KR101938705B1 - Dish washer and method for controlling the same - Google Patents

Abstract

The present invention provides a storage tank provided with an electrolytic unit connected to a water collecting unit through a channel switching valve and electrolyzes the washing water in the storage tank through the electrolytic unit of the storage tank when the dishwasher is not operated to generate sterilized water, Disclosed is a dishwasher capable of improving the sterilizing capability of a dishwasher by circulating the dishwasher inside the dishwasher, and a control method thereof.
The present invention can suppress the growth of microorganisms remaining in the dishwasher and remove organic matter by using a sterilizing agent or hot water. In addition, the amount of cells in the dishwasher can be reduced to reduce the odor due to corruption.
In addition, since the dishwasher is automatically sterilized, the convenience of the user can be improved and the sterilizing agent can be prevented from remaining in the dishware before and after the sterilization stroke, so that the dishwasher can be safely used.

Description

[0001] Dishwasher and its control method [0002]

The present invention relates to a dishwasher and its control method for keeping the internal environment clean.

Generally, a dishwasher is a device that removes contaminants (food residue, etc.) from dishes by spraying cold water or hot water washing water at high pressure onto dishes.

The dishwasher includes a washing tank for washing the tableware, a plurality of baskets provided in the washing tank at a plurality of stages to store the dishes, a spray nozzle provided at the upper and lower portions of the plurality of baskets for spraying the washing water, And a pump for pumping with a nozzle.

In this dishwasher, when the dishware to be cleaned is stored in the basket, the washing water is supplied into the washing tank, and the pump is operated to move the washing water in the collecting unit to the spraying nozzle and spray the washing water to the tableware at a high pressure. Wash the dishware using.

That is, the dishwasher performs an irrigation stroke, a rinsing stroke, and a drying stroke to dry the washed dish, while supplying an appropriate amount of wash water into the dishwasher and circulating the wash water from the lower portion of the dishwasher to the upper portion thereof.

Such a dishwasher is characterized in that after completion of a series of cleaning processes such as a washing stroke, a rinse stroke and a drying stroke, the bacteria grow in the food waste and residue remaining in the filter, the collecting portion and the flow path in the washing tank due to the closed structure and the high humidity environment And there is a problem that odor is generated. This causes a discomfort to the user.

In the dishwasher, the amount of the bacteria is temporarily reduced through the high-temperature rinse water and the drying step for a short period of time in which the dishwasher is used. However, there is a problem in that the microorganism proliferates during the unused long time and causes internal contamination. Especially, when the inside of the dishwasher is not sterilized for a long time, the amount of the bacteria in the dishwasher rapidly increases.

In recent years, the dishwasher further includes an electrolytic unit installed on the water collecting side to perform sterilization. When the water level in the water collecting unit reaches a predetermined level or higher, the electrolytic water is electrolyzed to electrolyze the washing water.

In such a case, the dishwasher can sterilize the inside of the collecting part only when the level of the collecting part reaches a certain level or more, and the entire inside of the dishwasher can not be sterilized.

One aspect of the present invention provides a dishwasher for periodically performing an operation of sterilizing the dishwasher by circulating the generated sterilization water to the inside of the dishwasher, and a control method thereof.

In another aspect of the present invention, there is provided a dishwasher for use in a dishwasher as a preliminary washing water in which washing water is electrolyzed during an unsteady operation during operation of the dishwasher so as to increase detergent solubility and electrolyze the washing water, and a control method thereof .

Another aspect provides a dishwasher having any one of a heating section and a sterilizing agent storage section as a sterilizing section and a control method thereof.

A dishwasher according to one aspect of the present invention includes: a collecting part for collecting washing water in a washing chamber; A reservoir in which a portion of the wash water is stored; An electrolytic unit provided in the reservoir; A flow path switching valve for opening and closing a flow path between the collecting portion and the storage tank; A circulation pump circulating water stored in the collecting portion and the storage tank into the washing chamber; A control unit for controlling the operation of the electrolysis unit to electrolyze the wash water in the reservoir to generate sterilized water when the dishwasher is not operated and to control the operation of the flow path switching valve and the circulation pump so as to circulate the generated sterilization water into the dishwasher; .

According to another aspect of the present invention, there is provided a control method for a dishwasher, including a water collecting part for collecting washing water in a washing room, a storage tank for storing a part of the washing water, an electrolysis part provided in the storage tank, And a circulation pump for circulating the water stored in the reservoir and the reservoir to the inside of the dishwasher, characterized in that, when the dishwasher is not operated, the washing water stored in the reservoir is electrolyzed through the electrolysis unit, Generate; Sterilizing the inside of the dishwasher by circulating the generated sterilized water into the dishwasher; .

A dishwasher according to another aspect includes: a washing tub; A washing assembly in which water for washing the tableware housed in the washing tub flows; A sterilizing unit for generating sterile water; And a control unit for controlling the driving of the sterilizing unit to generate sterilizing water in the sterilizing mode and controlling the driving of the cleaning assembly such that the sterilizing water is circulated inside the washing tub and the washing assembly.

According to another aspect of the present invention, there is provided a control method for a dishwasher including a washing tub and a washing assembly for circulating water in a washing tub for washing dishes, the control method comprising: a sterilizing mode for washing and sterilizing the washing tub and the washing assembly The control unit controls the water supply unit to supply water to the water supply unit. The water supply unit heats the supplied water to generate sterilized water. When the sterilization water is generated by controlling the cleaning assembly, Is circulated and injected into the washing tub and the washing assembly, and when the circulation and the injection are completed, the drain portion is controlled to discharge the sterilizing water to the outside.

According to another aspect of the present invention, there is provided a control method for a dishwasher including a washing tub and a washing assembly for circulating water in a washing tub for washing dishes, the control method comprising: a sterilizing mode for washing and sterilizing the washing tub and the washing assembly The control unit detects the presence or absence of the tableware housed in the washing tub, receives the water by controlling the water supply unit, discharges the sterilizing agent to the supplied water to generate sterilized water, The sterilized water is circulated into the washing tub and the washing assembly, and when the circulation and the injection are completed, the drain portion is controlled to discharge the sterilized water to the outside.

According to an aspect of the present invention, there is provided a storage tank having an electrolytic unit and connected by a water collecting unit and a channel switching valve, electrolyzing the washing water in the storage tank through an electrolytic unit of the storage tank when the dishwasher is not operated, By circulating the inside of the dishwasher, the sterilizing ability of the dishwasher can be improved.

According to another aspect of the present invention, in the operation of the dishwasher, the washing water stored in the storage tank is sterilized by using an electrolysis unit and used as preliminary washing water, thereby increasing detergent solubility and electrolyzing the washing water.

According to another aspect, it is possible to inhibit the growth of microorganisms remaining in the dishwasher and to remove organic matter by using a sterilizing agent or hot water.

In addition, the amount of cells in the dishwasher can be reduced to reduce the odor due to corruption.

In addition, since the dishwasher is automatically sterilized, the convenience of the user can be improved and the sterilizing agent can be prevented from remaining in the dishware before and after the sterilization stroke, so that the dishwasher can be safely used.

Also, in the sterilization mode of the dishwasher, the preliminary sterilization stroke is performed prior to the main sterilization stroke, so that organic substances and microorganisms having weak binding force with the inner surface of the washing tank can be firstly separated from the inside of the washing tank and discharged to the outside. And to improve the cleaning and sterilizing performance of organic materials and microorganisms which are difficult to sterilize.

1 is a cross-sectional view of a dishwasher according to an embodiment.
2 is a control block diagram of a dishwasher according to an embodiment.
FIGS. 3A and 3B are flowcharts of control of the dishwasher according to an embodiment. FIG.
4 is a perspective view of a dishwasher according to another embodiment.
5 is an internal structural view of a dishwasher according to another embodiment.
6 is a control configuration diagram of a dishwasher according to another embodiment.
7 is a control flowchart of a dishwasher according to another embodiment.
8 is a view illustrating an example of a sterilization mode of a dishwasher according to another embodiment of the present invention.
9 is a control flowchart of a sterilizing stroke of the sterilizing mode of the dishwasher according to another embodiment.
10 is a control flow chart of the present sterilizing stroke of the sterilizing mode of the dishwasher according to another embodiment.
11 is a control flowchart of the rinsing cycle of the sterilizing mode of the dishwasher according to another embodiment.
FIG. 12 is a graph showing a comparison of the amount of cells, the amount of organic matter, and the amount of gas generated before and after the sterilization mode of the dishwasher according to another embodiment.
13 is a perspective view of a dishwasher according to another embodiment.
4 is an internal structural view of a dishwasher according to another embodiment.
15 is a control configuration diagram of a dishwasher according to another embodiment.
16A and 16B are flowcharts of control of the dishwasher according to still another embodiment.
Fig. 17 is a graph showing the amounts of bacteria and gas in the collection section before and after the sterilization mode of the dishwasher.
FIG. 18 is a graph of the amount of cells in the sterilization mode over time. FIG.

Hereinafter, the present invention will be described in more detail.

1 is a sectional view of a dishwasher according to an embodiment of the present invention.

1, the main body 110 of the dishwasher 1, the door 120, the washing tub 130, the cleaning agent storage unit 140, the machine room 150, the storage unit 160, A user interface 180, a drive module 190, a cleaning assembly 200, and a sterilizer 300.

1, the dishwasher 1 includes a main body 110 having an opening and an opening on one side, a door 120 rotatably provided on the main body 110 and opening and closing the opening, A washing tub 130 formed by the inner wall of the main body 110 and opened and closed by the door 120 and a cleaning agent storage unit installed in the door 120 so as to be able to open and close the main body 110, And a machine room 150 which is formed inside the main body 110 and is spatially separated from the cleaning chamber by the cleaning tank 130 and in which a part of the cleaning assembly is disposed.

The dishwasher (1) also includes a storage unit (160) for storing dishes.

Here, the storage unit 160 includes a plurality of baskets separated from each other in the washing tub 130 to separate the washing chamber into a plurality of storage spaces and slide back and forth, thereby facilitating the pulling-in of the dishes and the pulling out of the dishes.

The storage unit 160 includes a plurality of baskets 161 and 162 installed in upper and lower portions of the washing chamber, respectively, for storing dishes and the like.

The dishwasher 1 further includes a guide unit 170 for guiding the plurality of baskets to the inside or the outside of the washing chamber, a user interface 180 provided on the main body 110 for operating and displaying operation information of the dishwasher, A driving module 190 for controlling the operation of the dishwasher and driving various loads and a washing assembly 200 provided in the machine room 150 and the washing tub 130 to perform washing, .

The cleaning assembly 200 includes a water supply unit 210, a water collection unit 220, a heating unit 230, a filter unit 240, a circulation unit 250, a jetting unit 260 and a drainage unit 270 .

The water supply unit 210 includes a water supply pipe 211 located between an external water supply source and the water collection unit 220 and guiding the water introduced from the outside to the water collection unit 220 and a water supply valve 212).

The water collecting part 220 is formed at a predetermined depth so that the washing water and the dirt are accumulated in the lower part of the washing chamber 220 and stores the water introduced through the water supply pipe 211 or the washing water having been washed. In addition, the collecting unit 220 stores the cleaning agent discharged from the cleaning agent storage unit 140 in the cleaning mode.

That is, in the washing mode, the water in the water collecting part 220 is dissolved into the washing water, and the washing water circulates through the washing tub 130, the collecting part 220, the circulating part 250 and the spraying part 260.

More specifically, the water collecting unit 220 is connected to the circulation unit 250, and supplies water to the circulation unit 250 during the washing cycle, and also supplies water to the circulation unit 250 through the spray unit 260 When water flows in, the inflow water is stored again and supplied to the circulation unit 250 again.

In addition, a heat insulating material (not shown) is provided around the collecting part 220 to prevent the heat of water from being released to maintain the temperature of the water.

The heating unit 230 is located around the water collecting unit 220 and drives the water in the water collecting unit 220 by driving according to a command from the control unit 191a.

The filter unit 240 is installed inside the collecting unit 220 to filter the washed dirt.

That is, the filter unit 240 discharges only the washing water from the washing water mixed with the contaminants separated from the tableware, and stores the contaminants separated from the tableware.

The circulation unit 250 is provided between the water collecting unit 220 and the jetting unit 260 and pumps water in the water collecting unit 220 filtered by the filter unit 240 to the respective jetting nozzles 261, 262, and 263 A circulation pump 251 for pressurizing the water, and a circulation pipe 252 for guiding the pumped water to the jetting unit 260.

The circulation unit 250 circulates water in the water collection unit 220 by pumping water in the water collection unit 220 and supplying the water to the spray unit 260 through the circulation pipe 252.

The jetting section 260 includes a first jetting nozzle 261 provided at the inner lower portion, middle portion and upper portion of the cleaning chamber 12 for jetting water into the dishes accommodated in the plurality of baskets 161 and 162, A nozzle 262 and a third injection nozzle 263.

The first and second spray nozzles 261 and 262 are rotatably installed at the lower and middle portions of the washing tub 130 and the third spray nozzles are fixed to the upper portion of the washing tub 130. [

The drain portion 270 discharges the water in the collecting portion 220 to the outside. The drain portion 270 includes a drain pump 271 for pumping water in the water collecting portion 220 and a drain pipe 271 extending outward from the drain pump 271 and guiding the water pumped by the drain pump 271 to the outside, (272). In addition, the drainage unit 270 may further include a drain valve (not shown) for controlling the discharge of water from the water collection unit 220.

The dishwasher further includes a sterilizing unit 300 that generates sterile water.

The sterilizing unit 300 includes a branch pipe 310 branched from the water supply pipe 211, a storage tank 320 connected to the branch pipe 310, and a storage tank 320 installed inside the storage tank 320 to electrolyze water And an electrolysis unit 330.

The branch pipe 310 is branched from the water supply pipe 212 through the water supply valve 212. The water supply valve 212 is provided to switch the flow of water supplied into the water collection part 220 and the reservoir 320 It is the switching valve for the flow.

The water supply valve 212 includes a first flow path connecting the water collecting part 220 and the storage tank 320 and a second flow path connecting the water pipe 220 and the external water pipe, Thereby opening the second flow path.

The water supply valve 212 opens the first flow path and closes the second flow path so that the wash water stored in the water collecting part 220 flows into the storage tank 320 or the sterilized water in the storage tank 320 flows into the water collecting part 220 Respectively.

In addition, the water supply valve 212 closes the first flow path and opens the second flow path so that tap water from the external water pipe flows into the water collecting part 220.

In addition, the water supply valve 212 is divided into a first valve that opens and closes a first flow path connected between the water collecting unit 200 and the storage tank 320, and a second valve that opens and closes a second flow path connected between the water collecting unit and the water pipe It is also possible.

The electrolytic unit 330 electrolyzes water in the reservoir 320 to generate sterilized water.

Water electrolyzed in the electrolytic unit 330 exhibits a sterilizing effect. The electrolytic sterilization is a technique for sterilizing or extinguishing microorganisms remaining in water by allowing water to pass between electrodes having different polarities. (Cl2), hypochlorite ion (OCl-) and other sterilizing ions and free radicals.

Various oxidizing agents, such as hypochlorous acid, chlorine, chlorine dioxide and other chlorinated oxidants, are the most effective sterilizing agents used for hygiene purposes in household or industrial products.

The dishwasher operates the electrolysis unit 330 in the storage tank 320 to generate sterilized water in the storage tank 320 and circulates the sterilized water into the dishwasher so as to improve the sterilizing ability of the dishwasher when the dishwasher is not operated The washing chamber, the water collecting unit 220, the circulating unit 250, the spraying unit 260, the drainage unit 270, and the like.

In addition, the washing water stored in the storage tank 320 is sterilized through the electrolysis unit 330 so that the detergent solubility of the dishwasher can be increased and the washing water can be electrolyzed.

2 is a control block diagram of a dishwasher according to an embodiment of the present invention.

2, the dishwasher includes a user interface 180, a drive module 190, a cleaning assembly 200, and a sterilizer 300.

The user interface 180 receives information from the user and displays the input information and the driving information.

The user interface 180 includes an input unit 181 for receiving operational information such as various washing courses (for example, a standard course, a manual course, etc.) and addition of rinsing, a sterilization mode and a sterilization mode execution period from the user, Information related to the washing mode of the washing machine, and a display section 182 for displaying information related to the sterilizing mode.

The driving module 190 includes a control unit 191a, a driving unit 192a, and a storage unit 193a.

The control unit 191a performs an algorithm of a cleaning mode for washing the tableware or a sterilization mode for sterilizing the inside of the cleaning tank and the inside of the cleaning assembly.

The driving unit 192a drives the circulation pump 251, the drain pump 271 and the water supply valve 212 of the cleaning assembly 200 according to an instruction from the control unit 191a, (330) and the detector (340).

The storage unit 193a stores a reference amount of the water level in the reservoir for electrolysis, which is information related to the sterilization mode, a reference time, and the like.

The detection unit 280 is a water level detection unit for detecting the water level inside the storage tank 320, and is provided inside the storage tank 320.

More specifically, when the dishwasher is not operated, the control unit 191a generates sterilized water by operating the electrolytic unit 330 provided in the storage tank 320 regardless of the amount of water remaining in the water collecting unit 220. [ At this time, the control unit 191a detects the water level in the storage tank 320 and operates the electrolysis unit 330 if the remaining amount in the storage tank 320 is equal to or greater than the reference amount.

Here, the reference amount refers to the minimum quantity that can prevent the electrolysis unit 330 from overheating due to malfunction due to the shortage of water.

The control unit 191a generates sterilizing water and then opens the water supply valve 212 and drives the circulation pump 251 to supply sterilizing water in the storage tank 320 to the water supply pipe 211, the water collection unit 220, the circulation pipe 252 And the jetting unit 260, and sterilizes the entire inside of the dishwasher.

The sterilizing operation in the non-operation of the dishwasher can be performed by, for example, operating the electrolysis unit 330 for 10 to 30 minutes using an applied voltage of 12 V to 24 V, So that the contamination concentration of the microorganisms in the dishwasher can always be kept below a preset value.

For example, the sterilization performance of sterilized water generated by operating the electrolytic unit 330 increases with time and begins to exhibit a beneficial effect in the occurrence of more than 10 minutes, thereby significantly increasing the sterilization effect over 30 minutes of operation .

Since the residual organic matter remains after the washing of the dishwasher, the operation of the electrolysis unit 330 and the generation of the sterilization water may be hindered in the remaining amount of the dishwasher and the stored water. However, since the sterilization effect .

In addition, after a certain period of time after the sterilization treatment, the bacteria tend to start growing individually and recover the cell mass before sterilization after 1 day.

The same result is obtained even when sterilization is performed at a temperature higher than 80 ° C. In the case of a high temperature treatment, a pathogenic fungus having a high heat resistant property in a dishwasher can be easily adapted to high temperature heat, can do.

When the electrolytic unit 330 having the same or higher performance is used, the sterilization is more effective and less power consumption than the high temperature treatment.

In order to maintain the continuous sterilization effect, continuous radical generation and disinfection treatment of the unit interval are required. When one or more electrolytic devices are driven in a cycle of 1 to 3 days, the total number of bacteria in the dishwasher is controlled to be less than 1 log, Can be maximized.

In addition, the cation (H +) generated together with the sterilizing water in the electrolytic unit 330 acts to promote dissolution when the detergent in a powder state dissolves in water, When the radical generating water through the operation of the electrolytic generator is applied, the detergent solubility can be increased and the detergent activity can be increased.

In addition, in the electrolysis process, fine bubbles are generated by the gas generated by the combination of hydrogen and oxygen. Among various components of the detergent, substances such as carbonates which are not dissolved in water are dispersed by the fine bubbles, It reacts with the detergent component to increase the activity and increase the cleaning power. Since the increased detergent activity leads to improvement in washing performance, it is possible to exert the effect of improving both sterilization and cleaning performance through the application of the electrolytic disinfecting water.

The control unit 191a electrolyses the washing water stored in the storage tank 320 by operating the electrolysis unit 330 when the dishwasher operates and opens the water supply valve 212 and drives the circulation pump 251 Circulating sterilized water in the storage tank 320 and the introduced tap water.

At this time, a component (for example, hypochlorous acid, HClO) and a detergent activity promoting component (for example, cation, H +) capable of sterilizing the microorganisms in the washing water, which are components generated by the electrolysis unit 330, It is contained in tap water.

Thereafter, the control unit 191a performs a series of regular washing steps of preliminary washing, main washing and rinsing, and after the series of regular washing steps is completed, the water supply valve 212 is opened so that the last rinsing water is not discharged to the wastewater And the water supply valve 212 is closed after being stored in the storage tank 320 again.

Accordingly, the washing water stored in the storage tank 320 can be utilized for sterilizing operation when the dishwasher is not operated. Further, the washing water stored in the storage tank 320 can be utilized for the detergent dissolving and sterilizing operation in the subsequent operation of the dishwasher.

Hereinafter, the operation of the dishwasher according to one embodiment of the present invention will be described in detail.

FIGS. 3A and 3B are flowcharts of control of a dishwasher according to an embodiment of the present invention. FIG.

Referring to FIGS. 3A and 3B, first, the dishwasher determines whether the dishwasher is in operation (401).

If it is determined that the dishwasher is not operating in the operation mode 401, the dishwasher detects (402) the level of the storage tank 320 and determines whether the remaining amount of the storage tank 320 is equal to or greater than the reference amount based on the detection result )do.

If the residual quantity is greater than the reference quantity as a result of the determination in the operation mode 403, the electrolysis section 330 is turned on (404). Thus, the washing water in the storage tank 320 is sterilized to generate sterilized water.

At the same time, the dishwasher opens the water supply valve 212 (405) and turns on the circulation pump 251 (406). As a result, the sterilization water in the reservoir 320 is sterilized while circulating in the dishwasher.

After performing the sterilization operation for a preset time, the dishwasher turns off the electrolysis unit 330 and turns off the circulation pump 407.

Then, the dishwasher closes (408) the water supply valve 212 so that the dishwasher can be used as a preliminary washing water when the dishwasher is operated. Thus, the sterilization water is stored in the reservoir 320.

On the other hand, if the remaining amount is less than the reference amount as a result of the operation mode 403, the dishwasher turns off the electrolytic unit 330 so that the electrolytic unit 330 does not overheat due to malfunction due to insufficient water.

On the other hand, if it is determined in operation mode 401 that the operation of the dishwasher is started, the dishwasher detects 410 the level of the storage tank 320 and determines whether the remaining amount of the storage tank 320 is equal to or greater than the reference amount (411).

If the remaining amount of water is equal to or greater than the reference amount as a result of the operation mode 411, the dishwasher closes the water supply valve 212 (412) and turns on the electrolysis unit 330 (413). Thus, the washing water in the storage tank 320 is sterilized to generate sterilized water.

After generating the sterilized water for a predetermined time, the dishwasher opens the water supply valve 212 (414) and turns on the circulation pump 251 (415). Thereby, the sterilization water in the reservoir 320 is sterilized while circulating the inside of the dishwasher through the dishwasher.

As such, the sterilizing water in the reservoir 320 is used as the preliminary washing water. At this time, the water supply valve 212 is opened together with not only the flow path on the side of the storage tank 320 but also the water supply side channel connected to the water pipe, and receives tap water.

At this time, a component (for example, hypochlorous acid, HClO) and a detergent activity promoting component (for example, cation, H +) capable of sterilizing the microorganisms in the washing water, which are components generated by the electrolysis unit 330, It is contained in tap water.

After a predetermined reference time elapses, the dishwasher turns off the electrolysis unit 330 and closes the water supply valve 212 (416). At this time, the water supply valve 212 closes the flow path on the reservoir 320 and opens the water supply side flow path.

Thereafter, the dishwasher proceeds to a dish washing process (417) consisting of a preliminary washing process, a main washing process and a rinsing process.

In addition, the dishwasher determines whether the last rinsing cycle is completed (418) while the dishwashing cycle is being performed, detects the water level of the storage tank (320) when the last rinsing cycle is completed (419) The water supply valve 212 is closed 421 and the circulation pump 251 is turned off 422 if the remaining water amount is equal to or larger than the reference amount.

Accordingly, the last rinse water is not drained after the series of regular washing steps of preliminary washing, main washing, and rinsing is completed, and is used as preliminary washing water in the non-operation of the dishwasher to be utilized in the detergent dissolving and sterilizing operation. ).

On the other hand, if the remaining amount is less than the reference amount as a result of the operation mode 411, the dishwasher turns off the electrolysis unit 330 so that the electrolysis unit 330 does not overheat due to malfunction due to the shortage of water.

As described above, when the dishwasher is not operated, the sterilizing water is generated through the operation of the periodic electrolysis unit 330 in the storage tank 320 regardless of the remaining amount in the water collecting unit 220, It is possible to sterilize microorganisms that may occur in the dishwasher.

Particularly, in the conventional dishwasher, the microorganism concentration is more than 7 log (CFU / mL), which is generally harmful level. By periodically sterilizing the microorganism, the concentration of residual microorganisms is significantly lowered to 1Log (CFU / mL) The initial microbial concentration can be greatly reduced.

Lowering the initial concentration due to the exponential growth of microorganisms over time means that the decontamination performance can be greatly improved in terms of long-term dishwasher contamination.

In addition, heat-resistant microorganisms can be sterilized as compared with heat sterilization, so that recent heat-resistant pathogenic microorganisms can be sterilized.

In addition, microbubbles and positive ions (H +) that are generated together in the sterilization water generation process can be applied to the initial stage of washing to maximize the detergent dissolution and activity, thereby improving the washing performance.

FIG. 4 is a perspective view of a dishwasher according to another embodiment of the present invention. FIGS. 5A and 5B are internal structural views of a dishwasher according to another embodiment. The dishwasher 2 includes a main body 110, a door 120, A cleaning module 200, and a sterilizer 500. The cleaning module 200 includes a cleaning agent storage portion 140, a machine room 150, a storage portion 160, a guide portion 170, a user interface 180, a driving module 190, .

The washing unit 130, the cleaning agent storage unit 140, the machine room 150, the guide unit 170, and the user interface 180 of the dishwasher 2 according to another embodiment, Are the same as those in the first embodiment, and the description thereof is omitted.

The dishwasher (2) includes a storage section (160) for storing dishes.

The storage unit 160 includes first and second baskets 161 and 162 provided in the washing tank 130 and having holes of various sizes through which the water sprayed from the plurality of the spray nozzles 261, 262 and 263 is passed, 163).

The first basket 161 is located at a lower portion with respect to the bottom surface of the washing tub 130. The second basket 162 is located at the center of the washing tub 130. The cutter 170 is disposed at the bottom surface of the washing tub 130, As shown in FIG.

The first basket 161 receives a variety of dishes such as dishes, dishes and cooking utensils to be cleaned. The second basket 162 houses cups and the like. The cutlery 163 accommodates food such as a fork, a table knife, a spoon, , Esophagus, and ladle.

A first guide part 171 for supporting the second basket 162 and for drawing and pulling the second basket 162 to the inside / outside of the washing tub 130 according to the drawing direction is provided in the washing tub 130, And a second guide portion 172 for supporting the cutlery 163 and pulling out and drawing the cutlery 163 into / out of the washing tank 130 along the drawing direction.

The dishwasher 2 further includes a guide unit (not shown) that supports the first basket 161 and guides and draws the first basket 161 to the inside / outside of the washing tub 130 along the drawing direction.

The user interface 180 receives operation information related to the cleaning mode according to a command of the user and displays operation information and the like in progress.

Here, the washing mode includes at least one of a washing step of washing the dishware by spraying the washing water to the dishware, a rinsing step of spraying the rinsing water to the dishware to rinse the dishware, and a drying step of drying the tableware that has been rinsed.

Also, the user interface 180 receives the execution cycle of the sterilization mode and the sterilization mode, and displays information related to the sterilization mode.

Herein, the sterilization mode is a mode in which the sterilization water is circulated in the washing assembly 200, the circulating sterilized water is injected into the washing tub to sterilize the washing tub 130 and the washing assembly 200, And a rinsing stroke to remove sterile water in assembly 200.

The washing, pre-sterilization, and sterilization and rinsing stages may be performed in a water supply mode that is supplied with water for cleaning, sterilizing or rinsing, a circulation mode for circulating washing water, sterilizing water or rinsing water, heating the washing water, sterilizing water or rinsing water A drainage mode for draining the washing water, sterilizing water or rinse water to the outside, and the like.

The driving module 190 performs a cleaning mode for washing the tableware or a sterilization mode for sterilizing the interior of the cleaning tank and the cleaning assembly based on the operation information input to the user interface 180. [

The cleaning assembly 200 is a component for dishwashing and will be described in more detail with reference to Fig.

The cleaning assembly 200 includes a water supply unit 210, a water collection unit 220, a filter unit 240, a circulation unit 250, a jet unit 260, and a drainage unit 270. The same components as those in the embodiment are briefly described.

The water supply unit 210 includes a water supply pipe 211 located between an external water supply source and the water collection unit 220 and guiding the water introduced from the outside to the water collection unit 220 and a water supply valve 212).

The water collecting unit 220 stores the water introduced through the water supply pipe 211.

The water in the collecting section is used as washing water in the washing mode when the washing agent is dissolved, and is used as the rinsing water in the washing mode and the sterilization mode. In addition, the water in the collecting section is used as sterilization water in the sterilization mode of the sterilization mode and the sterilization cycle.

The washing water, the rinsing water or the sterilizing water circulates through the washing tub 130, the collecting unit 220, the circulating unit 250, and the spraying unit 260.

The filter unit 240 discharges only the washing water to the collecting unit 220 from the washing water mixed with contaminants separated from the tableware.

The circulation unit 250 is provided between the collecting unit 220 and the spraying unit 260 and pumps water into the collecting unit 220 and supplies the water to the spraying unit 260 through the circulation pipes 252 to 255.

The circulation unit 250 includes a circulation pump 251 for pumping water in the water collection unit 220, circulation pipes 252 to 255 for guiding the pumped water to the spray unit 260, 255, respectively, to control the circulation of the pumped water.

Here, the circulation pump 251 is also capable of pumping water supplied from outside in the water supply mode.

The circulation pipes 252 to 255 include a main pipe 252 for guiding water discharged from the circulation pump 251 and a first pipe 252 for branching at the main pipe 252 and guiding water to the nozzles 261 to 263 252, 254, and 255, respectively.

More specifically, the first branch pipe 253 branched from the main pipe 252 guides water to the first injection nozzle 261, and the second branch pipe 254 branched from the main pipe 252 The water is guided to the second injection nozzle 262, and the third branch pipe branched from the main pipe 252 guides the water to the third injection nozzle 262.

The first valve 256 is located in the first branch 253 and the second valve 257 is located in the second branch 254 and the third valve 258 is located in the third branch 255 Located.

The first valve 256 regulates the flow of water supplied to the first injection nozzle 261 in response to an instruction from the control unit 283 and the second valve 257 controls the flow of water supplied to the second injection nozzle 261, The third valve 258 regulates the flow of water supplied to the third injection nozzle 263 in response to a command from the control unit 283. [

The jetting unit 260 injects the water supplied through the circulation unit 250 toward the various dishes accommodated in the first and second baskets 150 and 160 and the cutlery 170.

The jetting unit 260 includes a first jetting nozzle 261 provided below the first basket 150, a second jetting nozzle 262 provided between the first basket 150 and the second basket 160, And a third injection nozzle 263 provided on the upper part of the cutlery 170.

The jetting section 260 includes a first rotor 264 provided in the first jetting nozzle 261 and rotated by the water pressure of the water supplied from the circulating section 250 and a second rotor 264 provided in the second jetting nozzle 262, A second rotor 265 rotated by the water pressure of the water supplied from the circulation unit 250 and a third rotor 266 provided in the third injection nozzle 263 and rotated by the water pressure of the water supplied from the circulation unit 250, .

That is, the first nozzle 261 is rotated by the rotation of the first rotor 264, the second injection nozzle 262 is rotated by the rotation of the second rotor 265, and the third rotor 266, the third injection nozzle 263 is rotated.

Here, the first injection nozzle 261 has a plurality of injection holes formed on its upper surface, and water is sprayed upward through the plurality of injection holes, and the second injection nozzle 262 has a plurality of injection holes formed on the upper and lower surfaces thereof The third injection nozzle 263 has a plurality of injection holes formed on a lower surface thereof and injects water in a downward direction through the plurality of injection holes.

That is, the first injection nozzle 261 receives water through the first branch pipe 253, the second injection nozzle 262 receives water through the second branch pipe 254, (263) is supplied with water through the third branch pipe (255).

The drain part 270 discharges the water in the water collecting part 220 to the outside. The drain portion 270 includes a drain pump 271 for pumping water in the water collecting portion 220 and a drain pipe 272 for guiding the pumped water to the outside.

The sterilizing unit 500 generates a sterilizing water for sterilizing the inside of the washing tub 130 and the washing assembly 200 in the sterilizing mode. The sterilizing unit 500 includes a detecting unit 510 (511, 512) and a heating unit 520.

Here, the sterilizing section 500 is capable of generating a sterilizing water to be used during the sterilizing stroke of the sterilizing mode, but it is also possible to generate a sterilizing water to be used during the presterilization stroke. At this time, the temperature of the sterilization water used in the pre-sterilization step is a sterilization number lower than the sterilization number used in the present sterilization stroke.

The detection unit 510 detects environmental information inside the washing tub 130 for performing the sterilization mode.

5A, the detecting unit 510 includes a table detecting unit 511 for detecting the presence or absence of tableware in the washing tub 130, a water level detecting unit 512 provided in the washing tub to detect the water level in the washing tub, And a temperature detector 513 provided in the water collecting unit 220 for detecting the temperature of water in the water collecting unit 220.

In order to improve the sterilizing performance of the sterilization mode, the dish detector 511 detects whether a tableware, which is a resistance element in the sterilization performance of the inside of the dishwasher, is housed inside the sterilization bath 130.

In this case, the dish detecting unit 511 includes any one of a sound wave sensor, an electromagnetic wave sensor, and a light sensor that is selectively located at the upper and lower portions of the washing tub and detects the dishes housed in the first basket, the second basket, and the cutlery .

For example, when the tableware detecting unit includes an optical sensor having a light emitting unit for outputting light and a light receiving unit for detecting the amount of output light, the controller determines that there is a tableware if the detected light amount is less than the reference light amount, If it exceeds the reference light amount, it is judged that there is no tableware.

As shown in FIG. 5B, the dish detecting unit 511 may be located in the first basket 161, the second basket 162, and the cutlery 163, respectively.

In this case, the dish detector 511 is located in the guide part 170 (171, 172) on which the second basket 162 and the cutlery 163 are mounted and detects the weight of the second basket 162 and the cutlery 163 And a weight sensor 511a.

The dish detector 511 further includes a weight sensor (not shown), which is located at a guide portion on which the first basket 161 is mounted and detects the weight of the first basket.

In this case, if the detected weight is equal to or greater than the reference weight, the control unit determines that there is a tableware in the cleaning tank. If the detected weight is less than the reference weight, the controller determines that there is no tableware in the cleaning tank.

The heating unit 520 is located around the water collecting unit 220 and drives the water in the water collecting unit 220 to a sterilizable temperature by driving according to a command from the control unit 191b.

Here, the heating unit 520 may use the heating unit 230 of one embodiment for heating the washing water to clean the tableware, or a separate heating unit may be used.

Further, when a heating unit for dishwashing and a heating unit for generating sterilized water are used, the two heating units may have different capacities from each other.

6 is a control block diagram of a dishwasher according to another embodiment. The dishwasher 2 includes a user interface 180, a driving module 190, a cleaning assembly 200, and a sterilizing unit 500.

The user interface 180 includes an input unit 181 for inputting operation information related to washing dishes from a user, and a display unit 182 for displaying operation information during dishwashing.

Also, the input unit 181 of the user interface 180 receives the execution cycle of the sterilization mode and the sterilization mode, and the display unit 182 displays information about the sterilization mode execution.

In addition, the display unit 182 of the user interface displays the presence or absence of the tableware housed in the cleaning tank before entering the sterilization mode.

Herein, the information on the sterilization mode execution includes information on the elapsed time of the sterilization mode, remaining time, etc., remaining administration information, schedule information of the next sterilization mode, and the remaining administration information includes information on the sterilization mode And the number of times of the rinsing operation.

The cleaning assembly 200 drives the water supply unit 210, the circulation unit 250 and the drainage unit 270 in accordance with a control command of the control unit 191b in the cleaning mode to collect water for washing, circulation, .

The cleaning assembly 200 circulates sterile water and rinse water in the sterilization mode. At this time, the inside of the cleaning tank and cleaning assembly 200 is cleaned and sterilized by the sterilizing water circulating the cleaning assembly 200, and the inside of the cleaning tank and cleaning assembly 200 is cleaned by the rinsing water circulating the cleaning assembly 200 Bacterial water is removed.

The sterilizing unit 500 drives the detecting unit 510 and the heating unit 520 according to a control command of the control unit 191b to generate water for sterilization.

Here, the detection unit 510 detects environmental information inside the washing tub for performing the sterilization mode.

The tableware detecting unit 511 detects the presence or absence of the tableware stored in the storage unit in the cleaning tank and transmits the detected information to the control unit 191b. The dish detector 511 includes at least one sensor such as a weight sensor, an acoustic wave sensor, an electromagnetic wave sensor, and an optical sensor.

The water level detection unit 512 detects the amount of water in the washing tub 130 or the water collecting unit 220 and transmits the detected information to the control unit 191b.

The temperature detection unit 513 detects the temperature of the water collected in the collection unit 220 and transmits the detected information to the control unit 191b.

Here, the water level detector 512 and the temperature detector 513 may be those previously provided for washing dishes, or may be separately provided for sterilization.

The detection unit 510 may further include an odor detection unit (not shown) for detecting the amount of odor due to gas or the like in the cleaning tank. Here, the odor detection unit (not shown) is a detection unit used when determining the execution time of the sterilization mode.

The driving module 190 controls and drives various loads to perform the cleaning mode and the sterilization mode, and includes a control unit 191b, a driving unit 192b, and a storage unit 193b.

The control unit 191b receives the operation information for washing dishes and the operation information for sterilizing the inside of the washing tub through the user interface 180 and controls the display of the inputted operation information and the operation information in progress.

The control unit 191b controls the opening of the cleaning agent storage unit 140 so that the cleaning agent is discharged when the operation information inputted to the user interface 180 is the cleaning mode, .

More specifically, the control unit 191b controls the driving of the water supply unit 210 in the cleaning mode, controls the closing of the water supply valve 212 based on the detected water level through the water level detection unit, 258 and 258 of the circulation unit 250 so that the water in the circulation unit 220 is circulated so that the water used for the cleaning is discharged to the outside when the washing mode is completed And controls the driving of the drain pump 271 of the drain portion 270.

The control unit 191b determines whether or not the dishwasher is stored in the washing tub when it is determined that the operation information inputted to the user interface 180 is the sterilization mode or the present time is the time to perform the sterilization mode. .

The control unit 191b controls the sterilizing and rinsing cycles for washing and sterilizing the washing tub and washing assembly after entering the sterilization mode.

More specifically, the control unit 191b controls driving of the water supply valve 212 and the heating unit 520 of the water supply unit 210 based on the information detected by the detection unit 510 so as to generate sterile water for the sterilization stroke Controls the driving of the circulation unit 250 so that the generated sterilizing water is injected when the sterilizing water is generated, and controls the driving of the drain unit 270 to discharge the sterilizing water to the outside when the sterilizing stroke is completed.

The control unit 191b turns on the circulation pump 251 and controls the valves 256, 257 and 258 to open and control the drain pump 271 when discharging sterilizing water.

Here, the sterilized water is contained in the inside of the washing tank as the reference water level, and the sour water has a reference temperature suitable for sterilization.

Further, the control unit 191b controls the driving of the water supply unit to control the driving of the circulation unit to circulate the rinsing water in order to receive the rinsing water during the rinsing operation, and controls the driving of the drainage unit to discharge the rinsing water do.

Here, the rinsing cycle of the sterilization mode can be performed before the sterilization stroke and after the sterilization stroke.

The driving unit 192b is configured such that the water supply valve 211 of the water supply unit, the circulation pump 251 of the circulation unit, the first valve 256, the second valve 256, The valve 257 and the third valve 258 are driven to drive the drain pump 271 of the drainage unit so that the water used for dishwashing is discharged to the outside.

The driving unit 192b drives the heating unit 520 to generate sterilized water in accordance with the control signal of the control unit 191b in the sterilization mode and controls the water supply valve 211 of the water supply unit, the circulation pump 251 of the circulation unit, The first valve 256, the second valve 257 and the third valve 258 are driven to drive the drain pump 271 of the drainage unit so that sterilizing water is discharged to the outside.

The storage unit 193b stores a predetermined sterilization cycle and a reference temperature of the sterilizable water in the present sterilization stroke.

The storage unit 193b stores a first reference water level and a first reference time appropriate for the pre-sterilization stroke, a second reference water level and a second reference time suitable for the pre-sterilization, a third reference water level suitable for the rinsing cycle, .

The first reference water level, the second reference water level, and the third reference water level may be the same water level or may be different water levels, and the first reference time and the third reference time may be the same time or different times.

The storage unit 193b stores the time and frequency of the main sterilization stroke in sterilization mode, the number of pre-sterilization strokes, and the number of rinsing strokes in sterilization mode.

When the number of pre-sterilization strokes is plural, the execution times of the respective pre-sterilization strokes may be the same or different, and even when the number of rinsing strokes is plural, the execution time of the respective rinse strokes may be the same, You may.

The storage unit 193b may also store a reference contamination degree for determining the number of pre-sterilization strokes and the number of rinsing strokes.

FIG. 7 is a control flowchart of the dishwasher according to another embodiment, which is described with reference to FIG.

As shown in FIG. 7, the dishwasher 2 determines (531) whether to proceed with the sterilization mode.

The determination of whether or not the sterilization mode is performed may be performed by determining whether the sterilization mode has been input to the user interface 180 or determining whether the current time is a predetermined sterilization cycle point or determining whether the smell detected by the odor detection unit And judging the time when the amount is equal to or greater than the reference amount to be the sterilization mode progress time point.

Next, the dishwasher 2 detects (532) a tableware in the washing chamber using the tableware detecting unit 511, determines (533) whether there is a tableware stored in the washing chamber based on the detected information, If it is determined that there is a stored tableware, the user is informed to take out the tableware (534), and informs the user to re-order the sterilization mode after the table is taken out.

On the other hand, when the dishwasher 2 judges that there is no dishwasher accommodated in the washing chamber, it enters (535) a sterilizing mode for sterilizing the washing tub and the washing assembly.

The dishwasher 2 sequentially performs the pre-sterilization step 536, the main sterilization step 537, and the rinsing step 538. Here, the pre-sterilization step can be selectively performed.

Referring to FIG. 8, the dishwasher 2 drains the water used in the pre-sterilization step after water at room temperature is supplied, the pre-sterilization step is performed by circulating and spraying the water supplied. This pre-sterilization step is performed twice.

Next, the dishwasher (2) receives the water at a room temperature, heats the water to a temperature capable of sterilization at high temperature, circulates and injects heated water to a temperature that is high enough to sterilize the paste, Drain the water used for the administration. This main sterilization step is performed once.

Next, the dishwasher (2) receives water at room temperature, circulates and injects the water to be rinsed, and drains the water used in the rinsing step. This rinse cycle is performed three times.

The rinsing cycle may be a predetermined number of times of rinsing, or a rinsing cycle of a predetermined time may be performed. Alternatively, a pre-sterilization cycle may be performed for a predetermined number of times or a predetermined period of time, It is also possible to determine the number of times of rinsing based on the degree of contamination information in the detected rinsing water.

Such pre-sterilization, main sterilization and rinsing steps will be described in detail with reference to Figs. 9 to 11. Fig.

The process of pre-sterilization is as follows. This will be described with reference to FIG.

9, the dishwasher 2 opens the water supply valve 212 of the water supply unit to supply water for pre-sterilization 541 from the outside and stores the water in the water collection unit 220 and the washing tank 130.

Next, the dishwasher 2 detects (542) the water level of the water supplied into the washing tub, compares the detected water level with the first reference water level, and determines whether the detected water level is the first reference water level (543).

Next, in the dishwasher 2, if it is determined that the detected water level in the cleaning tank is the first reference water level, the water supply valve is closed to stop the water supply (544).

Next, the dishwasher 2 turns on the circulation pump 251 and opens the first valve 256, the second valve 257 and the third valve 258 to open the washing tub 130 and the water collecting unit 220 The sterilizing water passes through the main pipe 252, the first branch pipe 253, the second branch pipe 254 and the third branch pipe 255 to the first injection nozzle 261, the second injection nozzle 262, And then is sprayed into the cleaning chamber through the first injection nozzle 261, the second injection nozzle 262, and the third injection nozzle 263 (step 545).

That is, the dishwasher 2 is configured such that sterilizing water in the washing tub 130 and the water collecting unit 220 is circulated through the circulating pump 251, the main pipe 252, the first branch pipe 253, the second branch pipe 254, The sterilizing water injected into the washing tub is returned to the washing tub 130 through the third branch nozzle 255, the first injection nozzle 261, the second injection nozzle 262 and the third injection nozzle 263, And sterilizing the inside of the washing tank 130 and the washing assembly 200 while circulating the sterilizing water to be collected in the water collecting unit 220.

Next, the dishwasher 2 compares the pre-sterilization time at which the pre-sterilization process is performed and the predetermined first reference time. At this time, when it is determined that the pre-sterilization time has passed the first reference time (546), the circulation pump 251 is turned off And closes the first valve 256, the second valve 257 and the third valve 258 to cause the circulation and injection of the sterilized water to stop (547).

Next, the dishwasher 2 turns on the drain pump 271 to discharge the sterilized water in the washing tub 130 to the outside (548).

Next, when the dishwasher 2 determines that all sterilized water in the cleaning tank has been discharged (549), the drain pump 271 is turned off to stop the drainage (550), and the pre-sterilization process is terminated.

By carrying out the preliminary sterilization process in this way, organic matter and microorganisms having low binding force with the washing tank can be primarily separated before the present sterilization stroke.

Also, prior to this sterilization stroke, the concentration of organic matter in the wash tub and wash assembly can be lowered, thereby improving the performance of the sterilization stroke in this sterilization stroke.

The procedure of this sterilization step is as follows. This will be described with reference to FIG.

When the dishwasher 2 enters the sterilization mode, the water supply valve 212 of the water supply unit is opened, water for sterilization is supplied 551 from the outside, and the water is stored in the water collection unit 220 and the washing tank 130.

Next, the dishwasher 2 detects (552) the water level of the water supplied into the washing tub, compares the detected water level with the reference water level, and determines whether the detected water level is the second reference water level (553).

Next, in the dishwasher 2, if it is determined that the detected water level in the washing tub is the second reference water level, the water supply valve is closed to stop the water supply (554), and the heating unit is turned on to heat water in the washing tub to generate sterilized water 555).

At this time, the dishwasher 2 detects (556) the temperature of the water being heated by using the temperature detector.

Next, the dishwasher 2 compares the temperature of the water in the washing tank with a predetermined reference temperature (Step 557). If the water temperature is the reference temperature, it is determined that the sterilization water generation is completed and the heating is stopped do.

Wherein the sterilizing water is water having a temperature of about 50 ° C to 90 ° C.

It is also possible to determine the completion of the generation of sterilized water based on a predetermined heating time without detecting the temperature of the water.

Next, the dishwasher 2 turns on the circulation pump 251 and opens the first valve 256, the second valve 257 and the third valve 258 to open the washing tub 130 and the water collecting unit 220 The sterilizing water passes through the main pipe 252, the first branch pipe 253, the second branch pipe 254 and the third branch pipe 255 to the first injection nozzle 261, the second injection nozzle 262, The second injection nozzle 262, and the third injection nozzle 263 so as to be sprayed into the cleaning chamber (step 558).

That is, the dishwasher 2 is configured such that sterilizing water in the washing tub 130 and the water collecting unit 220 is circulated through the circulating pump 251, the main pipe 252, the first branch pipe 253, the second branch pipe 254, The sterilizing water injected into the washing tub is returned to the washing tub 130 through the third branch nozzle 255, the first injection nozzle 261, the second injection nozzle 262 and the third injection nozzle 263, And sterilizing the inside of the washing tank 130 and the washing assembly 200 while circulating the sterilizing water to be collected in the water collecting unit 220.

Next, the dishwasher 2 compares the sterilization time at which the sterilization mode is performed and the predetermined second reference time. At this time, when it is determined that the sterilization time has passed the second reference time (559), the circulation pump 251 is turned off 1 valve 256, the second valve 257 and the third valve 258 to close the circulation and injection of the sterilized water (560).

Here, the reference time is about 15 minutes or more.

Next, the dishwasher 2 turns on the drain pump 271 to discharge the sterilized water in the washing tub 130 to the outside (561).

Next, the dishwasher 2 turns off the drain pump 271 to stop the drainage (563) when it is determined that all the sterilized water in the cleaning tank has been discharged (562), and then terminates the sterilization stroke.

The sterilization stroke here can be performed at least once.

The completion of discharge is determined based on the water level detected by the water level detection unit or based on a preset discharge time.

The procedure of the next rinsing cycle is as follows. This will be described with reference to FIG.

The dishwasher 2 opens the water supply valve 212 of the water supply unit to receive water for rinsing from the outside and stores the water in the water collecting unit 220 and the washing tub 130.

Next, the dishwasher 2 detects (572) the water level of the water supplied into the washing tub, compares the detected water level with the third reference water level, and determines whether the detected water level is the third reference water level (573).

Next, the dishwasher 2 closes the water supply valve to stop water supply (574) if it is determined that the detected water level in the cleaning tank is the third reference water level.

Next, the dishwasher 2 turns on the circulation pump 251 and opens the first valve 256, the second valve 257 and the third valve 258 to open the washing tub 130 and the water collecting unit 220 The rinse water is supplied through the main pipe 252, the first branch pipe 253, the second branch pipe 254 and the third branch pipe 255 to the first injection nozzle 261, the second injection nozzle 262, The second injection nozzle 262 and the third injection nozzle 263 so as to be sprayed into the cleaning chamber (575).

The rinsing water is sprayed from the cleaning assembly to the cleaning chamber inside the cleaning tank and the washing water is supplied to the cleaning tank 130 and the cleaning assembly 130 through the circulation process of the rinsing water so that the rinsed water is collected again in the cleaning tank 130 and the collecting portion 220 200). ≪ / RTI >

Next, the dishwasher 2 compares the rinsing time of the rinsing cycle with a predetermined third reference time. When it is determined that the rinsing time has elapsed since the third reference time (576), the circulation pump 251 is turned off The first valve 256, the second valve 257 and the third valve 258 are closed to allow the rinse water to be circulated and stopped to be stopped (577).

Next, the dishwasher 2 turns on the drain pump 271 so that the rinsing water in the washing tub 130 is discharged 578 to the outside.

Next, the dishwasher 2 turns off the drain pump 271 to stop the drainage (550) when it is determined that all the rinsing water in the cleaning tank has been discharged (579), and then ends the sterilization stroke. Here, the rinse water is water at room temperature.

The dishwasher 2 can also inform the user of information on the termination of the sterilization mode. It is also possible that the dishwasher 2 informs the user of the next sterilization mode schedule.

By performing the sterilization mode in this manner, the amount of cells in the dishwasher and the organic matter can be reduced, thereby reducing the odor due to corruption. This will be described with reference to FIG.

As shown in FIG. 12, when the bacterial count, organic matter (ATP), and odor amount were compared before and after the sterilization mode, the bacterial amount was 7 log / cm 2 before the sterilization mode but the sterilization power was 6 log / , And that the organic amount after the sterilization mode was reduced to less than 200 RLU.

Also, as the amount of organic matter and cell mass was decreased, the gas amount was also reduced by 90% after the sterilization mode was performed before the sterilization mode was performed.

FIG. 13 is a perspective view of a dishwasher according to another embodiment. FIG. 14 is an internal structural view of a dishwasher according to another embodiment. The dishwasher 3 includes a main body 110, a door 120, a washing tub 130, A cleaning agent storage unit 140, a machine room 150, a storage unit 160, a guide unit 170, a user interface 180, a driving module 190, a cleaning assembly 200, and a sterilizing unit 600 do.

The washing chamber 130, the cleanser storage section 140, the machine room 150, the storage section 160, the guide section 170, and the guide section 170 of the dishwasher 3 according to another embodiment of the present invention. And the user interface 180 and the cleaning assembly 200 are the same as those of the dishwasher 2 of the other embodiments, and the description thereof is omitted.

In addition, the cleaning assembly 200 may further include a heating unit 230 for heating water for washing dishes and a temperature detection unit (not shown) for detecting the temperature of the water for washing dishes, as in the embodiment.

The sterilizing unit 600 of the dishwasher 3 according to another embodiment includes a detecting unit 610 and a sterilizing agent storage unit 620.

The detecting unit 610 detects environmental information inside the washing tub 130 for performing the sterilization mode.

The detecting unit 610 includes a table detecting unit 611 for detecting the presence or absence of tableware in the washing tub 130, a water level detecting unit 612 provided inside the washing tub to detect the water level in the washing tub, And a sterilizing agent detection unit 613 for detecting the amount of the sterilizing agent.

Here, the disinfectant detection unit 613 may be located on the inner surface of the washing tub lower than the third reference water level of the rinsing water in the washing tub.

The bactericide detection unit 613 is a turbidity sensor for detecting the turbidity of the rinsing water, an electric conductivity sensor for detecting the electric conductivity of the rinsing water, or a pH sensor for detecting the pH of the rinsing water.

The fungicide storage part 620 is located on the inner surface of the door 120 and stores a sterilizing agent for sterilizing the inside of the washing tub and the washing assembly. And is located around the cleaning agent storage unit 140.

The sterilizing agent storage unit 620 includes a body 621 having a receiving space for receiving the sterilizing agent and a cover 622 for opening and closing the receiving space of the body 621 so that the user can insert the sterilizing agent into the receiving space of the body 621 And an opening and closing member 623 that closes the body 621 before the sterilization mode is performed and automatically opens the body 621 to discharge the sterilizing agent contained in the body 621 when the sterilization mode is performed.

The cleaning agent storage unit 620 may further include a guide pipe 624 for guiding the sterilizing agent in the body 621 to the collection unit 220.

Herein, the fungicide stored in the fungicide storage part 620 includes a chlorine-based fungicide and an oxygen-based fungicide.

Chlorine-based disinfectants include inorganic chlorine compounds such as hypochlorous acid (lactose), chlorine dioxide, and organic chlorine compound sodium dichloride isocyanate (SDIC), and oxygen-based disinfectants include hydrogen peroxide and ozone water.

The sterilizing agent may also include ozone water, electrolytic sterilization water, radical water, and the like.

This sterilizing agent is dissolved in the water in the collection section 220 after being discharged from the sterilizing agent storage section 620.

15 is a control configuration of the dishwasher 3 according to yet another embodiment. The dishwasher 3 includes a user interface 180, a driving module 190, a cleaning assembly 200, and a sterilizer 600 do.

The user interface 180 includes an input unit 181 for inputting operation information from a user and a display unit 182 for displaying operation information and the like in progress.

Also, the input unit 181 of the user interface 180 receives the execution cycle of the sterilization mode and the sterilization mode, and the display unit 182 displays information about the sterilization mode execution.

Here, the sterilization mode includes a pre-sterilization process for preliminarily sterilizing the washing tub using water at room temperature, a main sterilization process for sterilizing the washing tub in earnest using sterilized water with a sterilizing agent diluted, and a sterilizing agent remaining in the washing tub and the washing assembly And a rinsing step for removing the rinsing water.

Information on the execution of the sterilization mode includes information on the elapsed time and remaining time of the sterilization mode, remaining administration information, schedule information of the next sterilization mode, and the remaining administration information includes rinsing Includes the time or frequency of administration.

The user interface 180 may also indicate the presence or absence of the germicide in the fungicide storage unit 620 during the sterilization mode.

The cleaning assembly 200 drives the water supply unit 210, the circulation unit 250 and the drainage unit 270 in accordance with a control command of the control unit 191c in the cleaning mode to collect water for washing, circulation, .

The cleaning assembly 200 circulates sterile water and rinse water in the sterilization mode. At this time, the inside of the washing tub and washing assembly 200 is cleaned and sterilized by the sterilizing water circulating the washing assembly 200, and sterilized inside the washing tub and the washing assembly 200 by rinsing water circulating the washing assembly 200 The number is removed.

The sterilizing unit 600 drives the detecting unit 610 and the opening and closing member 623 of the sterilizing agent storage unit 620 according to a control command of the controller 191c during the sterilization mode of sterilization mode to generate water for sterilization .

The detection unit 610 detects environmental information inside the washing tub for performing the sterilization mode.

The tableware detection unit 611 detects the presence or absence of the tableware stored in the storage unit in the cleaning tank and transmits the detected information to the control unit 191c. The dish detector 611 includes any one of a weight sensor, an acoustic wave sensor, an electromagnetic wave sensor, and an optical sensor.

The water level detection unit 612 detects the amount of water in the washing tub 130 or the water collecting unit 220 and transmits the detected information to the control unit 191c.

The bactericide detection unit 613 detects the amount of the sterilizing agent remaining in the water inside the washing tub and transmits the detected information to the control unit 191c.

Here, the water level detector 612 may use a water level detector provided for washing dishes, or a water level detector separately provided for sterilizing the inside of the washing tank.

The driving module 190 controls and drives various loads to perform the cleaning mode and the sterilization mode, and includes a control unit 191c, a driving unit 192c, and a storage unit 193c.

The control unit 191c receives the operation information for dishwashing and the operation information for sterilizing the inside of the washing tub through the user interface 180 and controls the display of the inputted operation information and the operation information in progress.

The control unit 191c controls the opening of the cleaning agent storage unit 140 so that the cleaning agent is discharged when the operation information inputted to the user interface 180 is the cleaning mode, .

If the operation information input to the user interface 180 is the sterilization mode or the current time is determined to be the sterilization mode execution time, the control unit 191c determines whether or not the tableware stored in the cleaning tank 130 is present, The water supply valve 212 of the water supply unit 210 and the opening and closing member 623 of the fungicide storage unit 620 are driven based on the information detected by the water level detection unit 612 to generate sterilization water for sterilization .

The control unit 191c controls the circulation pump 251 of the circulation unit 250 to turn on the plurality of the valves 256, 257, and 258 so that the generated sterilization water is injected when the sterilizing water is generated through the injection of the sterilizing agent during the sterilization, And when the sterilization mode is completed, the drain pump 271 of the drainage unit 270 is turned on so that the sterile water is discharged to the outside.

The control unit 191c controls at least one rinsing cycle in order to discharge the sterilizing agent in the cleaning tank in the sterilization mode.

At this time, the control unit 191 repeatedly controls the rinsing cycle until the amount becomes equal to or less than the reference germicide amount.

In addition, the control unit 191c may repeatedly control the driving of the water supply unit 210 and the circulation unit 250 by the predetermined number of rinsing cycles for the rinsing cycle control.

The driving unit 192c controls the water supply valve 211 of the water supply unit, the circulation pump 251 of the circulation unit, the first valve 256, the second valve 256, and the second valve 256 so that the washing water for dishwashing is circulated in accordance with the control signal of the controller 191c, The valve 257 and the third valve 258 are driven to drive the drain pump 271 of the drainage unit so that the water used for dishwashing is discharged to the outside.

The driving unit 192c drives the water feed unit 210 and the bactericide storage unit 620 so as to generate sterilized water according to the control signal of the control unit 191b during the sterilization mode of sterilization mode.

The driving unit 192c is connected to the water supply valve 211 of the water supply unit, the circulation pump 251 of the circulation unit, the first valve 256, the second valve 257 and the third valve 258 to circulate sterilizing water and rinsing water in the sterilization mode And drives the drain pump 271 of the drainage unit so that sterilized water and rinsing water are discharged to the outside.

The storage unit 193c stores a predetermined standard sterilization cycle and a first reference water level and a first reference time suitable for the pre-sterilization stroke for sterilizing the washing tub and the washing assembly, and stores a second reference water level suitable for the present sterilization stroke, And stores a third reference level and a third reference time appropriate for the rinse cycle for rinsing the sanitized wash tank and the wash assembly.

It is also possible that the storage section 193c stores the reference germicide amount for stopping and controlling the rinsing cycle and stores the reference turbidity of water for stopping the pre-sterilization.

16A and 16B are flowcharts of control of the dishwasher according to still another embodiment.

The dishwasher 3 determines 631 whether to proceed the sterilization mode.

The determination of whether or not the sterilization mode is performed may be performed by determining whether the sterilization mode has been input to the user interface 180 or determining whether the current time is a predetermined sterilization cycle point or determining whether the smell detected by the odor detection unit And judging the time when the amount is equal to or greater than the reference amount to be the sterilization mode progress time point.

Here, the odor detecting portion includes a gas sensor for detecting the amount of gas in the washing tub.

Next, the dishwasher 3 detects (632) a tableware in the washing chamber using the tableware detector 611, determines 633 whether there is a tableware stored in the washing chamber based on the detected information, If it is determined that there is a stored tableware, the user is informed (634) to take out the tableware and informs the user to re-order the sterilization mode after the table is taken out.

The reason why the dishwasher is housed or not is to perform the sterilization mode in a state in which there is no dishware which is a resistance element to the sterilization performance in the washing tub. This can improve the sterilizing performance.

It is also intended to prevent the disinfectant which is harmful to the human body from remaining in the tableware. This can improve safety.

On the other hand, if the dishwasher 3 judges that there is no tableware stored in the washing chamber, the sterilizing mode is entered (635) and the pre-sterilization is executed (636) to sterilize the washing tub and the washing assembly. Here, the pre-sterilization step is performed for a predetermined number of times or a predetermined time.

In addition, the pre-sterilization step can be selectively performed.

This pre-sterilization step 636 is the same as the pre-sterilization stroke in the other embodiments and is briefly described.

The dishwasher 3 opens the water supply valve 212 of the water supply unit and supplies water for pre-sterilization from the outside to the water collection unit 220 and the cleaning tank 130. The water level of the water supplied into the cleaning tank during the water supply is detected And compares the detected water level with the first reference water level to determine whether the detected water level is the first reference water level.

Next, in the dishwasher (3), when it is determined that the detected water level in the washing tank is the first reference water level, the water supply valve is closed to stop the water supply.

Next, the dishwasher 3 turns on the circulation pump 251 and drives the first valve 256, the second valve 257 and the third valve 258 to turn on the washing tub 130 and the collecting unit 220, The first spray nozzle 261, the second spray nozzle 262, the second spray nozzle 264, the second spray nozzle 262, the second spray nozzle 262, and the second spray nozzle 264 through the main pipe 252, the first branch pipe 253, the second branch pipe 254, The second injection nozzle 262, and the third injection nozzle 263 so as to be sprayed into the cleaning chamber.

Next, the dishwasher 3 compares the pre-sterilization time at which the pre-sterilization process is performed and the predetermined first reference time. At this time, if it is determined that the first sterilization time has passed the first reference time, the circulation pump 251 is driven off The circulation and injection of sterilized water are stopped by turning off the first valve 256, the second valve 257 and the third valve 258 so that the drain pump 271 is turned on, To be discharged to the outside.

When the dishwasher 3 determines that all the sterilized water in the washing tank has been discharged (549), the drain pump 271 is turned off to stop the drainage (550), and the pre-sterilization process is terminated.

Next, the present sterilization step is carried out. This will be explained in more detail.

When the dishwasher 3 enters the sterilization mode, the water supply valve 212 of the water supply unit is opened to supply water for sterilization 637 from the outside, and the water is stored in the water collection unit 220 and the washing tank 130.

Next, the dishwasher 2 detects (638) the water level of the water supplied into the washing tub, compares the detected water level with the reference water level, and determines whether the detected water level is the second reference water level (639).

Next, in the dishwasher 2, when it is determined that the detected water level in the washing tub is the second reference water level, the water supply valve is turned on to close the water supply valve, thereby stopping the water supply, and the opening / closing member 623 of the fungicide storage unit 620 The disinfectant contained in the body 621 of the fungicide storage part 620 is discharged into the washing tub 140 by opening the opening and closing member 623.

At this time, the sterilizing agent discharged from the fungicide storage part is diluted with water in the water collecting part 220.

Next, the dishwasher 3 closes the opening and closing member 623 of the fungicide storage part 620 when the disinfectant discharge is completed.

Next, the dishwasher 3 turns on the circulation pump 251 and drives the first valve 256, the second valve 257, and the third valve 258 to be turned on to open (641).

The sterilizing water in the washing tub 130 and the water collecting unit 220 is supplied to the first injection nozzle (not shown) through the main pipe 252, the first branch pipe 253, the second branch pipe 254 and the third branch pipe 255, The second injection nozzle 262 and the third injection nozzle 263 and then through the first injection nozzle 261, the second injection nozzle 262 and the third injection nozzle 263 To be sprayed into the cleaning chamber.

That is, the dishwasher 3 is provided with sterilizing water in the washing tub 130 and the water collecting unit 220 so that sterilizing water is circulated through the circulating pump 251, the main pipe 252, the first branch pipe 253, the second branch pipe 254, The sterilizing water injected into the washing tub is returned to the washing tub 130 through the third branch nozzle 255, the first injection nozzle 261, the second injection nozzle 262 and the third injection nozzle 263, And washing and sterilizing the inside of the washing tub 130 and the washing assembly 200 while circulating the sterilizing water to be collected in the collecting unit 220.

A chlorine-based or an oxygen-based sterilizing agent is injected, and the inside of the dish is sterilized through the circulation pump.

Next, the dishwasher 3 compares the actual sterilization time at which the sterilization process is performed and a predetermined second reference time at step 642. At this time, if it is determined that the sterilization time has exceeded the second reference time, the circulation pump 251 is turned off The first valve 256, the second valve 257 and the third valve 258 are driven to be turned off to close the circulation path so that circulation and injection of sterilized water are stopped (643).

Where the second reference time is approximately 15 minutes or more.

Next, the dishwasher 3 turns on the drain pump 271 to discharge the sterilized water in the washing tub 130 to the outside (644).

Next, when the dishwasher 3 determines that all the sterilized water in the cleaning tank has been discharged (645), the drain pump 271 is turned off to stop the drainage (646), followed by terminating the present sterilization stroke.

Here, the present sterilization stroke can be performed at least once.

The completion of the drainage is determined based on the water level detected by the water level detection unit or based on a preset discharge time.

Next, the dishwasher 3 performs a rinsing stroke. This will be explained in more detail.

The dishwasher 3 opens the water supply valve 212 of the water supply unit and supplies water for rinsing from the outside to the water collecting unit 220 and the washing tub 130. [

Next, the dishwasher 3 detects (648) the water level of the water supplied into the washing tub, compares the detected water level with the third reference water level, and determines whether the detected water level is the third reference water level (649).

Next, in the dishwasher 3, if it is determined that the detected water level in the washing tank is the third reference water level, the water supply valve is closed to stop water supply (649).

Next, the dishwasher 3 turns on the circulation pump 251 to turn on the first valve 256, the second valve 257 and the third valve 258 to open the circulation line, And the rinsing water in the collecting section 220 are supplied to the first injection nozzle 261 through the main pipe 252, the first branch pipe 253, the second branch pipe 254 and the third branch pipe 255, The second injection nozzle 262 and the third injection nozzle 263 so as to be sprayed into the cleaning chamber through the first injection nozzle 261, the second injection nozzle 262 and the third injection nozzle 263 650). Here, the rinse water is water at room temperature.

The rinsing water is sprayed from the cleaning assembly to the cleaning chamber inside the cleaning tank and the washing water is supplied to the cleaning tank 130 and the cleaning assembly 130 through the circulation process of the rinsing water so that the rinsed water is collected again in the cleaning tank 130 and the water collecting unit 220 200). ≪ / RTI >

Next, the dishwasher 3 compares the rinsing time of the rinsing cycle with a predetermined third reference time, and when the rinsing time is judged to have passed the third reference time 651, the circulation pump 251 is turned off The first valve 256, the second valve 257 and the third valve 258 are closed to cause the circulation and injection of the rinse water to stop (652).

Next, the dishwasher 3 detects (653) the amount of the sterilizing agent remaining in the rinsing water, compares the detected amount with the reference amount (654), and if the detected amount is equal to or greater than the reference amount, The drain pump 271 is turned on to discharge the rinse water in the washing tub 130 to the outside (655).

The reason for detecting the sterilizing agent remaining in the washing tub when performing the sterilization mode is to prevent the sterilizing agent harmful to the human body from reaching the utensil when the washing mode is performed later.

Next, when the dishwasher 3 judges that all the rinsing water in the washing tub is discharged (656), the drain pump 271 is driven to be off to stop the drainage (657), and the rinsing cycle is terminated.

Here, the rinsing cycle may be a predetermined number of times of rinsing, or a rinsing cycle of a predetermined time may be performed.

Next, the dishwasher 3 can also inform the user of the end of the sterilization mode. It is also possible that the dishwasher 2 informs the user of the next sterilization mode schedule.

By using the sterilizing agent to clean and sterilize the washing tub and the washing assembly, it is possible to prevent the propagation of microorganisms, thereby preventing the generation of odor. This will be described with reference to FIGS. 17 and 18. FIG.

FIG. 17 is a graph of the amount of bacteria and gas in the collection section before and after the sterilization mode of the dishwasher, and FIG. 18 is a graph of the amount of mycelium with time elapsed before and after the sterilization mode.

As shown in FIG. 17, after the washing mode of the dishwasher is completed, about 4 log of bacteria are present in the water collected in the collecting part, but after 48 hours, it is increased to 8 log or more and the amount of the bacteria in the collecting part is saturated Able to know.

In the dishwasher, proteins and vitamins are decomposed to generate gases such as amines, anilines, organic acids, and thiols.

Therefore, in order to compare the increase of the amount of bacteria and the odor generation, the gas amount of the thiols known as a representative component of the malodor was analyzed by day, and it was found that the gas production amount of the thiols was also increased as the amount of the cells increased.

On the other hand, after completion of the sterilization mode of the dishwasher, it can be seen that there is a quantity of gas and gas close to zero in the residual water in the collecting section.

Also, as shown in FIG. 18, the dishwasher shows a decrease in the amount of the cells after completion of the sterilization mode, and the amount of the cells continues to 0 log for 24 hours after the sterilization mode.

In the dishwasher according to another embodiment, the detergent storage unit and the fungicide storage unit are provided, respectively, but it is also possible to insert the fungicide in the sterilization mode using only the detergent storage unit without the fungicide storage unit.

In this case, when the sterilizing mode is reached, the dishwasher informs the user of the disinfectant input through the user interface, and when the disinfectant input operation and sterilization mode execution command are input from the user, the disinfectant contained in the detergent storage unit is discharged to the washing tub, Circulation, spraying, drainage, etc., to sterilize the wash tub and wash assembly.

110: main body 120: door
130: Cleaning tank 140: Cleaning agent storage unit
150: machine room 160:
170: guide portion 180: user interface
190: drive module 200: cleaning assembly

Claims (56)

A collecting part for collecting washing water in the washing chamber;
A reservoir in which a part of the wash water is stored;
An electrolytic unit provided in the reservoir;
A flow path switching valve that opens and closes a flow path between the collecting part and the storage tank;
A circulation pump circulating water stored in the water collecting part and the storage tank into the washing chamber;
The control unit controls the operation of the electrolytic unit so as to enter the sterilization mode when the dishwasher is not operated and to electrolyze the washing water in the storage tank to generate sterilized water and to circulate the generated sterilization water into the dishwasher, And a control unit for controlling operation of the circulation pump,
Wherein the control unit stops the entry of the sterilization mode if it is determined that there is a tableware in the cleaning room. The method according to claim 1,
And a water level detector arranged to detect the water level of the storage tank on one side of the storage tank. 3. The method of claim 2,
Wherein the controller detects the water level of the storage tank through the water level detector and turns on the electrolysis unit if the detected water level is equal to or greater than a predetermined value. The method according to claim 1,
The control unit turns on the electrolytic unit to electrolyze the washing water stored in the storage tank to generate sterilized water when the dishwasher is operated and supplies the sterilized water to the collecting unit for circulating sterilization, And opening the dishwasher. 5. The method of claim 4,
And a water level detector arranged to detect the water level of the storage tank on one side of the storage tank,
Wherein the controller detects the water level of the storage tank and turns on the electrolysis unit if the detected water level is equal to or greater than a predetermined value. 5. The method of claim 4,
Wherein the controller includes opening the flow path switching valve after a predetermined time elapses after turning on the electrolysis unit in the preliminary cleaning of the dishwasher. 5. The method of claim 4,
Wherein the control unit controls the operation of the circulation pump and the flow path switching valve so that the last rinsing water is stored in the reservoir when the last rinsing is completed in operation of the dishwasher. 8. The method of claim 7,
Wherein the control unit opens the flow path switching valve and detects the water level of the storage tank when the last rinsing is completed and closes the flow path switching valve when the detected water level is equal to or higher than a predetermined value. An electrolytic unit provided in the reservoir; a flow path switching valve for opening and closing a flow path between the water collecting unit and the storage tank; A control method of a dishwasher including a circulation pump circulating water into the dishwasher,
When the dishwasher is not operated, enters a sterilization mode;
Electrolyzing the wash water stored in the reservoir through the electrolysis unit to generate sterilized water;
Sterilizing the inside of the dishwasher by circulating the generated sterilization water into the dishwasher;
And stopping the entry of the sterilization mode when it is determined that there is a tableware in the washing room. 10. The method of claim 9,
Wherein the disinfecting water is generated by detecting a water level of the storage tank through a water level detector provided to one side of the storage tank to detect the water level of the storage tank and turning on the electrolytic water when the detected water level is a predetermined value or more, Control method of washing machine. 10. The method of claim 9,
In the operation of the dishwasher, the washing water stored in the storage tank is electrolyzed through the electrolytic unit to generate sterilized water, and the flow path switching valve is opened to supply the generated sterilized water to the collecting part for circulating sterilization And a control unit for controlling the dishwasher. 12. The method of claim 11,
Wherein the sterilizing water generation includes detecting a water level of the storage tank through a water level detection unit provided to one side of the storage tank and detecting the water level of the storage tank and turning on the electrolysis unit when the detected water level is a predetermined value or more Control method of dishwasher. 12. The method of claim 11,
And opening the flow path switching valve after a lapse of a predetermined time after turning on the electrolysis part in the preliminary cleaning of the dishwasher. 12. The method of claim 11,
And storing the last rinse water in the storage tank when the last rinse is completed in operation of the dishwasher. 15. The method of claim 14,
Wherein the last rinse water storage is performed by opening the flow path switching valve when the last rinsing is completed and detecting the water level of the storage tank and closing the flow path switching valve when the detected water level is equal to or higher than a predetermined value, Control method of washing machine. Washing tub;
A washing assembly in which water for washing the tableware stored in the washing tub flows;
A sterilizing unit for generating sterile water;
And a control unit for controlling driving of the sterilizing unit to generate sterilizing water in a sterilizing mode and controlling driving of the cleaning assembly so that the sterilizing water is circulated into the washing tub and the washing assembly,
Wherein the control unit stops the entry of the sterilization mode when it is determined that the dishwasher is present in the dishwasher. 17. The method of claim 16,
Further comprising a dish detector for detecting the presence or absence of the dishware stored in the washing tank. 18. The method of claim 17,
Wherein the tableware detection unit includes a weight sensor for detecting the weight of the storage unit in which the tableware is stored,
Wherein the controller determines that the dish is present if the detected weight is equal to or greater than a reference weight. 18. The method of claim 17,
Wherein the tableware detecting unit includes an optical sensor for outputting light and detecting an amount of output light,
Wherein the controller determines that the tableware is present if the detected light quantity is less than the reference light quantity. 17. The sterilizer according to claim 16,
And a heating unit for heating water in the washing tub. 21. The sterilizer according to claim 20,
Further comprising a temperature detector for detecting the temperature of water in the washing tub,
Wherein the control unit stops the driving of the heating unit based on the temperature of the water. 23. The method of claim 21,
Dishwasher wherein the water is between 50 ° C and 90 ° C. 22. The method of claim 21,
The sterilization mode includes a presterilization step, a main sterilization step and a rinsing step,
Wherein the control unit controls water supply, circulation, injection, and drainage during the pre-sterilization and rinsing steps, and controls water supply, heating, circulation, spraying, and drainage during the main sterilization stroke. 24. The method according to claim 23,
A dishwasher carried out for more than 15 minutes. 24. The method of claim 23,
Further comprising a water level detector for detecting an amount of water in the washing tank,
Wherein the control unit stops the water supply based on the water level of the washing tank. 17. The method of claim 16,
Further comprising a storage unit for storing a cycle of the sterilization mode,
Wherein the control unit determines whether the current time is the execution time of the sterilization mode based on the execution cycle of the sterilization mode and controls the execution of the sterilization mode when the current time is the execution time of the sterilization mode. 27. The method of claim 26, wherein the cycle of the sterilization mode comprises:
30-day interval dishwasher. 27. The method of claim 26,
Further comprising a user interface for providing a user with a cycle of the sterilization mode. 17. The method of claim 16,
Further comprising a user interface for receiving the execution of the sterilization mode,
Wherein the control unit controls execution of the sterilization mode when it is determined that the sterilization mode is input. 17. The sterilizer according to claim 16,
And a sterilizing agent storage unit for storing the sterilizing agent and discharging the sterilizing agent to the cleaning tank in the sterilizing mode. 31. The fungicide storage unit according to claim 30,
An opening / closing member that is opened to enable the sterilizing agent discharge,
And a guide tube for guiding the sterilizing agent to the washing tub. 31. The method of claim 30,
Wherein the control unit controls opening and closing members provided in the fungicide storage unit in the sterilization mode. 30. The method of claim 29,
The sterilization mode includes a presterilization step, a main sterilization step and a rinsing step,
The control unit controls circulation, spraying, and drainage of water, water, and water during the pre-sterilization and rinsing stages, and controls the circulation, spraying, and drainage of water supply, sterilizing agent, and sterilization water during the main sterilization stroke. 34. The method of claim 33,
Further comprising a sterilizing agent detection unit for detecting an amount of the sterilizing agent remaining in the rinsing water,
Wherein the control unit repeatedly controls the rinsing cycle when the detected amount of the germicide is equal to or greater than a reference amount and stops the raning stroke when the amount of the germicide detected is less than the reference amount. 35. The method of claim 34, wherein the bactericide detector comprises:
A turbidity sensor for detecting the turbidity of the rinsing water, an electric conductivity sensor for detecting the electric conductivity of the rinsing water, or a pH sensor for detecting the pH of the rinsing water. 34. The method of claim 33,
Further comprising a water level detector for detecting an amount of water in the washing tank,
Wherein the control unit stops the water supply based on the water level of the washing tank. 17. The cleaning assembly of claim 16,
A water supply unit for supplying water from outside,
A water collecting part for storing the supplied water,
A circulation unit for pumping and circulating the water in the collection unit,
A spraying unit for spraying the circulated water with the washing tub;
And a drain portion for discharging the water to the outside. 17. The method of claim 16,
A contamination degree detecting unit for detecting a contamination degree in the washing tank;
Further comprising a user interface that provides the user with information about the need for a cleaning mode,
Wherein the control unit controls information provision of the user interface if the detected degree of contamination is equal to or greater than a reference degree of contamination. A control method of a dishwasher including a cleaning tank and a cleaning assembly for circulating water in the cleaning tank for cleaning the tableware,
When the sterilizing mode for washing and sterilizing the cleaning tank and the cleaning assembly is received, the presence or absence of the tableware housed in the cleaning tank is detected,
If it is determined that there is no tableware in the washing tank, water is supplied to the water supply unit by controlling the water supply unit,
Heating the supplied water to generate sterilized water,
Controlling the wash assembly to circulate and spray the generated sterile water into the wash tub and wash assembly,
And controlling the drainage unit to discharge the sterilized water to the outside when the circulation and the spraying are completed. 40. The method of claim 39,
Further comprising stopping the entry of the sterilization mode if it is determined that there is a tableware in the cleaning tank. 40. The method of claim 39,
The water supply unit is controlled to supply water,
Detecting the level of the supplied water,
And stops the water supply unit if the detected water level is the first reference water level,
Further comprising circulating and spraying the supplied water to perform a pre-sterilization stroke for a first reference time. 42. The method of claim 41, wherein heating, circulating,
A method of controlling a dishwasher, which is the main sterilization stroke, performed after completion of the pre-sterilization step. 43. The method of claim 42,
And the second reference level water for a second reference time. 43. The method of claim 42,
When the main sterilization process is completed, the water supply unit is controlled to supply water,
Detecting the level of the supplied water,
And stops the water supply unit if the detected water level is the third reference water level,
Further comprising circulating and spraying the supplied water to perform a rinsing stroke for a third reference time. 40. The method of claim 39, wherein determining whether the sterilization mode has been received comprises:
It is judged whether or not the current time is the execution time of the sterilization mode,
And outputting an execution command of the sterilization mode if the current time is the execution time of the sterilization mode. 40. The method of claim 39, wherein determining whether the sterilization mode has been received comprises:
The degree of contamination of the cleaning tank is detected,
And outputting an execution command of the sterilization mode based on the detected degree of contamination. 47. The method of claim 46,
Further comprising discharging the sterilizing agent to the cleaning tank based on the degree of contamination. 40. The method of claim 39, wherein determining whether the sterilization mode has been received comprises:
Further comprising determining whether a command to execute the sterilization mode is input through the user interface. A control method of a dishwasher including a cleaning tank and a cleaning assembly for circulating water in the cleaning tank for cleaning the tableware,
When the sterilizing mode for washing and sterilizing the cleaning tank and the cleaning assembly is received, the presence or absence of the tableware housed in the cleaning tank is detected,
If it is determined that there is no tableware in the washing tank, water is supplied to the water supply unit by controlling the water supply unit,
A sterilizing agent is discharged into the supplied water to generate a sterilizing water,
Controlling the wash assembly to circulate the generated sterile water into the wash tub and wash assembly,
And controlling the drainage unit to discharge the sterilized water to the outside when the circulation and the spraying are completed. 50. The method of claim 49,
Further comprising stopping the entry of the sterilization mode if it is determined that there is a tableware in the cleaning tank. 50. The method of claim 49,
The water supply unit is controlled to supply water,
Detecting the level of the supplied water,
And stops the water supply unit if the detected water level is the first reference water level,
Further comprising circulating and spraying the supplied water to perform a pre-sterilization stroke for a first reference time. 52. The method of claim 51, wherein circulating and injecting the sterile water comprises:
A method of controlling a dishwasher, which is the main sterilization stroke, performed after completion of the pre-sterilization step. 53. The method of claim 52,
And the second reference level water for a second reference time. 53. The method of claim 52,
When the main sterilization cycle is completed, the water supply unit is controlled to supply rinse water,
Detecting the level of the supplied rinse water,
And stops the water supply unit if the detected water level is the third reference water level,
Further comprising circulating and spraying the supplied rinsing water to perform a rinsing stroke for a third reference time. 55. The method of claim 54,
Detecting the amount of the sterilizing agent remaining in the rinsing water when the rinsing cycle is completed,
If the detected amount of the germicide is less than the reference amount, the rinsing cycle is re-
And stopping the rinsing cycle if the detected amount of the germicide is equal to or greater than a reference amount. 50. The method of claim 49,
Further comprising providing the user with tableware retrieval request information if it is determined that there is a tableware in the washing tub.

Images