KR100698308B1 - Dish washer - Google Patents

Abstract

The present invention relates to a dishwasher having an improved coupling structure of parts. The present invention comprises a sump for receiving wash water; An impeller for pumping the washing water, a washing motor for circulating the washing water by driving the impeller, a pump discharge port for discharging the washing water, and a pump suction port provided in parallel with the pump discharge port, and installed at a side of the sump A pump assembly; It provides a dishwasher comprising a screen for filtering the dirt contained in the wash water flowing into the pump assembly in the sump.

According to the present invention, the assembly process is simple by assembling components provided in the pump assembly and then coupling the pump assembly to the sump.

Dishwasher, Pump Assembly, Screen, Sump

Description

Dishwasher {dish washer}

1 is a cross-sectional view showing the internal configuration of a dish washing machine according to the prior art.

Figure 2 is an exploded perspective view showing a drive unit of the dishwasher according to the prior art.

3 is a plan view of the dishwasher according to the present invention.

Figure 4 is an exploded perspective view showing a drive unit of the dishwasher according to the present invention.

5 is an exploded perspective view of a pump assembly of the dishwasher according to the present invention.

6 is a cross-sectional view showing another embodiment in which the screen of the dishwasher according to the present invention is coupled.

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

100: base 110: tub

120: sump 170: dirt chamber

180: filter frame 190: filter housing

200: pump assembly 230: cleaning motor

240 impeller housing 250 impeller

260: screen 270: front casing

280: grinder 300: fixed holder

The present invention relates to a dishwasher, and more particularly, to a dishwasher having an improved coupling structure of parts.

In general, a dishwasher means a machine that automatically washes dishes. Since the dishwasher has functions of washing, rinsing, drying, and storing the dishes, it is possible to reduce household work.

The washing method of the dishwasher is largely divided into a shower type and an ultrasonic type, and the shower type is mainly used at home. In the shower type, the hot water dissolved in detergent in the dishware contained in the dish basket is strongly sprayed and washed.

There are two methods of spraying water: a propeller, a method of spinning a hole through a lot of holes in the pipe, and the like.

1 is a schematic cross-sectional view showing a conventional dishwasher. Referring to Figure 1, the structure of a conventional dish washer will be described.

Conventional dishwashers are tubs (1) installed in the main body of the dishwasher, upper and lower injection arms (4, 5) installed in the tub, upper and lower racks (6, 7) in which the dishes are stored, and washing water It comprises a drive unit 10 for providing a force to circulate.

Here, a washing space for washing dishes is formed in the tub 1, and upper and lower spray arms 4 and 5 for spraying the washing water are provided on the inner upper and lower portions of the tub 1. In addition, the dishes washed by the washing water sprayed from the spray arms are accommodated in the upper and lower racks (6, 7).

Meanwhile, the washing water sprayed through the injection arms 4 and 5 is pumped by the driving unit 10, and the driving unit 10 includes a sump and a pump. Wash water is stored in the sump, and the wash water stored in the sump is pumped by the pump and moved to the injection arms 4 and 5 along the upper and lower guide tubes 2 and 3.

Figure 2 is an exploded perspective view of the driving unit of the dishwasher according to the prior art. The driving unit of the dish washing machine will be described in detail with reference to FIG. 2.

The driving unit 10 of the conventional dishwasher includes a sump 20 in which washing water is received, a heater 30 installed inside the sump, a washing pump for pumping the washing water, and a drain pump 50 for draining the washing water. It is done by

The sump 20 is installed at the lower end of the dishwasher driving unit, and the washing water accommodating part 21 is provided in the sump 20 to provide a space in which the washing water is accommodated. In addition, a heater 30 for heating the washing water is provided in the washing water accommodating part 21. In addition, the drain pump 50 is installed on one side of the sump, and the wash water received in the sump 20 is discharged to the outside via the drain chamber 22.

On the other hand, the washing pump comprises a motor 40 for providing a force for circulating the washing water, an impeller 42 coupled to the motor, an impeller housing 60 for receiving the impeller.

The impeller 42 is accommodated in the impeller housing 60 provided in the upper part of the sump 20, and the impeller 42 is connected to the motor 40 provided in the lower part of the sump 20. More specifically, the impeller 42 is connected to the motor shaft 41 formed in the motor to rotate.

A dirt chamber 70 is provided at an upper side of the impeller housing 60. When the impeller 42 is rotated by the driving of the motor 40, the washing water flows into one side of the dirt chamber 70 and then a control valve ( 26) is selectively moved to the upper or lower injection arms according to the opening and closing of 26). The control valve 26 is driven by a valve control device 25 provided below the sump.

Here, the washing water moved to the spray arms is used to wash the dishes. In addition, a part of the washing water is always introduced into the sampling flow path formed in the dirt chamber, and the washing water flowing into the sampling flow path is purified as described below.

The process of purifying the washing water is as follows.

A filter frame 80 is provided above the dirt chamber 70, and holes 82 communicating with the sump 20 are formed at an outer edge of the filter frame 80. In addition, a filter housing 90 is mounted on the filter frame 80, and the filter housing 90 is provided with a filter 94 for filtering dirt contained in the washing water. In addition, a guide tube support member 96 connected to the lower guide tube (3 in FIG. 1) is coupled to a central portion of the filter housing 90 as a separate component.

Accordingly, the washing water introduced into the sampling flow path is purified while overflowing the filter 94 and then recovered to the sump 20 through the holes 82 formed in the filter frame 80. .

After the washing is completed, the washing water is discharged to the outside by the drain pump 50.

However, the dishwasher according to the prior art had the following problems.

First, since the motor and pump used in the conventional dishwasher are provided separately based on the sump, there is a problem that it is difficult to assemble with components including a screen installed inside the sump. For this reason, the production time is lowered and the price of the product is increased due to the large assembly time.

Second, the motor and pump used in the conventional dishwasher has a problem that the washing space inside the tub is reduced by installing the sump and up / down direction.

The present invention is to solve the above problems, an object of the present invention to provide a dishwasher that can simplify the assembly of the drive unit of the dishwasher.

Another object of the present invention is to provide a dishwasher capable of increasing the space in which the dishes are washed.

In order to achieve the above object, the present invention provides a sump for receiving wash water; An impeller for pumping the washing water, a washing motor for circulating the washing water by driving the impeller, a pump discharge port through which the washing water is discharged, and a pump suction port provided in parallel with the pump discharge port and installed at a side of the sump A pump assembly; It provides a dishwasher comprising a screen for filtering the dirt contained in the wash water flowing into the pump assembly in the sump.

The front casing in which the pump discharge port and the pump suction port are formed is directly connected to the sump, and the screen is preferably installed at the front end of the pump suction port.

The center of the screen may include a through hole through which the motor shaft of the washing motor passes, and a plurality of through holes through which the washing water flows is formed around the through hole.

In addition, it is preferable that a screen bearing is installed on the inner circumferential surface of the through hole to reduce friction with the motor shaft.

On the other hand, it is preferable that the front end of the screen is provided with a grinder coupled to the motor shaft to grind dirt while rotating.

In addition, a predetermined coupling hole is formed in the screen so that the screen is screwed to the pump suction port. In addition, the screen is preferably fastened to the hook protruding from the pump suction port.

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

3 is a plan view of the dishwasher according to the present invention, Figure 4 is an exploded perspective view of the drive unit of the dishwasher according to the present invention.

As shown in FIG. 3, the dishwasher finishes the tub 110 and the pump assembly 200 provided to circulate the washing water and the sump 120 installed inside the tub to provide a space for washing the dishes. It comprises a drain pump 130 for discharging one washing water.

A base 100 is formed below the tub to form a bottom of the main dishwasher. A door 500 for opening and closing the main body of the dishwasher is formed at the front of the dishwasher. Of course, the door may be formed on the side of the dishwasher.

The pump assembly 200 is installed on the side of the sump 120, and may be manufactured and assembled separately from the sump. Thus, in assembling the dishwasher, the assembly process is simple and the assembly time is shortened, thereby increasing the productivity of the product. In addition, since the pump assembly 200 is installed at the side of the sump, the vibration generated by the pump assembly 200 may be reduced from being transmitted to the sump.

Meanwhile, as shown in FIG. 4, the driving unit of the dishwasher includes a pump assembly 200 and a sump 120 connected to the pump assembly provided to circulate the washing water.

Here, the sump 120 is preferably provided with a heater 123 for heating the washing water. In addition, the edge of the sump 120 is inserted into and fixed to the hole 111 formed at the center of the tub lower plate 112, and the base 100 is provided below the tub lower plate 112. A ring-shaped packing member 115 is provided between the edge of the hole 111 and the edge of the sump 120 to prevent leakage of the washing water.

A predetermined gap is formed between the bottom surface of the tub lower plate 112 and the bottom surface of the base 100, and the pump assembly 200 is installed in the space forming the gap. Therefore, after the sump 120 is inserted into the hole 111 formed in the tub lower plate 112 and the pump assembly 200 is assembled to the sump 120, the tub lower plate 112 is formed on the base 100. Loaded on top.

The pump assembly 200 preferably includes a pump inlet 212 through which the washing water is sucked and a pump discharge port 211 through which the sucked washing water is pressurized and discharged. In addition, the sump 120 includes a connector 127 and a sump suction port 126 that are coupled to the pump suction port 212 and the pump discharge port 211 in parallel.

Therefore, the wash water stored in the sump 120 is sucked into the pump assembly 200 through the connector 127 and the pump inlet 212, and the sucked wash water is pressurized by an impeller and then the pump discharge port 211. Through the sump suction port 126 is introduced.

Here, the pump inlet 212 and the pump outlet 211 is directly connected to the connector 127 and the sump inlet 126. Therefore, since there is no need to connect a separate washing water hose, it is possible to facilitate the assembly of parts.

The connector 127 and the sump suction port 126 are preferably provided side by side along a direction horizontal to the ground. In addition, the pump assembly 200 is fastened to the side of the sump 120 in a horizontal direction with the ground, thereby reducing the overall height of the sump 120, it is possible to increase the space utilization in the dishwasher. .

On the other hand, the top of the sump 120 is provided with a dirt chamber 170. Here, the existing impeller housing is provided in the pump assembly as described below, it is possible to simplify the components provided on the upper sump.

Referring to the movement of the wash water in the sump 120 as follows.

The washing water pumped through the sump suction port 126 is introduced into the washing water inlet 171 of the dirt chamber 170 through the supply hole 121 formed in the upper surface of the sump 120. One side of the washing water inlet 171 is formed with flow paths 176 and 177 connected to the upper or lower arm of the washing water. The washing water introduced into the washing water inlet 171 is selectively supplied to the flow paths 176 and 177 by the control valve 173. Here, a part of the washing water always flows into the sampling flow path 175.

The control valve 173 has a partially hollow cylindrical shape, and selectively opens and closes each flow path as it is rotated. In this case, the sampling flow path 175 is always maintained in communication with the washing water inlet 171.

Here, of course, the washing water supplied to the flow paths 176 and 177 connected to the upper and lower arms is sprayed into the dishes accommodated in the upper and lower racks through the upper arm or the lower arm. On the other hand, the washing water supplied to the sampling flow path 175 is preferably dropped to the drain pump connecting portion 125 provided on one side of the sump 120 through the connecting pipe 178. At this time, the large volume of dirt contained in the wash water is accumulated in the lower side of the drain pump connection (125).

Subsequently, the washing water has a predetermined interval with the outside of the connecting pipe 178, and surrounds the connecting pipe, and the dirt chamber 170 is provided along a recovery pipe (not shown) (not provided in the sump) having an annular cross section. Flows back to the inner side.

Here, a filter frame 180 and a filter housing 190 mounted on the upper surface of the central portion of the filter frame are provided on the dirt chamber 170. In the central portion of the filter housing 190, a support member 196 for supporting and fixing a guide tube connected to an upper injection arm is preferably welded and coupled to the filter housing 190.

In addition, the filter housing 190 is provided with a filter 194 along the circumferential direction, the through-holes 185 corresponding to the filter is formed in the filter frame 180 and the sump 120 on the outer surface ) A plurality of recovery holes 182 are formed. Therefore, the washing water introduced into the dirt chamber 170 is overflowed and purified while passing through the filter 194, and is recovered to the sump 120 through the recovery hole 182.

In this way, some of the washing water is purified, and the purified washing water is again sprayed into the dishes through the spraying arm. Here, the dirt accumulated in the lower side of the drain pump connection part 125 is discharged to the outside together with the wash water when the drain pump 130 is driven during the wash water discharge stroke after the washing stroke of the dish is completed.

Referring to Figure 5, the configuration of the pump assembly for pumping the washing water in detail as follows.

The pump assembly 200 includes an impeller 250 for pumping the washing water, a washing motor 230 for driving the impeller to circulate the washing water, a pump discharge port 211 through which the washing water is discharged, and the pump discharge port. It is configured to include a front casing 270 is formed with a pump suction port (212).

Here, the impeller is accommodated in the impeller housing 240, the rear of the impeller housing 240 is preferably fixed to the washing motor 230, the impeller 250 is connected to the washing motor 230 is rotatable It is provided. The washing motor 230 is made of a BLDC motor, the rear of the washing motor 230 is preferably fixed to the dishwasher frame by a fixed holder 300.

The impeller 240 is connected to the motor shaft 231 of the washing motor to rotate, and the connecting portion of the impeller 250 and the motor shaft 231 is provided with a sealing member 245 to prevent leakage of the washing water. In addition, the internal space of the impeller housing 240 is partitioned and communicated with the pump suction port 212 and the pump discharge port 211.

The front casing 270 is fastened directly to the front of the impeller housing 240, and the pump inlet 212 and the pump discharge port 211 are integrally divided into one casing, respectively.

Therefore, when the impeller 250 is rotated, the washing water introduced through the pump inlet 212 is pressurized in the impeller housing 240 and pumped through the pump outlet 211. Here, it is preferable to reduce the cross-sectional area of the pump outlet 211 than the cross-sectional area of the pump inlet 212, in order to smooth the flow of the pressurized fluid.

In addition, the front of the pump inlet is provided with a screen 260 for filtering the bulky dirt contained in the wash water flowing into the pump inlet. The center of the screen is provided with a through hole 261 through which the motor shaft 231 of the washing motor passes, and a plurality of through holes 265 through which the washing water flows are formed in the periphery of the through hole.

A coupling hole 263 is formed at an edge of the screen to allow the screen 260 to be screwed to the pump inlet 212, and a coupling boss 274 corresponding to the coupling hole in the pump inlet. Is formed to protrude. The coupling screw 293 provided at the front end of the screen is coupled to the coupling boss 274 formed in the front casing 270 after passing through the coupling hole 263.

In addition, a screen bearing 267 is provided on the inner circumferential surface of the through hole to reduce friction with the motor shaft 231, and a grinder that is combined with the motor shaft 231 at the front end of the screen to grind dirt while rotating. 280 is installed. The motor shaft 231 penetrating the grinder is fixed by the nut 290.

In the present embodiment, the grinder 280 has a streamlined shape, but the present invention is not limited thereto and may have any polygonal shape.

On the other hand, the pump inlet 212 is preferably made of a flat oval shape. This is to limit the height of the pump inlet 212 that should have a relatively large area to a certain level or less. A connector (127 of FIG. 4) formed in the sump to be coupled to the pump inlet 212 also has a shape corresponding to the shape of the pump inlet 212.

4 and 5, the fixing structure between the pump assembly and the sump is as follows.

The impeller housing 240 and the front casing 270 are formed with a plurality of holes 248 and 279 into which screws or bolts are inserted at predetermined intervals along the circumferential direction. In addition, a coupling part (not shown) to which the bolt is fastened is provided at the edge of the connector and the sump suction port formed in the sump.

Therefore, when the bolts penetrating the hole parts 248 and 279 are fastened to the fastening part, the impeller housing 240 and the front casing 270 are fixed to the side of the sump.

In addition, protruding suction guides 272 and discharge guides 271 are formed on the front side of the front casing 270, respectively. The suction guide 272 is inserted into the connector 127, the discharge guide 271 is preferably configured to be inserted into the sump suction port 126.

On the outer circumferential surfaces of the guides 271 and 272, grooves into which the waterproof rings 275 and 276 for preventing leakage of the washing water and the vibration rings 277 and 278 for preventing the vibration generated from the washing motor 230 are transmitted are respectively inserted. Is formed.

Accordingly, the pump assembly 200 is fixed to the side surface of the sump 120 by fastening the aforementioned bolt, the pump inlet is in communication with the connector, and the pump outlet is in communication with the sump inlet.

On the other hand, when the washing motor 230 is not stably fixed, leakage of the washing water occurs and very loud noise is generated. In order to prevent this, the rear of the washing motor 230 is preferably fixed to the base 100 by a fixed holder 300. Here, the dustproof packing member 310 is preferably provided between the rear of the washing motor 230 and the fixed holder 300.

As shown in FIG. 5, the fixing holder 300 is bent in an 'L' shape, and one side 330 is coupled to the rear of the thinning motor 230. In detail, the fixing holder 300 is preferably fastened by using a bolt or the like at the rear of the washing motor 230. In addition, in order to reinforce the strength of the bent portion of the fixed holder 300, a bead (330a) is preferably formed in the bent portion.

Meanwhile, the bent other side surface 320 of the fixing holder 300 is fixed to the base. To this end, holes 322 are formed in the other side 320 and the base 100, and the other side 320 of the fixing holder is fixed to the base 100 by fastening a screw to the holes 322. . In addition, the fixing holder 300 is provided with an alignment piece 321, and the screw fastening position is aligned as the alignment piece 321 is inserted into the base 100.

Referring to Figure 6, another embodiment in which the screen of the dishwasher according to the present invention will be described.

The structure of the pump assembly according to the present embodiment is substantially the same as that of the pump assembly described above. However, in this embodiment, unlike the above-described embodiment, the screen installed inside the pump assembly is hooked with the front casing.

More specifically, a hook 273 having a predetermined shape is protruded in the front casing 270 in which the pump inlet 212 is formed, and the screen 260 is formed in the hook and the pump inlet 212. Combined.

A through hole 261 through which the motor shaft 231 of the washing motor penetrates is formed in the center of the screen, and through holes 265 are formed around the through hole, and a screen bearing is formed on the inner circumferential surface of the through hole. 267 is provided. Here, the motor shaft penetrating the impeller 250 and penetrating the screen is fixed by the nut 290.

The screen may be provided with a coupling hole for a separate screw coupling, the coupling boss corresponding to the coupling hole may be formed in the pump inlet.

The present invention is not limited to the above-described embodiments, and those skilled in the art can make modifications without departing from the spirit of the present invention, and such modifications are within the scope of the present invention.

The dishwasher according to the present invention described above has the following effects.

First, according to the present invention, the assembly process is simple by combining the motor and the pump used in the dishwasher into a single pump assembly, and assembling the components provided in the pump assembly and then coupling the pump assembly to the sump. . Thereby, there is an advantage that the assembly time is shortened and the production phase of the product is improved.

Second, according to the present invention, by installing the pump assembly of the dishwasher on the side of the sump, it is possible to reduce the vibration of the pump assembly delivered to the sump, there is an advantage that the washing space inside the tub to wash dishes.

Claims (9)

Sump containing wash water; The front casing having an impeller for pumping the washing water, a washing motor for driving the impeller to circulate the washing water, a pump outlet for supplying the washing water into the sump, and a pump inlet for guiding the washing water discharged from the sump, the front A pump assembly coupled to a casing and having an impeller housing accommodating therein and communicating with the pump discharge port and the pump suction port, the pump assembly being installed outside the side of the sump; And, Is installed inside the front casing, dishwasher including a screen for filtering the dirt contained in the flowing washing water. The method of claim 1, And a waterproof ring installed between the sump and the front casing to prevent the washing water from leaking outside the side of the sump. The method according to claim 1 or 2, The pump discharge port is connected to the supply port of the sump, the pump suction port is connected to the connection port of the sump, the pump discharge port and the pump suction port, characterized in that provided in parallel. The method of claim 3, The screen is a dishwasher, characterized in that installed in the front of the pump inlet. The method according to claim 1 or 2, And a through hole through which the motor shaft of the washing motor passes, and a plurality of through holes through which the washing water flows in the periphery of the through hole. The method of claim 5, And a screen bearing installed on an inner circumferential surface of the through hole to reduce friction with the screen with the motor shaft. The method of claim 5, And a grinder which is rotated in combination with the motor shaft at the front end of the screen to grind dirt contained in the washing water. The method according to claim 1 or 2, And the coupling hole is formed in the screen to screw the screen to the pump inlet. The method according to claim 1 or 2, The screen is dishwasher, characterized in that coupled with the hook formed in the pump inlet.

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