KR100640853B1 - dish washer and method for controling the dish washer - Google Patents

Abstract

The present invention relates to a dishwasher, and more particularly, to a dishwasher and a method of controlling the same to prevent unnecessary waste of washing water.

To this end, the present invention, the drain pump for draining the washing water of the washing tank to the outside through the drain hose; A flow path guide housing having a dirt filter to filter the pumped wash water; Sampling flow channel for guiding a part of the pumped wash water to the waste filtration unit via the drain pump; A reflow flow path installed to discharge the washing water in the sampling flow path into a tub or a washing tank accommodating tableware when the water pressure of the dust filtering portion is greater than or equal to a predetermined pressure; And, as the washing water is discharged through the re-inlet flow path provides a dishwasher comprising a sensing means for determining whether the dirt filter blockage.

In addition, the present invention comprises the steps of performing a rinse stroke; Judging whether the dirt filtering part is blocked by the sensing means, and repeating the rinsing stroke a predetermined number of times until it is determined that the dirt filtering part is not blocked; And, if it is determined that the dirt filter unit is not blocked, the step of performing the final rinse once more: provides a control method of the dishwasher comprising a.

Dishwasher, Drainage Pump, Reflow Euro

Description

Dish washer and method for controling the dish washer}

1 is a block diagram showing a conventional dishwasher.

Figure 2 is a block diagram showing a problem in the washing administration of the dish washing machine of Figure 1;

3 is a block diagram showing the configuration of a dish washer according to the present invention.

4 is a block diagram showing the flow of the washing water when the water pressure is increased in the filth filtration chamber during the washing stroke of the dish washing machine of FIG.

5 is a block diagram showing the drainage of the dish washing machine of FIG.

6 is a flow chart showing a control method of the dishwasher according to the present invention.

Explanation of symbols on the main parts of the drawings

110: tub 111: washing arm

112: rack 120: washing tank

130: washing pump 140: drainage pump

150: flow path guide housing 151: dirt filtration chamber

152: filter unit 153: flow path control valve

160: sampling euro 170: reflow euro

175: sensing means 180: drain hose

190: drain passage 191: check valve

The present invention relates to a dishwasher, and more particularly, to a dishwasher and a method of controlling the same to prevent unnecessary waste of washing water.

A general dishwasher is a device for washing or / and drying dishware by spraying washing water onto the dishware.

Referring to Figure 1, it will be described with respect to the conventional dishwasher.

The dishwasher includes a tub 10 forming an inner space, a driving unit (not shown) disposed below the tub, a rack 12 for placing dishware, and dishware contained in the rack 12. It comprises a washing arm 11 for spraying. In this case, the driving unit performs a function of pumping and filtering the washing water. In addition, the driving unit and the cleaning arm is connected by a connection hose. In addition, the drive unit is provided with a flow path control valve 53 to selectively switch the washing water to a predetermined washing arm.

The driving unit includes a washing tank 20 in which washing water is accommodated, a washing pump 30 for pumping the washing water of the washing tank, a drain pump 40 for draining the washing water of the washing tank, and some of the pumped washing water. It comprises a flow path guide housing (50) for pumping to the arm (11) and filtering a portion. In addition, a heater (not shown) is installed in the washing tank 20 to heat the washing water.

At this time, the sampling flow path 60 is installed so that the washing water pumped from the washing pump 30 flows into the filtration chamber 51 via the drain pump 40. In addition, a drain flow path 70 is installed to discharge the wash water of the washing tank 20 to the drain pump 40 during the drain stroke, and the wash water of the drain pump 40 is installed in the drain flow path 70. The check valve 71 is installed to prevent backflow to the back side). In addition, the flow path guide housing is provided with a filter unit 52 so as to cover the upper side of the filtration chamber 51, the washing water passing through the filter unit 52 and the washing water dropped from the washing arm 11 washing tank A recovery hole (not shown) is formed to flow into the 20.

Referring to Figure 1, the operation of the above-described dish washer will be described.

The dishwasher selectively or serially performs a washing stroke, a rinsing stroke and a drying stroke. Between each of these strokes is a drainage stroke. In this case, the number of washing strokes and rinsing strokes is preset in the controller. Hereinafter, the washing operation will be described.

When the washing pump 30 is operated, some of the washing water of the washing tank 20 is pumped to the washing arm 11 to wash dishes of the predetermined rack 12. At this time, by operating the flow path control valve 53, the washing water is supplied to the predetermined washing arm 11 alone or simultaneously.

At the same time, some of the washing water of the washing tank 20 is introduced into the drainage pump 40 through the sampling flow path 60 together with the food waste. At this time, a large food waste is deposited in the drain pump. Thus, the wash water is primarily filtered in the drain pump 40. In this way, the washing water and some food waste of the drain pump is introduced into the waste filtration chamber 51, and the washed water thus introduced is filtered while passing through the filter unit 52.

The washing water passing through the filter unit 52 and the washing water separated from the washing arm 11 are recovered to the washing tank 120 through the collecting hole (not shown).

However, the above dish washer has the following problems.

First, since there is a large amount of food waste in the washing water at the beginning of the washing stroke, a large amount of dirt is introduced into the waste filtration chamber. Since the dirt blocks the filter part, the pressure of the washing pump is concentrated on the drain pump. When pressure is concentrated in the drain pump, the washing water of the drain pump is discharged to the outside through the drain hose as shown in FIG. Thus, there is a problem that the washing water is wasted unnecessary.

Second, since the replenishment is made again by the washing water discharged to the outside, and the replenishing washing water needs to be warmed again, there is a problem that power consumption is significantly increased.

Third, when the hydraulic pressure of the dirt filtration chamber acts on the filter for a long time, the filter part has accumulated a problem of fatigue accumulation.

Fourth, since the number of rinsing strokes is uniformly set in the controller, the rinsing stroke is uniformly performed a certain number of times regardless of the degree of contamination of the washing water. Therefore, despite the low contamination of the wash water, an unnecessary number of rinsing strokes are performed, resulting in waste water and power consumption. In addition, despite the high degree of contamination of the washing water, a small number of rinsing cycles are performed, which causes the dishware to be unsanitarily washed.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a dish washer and a method of controlling the same to prevent unnecessary waste of the washing water.

Another object of the present invention is to provide a dishwasher and a method of controlling the same, which reduce power consumption.

Still another object of the present invention is to provide a dishwasher and a method of controlling the same, which prevent deformation of the filter unit.

In order to achieve the above object, the present invention, a drain pump for draining the washing water of the washing tank to the outside through the drain hose; A flow path guide housing having a dirt filter to filter the pumped wash water; Sampling flow channel for guiding a part of the pumped wash water to the waste filtration unit via the drain pump; A reflow flow path installed to discharge the washing water in the sampling flow path into a tub or a washing tank accommodating tableware when the water pressure of the dust filtering portion is greater than or equal to a predetermined pressure; And, as the washing water is discharged through the re-inlet flow path provides a dishwasher comprising a sensing means for determining whether the dirt filter blockage.

The sensing means applies any one of a pressure switch, a pressure sensor, an optical sensor and a float switch.

Preferably, the predetermined portion of the reflow passage is disposed at a predetermined height higher than the dirt filtering portion, and the predetermined portion of the drain hose is disposed at a predetermined height higher than the high portion of the reflow passage.

In addition, the present invention comprises the steps of performing a rinse stroke; Judging whether the dirt filtering part is blocked by the sensing means, and repeating the rinsing stroke a predetermined number of times until it is determined that the dirt filtering part is not blocked; And, if it is determined that the dirt filter unit is not blocked, the step of performing the final rinse once more: provides a control method of the dishwasher comprising a.

In the step of repeating the rinse cycle, if the rinse stroke is repeated a predetermined number of times set in the control unit, it is preferable to stop the operation of the dishwasher. At this time, when the rinse stroke is performed a predetermined number of times in the controller, it is more preferable to display an error message.

In addition, after the final rinse stroke, it is preferable to perform a heating rinse stroke further by operating the heater in the washing tank.

Therefore, according to the present invention, it is possible to prevent waste of washing water, reduce power consumption, and prevent deformation of the filter part.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described.

Referring to Figure 3, it will be described in the dishwasher according to the present invention.

The dishwasher includes a drain pump for draining the washing water of the washing tank to the outside through a drain hose, a flow guide housing having a filtration unit for filtering the pumped washing water, and a portion of the pumped washing water to the filtration unit through the drain pump. The sampling flow path for guiding, the reflow flow path installed so that the washing water in the sampling flow path is discharged into the tub or the washing tank accommodating the tableware when the water pressure of the filtration unit is greater than or equal to a predetermined pressure, and the washing water is discharged through the reflow flow path. It is configured to include a detection means for determining whether the dirt filter unit is clogged.

 In FIG. 3, the tub is 110, the washing arm is 111, the rack is 112, the washing tank is 120, the washing pump is 130, the flow path guide housing is 150, the dirt filtration chamber is 151, the filter part is 152, and the flow path switching valve is 153. Since the above-described components are substantially the same as the conventional components, description thereof will be omitted.

The washing pump and the drain pump may be installed in the washing tank or installed separately from the washing tank. At this time, it is more preferable in terms of space utilization to install a washing pump and a drain pump in the washing tank. 3 illustrates only the structure in which the reflow channel is connected to the tub.

The sampling flow path 160 is configured to connect the washing pump 130, the drain pump 140, and the waste filtration chamber 151. For example, the sampling flow path is connected to a pump housing (not shown) constituting the wash pump and the drain pump.

The sampling flow path 160 may be formed inside the flow path guide housing 150 or may be formed as a separate pipe from the flow path guide housing 150. In addition, it is also understood that a part of the sampling flow path may be formed inside the flow path guide housing, and the other part may be formed as a separate pipe.

In addition, the reflow flow path 170 is connected to the sampling flow path section 162 between the drain pump 140 and the waste filtration chamber 151. In this case, the reflow flow path 170 is preferably a predetermined portion (P1) is disposed a predetermined height higher than the dirt filtration chamber (151) (H2-H1). For example, the discharge portion of the reflow flow path 170 is disposed a predetermined height higher than the upper end of the dirt filtration chamber 151. Accordingly, when the filter 152 of the dirt filtration chamber 151 is clogged, the washing water of the sampling flow path 160 is discharged into the tub 110 through the reflow flow path 170. Of course, the re-inlet flow path is not shown, it is also understood that it may be connected to the dirt filtration chamber.

As the sensing means, any one of a pressure switch, a pressure sensor, an optical sensor, and a float switch is applied. At this time, the sensing means is electrically connected to the control unit, and detects the washing water flows into the re-inflow path to provide the detected information to the control unit.

At this time, since the pressure switch and the pressure sensor provide information about the discharge of the washing water to the controller only when a predetermined pressure or more is applied to the reflow flow path, there is almost no restriction on the installation position in the reflow flow path. For example, when no washing water is discharged through the reflow channel or a small amount of the washing water is discharged, a static pressure is applied to the reflow channel. In addition, when a large amount of washing water is discharged through the reflow channel, dynamic pressure is applied to the reflow channel. At this time, the pressure switch and the pressure sensor provide this information to the controller only when dynamic pressure is applied. In addition, since the optical sensor and the float switch detect that the washing water is discharged into the tub through the reflow channel, it is preferable that the optical sensor and the float switch are installed in the discharge portion of the reflow channel. In this case, when the optical sensor and the float switch are installed, there is no need to distinguish between the static pressure and the dynamic pressure.

In addition, a drain hose 180 is connected to the drain pump 140. The predetermined portion P2 of the drain hose 180 is preferably disposed higher than the discharge portion of the reflow flow path 170. For example, the drain hose 180 bends a predetermined portion P2 and allows the bent portion P2 to be disposed higher than the discharge portion of the reflow flow path 170 (H4-H2). Of course, it is also understood that the discharge portion of the drain hose 180 may be disposed higher than the discharge portion of the reflow flow path 170. By the structure of the drain hose, even when the wash water is discharged through the re-inlet flow path 170, it is possible to prevent the wash water of the drain pump 140 is discharged to the outside through the drain hose 180. . In addition, it is preferable that the highly disposed portion P2 of the drain hose 180 is disposed at approximately half the height of the main body. In addition, it is not necessary to provide a check valve in the drain hose.

In addition, a drain passage 190 is installed to connect the washing tank 120 and the drain pump 140. In this case, a check valve 191 is installed in the drain passage 190 so as to open when the drain passage 190 is drained.

Referring to the operation of the embodiment according to the present invention described above are as follows.

Referring to Figure 3, it will be described with respect to the washing stroke of the dishwasher according to the present invention.

When the washing pump 130 is operated, some of the washing water of the washing tank 120 is sprayed to the washing arm 111 by the guide of the flow path guide housing 150. The washing water is sprayed from the washing arm 111 to wash the dishes, and the food waste of the dishes is recovered to the washing tank 120 together with the washing water.

In addition, some of the washing water pumped from the washing pump 130 flows into the drain pump 140. At this time, the large amount of food waste precipitates in the drain pump 140. Thus, the pump housing acts as a submersion tank.

Subsequently, the food waste and washing water not precipitated are introduced into the filtration chamber 151 through the sampling passage 160. The washing water of the filtration chamber 151 is filtered in the filter unit 152 and then recovered to the washing tank 120 through a recovery hole (not shown) of the washing tank 120. At this time, since the discharge portion of the reflow flow path 170 is disposed higher than the dirt filtration chamber 151 (H2-H1), the washing water of the sampling flow path 160 is to replace the reflow flow path 170 by the potential energy difference. The tub 110 is not discharged through. At this time, the washing water of the drain hose has a level of the top height (H1) of the dirt filtration chamber or slightly higher.

On the other hand, in the initial stage of the washing process, a large amount of food waste is contained in the washing water. Therefore, a large amount of food waste is introduced into the filth filtration chamber 151, and the filter unit 152 is blocked by the filtered food waste. When the filter unit 152 is blocked in this way, the water pressure of the washing pump 130 acts intensively on the drain pump 140 and the sampling flow path 160. At this time, the washing water of the sampling flow path 160 is discharged to the tub 110 through the reflow flow path 170 as shown in FIG. This is because the hydraulic pressure concentrated in the sampling flow passage 160 has increased so that the difference in potential energy between the discharge portion of the reflow flow passage 170 and the waste filtration chamber 151 can be exceeded. In addition, no washing water is discharged to the outside through the drain hose 180. This is partially resolved as the water pressure concentrated in the sampling flow path 160 is discharged into the washing tank 120 through the reflow flow path 170, so that the water pressure of the sampling flow path 160 reaches the highest point of the drain hose 180. It does not increase enough to exceed H4). In this case, the washing water of the drain hose is equal to or higher than the height H3 of the highest point of the reflowing flow path.

Referring to Figure 5, it will be described with respect to the drain stroke of the dishwasher according to the present invention.

When the drain pump 140 is operated, the washing water and food waste of the washing tank 120 is introduced into the drain pump 140. In addition, the washing water and food waste of the filtration chamber 151 is also introduced to the drain pump 140. Subsequently, the washing water and the food waste introduced into the drain pump 140 are discharged to the outside through the drain hose 180 by the pumping force of the drain pump. At this time, the washing water and the food waste are discharged to the outside beyond the highest point of the drain hose, the wash hose is drained all by the siphon phenomenon.

The control method of the dish washing machine according to the present invention described above will be described.

With reference to FIG. 6, the whole series of strokes of a dish washer is demonstrated. Here, it is also understood that only one administration of the several administrations may be performed according to the user's selection. In addition, drainage strokes are performed between the respective strokes, which are omitted in the flowchart.

First, the washing water is added to perform the priming washing stroke (S11). During the priming process, roughly rinse off the food debris on the tableware, and call the food debris on the tableware. The drainage stroke is performed after the priming washing stroke is completed.

Subsequently, this washing stroke is performed (S12). In this washing process, washing water containing detergent is sprayed onto the dishes. At this time, the dishes are washed clean by the friction of the washing water and the emulsification of the detergent.

After the wash stroke, a drain stroke is performed, and after this drain stroke, a rinse stroke is performed (S13). At the time of the rinsing stroke, it is determined whether the dirt filtering portion is blocked by the sensing means, and the rinsing stroke is repeated a predetermined number of times until it is determined that the dirt filtering portion is not blocked (S14).

That is, when the dirt filter part is blocked by the dirt, the washing water on the sampling flow path is discharged to the sump through the reflow flow path. At this time, since a predetermined pressure (for example, dynamic pressure) is applied to the reflow flow path, the sensing means senses this pressure and transmits it to the controller. If it is determined that the dirt filter is blocked, the rinse cycle is repeated once more. And if it is judged that the dirt filtration part is clogged again, the rinse stroke is repeated once again. The rinsing cycle is repeated until the dirt filter unit is not blocked. A drain stroke is performed between rinsing strokes.

Here, when the washing water contains less dirt, for example, when the food is less stained with food, or when the amount of dishes to be washed is small, the number of repetitions of the rinsing cycle will be reduced. In addition, if a lot of dirt in the wash water, the number of repetitions of the rinsing stroke will be increased. Therefore, the number of rinsing strokes can be properly adjusted according to the degree of contamination of the washing water.

When it is determined that the number i of the rinsing strokes is repeated by the limit number N preset by the controller, it is preferable to stop the operation of the dishwasher (S15). This is to prevent the rinsing stroke from being repeated unnecessarily and continuously when the food waste does not fall off due to a tight fit of the filth filter unit or when it is dried.

In this case, it is more preferable to display an error message so that the user can easily recognize it (S16). As such a display method, various methods that can be recognized by a user through an LCD window or an LED may be applied.

On the other hand, if it is determined that the dirt filter unit is not blocked, the final rinse stroke is performed once more (S17). During the final rinse stroke it is not determined whether the dirt filter is clogged. Therefore, the final rinse stroke is performed only once.

After the final rinse stroke, it is preferable to perform a heating rinse stroke (S18). At this time, a heater installed in the washing tank is operated to heat the washing water to a predetermined temperature. The dishware is sterilized and heated in such a heating rinse stroke.

After the heating rinsing stroke, a drying stroke is performed (S19). At this time, a separate heater (not shown) installed in the tub is operated. When the drying stroke is completed, the dishwasher is stopped.

Referring to the effect of the dish washing machine and the control method according to the present invention described above are as follows.

First, when the filter part is blocked at the beginning of the washing stroke, the washing water of the sampling flow path is discharged into the tub through the reflow flow path. Therefore, by partially releasing the water pressure intensively acting on the waste filtration chamber and the drain pump, there is an effect that can be prevented from unnecessary discharge of the washing water of the drain pump. As a result, even if the filter is abandoned at the beginning of the washing, there is an effect of preventing the discharge of the washing water.

Second, by preventing the washing water from draining during the washing stroke, there is an effect that can reduce the power consumption used to reheat the replenishing wash water as in the prior art.

Third, since the amount of dirt is reduced in the second half of washing, the washing performance is improved by filtering all the washing water.

Fourth, there is an effect that can prevent the filter portion from being deformed due to fatigue by the original prevention of the concentrated pressure of the hydraulic pressure in the dirt filtration chamber.

Fifth, the number of rinsing strokes is changed according to the amount of dirt. Therefore, when the degree of contamination of the wash water is low, by reducing the number of rinsing cycles, there is an effect of preventing waste of the wash water and reducing power consumption. In addition, when the degree of contamination of the washing water is high, by increasing the number of rinsing stroke, there is an effect that the dishes are washed clean.

Claims (7)

A drain pump for draining the washing water of the washing tank to the outside through the drain hose; A flow path guide housing having a dirt filter to filter the pumped wash water; Sampling flow channel for guiding a part of the pumped wash water to the waste filtration unit via the drain pump; A reflow flow path installed to discharge the washing water in the sampling flow path into a tub or a washing tank accommodating tableware when the water pressure of the dust filtering portion is greater than or equal to a predetermined pressure; And, And washing means for determining whether the dirt filter unit is clogged as the washing water is discharged through the reflow channel. The method of claim 1, The sensing means is a dishwasher, characterized in that any one of a pressure switch, a pressure sensor, an optical sensor and a float switch. The method of claim 1, The predetermined portion of the reflow flow path is disposed higher than the dirt filtration unit by a predetermined height, And a predetermined portion of the drain hose is disposed at a predetermined height higher than a high portion of the reflowing flow path. Performing a rinse stroke; Judging whether the dirt filtering part is blocked by the sensing means, and repeating the rinsing stroke a predetermined number of times until it is determined that the dirt filtering part is not blocked; And, If it is determined that the dirt filter unit is not clogged, performing the final rinsing step once more: control method of the dishwasher according to claim 1 comprising a. The method of claim 4, wherein In the step of repeating the rinse cycle, if the rinse stroke is repeated a predetermined number of times set in the controller, the control method of the dishwasher, characterized in that to stop the operation of the dishwasher. The method of claim 5, If an rinse stroke is performed a predetermined number of times in the control unit, an error message is displayed. The method of claim 4, wherein And after the final rinsing stroke, operating a heater in the washing tank to further perform a heating rinsing stroke.

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