CN101325903B - Dish washer - Google Patents

Abstract

A dish washer is disclosed. The dish washer has improved washing efficiency while being constructed in a compact structure. A general dish washer is an apparatus that injects wash water to dishes so as to wash the dishes, and dries and7or sterilizes the washed dishes. The washer according to the present invention includes a filter unit (170) filtering at least some of the wash water injected form a tub (1), fallen downward, and directed to a collection part of sump (20).

Description

dishwasher

technical field

The present invention relates to a dishwasher, and more particularly, to a dishwasher having improved washing efficiency while being constructed in a compact structure. A general dishwasher is a device that sprays washing water onto dishes to wash them, and dries and/or sanitizes the dishes.

Background technique

Fig. 1 is a schematic view showing the overall structure of a common dishwasher; Fig. 2 is an exploded perspective view showing a drive unit of the dishwasher shown in Fig. 1; Fig. 3 is a filter shown in Fig. 2 A top view of the liquid flow channel structure of the case; and FIG. 4 is a cross-sectional view showing wash water flow in the drive unit shown in FIG. 2 during a wash operation.

5 is a top view showing wash water flow in the filter housing shown in FIG. 2 during a washing operation; and FIG. 6 is a top view showing wash water flow in the filter cabinet shown in FIG. 2 during a draining operation.

First, a schematic structure of a general dishwasher will be described with reference to FIG. 1 .

A general dishwasher is constructed in a structure in which upper and lower washing arms 4 and 5 , upper and lower racks 6 and 7 , and a driving unit 10 are installed in a tub 1 .

The drive unit 10 is connected to the upper and lower connecting pipes 2 and 3 and the drain hose 9 through which the wash water is supplied to the upper and lower washing arms 4 and 5 respectively and passed through the drain hose 9 discharge. Upper and lower washing arms 4 and 5 are connected to upper and lower connecting pipes 2 and 3, respectively. The upper rack 6 is mounted on the upper wash arm 4 and the lower rack 7 is mounted on the lower wash arm 5 .

The upper and lower washing arms 4 and 5 are rotatably mounted on the driving unit 10 . The washing arms 4 and 5 are respectively provided with spray holes through which wash water is sprayed toward the corresponding racks. In addition, the lower wash arm 5 is provided with a spray hole through which wash water is sprayed toward the driving unit 10 so that food residues are removed from the filter of the drive unit 10 by the sprayed wash water.

Next, the structure of the driving unit of the dishwasher will be described in detail with reference to FIG. 2 .

The driving unit 10 includes a sump 20 for containing washing water, a heater 30 installed on the sump 20 for heating the washing water, a washing pump 41 installed on the sump 20 for sucking the washing water, and 42. Drainage pumps 51 and 52 installed on the sump 20 for draining the washing water, and guiding part of the sucked washing water to the washing arms 4 and 5 (see FIG. 1 ) and filtering the sucked washing water Filtration unit for residues.

The sump 20 has a wash water accommodating portion 21 which is a space for accommodating wash water, and a drain chamber 22 branched from the wash water accommodating portion 21 . The outside of the wash water containing part 21 is installed with a liquid flow channel control unit 25 . The liquid flow channel control valve 26 is axially coupled to the liquid flow channel control unit 25 .

The washing pump includes a washing motor 41 installed at the bottom of the sump for generating driving force, and an impeller 42 installed in the filter unit for sucking washing water. A wash pump 41 is axially coupled to a disposer 45 that rotatably crushes food debris. On top of the disposer 45 is placed a screen 46 with a predetermined mesh for filtering out large food residue particles.

The drain pump is installed on the drain chamber 22. The drain pump includes a drain motor 51 and a pump wheel 52 .

The filter unit includes a pump housing 60 having a space in which the pump wheel 42 is installed, a filter housing 70 installed so that the filter housing 70 covers the top of the pump housing 60, and a cover 80 installed so that the cover 80 covers the filter housing 70 and the top of the sump 20. The pump housing 60 is disposed at the bottom of the filter housing 70 , and the cover 80 is disposed at the top of the filter housing 70 .

The filter housing 70 has a dirt collection chamber 75 . The dirt collecting chamber 75 has a drain pipe 75 a which is connected to the drain chamber 22 . The drain pipe 75a protrudes downward from the bottom of the filter housing 70 by a predetermined length. Therefore, the drain pipe 75a is located in the drain chamber 22 when the drive unit is assembled.

The cover 80 has a filter 81 disposed corresponding to the dirt collection cavity 75 of the filter housing 70 and a plurality of collection holes 82 are formed outside the filter 81 . The collection hole 82 is connected with the sump 20 .

Hereinafter, the filter housing 70 in which the liquid flow passage control valve 26 is installed will be described in more detail in FIGS. 2 and 3 and especially in FIG. 3 .

The filter case 70 includes a washing water introduction part 72 configured so that the washing water sucked by the pump wheel is introduced into the washing water introduction part 72, and the liquid flow main channels 73a and 73b and the sampling liquid flow channel 74 Connected to the washing water introduction part 72. The dirt collection chamber 75 is connected to the sample flow channel 74 . The drain pipe 75a of the dirt collection chamber 75 is equipped with a switch valve for discharging washing water and food residues from the dirt collection chamber 75 to the drain chamber 22 (see FIG. 2)) during the draining operation.

In the above description, the sampling liquid flow channel 74 is a liquid flow channel formed to continuously filter foreign matter contained in the wash water collected in the sump 20 using part of the wash water introduced into the wash water introduction portion 72 .

The liquid flow passage control valve 26 is rotatably disposed in the wash water introduction portion 72 of the filter housing 70 for opening and closing the liquid flow main passages 73a and 73b. The liquid flow channel control valve 26 is axially coupled to the liquid flow channel control unit 25 (see FIG. 2 ) installed on the sump 20 . Opening and closing ribs 26 a for opening and closing the main liquid flow passages 73 a and 73 b are formed on the edge of the liquid flow passage control valve 26 .

The operation of the dishwasher constructed as above will now be described.

The dishwasher continuously or selectively performs a prewashing operation, a main washing operation, a rinsing operation, a heat-rinsing operation, and a drying operation in order to wash dishes. Between operations, a drain operation is performed. Hereinafter, the main washing operation and the draining operation will be described.

When the main washing operation is started, the washing motor is driven, thereby rotating the pump wheel 42 . As a result, as shown in FIG. 4 , the pump wheel 42 sucks wash water (including detergent) from the sump 20 to the wash water introduction portion 72 of the pump housing 60 (see FIG. 3 ).

At this time, the liquid flow path control unit 25 is rotated. As a result, the liquid flow path control valve 26 selectively opens one of the liquid flow main paths 73a and 73b under the control of the microprocessor. For example, as shown in FIG. 5, the liquid flow passage control valve 26 opens the liquid flow main passage 73a. Although not shown, the liquid flow passage control valve 26 can simultaneously open the liquid flow main passages 73a and 73b. That is, the opening state of the liquid flow main passage is changed based on the rotational position of the liquid flow passage control valve 26 .

Thus, under the microprocessor-based control of the liquid flow path control unit 25, most of the wash water introduced into the wash water introduction portion 72 is supplied to the upper and lower wash arms 4 through one of the opened liquid flow main paths 73a and 73b. and 5 both or one of the upper and lower wash arms 4 and 5. On the other hand, the remainder of the washing water is supplied to the dirt collection chamber 75 through the sample liquid flow channel 74 .

The liquid flow channel control valve 26 can be controlled so that the two main liquid flow channels 73a and 73b are simultaneously opened, and the wash water is thus supplied to both the upper and lower wash arms 4 and 5; so that only the main liquid flow channels 73a and 73b Once opened, the wash water is supplied to one of the upper and lower wash arms 4 and 5;

On the other hand, part of the wash water is always supplied to the sampling liquid flow channel 74 regardless of which liquid flow main channel the liquid flow channel control valve 26 is opened. This is because wash water must be continuously supplied to the sample liquid flow channel 74 to continuously filter out foreign substances from the wash water.

The washing water supplied to the dirt collection cavity 75 through the sample liquid flow channel 74 overflows through the filter 81 above the filter cavity 75 . At this time, the filter 81 filters foreign substances from the washing water.

The washed water filtered during the overflow and the washed water sprayed through the upper and lower wash arms 4 and 5 and dropped to the cover 80 are reintroduced into the sump 20 through the collecting hole 82 .

When the wash water flows through the sample liquid flow channel 74 for a short period of time, the amount of wash water flowing through the sample liquid flow channel 74 is small, so the filtering effect of the wash water through the sample liquid flow channel is significant. According to the present invention, however, wash water flows continuously through the sample liquid flow path 74 for a relatively long period of time during the main wash, so most of the wash water is sufficiently filtered.

After the washing operation is completed, the draining operation is started.

When the drainage operation is started, the drainage pumps 51 and 52 are driven. At this time, the wash water and food residues in the sump 20 are introduced into the drain pumps 51 and 52 by the suction force of the drain pumps 51 and 52 . Meanwhile, as shown in FIG. 6, the washing water and food residues in the dirt collection chamber 75 are also introduced into the drain pumps 51 and 52 through the drain pipe 75a. The wash water and food residues introduced into the drain pumps 51 and 52 are drained out through the drain hose 9 (see FIG. 1 ).

However, conventional dishwashers have the following problems.

First, the dishwasher has a problem that only part of the suctioned wash water is sprayed through the wash arm, and thus, the amount of wash water actually sprayed to wash dishes is significantly reduced, thereby reducing the washing efficiency of the dishwasher. Meanwhile, considering the amount of washing water circulated through the sample liquid flow channel to suck the washing water, it is necessary to increase the capacity of the washing pump to sufficiently maintain the amount of washing water sprayed.

Second, consideration needs to be given to: the amount of wash water that is adequately sprayed onto the dishes through the wash arm, the amount of wash water that is filtered during circulation through the sample flow channel, and the amount of wash water that is sprayed from the lower wash arm to the filter to remove food debris from the filter. The amount of washing water. As a result, the amount of wash water actually required during the washing operation of the dishwasher increases significantly.

Third, the wash water drawn from the sump is directly introduced into the dirt collection chamber through the sample liquid flow channel. As a result, a large amount of dirt is introduced into the dirt collection cavity, thereby clogging the filter of the cover. At the same time, when the filter is blocked, a large water pressure is applied to the dirt collection chamber, as a result, the washing water in the dirt collection chamber is discharged through the drain hose, thereby wasting the washing water. In addition, the filter may be damaged due to accumulated filter fatigue.

Fourth, when the wash water is wasted as described above, it is necessary to replenish the wash water. Meanwhile, when performing the heating-washing operation, supplementary washing water must be heated by a heater. As a result, washing water consumption and power consumption inevitably increase.

Fifth, the sample liquid flow channel and the dirt collection chamber are respectively formed to filter the washing water. Therefore, the flow path of the wash water is complicated. In addition, since the liquid flow path is complicated, the washing water suction pressure is significantly lowered. As a result, a wash pump with a higher capacity needs to be used.

Sixth, the washing pump is installed in a vertical driving manner, the disposer is installed to the shaft of the washing pump, and the dirt collection chamber is installed on the pump casing. As a result, the structure of the drive unit is complicated, and the height of the drive unit is significantly increased. In addition, it is necessary to reduce the internal space of the sump. In addition, due to the increase of the drive unit, the volume of the bucket is relatively reduced.

Seventh, the liquid flow path of the dishwasher is complicated, and food residues are left in the dirt collecting chamber and the filter during the draining operation of the dishwasher. Over time, leftover food residues can rot inside the dishwasher, causing bad smells. In addition, when food residues remain in various liquid flow channels such as dirt collection chambers, it is difficult to remove these food residues.

Disclosure of technical problems of invention

One object of the present invention is to solve the problems existing in dishwashers, it is possible to spray all the suctioned wash water to the dishes through the washing arm, thereby improving the washing efficiency of the dishwasher, allowing the use of small loads in the dishwasher wash pump and significantly reduces the amount of wash water actually required during the washing operation of the dishwasher.

Another object of the present invention is to solve the problems existing in a dishwasher, which can prevent washing water from being drained unnecessarily, thereby reducing washing water consumption and power consumption.

Yet another object of the present invention is to solve the problem in dishwashers, wherein the sample liquid flow path and the dirt collection chamber for filtering the wash water are omitted to simplify the wash water flow path, thereby reducing the The resistance of the washing water is significantly increased, and the washing pump with a small load can be used in the dishwasher.

Another object of the present invention is to solve the problems existing in dishwashers, in which the disposer and the screen are omitted to simplify the structure of the drive unit, thereby significantly reducing the height of the drive unit and increasing the inner space of the sump , and due to the reduction of the drive unit, the volume of the barrel is relatively increased.

Yet another object of the present invention is to solve the problems existing in dishwashers, which minimizes food residues remaining in the sump during the draining operation of the dishwasher and facilitates the cleaning of these filtered food residues.

Technical solutions

The object of the present invention can be achieved by providing a dishwasher comprising a sump for containing washing water; a pump wheel for generating suction to draw the washing water into the sump; A washing motor placed in a vertical drive structure, wherein the shaft of the washing motor is placed approximately vertically to provide rotational force to the pump wheel; a housing assembly having a liquid flow channel that guides the suctioned washing water to the washing arm; arranged to cover the set A cover at the upper end of the sump, and a filter unit provided in the sump to filter wash water falling to the cover through the cover and supply the filtered wash water to the sump.

The sump has a collecting portion for collecting and storing wash water.

The washing motor is preferably an outer rotor type brushless direct current (BLDC) motor.

The sump is preferably provided with a dirt holding chamber for holding the dirt filtered out by the filter unit, and the dirt holding chamber is connected with the drainage pump.

The dirt holding chamber is arranged at the bottom of the sump. The bottom of the dirt receiving chamber is preferably lower than the bottom of the collecting part.

The dirt receiving chamber is preferably inclined downwards towards the drain pump side.

The filter unit preferably has an open lower end, and the open lower end of the filter unit is coupled to the dirt receiving chamber.

The lower end of the filter unit may be spaced a predetermined distance from the bottom of the dirt receiving chamber.

Simultaneously, a discharge liquid flow channel is formed to connect the dirt receiving chamber and the drain pump to each other.

A drain cavity is formed in the sump so that the drain pump is mounted to the drain cavity. The drainage chamber and the dirt holding chamber are connected to each other through the discharge liquid flow channel.

The filter unit includes: an upper filter that filters large particles of dirt from wash water falling onto the cover through the cover, and a filter that is coupled to the upper filter and the dirt receiving chamber to filter dirt from the wash water that has passed through the upper filter. lower filter for small particles of debris. The lower filter has an open lower end.

The upper and/or lower filter is preferably removably mounted to the cover to enable a user to extract the filter and remove dirt from the filter.

The upper filter preferably protrudes a predetermined height from the top of the cover.

The cover is preferably sloped downwards towards the side of the filter unit.

It is preferable that a plurality of filter holes are formed in the cover to filter part of the wash water falling to the cover and guide it directly into the sump, and the filter holes are provided in the cover where the housing assembly is not placed.

The housing includes: a pump chamber in which a pump wheel connected to a washing motor is placed, and a liquid flow passage control chamber connected to the pump chamber, in which a liquid flow passage control valve is placed, and for guiding washing water from the liquid flow passage control chamber Main channel of liquid flow to corresponding wash arm.

The pump chamber and the flow channel control chamber are preferably located in the same plane.

The main liquid flow channel is arranged above the pump chamber and the liquid flow channel control chamber.

The housing assembly includes: a lower housing having a pump chamber and a flow passage control chamber; an upper housing coupled to the lower housing such that the top of the lower housing is covered by an upper housing having a main flow passage and a connection case coupled to the upper case such that the top of the upper case is covered by the connection case, and the connection case is also coupled to a connection pipe connected to the washing arm.

The liquid flow channel control valve preferably includes: a rotary shaft coupled to the motor shaft; and a liquid flow channel switch plate connected to an upper end portion of the rotary shaft, formed in a disc shape as a whole, and having a There are communication holes for selectively or simultaneously opening or closing the main passage of liquid flow, the communication holes have different areas and are formed at predetermined positions while the communication holes are spaced apart from each other.

According to the present invention, unlike the conventional dishwasher shown in FIG. 2 , the liquid flow path control valve includes a liquid flow path switch plate generally formed in a dish shape. Therefore, the load applied to the motor for turning the liquid flow path switch plate is greatly reduced, and the control speed is high.

According to the present invention, it is possible to improve the washing efficiency of the dishwasher and reduce the load of the washing pump, significantly reduce the amount of washing water actually required during the washing operation of the dishwasher, reduce the consumption of washing water and power consumption, reduce the circulation of liquid channel resistance, significantly increases the suction pressure of wash water, simplifies the structure of the drive unit, significantly reduces the height of the drive unit, increases the internal space of the sump, and minimizes the retention of food residue during the draining operation of the dishwasher in the sump.

beneficial effect

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

First, the present invention has the effect of spraying all the suctioned washing water to the dishes through the washing arm, thereby improving the washing efficiency of the dishwasher, reducing the load of the washing pump, and significantly reducing the washing operation of the dishwasher The actual amount of wash water required during this period.

Second, the present invention has the effect of preventing wash water from being discharged unnecessarily, thereby reducing wash water consumption and power consumption.

Thirdly, the present invention has the effect of simplifying the washing water flow channel by omitting the sampling liquid flow channel and the dirt collection chamber for filtered water, thereby reducing the liquid flow channel resistance, significantly increasing the suction pressure of the washing water, and Allows the use of wash pumps with reduced loads in dishwashers.

Fourth, the present invention has the effect of simplifying the structure of the drive unit by omitting the disposer and the screen, thereby significantly reducing the height of the drive unit, increasing the internal space of the sump, and relatively increasing the bucket while reducing the drive unit volume.

Fifth, the present invention has effects of minimally preventing food residues from remaining in the sump during draining operation of the dishwasher and facilitating cleaning of the filtered food residues.

Brief description of the drawings

The accompanying drawings, which are included to provide a further understanding of the invention, illustrate various embodiments of the invention and together with the description serve to explain the principle of the invention.

In the attached picture:

Fig. 1 is a schematic view showing the overall structure of a common dishwasher;

FIG. 2 is an exploded perspective view fully showing a driving unit of the dishwasher shown in FIG. 1;

Fig. 3 is a top view showing the liquid flow channel of the filter housing shown in Fig. 2;

4 is a cross-sectional view illustrating a flow of washing water in the driving unit shown in FIG. 2 during a washing operation;

FIG. 5 is a top view showing the flow of washing water in the filter housing shown in FIG. 2 during a washing operation;

FIG. 6 is a plan view illustrating wash water flow in the filter housing shown in FIG. 2 during a draining operation.

7 is an exploded perspective view showing the configuration of the dishwasher according to the present invention;

8 is a side sectional view illustrating a flow of washing water during a washing operation of the dishwasher shown in FIG. 7;

9 is a side sectional view showing a flow of washing water during a draining operation of the dishwasher shown in FIG. 7;

FIG. 10 is a detailed perspective view showing the housing assembly shown in FIG. 7;

Figure 11 is an exploded view of Figure 10;

12 to 14 are plan views showing the liquid flow main passage controlled according to the rotational position of the liquid flow passage control valve with the connecting housing removed;

FIG. 15 is a reference view of FIG. 12 showing a plan view of the case assembly with the upper case removed.

BEST MODE FOR CARRYING OUT THE INVENTION

Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

The dishwasher according to the invention comprises a sump 110 for containing wash water, a wash pump 120 for drawing wash water from the sump 110, with a liquid flow channel leading the drawn wash water to the wash arm The housing assembly 100 of 141 and 142 is arranged to cover the cover 160 of the upper end of the sump 110, and is arranged in the sump 110a to filter the washing water falling on the cover 160 through the cover 160 and guide the filtered washing water into the sump. The filter unit 170 of the liquid tank 110, and the drain pump connected to the filter unit 170 for discharging the dirt filtered by the filter unit and the washing water in the sump 110 to the outside during the draining operation of the dishwasher 180.

A heater for heating wash water is preferably installed in the sump 110 . The heater is not shown in FIG. 7 . Of course, the heater can be installed at the bottom of the barrel.

The sump 110 has a dirt receiving cavity 111 for accommodating dirt filtered by the filter unit 170 . The dirt holding chamber 111 is connected with the drain pump 180 . The dirt holding chamber 111 is preferably installed at the bottom of the sump 110 . More preferably, the dirt holding chamber 111 is set to be inclined toward the drain pump 180 so that the dirt contained in the dirt holding chamber 111 can be easily discharged to the drain pump 180 .

The discharge liquid flow channel 112 is formed to connect the dirt receiving chamber 111 and the drain pump 180 to each other. The dirt holding chamber 111 and the drain chamber 113 are preferably connected to each other via the discharge liquid flow channel 112 .

A drain cavity 113 is formed in the sump 110 so that the drain pump 180 is mounted to the drain cavity 113 . The drainage chamber 113 has a space for placing the pump wheel and a space for sucking dirt.

The wash pump 120 includes a wash motor 121 for generating driving force and a pump wheel 122 axially coupled to the wash motor 121 . The washing motor 21 is installed in a vertical driving structure in which the shaft of the washing motor 121 is placed approximately vertically. The washing motor 121 is preferably an outer-rotor type brushless direct current (BLDC) motor.

The drain pump 180 includes a drain motor (not shown) and a pump wheel (not shown). The drain pump 180 is provided in a horizontal driving structure in which the shaft of the drain motor is placed approximately horizontally.

The housing assembly 100 includes: a lower housing 130; an upper housing 140 coupled to the lower housing 130 so that the lower housing 130 is covered by the upper housing 140; and a connection housing 150 coupled to the upper housing 140 and connected to the washing machine. Arm connection tube.

The coupling of the upper and lower housings 140 and 130 provides a pump chamber 131 in which the impeller 122 constituting the washing pump 120 is placed, and a fluid passage control chamber 132 connected to the pump chamber 131 in which a fluid passage control valve is disposed.

The upper case 140 has liquid flow main channels 141 and 142 for guiding wash water to corresponding wash arms.

The connection case 150 is coupled to the upper case 140 such that the liquid flow main channels 141 and 142 of the upper case 140 are covered by the connection case 150 . The connection case 150 is provided at opposite ends thereof with coupling parts coupled to a connection pipe (not shown) connected to the washing arm.

The lower case 130 and the upper case 140 are respectively configured as shown in FIG. 7 . Although not shown, the lower case 130 and the upper case 140 may be integrally configured.

Preferably, the pump chamber 131 and the liquid flow channel control chamber 132 are placed on the same plane. This is because the height of the case assembly 100 is reduced and the inner space of the sump 110 is increased. Main flow channels 141 and 142 are also preferably placed above pump chamber 131 and flow channel control chamber 132 . This is because the width of the case assembly 100 is reduced.

The cover 160 covering the sump 110 is preferably arranged (see FIG. 8 ) to be inclined toward the filter unit 170 so that dirt and washing water dropped on the cover 160 can easily flow toward the filter unit 170 .

A plurality of filter holes 161 are preferably formed in the cover 160 to filter part of the wash water falling on the cover 160 and direct it into the tub. More preferably, the filter hole 161 is provided in the cover 160 where the housing assembly 100 is not placed, thereby reducing contamination of the outer surface of the housing assembly due to dirty wash water.

The filter unit 170 is constructed such that a lower end of the filter unit 170 is opened. The open lower end plate of the filter unit 170 is coupled to the dirt receiving chamber 111 . The lower end of the filter unit 170 is preferably a predetermined distance from the bottom of the dirt receiving chamber 111 . For example, a stepped portion 111a is formed at an upper end portion of the dirt receiving chamber 111 so that the opened lower end portion of the filter unit 170 can be supported by the stepped portion 111a. Below the stepped portion 111 a of the dirt receiving chamber 111 is placed a drain liquid flow path 112 . Therefore, the dirt in the dirt receiving chamber 111 is discharged to the drain chamber 113 through the discharge liquid flow channel 112 without being hindered by the filter unit 170 .

The filter unit 170 includes: an upper filter 176 installed by the cover 160 for the dirt and wash water falling on the cover 160 to pass therethrough; The lower filter 171 that filters the water out of dirt. The lower filter 171 has an open lower end.

Preferably, the upper filter 176 and/or the lower filter 171 are detachably connected to the cover 160 . The upper filter 176 is used to filter out large food residue particles, while the lower filter 171 is used to filter out small food residue particles that have not been filtered out by the upper filter 176 .

The upper filter 176 preferably protrudes from the top of the cover 160 by a predetermined height. This is because the user can easily extract the upper filter 176 when clamping the upper filter 176, as long as the user can easily extract the upper filter 176 when clamping the upper filter 176, the upper filter need not be removed from the cover. of the top protrudes.

The liquid flow channel control valve 190 includes a rotating shaft 191 coupled to the control motor 200 and a liquid flow channel switch plate 192 arranged on the upper end of the rotating shaft 191 and generally forming a disc shape. The switch plate also has communication holes 192a and 192b for When the liquid flow channel switch plate 192 is turned, the main liquid flow channels 141 and 142 are selectively opened or closed simultaneously. Since the liquid flow main passages 141 and 142 are disposed above the liquid flow passage control valve 190, the liquid flow passage control valve 190 is formed into a dish shape. Meanwhile, the liquid flow passage control valve 190 is constructed to apply the suction pressure of the washing pump 120 upward. Therefore, when the suction pressure is applied, the liquid flow passage control valve 190 is pressed to the upper housing 140, thereby stably supporting the liquid flow passage control valve 190 without shaking.

The communication holes 192a and 192b formed in the liquid flow channel switch plate 192 have different areas. Therefore, the liquid flow main channels 141 and 142 may be selectively controlled based on the rotational position of the liquid flow channel switch plate 192 .

The operation of the dishwasher having the above configuration according to the present invention will now be described. The dishwasher continuously or selectively performs a prewashing operation, a main washing operation, a rinsing operation, a heat-rinsing operation, and a drying operation in order to wash dishes. Between operations, a drain operation is performed. Hereinafter, the main washing operation and the draining operation will be described.

First, the washing operation of the dishwasher will be described in detail with reference to FIGS. 8 , 11 and 12 to 14 .

When the washing motor 121 is driven, the pump wheel 122 rotates. As a result, wash water is supplied from the sump 110 to the pump chamber 131 and the liquid flow path control chamber 132 .

At this time, the liquid flow channel control valve 190 is turned so that the liquid flow main channels 141 and 142 communicate with the liquid flow channel control chamber 132 . Here, the liquid flow channel control valve 190 may selectively open one of the liquid flow main channels 141 and 142 or simultaneously open the liquid flow main channels 141 and 142 . Alternatively, the liquid flow channel control valve 190 may open the main liquid flow channels 141 and 142 alternately.

When the liquid flow main channels 141 and 142 are turned on, wash water is supplied to the corresponding wash arm from the liquid flow channel control chamber 132 along the liquid flow main channels 141 and 142 so that the wash water can be sprayed through the wash arms.

For example, when the liquid flow channel switching plate 192 of the liquid flow channel control valve 190 is placed as shown in FIG. 12, wash water is supplied to the upper wash arm 4 (see FIG. 1) through the liquid flow main channel 142. When the liquid flow path switch plate 192 of the liquid flow path control valve 190 is placed as shown in FIG. 13, wash water is supplied to the lower wash arm 5 (see FIG. 1) through the liquid flow main path 141. When the liquid flow path switch plate 192 of the liquid flow path control valve 190 is placed as shown in FIG. 14, wash water is supplied to the upper and lower wash arms 4 and 5 through the liquid flow main paths 141 and 142.

Unlike conventional dishwashers, the dishwasher according to the invention is not provided with a sample flow channel. Because of this, all the aspirated wash water is supplied to the wash arms. As a result, the amount of wash water sprayed to the dishes increases, and substantially all of the sucked wash water is used for washing the dishes. Therefore, it is possible to employ a wash pump 120 in the dishwasher according to the present invention which has a smaller load than conventional dishwashers. At the same time, the consumption of wash water is significantly reduced. In addition, the dishwasher according to the invention simplifies the flow path of the wash water compared to conventional dishwashers. Accordingly, liquid flow channel resistance of wash water is reduced, so that the dishwasher according to the present invention enhances suction efficiency although the load capacity of its wash pump 120 is the same as that of a conventional dishwasher.

The wash water sprayed from the wash arm washes dishes and falls onto the cover 160 . At this time, since the cover 160 is inclined toward the filter unit 170 , dirt and wash water falling on the cover 160 are introduced into the upper filter 176 . Meanwhile, part of the wash water is directly introduced into the sump 110 through the filter hole 161 of the cover 160 .

The upper filter 176 filters out large dirt particles, while the lower filter 171 filters out small dirt particles that are not removed by the upper filter 176 . Therefore, only dirt-free wash water is introduced into the sump 110 .

According to the present invention, unlike general dishwashers, there is no need to periodically clean the filter unit 170 during the washing operation of the dishwasher. Therefore, it is possible to provide the same sprayed amount of wash water as that of a conventional dishwasher although the amount of sprayed wash water is less than that of a conventional dishwasher. Furthermore, the consumption of wash water is significantly reduced.

A washing operation is performed for a predetermined time. As time elapses, the amount of food residues collected in the filter unit 170 gradually increases. After the washing operation is completed, the draining operation of the dishwasher is started.

Hereinafter, a draining operation of the dishwasher will be described with reference to FIG. 9 .

When the drain pump 180 is driven, the wash water in the sump 110 is introduced into the dirt receiving chamber 111 through the lower filter 171 by the suction force of the drain pump 180 . Next, wash water and dirt collected in the dirt receiving chamber 111 are introduced into the drain chamber 113 . At this time, since the dirt receiving chamber 111 is inclined toward the drain chamber 113 , dirt is smoothly introduced into the drain chamber 113 . Subsequently, the dirt and washing water in the drain cavity 113 are released to the outside through the drain hose of the drain cavity 113 .

According to the invention, the drain area (the liquid flow channel between the dirt receiving chamber 111 and the drain chamber 113) is significantly shortened compared to conventional dishwashers. As a result, hardly any dirt remains in the drainage area.

Due to the above-mentioned effects, the dirt collected in the dirt receiving chamber 111 is completely discharged to the outside during the draining operation of the dishwasher.

It will be apparent to those skilled in the art that various modifications and changes can be made to the present invention without departing from the spirit and scope of the invention. Accordingly, the present invention is intended to cover all modifications and changes that come within the scope of the appended claims and their equivalents.

Industrial Applicability

The invention provides a dishwasher. More particularly, the present invention provides a dishwasher having improved washing efficiency while being constructed in a compact structure. A general dishwasher is a device that sprays washing water onto dishes to wash them, and dries and/or sanitizes the dishes. The dishwasher according to the present invention includes a filter unit for filtering at least part of wash water sprayed from the tub, dropped, and guided to the collecting portion of the sump.

According to the present invention, it is possible to improve the washing efficiency of the dishwasher and reduce the load of the washing pump, significantly reduce the amount of washing water actually required during the washing operation of the dishwasher, reduce the consumption of washing water and power consumption, reduce the circulation of liquid channel resistance, significantly increases the suction pressure of wash water, simplifies the structure of the drive unit, significantly reduces the height of the drive unit, increases the internal space of the sump, and minimizes the retention of food residue during the draining operation of the dishwasher in the sump.

Claims (14)

1. dish-washing machine comprises:

Be used to hold the bucket of tableware;

Have the collecting tank of the part of collecting, described collection partly provides the space of collection and storing washing water;

Be arranged on the pump impeller that is used to aspirate washings on the described collection unit branch;

The washing motor of described pump impeller is installed and axially is coupled at vertical direction by the bottom of described collecting tank; Be arranged on a described side of collecting part, what be used to be filtered to small part is directed to the filter element of washings of the collection part of described collecting tank from described bucket; And be used to hold dirt container cavity by the dirt of described filter element filtering, wherein, described dirt container cavity is arranged on the bottom of described collecting tank, and described filter element opens wide in its bottom, so that the dirt of filtering is directed to the dirt container cavity.

2. according to the dish-washing machine of claim 1, it is characterized in that the bottom of described dirt container cavity is lower than described bottom of collecting part.

3. according to the dish-washing machine of claim 1, it is characterized in that described dirt container cavity has the blowdown stream passage.

4. according to the dish-washing machine of claim 3, it is characterized in that the bottom of described dirt container cavity is downward-sloping towards described blowdown stream passage.

5. according to the dish-washing machine of claim 1, it is characterized in that described filter element is easy to attached and dismounting.

6. according to the dish-washing machine of claim 1, it is characterized in that described filter element comprises:

Have unlimited bottom and be placed on lower filter in the described dirt container cavity; And

Top filter at washings dirt particle that filtering is big from washings before described lower filter is filtered.

7. according to the dish-washing machine of claim 6, it is characterized in that described top filter is placed in the described lower filter, so that described top filter can be attached to described lower filter and from its dismounting.

8. according to the dish-washing machine of claim 1, it is characterized in that, also comprise:

Cover the lid of described collecting tank, described lid has a plurality of filtering holes, partly is not directed to described collection part by described filter element from the washings of described bucket by described filtering holes.

9. dish-washing machine according to Claim 8 is characterized in that, described lid has the through hole with described filter element liquid flowing connection.

10. according to the dish-washing machine of claim 9, it is characterized in that described lid is downward-sloping towards described through hole.

11. the dish-washing machine according to claim 1 is characterized in that, also comprises:

Housing unit, described housing unit has

Divide the pump chamber that links to each other with described collection unit, described pump impeller is placed in the described pump chamber, and

The fluid course control room wherein is placed with the fluid course control valve that is used to control by the fluid course of the washings of described pump impeller suction.

12. the dish-washing machine according to claim 11 is characterized in that, described pump chamber and described fluid course control room are positioned at same level.

13. the dish-washing machine according to claim 11 is characterized in that, described fluid course control valve comprises:

Be coupled to the rotating shaft of the axle of described motor; And

Be connected to the upper end of described rotating shaft, totally form dish-shaped fluid course switchboard, it is used for optionally opening or closing fluid course when the fluid course switchboard is rotated.

14. the dish-washing machine according to claim 1 is characterized in that, described washing motor is outer-rotor brushless direct current (BLDC) motor.

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