KR100873144B1 - Method for controlling of dish washer - Google Patents

Abstract

The present invention relates to a control method of a dish washer having a steam generator for generating steam.

The control method of the dishwasher according to the present invention is a dishwasher including a steam generator for generating steam, the residual water removing step of removing the water in the steam generator, and the washing step of washing dishes using steam and washing water It may include.

Therefore, according to the control method of the dishwasher according to the present invention, not only can the dish be safely and efficiently washed, but also the residual water in the steam generator can be discharged while preventing damage to a predetermined pump for discharging the residual water.

Tub, steam generator, residual water discharge pump

Description

Method for controlling dish washer

1 is a cross-sectional view schematically showing an embodiment of a dish washer according to the present invention.

2 is a table showing the relationship between the steam operation cycle and the residual amount of impurities.

3 is a flow chart showing a control method of the dish washer according to an embodiment of the present invention.

4 is a flowchart illustrating a control method of a dish washer according to another embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

110: tub 120: door

130: control panel 200: sump

250, 260: water supply pipe 255, 265: water supply valve

280: steam supply pipe 300: steam generator

310: case 320: second heater

330: water level sensor 340: residual water discharge port

350: residual water discharge part

The present invention relates to a control method of a dish washer having a steam generator for generating steam.

A general dishwasher is a device that automatically washes dishes by spraying the washing water at a high pressure toward the dishes placed in the washing room to remove foreign substances such as food residues on the surface of the dishes.

One of the most important elements of a dishwasher is its ability to clean off food debris from the surface of the dishwasher. In order to improve the cleaning ability, it is necessary to increase the force to remove foreign substances on the surface of the dish, that is, the spray pressure of the washing water.

However, if the jet pressure of the washing water is too high, not only the dishes are damaged and fragile, but when the dishes are washed at a high jet pressure, the amount of washing water consumed to wash the dishes increases.

The present invention not only can safely and efficiently wash dishes, but also provides a control method of a dish washer that can reduce the use of the washing water.

In addition, the present invention provides a control method of a dish washer that can remove the residual water in the steam generator while preventing damage to a predetermined pump for residual water discharge.

The control method of the dishwasher according to the present invention is a dishwasher including a steam generator for generating steam, the residual water removing step of removing the water in the steam generator, and the washing step of washing dishes using steam and washing water It may include.

Here, the washing step may include a preliminary washing step of washing dishes using washing water and a main washing step of washing dishes using washing water and steam. In this case, the residue removal step is preferably made at the same time as the pre-washing step.

On the other hand, after the main washing may further include a residual water discharge step for discharging the water in the steam generator, in this case, the residual water discharge step is preferably mixed with cold water in the steam generator to discharge the water in the steam generator. .

The method may further include a drying step of drying the dishes after the washing step. In this case, the remaining water discharge step is preferably performed after the drying step.

In another aspect, a control method of a dishwasher according to the present invention includes a washing machine including a steam generator for generating steam, the washing step of washing dishes using washing water and steam, and removing water in the steam generator. It may include a residue removal step.

Preferably, the method may further include a cold water supply step of supplying cold water into the steam generator after the washing step.

On the other hand, after the washing step may further include a drying step for drying the dish, in this case, the residue removal step is made at the same time as the drying step, or after a predetermined time after the drying step, After the step, the temperature of the residual water in the steam generator may be checked and the temperature may be lower than a predetermined temperature.

Therefore, according to the control method of the dishwasher according to the present invention, not only can the dish be safely and efficiently washed, but also the residual water in the steam generator can be discharged while preventing damage to a predetermined pump for discharging the residual water.

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the dishwasher according to the present invention will be described in detail.

Referring to Figure 1, the structure of one embodiment for a dish washer according to the present invention will be described.

In the dishwasher according to the present invention, for example, the case 100 forming the appearance, the door 120 for opening and closing the case 100, the case 100 or the door so that a user can operate the dishwasher The control panel 130 mounted on the 120 is provided.

In the case 100, a washing room 150, which is a space in which dishes are stored and washed, is provided by the tub 110, and a sump 200 under which the washing water is stored is disposed below the tub 110. .

The sump 200 is provided with a pump 210 for pumping the washing water stored in the sump 200 and a filter (not shown) for filtering the contaminated washing water. In addition, the sump 200 is provided with a first heater 290 for heating the stored wash water.

The sump 200 is connected to a first water supply pipe 250 capable of receiving fresh water from an external water source and a drain pipe 270 for draining the washing water in the sump 200 to the outside. The water supply pipe 250 is provided with a first water supply valve 255 for controlling water supply to the sump 200.

In the tub 110, that is, the washing chamber 150, at least one spray arm for spraying water pumped by the pump 210 toward the at least one shelf is disposed.

For reference, in FIG. 1, an upper shelf 160 and a lower shelf 170 are disposed at upper and lower portions of the washing chamber, respectively, and the upper injection arm 230 and the lower injection arm 220 are respectively the upper shelf 160. And an example arranged to spray water pumped by the pump 210 toward the lower shelf 170. In addition, a top nozzle 240 for spraying water pumped by the pump 210 from the upper side to the lower side of the washing chamber 150 may be disposed above the washing chamber 150.

In the dishwasher according to the present invention, the washing chamber 150 is not only sprayed with the washing water by the pump 210 and the spray arms 230 and 220, but also steam is sprayed or supplied. To this end, the dishwasher according to the present invention is further provided with a steam generator 300 for generating steam for supplying to the washing chamber 150, the steam generator 300 is made of the sump (210) It is preferable to be driven separately from the first heater 290.

The steam generator 300 is in communication with the first water supply pipe 250 by the second water supply pipe 260 as shown in Figure 1, the washing chamber in the tub 110 by the steam supply pipe 280 ( 150). The second water supply pipe 260 is provided with a second water supply valve 265 for controlling the water supply into the steam generator 300.

The steam generator 300 has a case 310 for receiving the water supplied, a second heater 320 for heating the water contained in the case 310 and a water level sensor capable of detecting the water level in the case 310. 330 is provided. The water level sensor 320 may detect, for example, a low water level and a high water level.

The low water level is set to promote safety by preventing the second heater 320 in the steam generator 300 from being overheated, and is preferably set to a position higher than a position where the second heater 320 is installed. . The high water level is set to prevent water supplied into the steam generator 300 from overflowing from the steam generator 300.

In addition, the steam generator 300 may be provided with a steam supply valve (not shown) for controlling the opening and closing of the steam supply pipe 280 to supply steam at a desired time.

On the other hand, a control device (not shown) for controlling the dishwasher is electrically connected to the electrically operated components such as the control panel 130, the pump 210, and the steam generator 300 is dishwasher To control the driving.

For example, the controller controls the first heater 290, the second heater 310, the pump 210, the steam generator 300, and the like according to an operation mode of driving the dishwasher.

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

First, when the user intends to perform dish washing, the door 120 is closed by storing the dishes on the shelves 160 and 170.

Then, when the user operates the desired state of dish washing by operating the control panel 130 and starts the operation, the operation of the dish washer proceeds.

On the other hand, when the operation of the dishwasher centering on the flow order of the washing water flowing in the tub 110, the washing water sprayed from the injection arm 220, 230 and the top nozzle 240 is shelf 160 After washing the dishes placed in the) 170, it flows down to the sump 200 to fall downward. In addition, the washing water stored in the sump 200 is pressurized by the pump 210 and is again supplied to the injection arms 220 and 230 and the top nozzle 240.

As such, while the washing water is circulated from the sump 200 to the spray arms 220 and 230 and the top nozzle 240, food waste is filtered by a filter (not shown), so that the washing water is excessively contaminated or the nozzle is You can prevent clogging.

In addition, the dishwasher according to the present invention may include a washing process using steam. In order to perform the washing process using the steam as described above, the steam generated from the steam generator 300 is further supplied to the washing chamber 150 through the steam supply pipe 280.

Then, it can be expected to improve the washing efficiency of the dishwasher can be additionally obtained by the high temperature and high humidity of the steam. For example, when washing dishes using steam and washing water, dirt that is hardened on the dishes may be called by steam, and when high pressure washing water is sprayed in the state, dirt that is hardened on the dishes may be easily removed.

Therefore, according to the dishwasher according to the present invention, it is possible to remove the dirt and the like fixed to the tableware without increasing the injection pressure of the washing water, it is possible to safely and efficiently wash the dishes, and also reduce the use of the washing water. have.

Hereinafter, the operation of the steam generator 300 will be described briefly.

First, water is supplied into the case 310 by the second water supply valve 265 to supply steam to the washing chamber 150. At this time, when the high water level is detected by the water level sensor 330, the water supply to the case 310 is stopped.

In addition, the second heater 320 heats the water contained in the case 310 to generate steam, and the generated steam is supplied to the washing chamber 150 through the steam supply pipe 280.

At this time, the water level in the case 310 is reduced by the generation of steam, when the low water level is detected by the water level sensor 330, the operation of the second heater 320 is stopped. As described above, the reason why the second heater 320 is stopped when the water level in the case 310 is a low level is to prevent the second heater 320 from overheating and to promote safety.

When water is resupplied into the case 310 by the second water supply valve 265 and high water level is detected by the water level sensor 330, water supply is stopped and steam is generated by the second heater 320. Is generated.

In the operation of the steam generator 300 constituting the steam operation cycle as described above, as the steam operation cycle is increased, the amount of impurities in the case 310 may increase. Because, when the hardness of the water supplied to the steam generator 300 is high, lime (calcium carbonate (CaCO ₃ , etc.)) is precipitated when the calcium hydrogen carbonate (Ca (HCO ₃ ) ₂ ) dissolved in the water is heated. to be. In particular, the water in Europe and the Americas is a soft soft water, which can be severe.

That is, as the steam operation cycle is increased, the amount of impurities such as lime (calcium carbonate (CaCO ₃ ), etc.) deposited in the case 310 is increased. This increases, which may cause damage to the second heater 320 and failure of the steam generator 300. This is because corrosion of the second heater 320 may be caused by lime.

Therefore, it is preferable to remove calcium, magnesium ions, and the like dissolved in the residual water in the case 310 in advance to prevent precipitation of lime and the like.

To this end, the steam generator 300 according to the present invention is connected to the residual water discharge port 340 for discharging the water in the case 310 and the residual water discharge port 340 to discharge the water in the case 310 Residual water discharge pump 350 may be further provided.

In the present exemplary embodiment, the remaining water discharge pump 350 is discharged into the tub 110, that is, the washing chamber 150, but is not limited thereto. For example, the remaining water discharge pump 350 may be provided to discharge the remaining water in the case 310 to the drain pipe 270, or directly to the outside of the dishwasher.

2 is a chart showing the relationship between the steam operation cycle and the residual amount of impurities.

Here, the X-axis represents the number of steam operation cycles of the steam generator 300, the Y-axis represents the amount of impurities, such as lime deposited in the steam generator 300. A is a case where the residual water in the steam generator 300 is not removed, and B is a case where the residual water is removed.

As shown in FIG. 2, as the steam operation cycle of the steam generator 300 increases, the case where the residual water in the steam generator 300 is removed (B) is not the case (A). It can be seen that the amount of impurities deposited in the reactor is much smaller.

This is because when the residual water in the steam generator 300 is removed, calcium and magnesium ions dissolved in the residual water can be removed in advance, thereby preventing precipitation of lime or the like.

Therefore, removing residual water in the steam generator 300 is preferable because it can reduce the amount of impurities deposited in the steam generator 300.

However, when the residual water in the steam generator 300 is removed immediately after the steam is generated, the residual water discharge pump 350 may be damaged because the temperature of the residual water in the case 310 is high. This is because there is a part made of a material such as rubber in the residual water discharge pump 350 which may be deformed by the high temperature residual water.

In addition, in order to prevent deformation of the residual water discharge pump 350, it is not preferable to make all the components in the residual water discharge pump 350 made of a material that is not deformed even at a high temperature because the manufacturing cost increases.

Therefore, it is necessary to remove the residual water in the steam generator 300 while preventing damage to the residual water discharge pump 350.

Hereinafter, a control method of removing residual water in the steam generator 300 while preventing damage to the residual water discharge pump 350 will be described in detail.

3 is a flowchart illustrating a control method of a dish washer according to an embodiment of the present invention.

Referring to FIG. 3, the control method of the dish washing machine according to the present embodiment includes a residual water removing step (S100) of removing water in the steam generator 300, and a washing step of washing dishes using steam and washing water (S110). ) May be included.

That is, in the method of controlling the dishwasher according to the present embodiment, the step S100 of removing residual water in the steam generator 300 is performed before steam is generated. This is because the residual water contained in the steam generator 300 before the generation of steam has a low temperature.

Here, the washing step (S110) may include a preliminary washing step (S120) of washing dishes using washing water, and a main washing step (S130) of washing dishes using washing water and steam.

The preliminary washing step (S120) is a step of washing dishes using only washing water, and may wash dishes using washing water without detergent, or may wash dishes using washing water containing detergent. This pre-cleaning step (S120) is to roughly remove the dirt and the like on the tableware.

The main washing step (S130) is a step of washing dishes using steam as well as washing water, and washing the dishes by spraying the washing water and steam on the dishes at the same time. In another embodiment, the main washing step (S130) is a step of spraying only the washing water to the dish and the step of spraying only steam to the dish is made independently, the dish may be washed while repeating the two steps. As described above, when the dishes are washed using the washing water and the steam, dirt and the like fixed to the dishes can be easily removed.

At this time, the residue removal step (S100) is preferably made at the same time as the pre-washing step (S120). Then, since the separate time for the residue removal step (S100) does not take, the washing time of the overall dishwasher can be reduced. In addition, since the preliminary washing step 120 does not need to use steam, and thus the residual water temperature in the steam generator 300 is not high temperature, the residual water removing step S100 may be performed in the preliminary washing step S120. Even if made at the same time, the residual water discharge pump 350 is not damaged.

In addition, the control method of the dish washer according to the present embodiment may further include a residual water discharge step (S140) for discharging the water in the steam generator 300 after the main washing step (S130). Then, calcium and magnesium ions dissolved in the residual water in the steam generator 300 may be immediately removed after steam generation, and thus precipitation of lime may be further prevented.

Preferably, the remaining water discharge step (S140) may be made after mixing the cold water in the steam generator (300). After the main washing step (S130), because the residual temperature in the steam generator 300 is a high temperature, the residual water discharge pump 350 may be lost. Therefore, when the cold water is supplied into the steam generator 300 after the main washing step S130 to lower the temperature in the steam generator 300, the residual water may be discharged without damaging the residual water discharge pump 350.

As another embodiment, the residual water discharge step S140 may be performed after a predetermined time elapses after the main washing step S130. Here, the predetermined time is a time taken until the temperature in the steam generator 300 is lowered to a predetermined temperature such that there is no damage of the residual water discharge pump 350. In addition, a temperature sensor (not shown) is provided in the steam generator 300, the residual water discharge step (S140) is the temperature detected by the temperature sensor (not shown) of the residual water discharge pump 350 It may be done after checking whether there is no damage.

In addition, the control method of the dishwasher according to the present embodiment may further include a drying step (S150) for drying the dishes by supplying cold or hot air into the washing room 150 after the washing step (S110).

At this time, the residual water discharge step (S140) is preferably made after the drying step (S150). Because, if the residual water discharge step (S140) is made after the drying step (S150), the temperature in the steam generator 300 can be lowered after the washing step (S110) until the drying step (S150) is completed Because there is.

Preferably, the remaining water discharge step (S140) may be made after confirming the temperature detected by the temperature sensor (not shown) after the drying step (S150). That is, the residual water discharge step S140 may be performed when the temperature is less than a predetermined temperature by checking the temperature of the residual water in the steam generator 300 after the drying step S150. Here, the predetermined temperature is a temperature at which the temperature of the residual water in the steam generator 300 does not damage the residual water discharge pump 350 and may vary according to the residual water discharge pump 350.

In addition, the washing step (S110) may further include a rinsing step (not shown) for washing the dishes by spraying clean washing water containing no detergent to the dishes after the main washing step (S130). Since the rinsing step (not shown) is a step in which steam is not used similarly to the drying step (S150), the residual water discharge step (S140) may be performed after the rinsing step (not shown).

4 is a flowchart illustrating a control method of a dish washer according to another embodiment of the present invention.

Referring to FIG. 4, the control method of the dishwasher according to the present embodiment includes a washing step (S200) for washing dishes using washing water and steam, and water in the steam generator 300 after the washing step (S200). It may include a residual water removal step (S210) to remove.

The washing step S200 may include a preliminary washing step of washing dishes using washing water and a main washing step of washing dishes using washing water and steam as in the embodiment of FIG. 3. The detailed description uses the description in the above embodiment.

According to the control method of the dish washing machine according to the present embodiment, it is possible to immediately remove calcium, magnesium ions, etc. dissolved in the residual water in the steam generator 300 after steam generation, thereby further preventing precipitation of lime and the like.

On the other hand, the control method of the dish washer according to the present embodiment preferably further comprises a cold water supply step (S220) for supplying cold water in the steam generator 300 after the washing step (S200). After the washing step (S200) is a high temperature in the steam generator 300, if the residual water removal step (S210) is made immediately after the washing step (S200), the residual water discharge pump 350 is damaged This is because there is concern.

In addition, in the method of controlling the dish washing machine according to the present embodiment, the drying step of drying the dishes by supplying cold or hot air into the washing chamber 150 after the washing step S200 (S200). S230 may be further included.

At this time, the residue removal step (S210) is preferably made at the same time as the drying step (S230). Then, since the separate time for the residue removal step (S210) does not take, the washing time of the overall dishwasher can be reduced. And, since the residual water removal step (S210) is made after the cold water supply step (S220), because the temperature in the steam generator 300 is in a low state, the residual water removal step (S210) is the drying step (S230) At the same time, the residual water discharge pump 350 may not be damaged.

In addition, the residue removal step (S210) may be made after a predetermined time after the drying step (S230). Here, the predetermined time is a time taken until the temperature in the steam generator 300 is lowered to a predetermined temperature such that there is no damage of the residual water discharge pump 350.

In another embodiment, a temperature sensor (not shown) is provided in the steam generator 300, and the residual water removal step (S210) is detected by the temperature sensor (not shown) after the drying step (S230). The temperature of the residual water in the steam generator 300 may be made after checking whether or not the residual water discharge pump 350 is not damaged.

That is, the residue removal step (S210) may be performed when the temperature is less than a predetermined temperature by checking the temperature in the steam generator 300 after the drying step (S230). Here, the predetermined temperature is a temperature at which the temperature of the residual water in the steam generator 300 does not damage the residual water discharge pump 350 and may vary according to the residual water discharge pump 350.

As described above, if the residual water removal step (S210) is made after a predetermined time after the drying step (S230), or if the temperature is less than the predetermined temperature by checking the temperature inside the steam generator 300, the overall Reduce the cleaning time of your dishwasher. This is because, in the above case, it is not necessary to further include the cold water supply step (S220).

In addition, in the method of controlling the dishwasher according to the present embodiment, the washing step S200 is performed by spraying clean washing water containing no detergent onto the dishware after the main washing step S130. It may further include a rinsing step (not shown) for washing. In this case, the residual water removing step (S210) may be performed after checking the temperature of the residual water in the steam generator 300 after the rinsing step (not shown).

The present invention is not limited to the above-described embodiments, and can be modified by those skilled in the art as can be seen from the appended claims, and such modifications are within the scope of the present invention. That is, the step of removing the residual water in the steam generator 300 may be performed at the same time or after any step of the dish washing process of the dishwasher, as long as it can prevent damage of the residual water discharge pump 35.

According to the control method of the dish washing machine according to the present invention, not only can the dish be safely and efficiently washed, but also the use of the washing water can be reduced.

In addition, according to the control method of the dishwasher according to the present invention, it is possible to remove the residual water in the steam generator while preventing damage to a predetermined pump for the remaining water discharge, thereby reducing the amount of impurities deposited in the steam generator. .

Claims (11)

In the dishwasher comprising a steam generator for generating steam, Residual water removing step of removing the water in the steam generator; A preliminary washing step of washing dishes using the washing water; And And a main washing step of washing dishes using washing water and steam after the preliminary washing step. The remaining water removal step is a control method of the dishwasher, characterized in that the same time as the pre-washing step. delete delete delete In the dishwasher comprising a steam generator for generating steam, Residual water removing step of removing the water in the steam generator; A preliminary washing step of washing dishes using washing water and a main washing step of washing dishes using washing water and steam; And And a residual water discharge step of discharging water in the steam generator by mixing cold water in the steam generator after the main washing. The method according to claim 5, further comprising a drying step of drying the dishes after the washing step, wherein the remaining water discharge step is performed after the drying step. delete In the dishwasher comprising a steam generator for generating steam, A washing step of washing dishes using washing water and steam; A cold water supply step of supplying cold water into the steam generator after the washing step; And And a residual water removing step of removing the water in the steam generator after the cold water supplying step. The method according to claim 8, further comprising a drying step of drying the dishes after the washing step, wherein the remaining water removing step is performed simultaneously with the drying step. The method according to claim 8, further comprising a drying step of drying the dishes after the washing step, wherein the remaining water removing step is performed after a predetermined time has passed after the drying step. The method of claim 8, further comprising a drying step of drying the dishes after the washing step, wherein the residue removal step is to check the temperature of the residual water in the steam generator after the drying step, when the temperature is below a predetermined temperature Control method of the dishwasher, characterized in that made.

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