounted inside the sump housing to pump washing water; Soil chamber seated on the upper side of the washing pump, and inserted into and seated on one side edge, and a turbidity sensor inserted and seated at a position spaced apart from the variuo valve; A filter covering an upper portion of the soil chamber; And a motor mounted to a lower end of the sump housing.

By the above configuration, the structure of the wash water flow path inside the sump is improved, and the turbidity sensor is attached to the flow path, so that the turbidity of the wash water stored in the sump is more accurately measured.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the spirit of the present invention is not limited to the embodiments presented, and other embodiments included within the scope of other inventive inventions or the scope of the present invention can be easily made by adding, changing, or deleting other elements. I can suggest.

1 is an exploded perspective view showing a sump structure of a dish washer according to the spirit of the present invention.

Referring to FIG. 1, the sump 200 of the dish washing machine according to the present invention includes a sump housing 290 in which the washing water supplied from the washing water supply pipe outside the washing machine is stored, and a motor mounted on the bottom of the sump housing 290. 330 and a disposer 280 connected to the motor shaft 331 protruding from the center of the motor 330 and rotating to decompose food.

In addition, the pump case 256 is mounted to the upper portion of the disposer 280, the washing water stored in the sump housing 290 is pumped, and the impeller accommodated in the pump case 256 to pump the washing water 250 is included. In detail, the impeller 250 is inserted into the motor shaft 331 to pump the washing water while rotating together as the motor shaft rotates.

In addition, it is mounted between the disposer 280 and the pump case 256, to prevent the bulky debris of the food waste crushed by the disposer 280 to enter the pump case (256). Mesh filter 270 is included.

In addition, a soil chamber 230 is formed to cover the upper surface of the pump case 256 and to form a pumping flow path (described below) for guiding the flow of the washing water pumped inside the pump case 256.

In addition, the upper surface of the soil chamber 230 further includes a filter 220 having a spray nozzle connector on one side of the center and the edge. In detail, the spray nozzle connector is combined with the spray nozzle to direct the washing water which has moved along the pumping flow path provided in the soil chamber 230 to each spray nozzle. In addition, a variuo valve 260 is formed at one side of the soil chamber 230 to selectively guide the washing water that has moved along the pumping flow path to each injection nozzle.

In detail, an edge portion of the filter 220 is provided with a washing water through hole 221 and a mesh filter 227 for primarily filtering food waste falling directly from the tableware. In addition, a lower nozzle arm holder 210 coupled to the lower nozzle is mounted at the center of the filter 220.

Meanwhile, the washing water falling into the washing water through hole 221 is collected by the sump housing 290. In addition, after the contaminants are filtered by the mesh filter 227, the washing water falling to the mesh filter 227 is collected to the sump housing 290 along a drain flow path provided at the lower side of the mesh filter 227. .

Meanwhile, a heater 320 for heating the washing water is inserted into the sump housing 290, and a drain pump 310 is attached to one side of the sump housing 290.

Briefly describing the flow of the washing water in the sump structure according to the present invention constituting the configuration as described above, first, as the motor 330 rotates, the washing water stored in the bottom of the sump is impeller 250 mounted in the pump case 256. Inhaled toward In addition, the washing water pumped by the rotation of the impeller 250 is primarily purified while passing through the mesh filter 270. The upper and lower nozzles are guided along the flow path formed by the pump case 256 and the small chamber 230, respectively. Here, the washing water is guided to the upper nozzle or the lower nozzle by the vario valve 260. In detail, the vario valve 260 allows the washing water to only open either the upper nozzle or the lower nozzle for a predetermined time. Then, after a certain time, only the other nozzles are alternately opened, so that the washing water is evenly sprayed on the upper nozzle and the lower nozzle.

Meanwhile, some of the washing water guided along the flow path passes through the turbidity sensor, which will be described later, and is moved to the drain pump along a drain flow path (to be described later) formed at the outside of the soil chamber 230.

In addition, the washing water sprayed through the upper nozzle and the lower nozzle is dropped to the tub bottom surface. Then, the falling washing water is moved back to the sump housing 290 through the filter 220. The dirt contained in the wash water moved to the sump housing 290 is crushed by the disposer 280 mounted below the mesh filter 270.

Functions and operations of the respective components will be described later in detail with reference to the accompanying drawings.

Figure 2 is an exploded perspective view showing a lower nozzle arm holder structure according to the spirit of the present invention.

2, the lower nozzle arm holder 210 according to the present invention is formed by combining the lower nozzle connection portion and the washing water inlet portion as shown.

In detail, the lower nozzle connection part is mounted at the center of the filter 220 and extends to both sides of the bottom surface of the lower nozzle insert 211 and the bottom surface of the lower nozzle insert 211 which rise upward. A fastening blade 212 for fastening with 220 is included.

In addition, the washing water inlet is inserted into the bottom surface of the lower nozzle connection. In detail, the washing water inlet may include a washing water inlet 214 for introducing pumped washing water and an insertion rib 216 formed on an upper surface of the washing water inlet 214 and inserted into a bottom surface of the lower nozzle insert 211. And a washing water riser 215 for raising the washing water introduced through the washing water inlet 214 toward the lower nozzle. In addition, the washing water inlet 214 is formed so that the inner wall is smoothly rounded shape, so that the loss due to the flow friction while the incoming washing water rises vertically. In addition, the washing water inlet 214 is connected to the end of the lower nozzle guide passage 236 which will be described later. Therefore, the washing water flowing along the lower nozzle guide flow path 236 flows into and rises into the washing water inlet 214 and is moved to the lower nozzle.

3 is a plan view showing a filter covering an upper surface of a sump structure according to the spirit of the present invention.

Referring to Figure 3, the filter 220 according to the present invention forms a disk shape having a predetermined diameter to cover the upper surface of the sump housing.

In detail, the filter 220 has a lower nozzle arm holder insertion hole 223 for inserting and seating the lower nozzle arm holder 210 at the center thereof. In addition, fastening member insertion grooves 222 are formed at both sides of the lower nozzle arm holder insertion hole 223 to be coupled to the soil chamber which will be described later.

In addition, the filter 220 is formed with a plurality of through-holes 221 at regular intervals on the outer peripheral surface edge portion. In detail, when the washing water sprayed on the dish drops to the bottom surface of the tub, the washing water is moved to the sump bottom through the washing water through hole 221. In addition, the bulky dirt contained in the washing water does not pass through the washing water through-groove 221 and is hung on the upper surface of the filter 220. On the other hand, the dirt passing through the wash water through hole 221 is crushed by the disposer 280 mounted inside the sump.

In addition, the filter 220 is formed with a plurality of band-shaped grooves having a predetermined width inside, the mesh filter 227 is mounted on the groove. Here, the strip-shaped groove is formed along the shape of the drain flow path formed in the soil chamber which will be described later. Therefore, a part of the washing water falling to the bottom of the tub is filtered by the mesh filter 227, and then dropped into the drain flow path is collected on the bottom surface of the sump along the drain flow path.

In addition, the filter 220 allows the protrusions protruding from the center of the vario valve to be seated, the vario valve support groove 224 for supporting the vario valve 260, and the vario valve 260. A lower nozzle guide flow path 225 for guiding a portion of the wash water branched from the head) to the lower nozzle, and a cylindrical shape formed at the edge of the variioval valve 260 and protruding to a predetermined height. Water guide insertion sleeve 226 is included.

In detail, a portion of the wash water branched from the variuo valve 260 is guided through the water guide insertion sleeve 226 to the upper nozzle.

4 is a plan view showing a soil chamber according to the inventive concept.

Referring to FIG. 4, a soil chamber 230 according to the present invention is inserted into the lower end of the filter 220.

In detail, the upper surface of the soil chamber 230 is a lower nozzle that is formed by bending the variuo valve seat 235 into which the vario valve 260 is inserted and the center of the vario valve seat 235. A guide flow path 236 and a water guide guide flow path 237 which are formed outward from the variio valve seat 235 and connected to the water guide insertion sleeve 226 are included. In detail, a lower nozzle arm holder seating groove 239 for seating the lower nozzle arm holder 210 is formed at the end of the lower nozzle guide passage 236.

In addition, the edge side of the soil chamber 230 includes a drain passage 241 having a predetermined width and depth and formed along the shape of the soil chamber 230. One end of the drain passage 241 is connected to a turbidity sensor (to be described later), and a bottom hole of the other end is provided with a drain hole 242 connected to the drain pump. Here, the drain hole 242 forms a cylindrical shape extending downward to a predetermined length, and is inserted into a small chamber drain hole to be described later.

In detail, the soil chamber 230 has a turbidity sensor guide passage 233 connected to one side of the turbidity sensor 400 (see FIG. 11) and a pumping passage (described later), and is formed on a side of the pumping passage. The turbidity sensor flow path groove 234 is further included to allow the washing water to flow through the turbidity sensor guide flow path 233.

In addition, a pump case seating portion 240 having the same shape as the outer shape of the pump case 256 is formed on the rear surface of the soil chamber 230 so as to allow the upper surface of the pump case 256 to be seated. In addition, an impeller seating portion 238 for mounting the impeller 250 is formed at the center of the pump case seating portion 240.

In detail, the pump case seating part 240 and the impeller seating part 238 are formed along the shape of the pump case 256 and the impeller 250, and protrude to a predetermined height from the rear surface of the soil chamber 230. To form a rib shape.

More specifically, the space formed between the pump case seating portion 240 and the impeller seating portion 238 in order to guide the washing water pumped by the rotation of the impeller 250 to the variuo valve 260 This pumping flow path 231 becomes. In addition, an end of the pumping flow path 231 which meets the vario valve 260 is formed to be inclined at a predetermined angle, and the turbidity sensor flow path groove 234 is formed at a side of the inclined surface. Therefore, the washing water pumped in the pump case 256 is moved along the pumping flow path, and a small amount of the washing water is branched toward the turbidity sensor flow path groove 234 and flows along the turbidity sensor guide flow path 233. The branched wash water flows along the drain passage 241 formed at an upper edge of the soil chamber 230 after the turbidity of the wash water is sensed by the turbidity sensor while passing through the turbidity sensor. In addition, the washing water is discharged through the drain hole 242 formed at the end of the drain passage 241 and stored in the sump housing 290.

In addition, the soil chamber 230 is a filter stiffening member insertion boss 243 is formed to protrude to a predetermined height in a position spaced a predetermined distance from the lower nozzle arm holder seating groove 239, and the filter stiffening formed on the edge portion Member insertion boss 244 is included. In addition, the front support boss insertion groove 245 is formed at least one of the outer edge portion of the variuo valve seat 235 is further included.

Referring to the flow of the washing water occurring in the soil chamber 230, first, the washing water pumped inside the pump case 256 is rotated along the pumping flow path 231 to the variuo valve seat 235 Is moved. A portion of the washing water moving along the pumping flow path 231 is moved along the turbidity sensor guide flow path 233. In addition, most of the washing water moved to the variio valve seat 235 is moved along the lower nozzle guide passage 236 and the water guide guide passage 237. Then, the inside of the tub is sprayed through the lower nozzle and the upper nozzle, respectively.

On the other hand, the washing water flowing along the turbidity sensor guide flow path 233 passes through the turbidity sensor and then flows along the drainage flow path 241. In addition, the contaminated washing water flowing along the drain passage 241 is collected into the sump housing 290 through the drain hole 242.

5 is a plan view of the impeller according to the spirit of the present invention, Figure 6 is a rear perspective view of the impeller.

5 and 6, the impeller 250 according to the present invention includes a rotating shaft 253 extending vertically downward from the center of the upper surface by a predetermined length. In detail, a motor shaft insertion hole 252 for inserting a motor shaft is formed at the center of the rotation shaft 253. In addition, a circular washing water inlet 254 having a predetermined diameter is formed at a lower end of the impeller 250, and a plurality of blades 251 curved at a predetermined curvature are formed at a side surface thereof. A washing water outlet 255 is formed between the blade 251 and the blade 251.

7 is a plan view of a pump case according to the spirit of the present invention.

Referring to FIG. 7, in the pump case 256 according to the present invention, the impeller 250 is seated at the center. In addition, a groove having the same diameter as that of the washing water inlet 254 formed in the bottom surface of the impeller 250 is formed in the central portion of the pump case 256. Therefore, when the impeller 250 rotates, the washing water flows into the impeller 250 through the groove. In addition, the mesh filter 270 is mounted below the groove, and the washing water in which the dirt is filtered is introduced into the impeller 250.

In addition, the pump case 256 is formed with an impeller seating groove 257 recessed to a little depth in order for the impeller 250 to be seated. In addition, a pumping flow path 258 formed between the outer circumferential surface of the impeller seating groove 257 and the outer circumferential surface of the pump case 256 is formed. In detail, the pumping flow path 258 has a predetermined depth by the outer wall of the pump case 256. In addition, the washing water discharged through the washing water outlet 255 formed on the side of the impeller 250 is moved to the variuo valve 260 along the pumping flow path 258.

On the other hand, the end of the pumping flow path 258 forms an inclined surface 259 inclined at a predetermined angle, and extends a predetermined length in a tangential direction from the outer peripheral surface of the pump case 256.

8 is a plan view showing a sump housing according to the spirit of the present invention.

Referring to FIG. 8, the sump housing 290 according to the present invention functions to store the washing water introduced into the dishwasher.

In detail, the sump housing 290 may include a water supply connector 291 protruding from one side of the lower surface, a drain pump case 296 recessed on an approximately opposite side of the water supply connector 291, and a predetermined depth at an inner center thereof. A heater accommodating portion 292 is formed to be recessed.

In detail, a motor shaft through groove 293 is formed at the center of the heater accommodating portion 292, and a heater inlet for inserting the heater 320 at one side of the sump housing 290. 298 is formed.

In addition, the drain pump case 296 is connected to the small chamber drain groove 297, and a sump drain groove 302 is formed at the side of the small chamber drain groove 297. In detail, the sump drain groove 302 serves to prevent at least one rib from being formed vertically so that bulky food waste does not flow into the drain pump. In addition, a drain hose connector 299 is formed at a side of the drain pump case 296 and has a predetermined length and diameter.

On the other hand, one side of the sump housing 290, the varios valve seating groove 295 for seating the vario valve 260, and the turbidity sensor receiving groove 294 formed on the side of the vario valve seating groove 295. ), And a plurality of rear end support bosses 301 and front end support bosses 300.

In detail, the front support boss 300 is formed in the variio valve seating groove 295, and the rear support boss 301 is formed at a position spaced a predetermined distance from the front support boss 300. Therefore, the soil chamber 230 fastened by the boss is firmly mounted without being oscillated in the sump housing 290.

 The flow of the washing water occurring in the sump housing 290 having the above configuration will be described.

First, washing water flows into the heater receiving portion 292 through the water supply connector 291. In addition, the washing water temperature is increased by the heater 320 accommodated in the heater accommodating part 292. When the amount of the washing water reaches the set amount, the motor 330 mounted on the bottom of the sump housing 290 is operated.

Here, as the motor shaft 331 rotates, the impeller 250 seated inside the sump housing 290 rotates together. In addition, the washing water is pumped to the upper nozzle and the lower nozzle by the rotation of the impeller 250. In addition, the washing water pumped to the upper nozzle and the lower nozzle is sprayed on the dish, and falls back to the tub bottom. In addition, the washing water falling to the bottom of the tub is stored back into the sump housing 290 along the washing water through-hole 221 of the filter 220.

On the other hand, the washing water passing through the mesh filter 227 is moved along the drain passage 241 formed on the top of the soil chamber 230. In addition, the washing water moving along the drain passage 241 is dropped into the small chamber drain groove 297 and stored in the drain pump case 296. Here, the interior of the sump housing 290 and the drain pump case 296 communicate with each other by the sump drain groove 302.

In addition, when the washing is completed and the drain pump 310 is operated to discharge the wash water containing the dirt, the wash water stored in the drain pump case 296 is discharged to the outside through the drain hose connector 299. .

9 is a perspective view showing a sump structure in which a turbidity sensor is mounted according to the spirit of the present invention, and FIG. 10 is an enlarged perspective view showing a state in which the turbidity sensor is mounted.

9 and 10, the turbidity sensor 400 according to the present invention is formed at the beginning of the drain passage 241 formed on the upper surface of the soil chamber 230. In addition, the turbidity sensor guide flow path 233 starts at the end side of the pumping flow path 231 formed at the lower end of the soil chamber 230.

In detail, as shown in the drawing, a small amount of the washing water guided along the pumping flow path 231 is branched into the turbidity sensor guide flow path 233 to pass through the turbidity sensor 400. In addition, turbidity is detected by the turbidity sensor 400 and is moved back to the sump bottom along the drain passage 241.

As described above, the turbidity sensor 400 according to the present invention is conventionally installed on the bottom of the sump, or is attached to one side of a heater installed outside the sump, and is installed on the wash water flow path inside the sump. have. Therefore, there is an advantage that turbidity of the wash water can be measured at every instant of washing water injection.

Hereinafter, the configuration and function of the turbidity sensor 400 will be described in more detail based on the drawings.

11 is a front view showing a turbidity sensor according to the spirit of the present invention.

Referring to FIG. 11, the turbidity sensor 400 according to the present invention may have a cylindrical shape having a predetermined diameter and a height, and a case including a ball seating bone 490 having a center portion separated into a predetermined width and depth ( 410 and a ball 420 seated on the ball seating bone 490 to reciprocate forward and backward.

In addition, the PCB seat 450 is inserted into the inside of the case 410 symmetrically separated on both sides by the ball seating bone 490, and is seated on the PCB board 450, the ball seating bone 490 The light emitting unit 430 is inserted into one side of the case 410 separated by the light emitting unit 430 to emit light, and the light emitting unit 430 is mounted inside the case 410 opposite to the light emitting unit 430. A light receiving unit 440 for receiving the light emitted is included. In detail, the light emitting unit 430 and the light receiving unit 440 are both fixed to the PCB substrate 450.

In addition, both ends of the ball seating bone 490 includes a barrier 460 formed at a predetermined height in order to prevent the ball 420 moving forward and backward reciprocating in the ball seating bone 490.

In addition, the cover 470 that seals the lower end of the case 410, and extends through the cover 470, and transmits a signal transmitted from the light receiving unit 440 to the PCB 450 to the controller Terminal 480 is further included.

In detail, according to the position of the ball 420, whether the light receiving unit 440 detects the light emitted from the light emitting unit 430 is transmitted to the PCB substrate 450. In addition, the contamination degree of the washing water passing through the ball seating bone 490 is measured and transmitted to the PCB board 450. The transmitted information is transmitted to the controller through the terminal 480. In addition, whether the washing pump or the drain pump is operated according to the transmitted signal is determined.

12 and 13 are side views showing an operating state of the turbidity sensor according to the spirit of the present invention.

Referring to FIG. 12, the washing water passing through the ball seating bone 490 of the turbidity sensor 400 according to the present invention does not exist, and the ball 420 is located at the center of the turbidity sensor 400. Will be located. In detail, the bottom surface of the ball seating bone 490 reciprocating the ball 420 is formed to be inclined at a predetermined angle from the center portion to both ends as shown. Therefore, when there is no washing water to push the ball 420, the ball 420 is always located in the center. In addition, the light emitter 430 and the light receiver 440 are also inserted into a central portion of the turbidity sensor. Therefore, in the state where the ball 420 is located at the center, the light emitted from the light emitting part 430 may not be transmitted to the light receiving part 440.

In other words, when the ball 420 is positioned at the center part of the normal washing process, the light emitted from the light emitting part 430 may not be transmitted to the light receiving part 440, which means that the washing water is not circulated. That is, since the washing motor 330 is not operated, washing water pumping does not occur, or washing water is not circulated because no washing water is present in the sump 200.

Therefore, when the light emitted from the light emitting unit 430 is not detected by the light receiving unit 440 as described above, by detecting a failure of the motor to generate a failure signal, so that the user can check whether the operation of the motor do.

Or, it is programmed to detect that no wash water is present in the sump 200 to generate a leak signal, and at the same time, stop supplying power to the heater 320. In detail, when the leak signal is generated in the controller, the user may check whether the leak occurs in the sump portion of the dishwasher. In addition, since the program is programmed to stop the power supply to the heater 320, a fire due to overheating of the dishwasher is prevented.

Referring to FIG. 13, as the ball 420 is located at one end of the turbidity sensor 400, the washing water flows along the turbidity sensor guide flow path 233, and the ball 420. Means to push.

In detail, during normal cleaning, the ball 420 should be positioned at the edge of the turbidity sensor. Therefore, the light emitted from the light emitting unit 430 is to be easily transmitted to the light receiving unit 440.

On the other hand, when the ball 420 is out of the light emitting unit 430 and the light receiving unit 440, the degree of contamination of the wash water according to the degree that the light emitted from the light emitting unit 430 reaches the light receiving unit 440 Will be detected.

In detail, the light receiving unit 440 detects the intensity of light that is reached, and the light intensity value is transmitted to the controller of the dishwasher through the PCB board 450 and the terminal 480. Then, the degree of contamination of the washing water is determined according to the transmitted light intensity, and the washing time and the number of washing or the rinsing time and the number of rinsing are determined.

In other words, when the amount of light reaching the light receiving unit 440 is very low, the washing water is very contaminated, and the washing water is increased at least one time or the number of rinsing times according to the light intensity value reaching the light receiving unit 440. It may be programmed to stretch at least once.

As described above, the conventional turbidity sensor merely performed a function of detecting only the contamination level of the washing water and delivering it to the controller. However, the turbidity sensor according to the present invention, in addition to the function of detecting the contamination of the wash water as described above, has a feature that can detect the failure of the washing motor and the presence of the wash water in the sump, or even the function of detecting the leakage.

By the sump structure of the dish washing machine according to the present invention having the configuration as described above, there is an effect that the washing water flow path structure in which the washing water pumped by the washing pump is moved to the injection nozzle.

In addition, by being equipped with a turbidity sensor on the wash water flow path in the sump according to the present invention, there is an effect that the turbidity of the wash water toward the injection nozzle is more accurately detected.

In addition, since the turbidity sensor is mounted inside the sump structure, unlike an existing heater or a sump lower portion, the assembling process is simplified and the material cost is reduced.

1 is an exploded perspective view showing a sump structure of a dish washer according to the spirit of the present invention.

Figure 2 is an exploded perspective view showing a lower nozzle arm holder structure according to the spirit of the present invention.

3 is a plan view showing a filter covering the upper surface of the sump structure according to the spirit of the present invention.

Figure 4 is a plan view showing a soil chamber in accordance with the teachings of the present invention.

5 is a plan view of the impeller according to the spirit of the present invention.

6 is a rear perspective view of the impeller.

7 is a plan view of a pump case according to the spirit of the present invention.

8 is a plan view showing a sump housing according to the spirit of the present invention.

Figure 9 is a perspective view showing a sump structure equipped with a turbidity sensor according to the spirit of the present invention.

10 is an enlarged perspective view showing a state in which the turbidity sensor is mounted.

11 is a front view showing a turbidity sensor according to the spirit of the present invention.

12 and 13 are side views showing an operating state of the turbidity sensor according to the spirit of the present invention.

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

210: lower nozzle arm holder 220: filter 230: soil chamber

240 pump seating part 250 impeller 260 Vario valve

270: mesh filter 280: disposer 290: sump housing

300: shear support boss 310: drain pump 320: heater

330 motor 400: turbidity sensor

Claims (11)

A sump housing in which washing water is introduced and stored; A washing pump mounted inside the sump housing to pump washing water; A vario valve seated on an upper side of the washing pump and inserted and seated on one side edge; A soil chamber including a turbidity sensor inserted and seated at a position spaced a predetermined distance away from the vario valve; A filter covering an upper portion of the soil chamber; And And a motor mounted to a lower end of the sump housing. The method of claim 1, The sump structure of the dishwasher, characterized in that the mesh filter is mounted to the bottom of the washing pump. The method of claim 1, The sump structure of the dishwasher, characterized in that the disposer for crushing the dirt is mounted to the bottom of the washing pump. The method of claim 1, The sump chamber is a sump structure of a dishwasher including a pumping flow path formed on a back surface along a line in contact with the top surface of the washing pump. The method of claim 4, wherein An end of the pumping flow path is sump structure of the dishwasher, characterized in that connected to the vario valve. The method of claim 1, The small chamber may include a lower nozzle guide flow passage through which the washing water is branched from the variuo valve to the lower nozzle on an upper side thereof; The sump structure of the dishwasher including a water guide guide flow path for allowing the washing water is branched from the variio valve to the upper nozzle. The method of claim 1, The sump chamber is a sump structure of a dishwasher including a turbidity sensor guide flow path for allowing a portion of the washing water pumped from the washing pump to branch and flow to the turbidity sensor. The method of claim 1, The sump chamber is a sump structure of the dishwasher, characterized in that the drainage flow path for allowing the washing water passing through the turbidity sensor to move to the sump housing is formed along the outer circumferential surface. The method of claim 1, The filter has a plurality of grooves formed near the edge, the sump structure of the dishwasher, characterized in that the washing water sprayed into the tub is collected in the sump housing. The method of claim 1, The filter is equipped with a mesh filter covering the upper surface of the drain passage formed on the soil chamber, so that a portion of the washing water sprayed into the tub is collected in the sump housing along the drain passage. Sump structure. The method of claim 1, The wash water stored in the sump housing is moved to the vario valve along a pumping flow path formed between the soil chamber and the washing pump by a pumping action of the washing pump. By the action of the vario valve is moved to the lower nozzle or the upper nozzle, respectively, along the lower nozzle guide flow path or water guide guide flow path formed on the upper surface of the soil chamber, Some small amount of the washing water moved along the pumping flow path is moved to the turbidity sensor along the turbidity sensor guide flow path branched from the side of the pumping flow path, The wash water passing through the turbidity sensor is collected into the sump housing through a drain passage formed by bending along the outer circumferential surface of the soil chamber. The washing water sprayed into the tub through the lower nozzle or the upper nozzle is formed with a flow path collected into the sump housing along a drain passage on a silo chamber covered by a plurality of grooves or mesh filters formed at the edge of the filter. The sump structure of the dishwasher characterized by the above.