KR100424307B1 - Dish Washer and Water Supply / Distribution Method the Same - Google Patents

Abstract

The present invention relates to a dishwasher and a water supply / drainage method thereof. In a water supply stroke using a flow sensor, the number of pulses generated while water flowing from the water supply valve passes through the flow sensor is counted as the reference number. The water supply valve is operated until the number of pulses is counted, and during the drainage stroke, the drainage pump is driven for a predetermined time, and then the washing motor is driven to drive the washing nozzle. After the next stroke is performed, there is an effect that can prevent the generation of noise and energy waste due to the change in quantity due to the deviation of the sensor and the air pressure.

Description

Dish Washer and Water Supply / Distribution Method the Same}

The present invention relates to a dishwasher and a water supply / drainage method thereof, and more particularly, to a dishwasher and a water supply / drainage method thereof capable of preventing noise generation and improving energy performance.

Recently, as the use of the dishwasher is greatly increased, the development of the dishwasher that meets the needs of the user is also greatly increased. In particular, even if the dishwasher having the same function as the quality of life is improved, the user's choice is often influenced by additional features such as noise level and energy consumption during operation.

In a conventional dishwasher, a pressure sensor is most often used to perform water supply / drainage. That is, after detecting the water level frequency from the change in air pressure according to the quantity by applying a pressure sensor to detect the water level of the dishwasher, calculate the normal water level and the reset water level from the detected water level frequency and accordingly the quantity in the washing tank It detects and proceeds with water supply, washing, draining and drying.

1 and 2 is a flow chart illustrating a water supply / drainage method of a conventional dishwasher.

First, as shown in FIG. 1, when the water supply stroke is started (S1), it is determined whether or not the quantity in the washing tank is above the normal level (S2), and if the water level is below the normal level, the water supply valve is operated (S3) while the normal water level In the case of abnormality, the stroke following water supply proceeds (S4).

Also, as shown in FIG. 2, when the drain stroke is started (S11), it is determined whether the amount of water in the washing tank is equal to or less than the reset level (S12), and if the reset level is binomial, the drain pump is operated (S13) and reset. If it is above the water level, the stroke following drainage proceeds (S14).

That is, in the water supply stroke, the water supply valve is driven until the normal water level frequency is detected, and in the drainage stroke, the drain pump is driven until the reset water level is detected.

However, according to the horseshoe of the pressure sensor unit and the horseshoe of the air pressure according to the temperature, the quantity of water changes in the washing tank, and if the quantity is less than the standard quantity, the noise is generated. There is a problem of poor performance.

The present invention has been made to solve the above problems of the prior art, the purpose of which is to detect the level of normal water supply using a flow sensor and to generate the overall noise by detecting the reset level according to the on / off of the heater in the dishwasher An object of the present invention is to provide a dishwasher capable of preventing excessive energy consumption and a water supply / drainage method thereof.

1 is a flow chart illustrating a water supply method of a conventional dishwasher,

2 is a flow chart illustrating a drainage method of a conventional dishwasher;

3 is a view showing the configuration of a typical dishwasher,

4 is a view showing a configuration of a dishwasher controller according to the present invention;

5 is a flowchart illustrating a dishwasher water supply method according to the present invention;

6 is a flowchart illustrating a dish washer drainage method according to the present invention.

<Explanation of symbols on main parts of the drawings>

18: controller 21: washing motor drive unit

22: heater driving unit 23: heater detection unit

24: microcomputer unit 31: heater switch unit

32: sensor

According to a feature of the dishwasher according to the present invention for solving the above problems, a washing tank, a sensor unit mounted to a water supply valve so that a pulse is generated when water is passed through the washing tank, and water supplied through the water supply valve. A heater for heating the heater, a heater switch unit which is opened and closed so that the heater is turned on / off according to the water pressure of the washing tank, and when the water supply valve is driven in response to a pulse generated from the sensor unit, the off of the heater is sensed. It is configured to include a controller that allows the cleaning operation following drainage to proceed.

In addition, according to a feature of the water supply method of the dishwasher according to the present invention, the first step of mounting the flow sensor to the water supply valve for supplying water to the washing tank of the dishwasher, and the flow when the water supply stroke of the dishwasher is in progress A second step of generating a pulse as the feedwater passes through the sensor, a third step of comparing whether the number of pulses generated in the second step and the number of reference pulses are equal, and the number and reference of pulses generated in the third step If the number of pulses is not the same, the second and third steps are repeated, and if the pulse number is the same, the fourth step is performed after the water supply.

In addition, according to a feature of the drainage method of the dishwasher according to the present invention, the first step of setting the drainage pump driving time of the dishwasher, and the drainage pump driving time by the set drainage pump driving time as the drainage stroke of the dishwasher is started A second step in which the washing motor of the dish washing machine is driven after the driving of the dishwasher, and a third step of detecting whether the heater for heating the water supplied to the dishwasher is driven after the washing motor is driven in the second step. And the second and third steps are repeated when the heater is turned on as detected in the third step, and when the heater is turned off, the washing motor and the drain pump are turned off, and the fourth step is performed after the drainage. Is made of.

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

Here, the general dishwasher applicable to the present invention, as shown in Figure 3, the sump (2) for collecting the water supplied to the lower center of the washing tank (1), and the water supply of one side of the sump (2) A washing motor 4 is provided for sending water to the washing vane, and the washing motor 4 has a pump casing 5 in which one inlet and two outlets are formed, and one of the pump casings 5 is provided. The inlet is connected to the sump 2 and the two outlets are connected to the lower nozzle guide 6 and the water guide 7, respectively.

On the other hand, the lower nozzle guide (6) is located at the lower center of the washing tank (1) to fix the flow path and the lower washing blade (8) for sending the water sent from the pump casing (5) to the han nozzle by the operation of the washing motor (4). It plays a role. Injection holes (not shown) are formed in the lower washing blade 8 and are positioned above the lower nozzle guide 6 to spray water into the washing tank 1 while rotating by the spraying force of the washing water.

The water guide 7 serves as a flow path for sending the water sent from the pump casing 5 to the upper nozzle guide 10 located above the washing tank 1, and the upper nozzle guide 10 is the upper dish shelf 11. It is fixed in the center of the water sent from the water guide (7) to the upper washing blade (9). An injection hole is formed in the upper washing blade 9 to wash the dishes in the upper dish shelf 11 while rotating by the spraying force of the washing water.

On the other side of the sump (2) there is a drain pump 13 for discharging the water supplied to the outside. 14 is a heater installed between the washing tank 1 and the lower washing blade 8 to heat the water supplied.

On the other hand, the water supply valve 16 is supplied to the washing tank (1) through the air guide 15, when a certain level of water is supplied to the washing tank 1, a constant resistance is sensed by the water level sensor (17) and the controller ( 18) The water supply is shut off.

4 shows the configuration of the controller 18 of the dishwasher according to the present invention.

As shown, the controller 18 is mounted on the washing motor driving unit 21 for driving the washing motor 4 and the washing tank 1 to determine whether to drive the heater 14 according to the water pressure. Whether the heater 14 is driven or not by opening or closing the heater switch unit 31 and whether the heater 14 is turned on or off according to whether the heater switch unit 22 is opened or closed. The pulse generated by the sensor unit 32 mounted on the water supply valve 16 to generate a pulse when the water passing through the heater detection unit 23 and the water supply valve 16 is supplied to the washing tank 1 through the water supply valve 16. Counting and determining the driving of the water supply valve according to the counted number, and at the same time, determining the flow to the next washing stroke according to whether the heater 14 sensed by the heater detecting unit 23 is on or off. It consists of a microcomputer part 24.

In this case, the microcomputer unit 24 is set in advance with information on the reference drive time of the drain pump (13). Therefore, after the start of the drain stroke, the microcomputer unit 24 counts the driving time of the drain pump 13 and turns on the washing motor 4 when the driving time of the drain pump 13 is equal to or greater than the reference driving time. Drive the washing motor (4).

In addition, as the washing motor 4 is driven, the water pressure of the washing tank 1 is changed, and the heater switch unit 31 is opened and closed in accordance with the water pressure. Therefore, when water is present in the washing tank 1, the heater switch unit 31 is closed and the heater driving unit 22 is driven. When no water is present in the washing tank 1, the heater switch unit 31 is opened and the heater detector 23 detects that the heater 14 is off. As the heater detection unit 23 detects the off of the heater 14, the microcomputer unit 24 turns off the washing motor 4 and at the same time turns off the drain pump 13 and then washes after drainage. Allow the administrative construction to proceed.

In addition, the sensor unit 32 is composed of a flow sensor.

5 and 6 illustrate a water supply / drainage method of the dishwasher according to the present invention.

First, as shown in FIG. 5, the water supply stroke is started in the twenty-first step. (S21)

In a twenty-second step, the microcomputer unit counts the number of pulses generated as water passes through the sensor unit. (S22)

In a twenty-third step, the microcomputer compares and determines whether the counted pulse number is equal to or greater than a preset reference pulse number. (S23)

If the counted number is less than the reference number in the twenty-third step, in the twenty-fourth step, the microcomputer unit drives the water supply valve (S24) and returns to the twenty-second step.

On the other hand, if the counted number in the twenty-third step is more than the reference number in the twenty-fifth step the microcomputer unit so that the washing stroke after the water supply proceeds (S25).

Further, as shown in Fig. 6, the drain stroke is started in the 31st step. (S31)

In the step 32, the microcomputer unit counts the driving time of the drain pump. (S32)

In operation 33, the microcomputer unit determines whether the driving time of the drain pump is greater than or equal to a preset reference driving time. (S33)

If the driving time counted in step 33 is greater than or equal to the reference time, the cleaning motor is turned on. (S34)

In the step 35, the microcomputer detects the on / off of the heater through the heater detector. (S35)

If the heater is turned off in the 35 th step, the microcomputer unit turns off the washing motor and the drain pump. (S36) On the other hand, when the heater is turned on in the 35 th step, the process returns to the 32 th step.

After the washing motor and the drain pump are turned off, the microcomputer unit proceeds to a drying stroke, in which the microcomputer unit washes following drainage in step 37. (S37)

On the other hand, when the drain pump driving time is less than the reference time in the 32nd step, the microcomputer unit to drive the drain pump in step 38 to continue the drainage stroke. (S38)

In the dishwasher and the water supply / drainage method of the present invention configured as described above, the number of pulses generated while water flowing from the water supply valve passes through the flow sensor during a water supply stroke using a flow sensor is set as a reference. The water supply valve is driven until the number of pulses is counted, and during the drainage stroke, the drainage pump is driven for a predetermined time, and then the washing motor is driven to drive the washing nozzle. After the detection, the next stroke is performed to prevent noise generation and energy waste due to variation in quantity due to sensor deviation and air pressure deviation.

Claims (6)

A washing tank; A sensor unit mounted to a water supply valve so that a pulse is generated when water is passed through the washing tank; A heater for heating water supplied through the water supply valve; A heater switch unit configured to be opened and closed to turn on / off the heater according to the water pressure of the washing tank; And a controller configured to drive the water supply valve according to the pulse generated by the sensor unit and to perform a washing stroke following drainage when the heater is detected to be off. The method of claim 1, The controller includes a washing motor driving unit for driving the washing motor of the dishwasher; A heater driving unit driving the heater by the heater switch unit which is opened and closed according to the water pressure of the washing tank when the washing motor is driven; A heater detector configured to detect whether the heater is on or off according to whether the heater switch is opened or closed; Depending on whether the heater detected by the heater detection unit on / off proceeds the washing stroke following the drainage and at the same time counting the pulse generated in the sensor unit and the water supply valve until the count is equal to the reference number Dishwasher comprising a microcomputer to drive. , The method of claim 2, The microcomputer of the dishwasher is configured to determine whether to drive the drainage pump according to whether the heater is detected by the heater detection unit after driving the drainage pump of the dishwasher for a reference time when draining. Dishwasher. A first step of attaching a flow sensor to a water supply valve for supplying water to the washing tank of the dishwasher; A second step of generating a pulse as water is passed through the flow sensor when a water supply stroke of the dishwasher is in progress; A third step of comparing whether the number of pulses generated in the second step is equal to the number of reference pulses; If the number of pulses generated in the third step and the reference pulse number is not the same, the second and third steps are repeated, and if the same, the dishwasher comprising a fourth step of proceeding the washing stroke after the water supply Watering method. A first step of setting a drainage pump driving time of the dishwasher; A second step of driving the washing motor of the dishwasher after the drainage pump is driven for the set drainage pump driving time as the drainage stroke of the dishwasher starts; A third step of detecting whether the heater for heating the water supplied to the dishwasher is turned on or off after the washing motor is driven in the second step; And a fourth step in which the second and third steps are repeated when the heater is turned on as detected in the third step, and the washing motor and the drain pump are turned off when the heater is turned off and a washing stroke following drainage is performed. Dishwasher drainage method, characterized in that made. The method of claim 5, wherein And the heater is turned on when there is water in the washing tank in the third step, and the heater is turned off when there is no water in the washing tank.