KR20080088122A - A dish washing machine and control method thereof - Google Patents

Abstract

A dishwasher and a control method thereof are provided to reduce water usage and obtain high cleaning efficiency by changing an area ratio of upper, middle, and lower spraying nozzles and maximizing the spraying amount of the middle spraying nozzle. A dishwasher comprises a body(10), and a door(12). The body has a washing tub(20). The washing tub includes upper and lower dish baskets(22a,22b), racks(24a,24b) sliding the upper and lower dish baskets, and upper, middle, and lower spraying nozzles(26c) which are arranged at upper and lower sides of the upper and lower dish baskets. The upper and middle spraying nozzles are connected with a sump(42) by a first supply pipe(28a). The lower spraying nozzle is connected with the sump by a second supply pipe(28b). The water supplied to the upper and middle spraying nozzles, and the water supplied to the lower spraying nozzle are sprayed independently by operation of the upper, middle, and lower spraying nozzles. An area ratio of spraying holes of the upper, middle, and lower spraying nozzles is 0.5:1.5:1 so that the spraying amount of the middle spraying nozzle is greatest.

Description

A dish washing machine and control method

1 is a side cross-sectional view showing the configuration of a dish washer according to the present invention,

2 is a control block diagram of a dish washer according to one embodiment of the present invention;

3A to 3C are flowcharts illustrating a control operation procedure of the dish washing machine according to the present invention.

* Description of symbols on the main parts of the drawings *

20: washing tank 22a, 22b: dish basket

26a, 26b, 26c: injection nozzles 28a, 28b: first and second supply pipes

30: heater 42: sump

44: temperature sensor 46: circulation pump

58: water level detection unit 60: input unit

62: control unit 66: water supply valve

The present invention relates to a dishwasher and a control method thereof, and more particularly, to a dishwasher and a control method thereof capable of securing washing performance while reducing the amount of water used.

In general, the dishwasher is a device for washing contaminants (food waste, etc.) in the dish by spraying the washing water of cold or hot water at a high pressure, such a dishwasher has a Korean Patent Publication No. 2005-0105721.

The dishwasher disclosed in the publication includes a washing tank for washing dishes, a plurality of dish baskets provided in multiple stages inside the washing tank for storing dishes, spray nozzles provided at upper and lower portions of the plurality of dish baskets, and spraying washing water. It is connected to the sump to pump the washing water into the spray nozzle.

When the dishwasher has the structure to store the dish to be washed in the dish basket and the washing water is supplied to the washing tank, the circulating pump inside the sump operates and moves the washing water to the spray nozzle to spray the washing water to the dish at high pressure. Wash dishes. This washing process (washing and rinsing stroke) is usually divided into the main stroke (main or final rinsing) and preliminary stroke (preliminary washing or pre-rinsing) and repeated four to six times depending on the course. Depends on the course.

However, such a dishwasher supplies the amount of washing water required for the operation of the circulating pump (nozzle injection) for each stroke. In total, since the stroke is four times, 20 L of washing water is required. The standard for calculating energy in dishwashers is the sum of electrical energy consumed by electric equipment such as circulation pumps and heaters during the course of operation, and thermal energy of temperature conversion efficiency based on the amount of water used for washing water. Therefore, it is important to reduce water consumption for energy saving.

In order to reduce water consumption for the purpose of energy saving, conventionally, a method of reducing the required water supply by reducing the number of small circulation pumps and nozzle nozzles has been proposed. In order to obtain the cleaning performance, the cleaning time becomes long.

Accordingly, the present invention is to solve the conventional problems as described above, an object of the present invention is to provide a dish washing machine and a control method that can ensure the washing performance while reducing the amount of water used while maintaining the washing time.

Another object of the present invention is to provide a dish washer and a method of controlling the same, by changing the area ratio of the nozzle injection ports arranged in the upper, middle and lower directions so that the injection amount of the stop nozzle is maximized.

Still another object of the present invention is to provide a dish washing machine and a control method thereof, which can reduce the amount of water required in the entire stroke by reducing the amount of water used in the preliminary stroke before entering the present stroke.

In order to achieve the above object, the present invention includes a washing tank, a dish box provided in the washing tank for storing dishes, and a plurality of nozzles for spraying the washing water into the dish box, wherein the plurality of nozzles have a spraying hole for washing the washing water. Each of the injection holes formed in the plurality of nozzles are formed in different areas.

In addition, the plurality of nozzles are composed of upper, middle and lower nozzles respectively installed on the upper and lower and middle portions of the dish basket, and the middle and middle stop nozzles are used to increase the spraying area of the middle nozzle in order to increase the amount of spray compared to the lower nozzle. It is characterized in that the larger than the injection port area of the lower nozzle.

In addition, the interruption nozzle is characterized in that a plurality of injection holes for injecting the upper nozzle and a plurality of injection holes for injecting the lower nozzle is formed.

In addition, the present invention further includes a control unit for controlling the flow path of the washing water supplied to the upper, middle and lower nozzles, wherein the control unit at least one stroke of the plurality of strokes for washing the dishes using the washing water is a water supply amount; It is characterized by setting less than the water supply amount of another stroke.

In addition, the one stroke is characterized in that the pre-wash or pre-rinse.

The present invention may further include a circulation pump circulating the washing water in the washing tank to guide the upper, middle and lower nozzles, and the control unit may control the upper and middle nozzles according to the operation of the circulation pump during preliminary washing or pre-rinsing. It characterized in that the control to spray the washing water through.

The present invention also provides a washing tank, a dish box provided in the washing tank for storing dishes, a plurality of nozzles for spraying the washing water into the dish box, and a control method of the dish washing machine having a heater for heating the washing water. At least one of the plurality of strokes for washing the dishes using the water is characterized in that the water supply amount is set less than the water supply amount of the other stroke.

The one stroke may be a stroke in which the heater operation is not performed.

In addition, the stroke in which the heater operation is not performed is characterized in that the pre-wash or pre-rinse.

In addition, the present invention is characterized by controlling the water supply operation to supply the washing water to the washing tank when the detected washing water level is less than a predetermined low water level in the heater operation section by detecting the washing water level of the washing tank.

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

1 is a side cross-sectional view showing the configuration of a dish washer according to the present invention.

In Figure 1, the dishwasher of the present invention is formed of a main body 10 having a washing space therein, and a door 12 for opening and closing the front of the main body 10 to form its appearance.

The main body 10 is provided with a washing tank 20 for washing, and the washing tank 20 includes upper and lower dish baskets 22a and 22b for storing dishes, and upper and lower dish baskets 22a and 22b. Racks 24a and 24b for supporting slide movement, and upper and lower spray nozzles 26a, suspended spray nozzles 26b, and lower spray nozzles are provided at upper and lower portions of upper and lower dish baskets 22a and 22b to spray water washing water. 26c is provided.

Here, the upper injection nozzle 26a and the interruption injection nozzle 26b are connected to the sump 42 which will be described later by the first supply pipe 28a, and the lower injection nozzle 26c is sump by the second supply pipe 28b. In connection with (42), the washing water is supplied.

At this time, the washing water supplied to the upper injection nozzle 26a and the interruption injection nozzle 26b through the first supply pipe 28a, and the washing water supplied to the lower injection nozzle 26c through the second supply pipe 28b are upper According to the operation of the injection nozzle (26a) and the interruption injection nozzle (26b) or the operation of the lower injection nozzle (26c) has a structure that is independently sprayed for this purpose, to provide a separate flow path switching device or the first and second supply pipe Valves may be provided at 28a and 28b.

On the other hand, the area ratio of the injection hole for spraying the washing water from the upper injection nozzle 26a, the interruption injection nozzle 26b, and the lower injection nozzle 26c is 0.5: 1.5: 1, respectively, so that the injection amount of the interruption injection nozzle 26b is maximum. Design to be This is because the amount of spraying of the interruption injection nozzles 26b is greater than the amount of ejection of the lower injection nozzles 26c, and thus, in the case of the dishes stored in the lower dish basket 22b, the spraying of the interruption injection nozzles 26b is sufficiently preliminarily washed with the lower injection and the falling water of the interruption injection nozzles 26b. And preliminary rinsing.

In addition, the interruption injection nozzles 26b are provided with a plurality of injection holes sprayed to the upper part of the interruption injection nozzles 26b and lower injection nozzles 26b, so that the washing water is formed on the upper part of the interruption injection nozzles 26b. At the same time to be sprayed to the and bottom.

And, the bottom surface of the washing tank 20 is provided with a heater 30 for heating the washing water, the heater 30 is accommodated in the heater installation groove 32 formed on the bottom surface of the washing tank (20).

In addition, the lower portion of the washing tank 20 is provided with a machine room 40, the inside of the machine room 40 to collect and pump the washing water supplied into the washing tank 20 to the washing water to the upper, middle and lower injection nozzles (26a, The sump 42 which moves to 26b, 26c is provided, and the temperature sensor 44 which detects the wash water temperature is provided in the inside of this sump 42.

In addition, the sump 42 is provided with various flow paths and a circulating pump 46 for pumping water into these flow paths, and a drain pump for discharging contaminated washing water to the outside through the drain pipe 52 on one side of the sump 42. 48 and a drain valve 50 are provided.

2 is a control block diagram of the dish washing machine according to one embodiment of the present invention, in addition to the apparatus shown in FIG. 1, the water level detecting unit 58, the input unit 60, the control unit 62, the driving unit 64, and the display unit ( 68).

The water level detection unit 58 detects the amount (water level) of water (washing water) supplied to the washing tank 20, and the input unit 60 is various washing courses (for example, standard course, Manual course, etc.) and the operation information such as the washing water temperature, rinse addition to the control unit 62.

The washing course is a water supply mode for supplying the washing water, a washing mode for spraying the washing water after the watering to the dishes, a heating mode for heating to a temperature suitable for washing and rinsing before spraying the washing water to the dishes, discharge the washing water after washing It includes a standard course for operating each step of the sequence leading to the drainage mode, the drying mode to dry the washed dishes after washing, and a manual course for the user to arbitrarily select each stroke according to the use situation.

The control unit 62 is a microcomputer that controls the washing, rinsing and drying operations by operating the dishwasher according to the operation information input from the input unit 60, and preliminary stroke (preliminary washing, preliminary washing) is not performed. The water supply amount of the rinse) is set to be smaller than the water supply amount of the present stroke (main washing, last rinsing) in which the heater 30 operation is performed. For example, in the case of the standard course, if the amount of water required by each stroke (once) is the first water level (about 5L), this stroke (main wash, final rinse) supplies all the required water supply (5L) and preliminary stroke. In preliminary washing and pre-rinse, the second water level (approximately 4 liters) is about 20% less than the required water supply (5 liters) to reduce the amount of water used in the entire stroke by about 10 percent.

As such, in order to secure the washing performance which may be reduced as the amount of water used is reduced, the control unit 62 mainly uses the injection operation of the interruption injection nozzle 26b in the case of preliminary stroke (preliminary washing, preliminary rinsing). The dishes stored in the lower dish basket 22b may be cleaned by the lower spray and the falling water of the middle spray nozzle 26b in a circular operation such that the washing water is sprayed only in the middle spray nozzles 26a and 26b.

The driving unit 64 drives the heater 30, the circulation pump 46, the drain pump 48, the drain valve 50, and the water supply valve 66 according to the drive control signal of the controller 62. The water supply valve 66 controls the water supply of the washing water supplied into the washing tank (20).

The display unit 68 displays an operation state and an error of the dishwasher according to the display control signal of the controller 62.

Hereinafter, the operation process and the effect of the dish washer and the control method configured as described above will be described.

3A to 3C are flowcharts illustrating a control operation procedure of the dish washing machine according to the present invention.

When the user selects a washing course (for example, a standard course) and desired driving information while storing the dishes to be washed in the dish baskets 22a and 22b in the washing tub 20, the driving information selected by the user is input. It is input to the control part 62 via the 60.

Therefore, the controller 62 starts the washing stroke and the rinsing stroke according to the driving information input from the input unit 60. First, it is determined whether the washing course selected by the user is a standard course (S100).

In the case of the standard course, the control unit 62 operates the water supply valve 66 through the driving unit 64 to start supplying the washing water required for the preliminary washing into the washing tank 20 (S102).

The water level detection unit 58 detects the amount of the washing water supplied to the washing tank 20 when preliminary washing water is supplied for preliminary washing, and the second water level (water supply amount of about 20% less than the amount of water required for this washing, about 4L) (S104).

If the washing level is not the second level, the washing water is continuously supplied into the washing tank 20 until the second level is reached. If the washing level is the second level, the water supply valve 66 is turned off in the controller 62 to wash the washing water. Stop water supply (S106).

The wash water supplied into the washing tank 20 is collected into the sump 42 provided below the washing tank 20, and the washing water collected by the pumping action of the circulation pump 46 inside the sump 42 is provided in the first supply pipe. (28a) is moved to the upper injection nozzle (26a) and the interruption injection nozzle (26b) by injecting the washing water at high pressure to the dry contaminants contained in the dishes stored in the dish baskets (22a, 22b) by the high pressure of the tableware wet and contaminated Proceed with preliminary washing for (S108).

In case of preliminary cleaning, even if the washing water is sprayed only through the upper spray nozzle 26a and the interrupted spray nozzle 26b without operating the lower spray nozzle 26c, the spray nozzle area ratio of the interrupted spray nozzle 26b is lower than the lower spray nozzle 26c. About 1.5 times larger than), the dishes stored in the lower dish basket 22b can be sufficiently wetted by the lower spray and the falling water of the washing water sprayed through the interruption spray nozzle 26.

When the preliminary washing is performed, the controller 62 determines whether the preliminary washing time (about 15 minutes) has elapsed by counting the preliminary washing time (that is, about 15 minutes), that is, whether the preliminary washing is completed (S110). Continue the preliminary wash until the prewash time has elapsed.

As a result of the determination of S110, when the preliminary washing is completed, the contaminants on the dishes as well as the washing water are washed by the washing water and collected by the sump 42. Thus, the control unit 62 of the drain pump 48 and the drain valve 50 According to the operation to drain the washing water containing contaminants through the drain pipe (52) (S112).

Thereafter, the control unit 62 operates the water supply valve 66 to perform the main cleaning after the preliminary washing, and supplies the washing water necessary for the main washing into the washing tank 20 (S114).

The water level detection unit 58 detects the amount of the washing water supplied to the washing tank 20 when the washing water is supplied for this washing, and determines whether it is a predetermined first water level (water supply amount required for the washing, about 5L) (S116). ).

If the washing level is not the first level, the washing water is continuously supplied into the washing tank 20 until the first level is reached. If the washing level is the first level, the water supply valve 66 is turned off in the controller 62 to wash the washing water. Stop water supply (S118).

The washing water supplied into the washing tank 20 is collected into the sump 42 as in the preliminary washing, and the washing water collected into the sump 42 is heated to a predetermined temperature (about 50 ° C.) by the operation of the heater 30. Heated (S120), at the same time the washing detergent is introduced into the washing tank 20 through a detergent dosing device (not shown).

Accordingly, the washing water of the warm water (about 50 ° C.) into which the washing detergent is introduced is pumped by the circulation pump 46 through the first and second supply pipes 28a and 28b, and the upper injection nozzle 26a and the interruption injection nozzle 26b. ) And the lower injection nozzle 26c to spray the washing water at a high pressure on the entire dishes stored in the dish baskets 22a and 22b to perform the main cleaning to remove contaminants on the dishes (S122).

In the present cleaning, the spraying of the washing water through the upper spray nozzle 26a, the interrupting spray nozzle 26b, and the lower spray nozzle 26c is to remove the contaminants actively by spraying the washing water on all the stains on the dishes. .

In addition, during the washing, if the washing water level is lowered below the predetermined low water level in the heater 30 operating section, the water supply operation is unconditionally performed so that the washing water level does not fall below the low water level.

When the main wash is performed, the controller 62 determines whether the main wash time has elapsed (about 30 minutes) by counting the progress time of the main wash, that is, whether the main wash is completed (S124). Continue the wash until the wash time has elapsed.

As a result of the determination of S124, as in the case of the completion of the main washing, as well as the preliminary washing, contaminants on the tableware are washed and collected by the sump 42, so that the control unit 62 includes the drain pump 48 and the drain valve 50. In accordance with the operation of the contaminant is drained through the drain pipe (52) (S126).

Thereafter, the controller 62 supplies the washing water (specifically, rinsing water) necessary for the preliminary rinsing by operating the water supply valve 66 to proceed with the preliminary rinsing after the main washing (S128).

When the washing water (rinsing water) for preliminary rinsing is supplied, the level of the washing water (rinsing water) supplied to the washing tank 20 is sensed by the water level detecting unit 58, and the second level (the amount of water required for the main rinsing) is detected. 20% less water supply, about 4L) is determined (S130).

If the washing level (rinsing level) is not the second level, the washing water (rinsing water) is continuously supplied into the washing tank 20 until the second level is reached, and if the washing level (rinsing level) is the second level, the controller ( 62, the water supply valve 66 is turned off to stop the washing water (rinsing water) water supply (S132).

The washing water (rinsing water) supplied to the inside of the washing tank 20 is collected into the sump 42 as in the preliminary washing or the main washing, and then the washing water (rinsing water) collected by the pumping action of the circulation pump 46 is Moved to the upper injection nozzle (26a) and the interruption injection nozzle (26b) through the first supply pipe (28a) and is widely sprayed with a high pressure to the dish to perform a preliminary rinsing to wash the contaminants and detergent dropped by the main cleaning (S134) .

When preliminary rinsing is performed without the lower injection nozzle 26c being operated and spraying the washing water (rinsing water) only through the upper injection nozzle 26a and the interruption injection nozzle 26b, the area ratio of the injection hole of the interruption injection nozzle 26b is lower. Since it is about 1.5 times larger than the spray nozzle 26c, the dishes stored in the lower dish basket 22b can be sufficiently rinsed even by the lower spray and the falling water of the washing water (rinsing water) sprayed through the suspended spray nozzle 26. Do.

When the preliminary rinsing is in progress, the controller 62 determines whether the preliminary rinsing time (about 5 minutes) has elapsed by counting the progress time of the preliminary rinsing (that is, whether or not the preliminary rinsing is completed (S136)). Continue the pre-rinse until the pre-rinse time has elapsed.

As a result of the determination in S136, when the preliminary rinsing is completed, contaminants and detergents are washed by the washing water (rinsing water) as well as the washing water (rinsing water), and thus the control unit 62 collects the sump 42. And according to the operation of the drain valve 50 to drain the washing water (rinsing water) containing contaminants through the drain pipe (52) (S138).

Thereafter, the controller 62 supplies the washing water (rinsing water) necessary for the last rinsing into the washing tank 20 by operating the water supply valve 66 to proceed with the final rinsing after preliminary rinsing (S140).

The water level detecting unit 58 detects the amount of the washing water (rinsing water) supplied to the washing tank 20 at the time of supplying the washing water (rinsing water) for the last rinsing, and the first water level (water supply amount required for the rinsing, about 5L) It determines the recognition (S142).

If the washing level (rinse level) is not the first level, the washing water (rinsing water) is continuously supplied into the washing tank 20 until the first level is reached, and if the washing level (rinsing level) is the first level, the washing water ( Rinse water) to stop the water supply (S144).

The washing water (rinsing water) supplied to the inside of the washing tank 20 is collected into the sump 42 similarly to the preliminary rinsing, and the washing water (rinsing water) collected into the sump 42 is preliminarily by the operation of the heater 30. It is heated to a predetermined temperature (about 65 ℃) (S146), at the same time the rinsing agent is introduced into the washing tank 20 through the rinsing agent injector (not shown).

Therefore, the washing water (rinsing water) of warm water (about 65 ° C.) to which the rinsing agent is introduced is interrupted by the upper injection nozzles 26a and the interruption injection through the first and second supply pipes 28a and 28b by the pumping action of the circulation pump 46. The final rinsing is performed to remove the fine particles from the dishes by spraying the washing water to the nozzle 26b and the lower injection nozzle 26c and washing the whole dishes stored in the dish baskets 22a and 22b at high pressure (S148). ).

During the last rinsing, spraying all of the washing water (rinsing water) through the upper spray nozzle 26a, the middle spray nozzle 26b, and the lower spray nozzle 26c sprays the washing water all over the dirt on the tableware, so that even fine contaminants are actively sprayed. To remove it.

In addition, during the last rinsing, when the washing water level (rinsing water level) is lowered below the predetermined low water level in the heater 30 operation section, the water supply operation is unconditionally performed so that the washing water level (rinsing water level) does not fall below the low water level.

When the last rinsing is in progress, the controller 62 counts the progress time of the last rinsing and passes the predetermined last rinsing time (about 30 minutes), that is, determines whether the last rinsing is completed (S150) when the last rinsing is not completed. Continue the last rinse until the last rinse time has elapsed.

As a result of the determination of S150, when the final rinsing is completed, as in the preliminary rinsing, not only the washing water (rinsing water) but also the fine contaminants on the tableware are collected and collected by the sump 42. According to the operation of the drain valve 50, the contaminant-containing washing water (rinsing water) is drained through the drain pipe 52 (S152).

In conclusion, the total volume of the standard course of the present invention is pre-washed (4L) + main wash (5L) + pre-rinse (4L) + last rinse (5L) = 18L, the conventional standard course (5LL4 = 20L) The water consumption can be reduced by about 10%, and the increase in the injection hole area ratio of the discontinued injection nozzles 26b can eliminate the increase of the washing time or the deterioration of the washing efficiency due to the reduction of the used amount. In addition, it is possible to reduce the operation of the lower injection nozzle (26c) it is also possible to maintain the electrical equipment during long-term use.

As described above, according to the dishwasher and the control method according to the present invention, it is possible to reduce the amount of water used and to ensure the washing performance while maintaining the washing time.

In addition, the present invention can increase the cleaning performance by changing the area ratio of the nozzle injection port arranged in the upper, middle, lower, so that the injection amount of the stop nozzle to the maximum, and the amount of water used in the preliminary stroke carried out before entering the main stroke This reduces the amount of water needed for the entire stroke.

Claims (10)

A washing tank, a dish box provided in the washing tank to store dishes, and a plurality of nozzles for spraying washing water into the dish box, The plurality of nozzles are each formed with injection holes for spraying the washing water, Dispensing holes formed in the plurality of nozzles is characterized in that the area is formed different from each other. The method of claim 1, The plurality of nozzles are composed of upper, middle and lower nozzles respectively installed on the upper and lower and middle portions of the dish basket, The interruption nozzle is dishwasher, characterized in that for increasing the injection amount compared to the lower nozzle than the injection nozzle area of the lower nozzle than the injection nozzle area of the lower nozzle. The method of claim 2, The interruption nozzle is a dish washing machine, characterized in that a plurality of injection holes for spraying to the upper nozzle and a plurality of injection holes for spraying to the lower nozzle. The method of claim 2, Further comprising a control unit for controlling the flow path of the washing water supplied to the upper, middle and lower nozzles, The control unit dishwasher, characterized in that for at least one of the plurality of strokes for washing the dishes using the washing water to set the water supply amount less than the water supply of the other stroke. The method of claim 4, wherein Wherein said one stroke is pre-washing or pre-rinsing. The method of claim 5, Further comprising a circulation pump for circulating the washing water in the washing tank to guide to the upper, middle and lower nozzles, The control unit is a dishwasher, characterized in that to control the washing water is sprayed through the top and stop nozzles in accordance with the operation of the circulation pump during pre-wash or pre-rinse. In the control method of the dishwasher comprising a washing tank, a dish box provided in the washing tank for storing the dishes, a plurality of nozzles for spraying the washing water into the dish box, and a heater for heating the washing water, At least one of the plurality of strokes for washing the dishes using the washing water is a control method of the dishwasher, characterized in that the water supply amount is set less than the water supply amount of the other stroke. The method of claim 7, wherein And wherein the one stroke is a stroke in which the heater operation is not performed. The method of claim 8, The stroke in which the heater operation is not performed is a pre-washing or pre-rinsing control method of the dishwasher. The method of claim 7, wherein And detecting a washing water level of the washing tank to control a water supply operation to supply washing water to the washing tank when the detected washing water level is lower than or equal to a predetermined low water level in the heater operation section.

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