KR20010064895A - Preliminary washing device and method of a dish washer - Google Patents

Abstract

PURPOSE: A pre-washing method of a dish washer is provided to improve the washing efficiency at an initial washing by melting an appropriate detergent in washing water. CONSTITUTION: A microcomputer(7) contains a door state discriminating unit(71); an initial power on discriminating unit(72); a rinsing water temperature discriminating unit(73); a first water level discriminating unit(74) to discriminate a filling with water; a timer(75); a preparation executing unit(76); and a pre-washing executing unit(77). A detergent of specific amount is melted in washing water by operating a washing pump and a detergent supply motor before a washing stand-by step after finishing a supply of the washing water. Dishes are washed with the washing water melting the detergent. Thereby, the washing efficiency is improved.

Description

Preliminary washing device and method of a dish washer}

The present invention relates to a preliminary washing apparatus and method of the dishwasher, and more particularly, when the power is initially supplied to the dishwasher and the full water level is detected, the washing pump and the detergent supply motor are operated for a predetermined time through a preliminary washing unit. It is invented to perform a pre-washing function so that the detergent can be dissolved in the wash water to significantly improve the cleaning power during the initial washing.

Generally, a dish washing machine has a predetermined volume of a washing chamber formed in a casing, an upper and lower sliding doors are installed at an upper portion of the washing chamber, and a filter for filtering debris contained in the washing water at the bottom of the washing chamber, and a predetermined depth. Rinsing tank having a washing machine, a heater for maintaining the washing water at a predetermined temperature or more, and at the same time rinsing the hot water (ie, rinsing water) heated by the booster, including a washing water pump for sending the water in the washing tank to the washing nozzle A rinse pump for feeding water to the water nozzle is installed, as well as a motor for detergent and rinse supply, and a pair of washing nozzles for rinsing water and rinsing water to dishware and a pair of rinsing water nozzles, respectively, in the upper and lower parts of the washing chamber. It is installed, the middle portion of the washing tank is configured to be installed a shelf containing various dishes.

Therefore, when the user opens the door of the dishwasher, puts the dishes to be cleaned on the shelf, closes the door again, and turns on the power switch, the washing water pump is driven for a predetermined time, so that the water in the washing tank is forced by the washing water pump. Since the washing nozzle is rotated by the water pressure of the water sprayed through the water sprayer, the dishes on the shelf are washed, and then, after a certain time, the driving of the washing water pump is blocked and the rinsing pump is driven for a predetermined time. The rinsing water, which is the hot water heated by the booster, is forcibly sent by the rinsing pump, and the rinsing water nozzle is rotated by the water pressure of the water sprayed through the water sprayer, so that the dishes washed on the shelf and primarily washed are rinsed. The water used for washing and rinsing the dishes should be To the water exchange with the washing tank after the foreign substances are removed it is used for cleaning the subsequent other dishes.

On the other hand, when the initial power is turned on in the dishwasher in the above it detects the water level in the washing tank through the pressure switch and if the water level is not full, the rinsing pump is driven to prepare the operation to supply the water heated by the booster to the washing tank. If the rinsing water is not determined by determining whether there is a rinsing water through the carbon rod before the preparation operation as described above, if the rinsing water cannot be filled, the rinsing water is filled, and when the rinsing water is filled to some extent, the combustion operation of the booster starts.

When the rinse water reaches 85 ℃ by this combustion operation, the rinsing pump is intermittently operated to fill the washing water in the washing tank.When the washing water reaches the full water level, the washing water enters the washing standby state. .

At this time, the dish washing power is the washing power and rinsing water temperature, detergent and rinse in the washing water and rinsing water to improve the washing power only when the appropriate concentration is dissolved, if any of these are not dissolved according to the conditions, the washing power is lowered.

By the way, conventionally, since the washing tank is filled with rinsing water having a predetermined temperature without supplying detergent and rinsing when the initial power is turned on, the temperature of the washing water is adjusted when the washing tank reaches the full water level, but the detergent is not dissolved in an appropriate amount. Detergency when washing, there is a problem that the detergent is dissolved to some extent in the wash water must be washed 7-8 times after the washing power is properly released.

Therefore, the present invention has been made in order to solve the above-mentioned problems, the initial power is turned on and the washing water at a predetermined temperature by the operation of the rinsing pump flows into the washing tank to the high water level washing pump for a predetermined time in the pre-cleaning execution unit The main purpose of the present invention is to provide a preliminary washing apparatus and method for the dishwasher, which can greatly improve the washing power during initial washing by allowing the detergent supply motor to operate so that an appropriate amount of detergent can be dissolved in the washing water.

The object of the present invention is to detect whether the door state determination unit, the initial power "on" determination unit, the rinsing water temperature determination unit, the washing water full level in the microcomputer to perform the overall control function of the dishwasher through a predetermined program. 1 Install the water level discrimination unit, timer, preparation stage execution unit, and pre-cleaning execution unit, and if the door is closed when the power is turned on and the washing water in the washing tank is not full water level, operate the rinsing pump for a certain time and repeat the operation. In the initial operation control method of the dishwasher in which the rinsing water at a predetermined temperature is introduced into the washing tank until the washing tank reaches the full water level, the washing pump is circulated by operating the washing pump before entering the washing standby state. The detergent supply motor is operated for a predetermined time so that a predetermined amount of detergent can be dissolved in the washing water. It can be achieved by adding.

Therefore, since the initial power is turned on and the washing water is replenished before the washing process, an appropriate amount of detergent is maintained in the washing water. Therefore, even when the dish is washed for the first time, the dishes are washed through the washing water in which the proper amount of detergent is dissolved. Can greatly improve the cleaning power according to the initial cleaning.

1 is an overall block diagram of a dish washer controller to which the present invention is applied.

2 is a detailed block diagram of a device of the present invention;

3 is a flowchart for explaining the method of the present invention.

Explanation of symbols on the main parts of the drawings

1: Door opening and closing detection unit 2: First water level detection unit

3: 2nd water level detection part 4: Power electronic valve drive part

5 oscillation part 6 reset circuit part

7: microcomputer 8: self-test and optional switch unit

9: washing pump 10: washing pump relay drive circuit

11: rinsing pump 12: rinsing pump relay drive circuit

13: bimetal 14: heater

15: heater relay drive circuit 16: detergent supply motor

17: rinse supply motor 18: display and switch input

19: breaker 20: booster drive circuit

21: Thermistor input circuit 71: Door state determination unit

72: initial power "on" determination unit 73: rinse water temperature determination unit

74: first level determination unit 75: timer

76: preparation step execution unit 77: preliminary washing execution unit

78: washing pump drive command unit 79: detergent supply motor drive command unit

80: rinse pump drive command unit

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

1 is a block diagram showing the overall block diagram of a dishwasher control unit to which the present invention is applied, and according to this, a door open / close detection unit 1 detecting whether the door is opened or closed through a door switch; A first water level detector (2) for detecting the water level in the washing tank through the pressure switch; A second water level detector (3) for detecting a low water level and a high water level in the rinsing water tank through two carbon rods having different lengths; A hydraulic valve driver 4 for controlling the supply of the washing water and the rinsing water; An oscillator 5 for generating a clock pulse of a predetermined frequency; A reset circuit section 6 for resetting initial predetermined data, programs, and the like; A microcomputer 7 performing overall control of the dishwasher through a predetermined program; A self test and option switch unit 8 connected to the microcomputer 7 to select a self test function; A washing pump relay (9a) driving circuit unit (10) for controlling the driving of the washing pump (9) under the control of the microcomputer (7); A rinsing pump relay (11a) driving circuit unit (12) for controlling the driving of the rinsing pump (11) under the control of the microcomputer (7); A heater relay (14a) driving circuit unit (15) for controlling the driving of the heater (14) connected in series with the bimetal (13) by controlling the microcomputer (7); A detergent supply motor 16 for selectively supplying detergent to washing water under the control of the microcomputer 7; A rinse supply motor 17 for selectively receiving the microcomputer 7 and supplying detergent to rinsing water; A display and switch input unit 18 for displaying various operating signals under the control of the microcomputer 7 and inputting various signals; A circuit breaker 19 for cutting off a power supply voltage during an overload; A booster driving circuit section 20 including a combustion fan driving circuit, an igniter driving circuit, and several magnet valve driving circuits controlled by the microcomputer 7 including a flame detection circuit and the like; It consists of thermistor input circuit 21 which detects the temperature of the hemnum water with an electrical signal.

2 is a detailed block diagram of the apparatus of the present invention. The door state determination unit 71 receives an output signal of the door open / close detection unit 1 into the microcomputer 7 and determines whether the door is opened or closed. ;

An initial power "on" determination unit 72 for determining whether initial power is input to the dishwasher itself;

A rinsing water temperature determining unit (73) for determining a temperature of the washing water through a signal output from the thermistor input circuit (21);

A first water level determination unit 74 for determining whether the washing water is full water level through an output signal of the first water level detection unit 2;

A timer 75 for providing time data for driving the respective pumps in the preparation step execution unit 76 and the pre-clean execution unit 77;

The initial power is input by receiving output signals from the door state determination unit 71, the initial power "on" determination unit 72, the rinse water temperature determination unit 73, and the first water level determination unit 74. Is closed, the rinsing water temperature is maintained at a predetermined temperature outputs a drive signal to the rinse pump driving command unit 80 for a predetermined time (T1), and when the predetermined time (t2) has elapsed, the first water level determination unit (74) A preparation step execution unit 76 which directly performs the washing preparation process of repeating the process of detecting whether the washing water is full level;

After a predetermined control signal is generated after completing all processes in the preparation step execution unit 76, the motor is controlled by the washing pump driving command unit 78 and the detergent supply motor driving command unit 79 under the control of the timer 75. It is characterized by including a preliminary washing execution unit 77 for outputting a driving command.

On the other hand, Figure 2 shows a flow chart for explaining the method of the present invention, according to the initial power is turned on to detect whether the washing water of the washing tank is full water level, if the water level is full, the heater is opened and the door is opened and closed to detect whether When it is closed, it performs the washing waiting stage and the washing start stage, and if the door is closed while the water level is not full, the rinsing pump is operated for a certain time and the operation is repeated, and the rinsing water of the predetermined temperature is introduced into the washing tank until the washing tank reaches the full water level. In the initial operation control method of the dishwasher consisting of a process of performing a washing water supply step to go to the washing standby step after

Before the washing water supply step is completed, the washing pump and the detergent supply motor are operated for a predetermined time to allow the predetermined amount of detergent to be dissolved in the washing water before the washing water supply step is completed. Then, the cleaning preparation light emitting diode is turned off and the ready buzzer is removed. It is characterized in that it is added to the process to further perform the pre-washing step ringing for a predetermined time.

The operational effects of the apparatus and method as described above will be described below.

First, the initial power "on" determination unit 72 in the microcomputer 7 performing the overall control function of the dishwasher through a predetermined program detects whether the power is initially turned on because the power switch is initially "on". In the initial power-on state, a predetermined signal is output to the display and switch input unit 18 to generate a few seconds (e.g., 2-3 seconds) to indicate that the power supply voltage is supplied. Lights up and detects whether the water in the washing tank is full water level through the first water level determining unit 74 which receives the output signal of the first water level detecting unit 2 which detects the water level in the washing tank through the pressure switch.

As a result, if the water level is not high, the output of the door opening / closing detection unit 1 which turns on the light emitting diode for cleaning preparation display installed in the display and switch input unit 18 and detects whether the door is opened or closed through the door state determining unit 71 It receives a signal and continuously detects whether the door is closed.

As a result of detecting the state of the door as described above, if it is detected that the door is closed by the user, the output signals of the initial power "on" determination unit 72, the first water level determination unit 74, and the door state determination unit 71 are output. The preparation step execution unit 76 receiving the input outputs a predetermined control signal to the rinsing pump driving command unit 80 to drive the rinsing pump 11 for a predetermined time T1 determined by the timer 75, and then for a predetermined time. The process of stopping during (T2) is repeatedly performed until the washing tank reaches the full water level to perform a washing water supply process of filling the washing tank with water warmed by the booster at a predetermined temperature.

At this time, it is preferable to set the stop time T2 of the rinsing pump 11 to be longer than the driving time T1, because the water already heated in the booster is delivered to the washing tank within the driving time of the rinsing pump 11. This is to fully heat the fresh water flowing into the booster again.

On the other hand, when the washing water supply process is completed, the washing standby operation and the washing start step is not immediately entered as in the prior art, and the preliminary washing execution unit 77 in the microcomputer 7 supplies the washing pump driving command unit 78 and detergent supply. By outputting a predetermined control signal to the motor driving command unit 79, the washing pump 9 and the detergent supply motor 16 are operated for a predetermined time T3 determined by the timer 75 so that a predetermined amount of detergent is added to the washing water. After a predetermined time T3 has elapsed after sufficient dissolution, the preparation stage execution unit 76 turns off the cleaning preparation light emitting diode installed in the display and switch input unit 18 and pre-cleans the preparation buzzer for a predetermined time. Further processing is followed by a wash wait and a start of wash.

In other words, in the present invention, after the initial power is turned on and the washing water is replenished, the detergent is kept in an appropriate amount of detergent in the washing water prior to the washing. The dishes can be washed, which greatly improves the cleaning power of the initial washing.

In addition, in the above, when the water level of the washing tank is detected at the initial stage of power-on, when the water level of the washing tank reaches the full water level because the washing water is supplied from the booster installed in the washing machine to heat the direct water, 7) will perform the washing wait and the washing start step.

That is, when the temperature of the washing water is detected and is lower than the predetermined temperature (for example, 60 ° C.), the heater 14 is driven to maintain the predetermined temperature of the washing water, and the heater 14 is driven as described above. In the meantime, the door is continuously detected whether the door is opened and closed. This is to check whether the user opens the door after the supply of the washing water is completed and puts various dishes into the washing machine and closes the door again.

As a result of detecting the state of the door as described above, when the door is opened and closed again, the dish is washed by a conventionally known method (for example, a part of the operation control method of the dishwasher proposed by the applicant in 1998 patent application No. 11112). You will be taken to the start.

As described above, according to the present invention, when the initial power is turned on and the washing water at a predetermined temperature is introduced into the washing tank by the operation of the rinsing pump to reach the full water level, the washing machine and the detergent supply motor are operated for a predetermined time so that an appropriate amount of detergent is washed. So that it can be dissolved in, it is possible to wash the dishes using the washing water in which the appropriate amount of detergent is dissolved even when the dishes are washed for the first time, which greatly improves the washing power according to the initial washing and greatly improves the reliability and productability of the product. It can be improved.

Claims (2)

A door state determination unit 71 which determines whether the door is opened or closed by receiving an output signal of the door opening / closing detection unit 1 in the microcomputer 7 performing the overall control function of the dishwasher through a predetermined program; An initial power "on" determination unit 72 for determining whether initial power is input to the dishwasher itself; A rinsing water temperature determining unit (73) for determining a temperature of the washing water through a signal output from the thermistor input circuit (21); A first water level determination unit 74 for determining whether the washing water is full water level through an output signal of the first water level detection unit 2; A timer 75 for providing time data for driving the respective pumps in the preparation step execution unit 76 and the pre-clean execution unit 77; The initial power is input by receiving output signals from the door state determination unit 71, the initial power "on" determination unit 72, the rinse water temperature determination unit 73, and the first water level determination unit 74. Is closed, the rinsing water temperature is maintained at a predetermined temperature outputs a drive signal to the rinse pump driving command unit 80 for a predetermined time (T1), and when the predetermined time (t2) has elapsed, the first water level determination unit (74) A preparation step execution unit 76 which directly performs the washing preparation process of repeating the process of detecting whether the washing water is full level; After a predetermined control signal is generated after completing all processes in the preparation step execution unit 76, the motor is controlled by the washing pump driving command unit 78 and the detergent supply motor driving command unit 79 under the control of the timer 75. A pre-washing device for a dish washer, characterized by comprising a pre-wash execution unit 77 for outputting a drive command. Detecting whether the washing water in the washing tank is at full water level when the power is initially supplied, and if the water level is full, turning on the heater and detecting whether the door is opened and closed, and performing the washing wait and start of washing steps when the water is closed; As a result of the above detection, if the door is closed in a state other than the full water level, the rinsing pump is operated for a predetermined time, and the operation is repeated to inject the rinsing water of a predetermined temperature into the washing tank until the washing tank reaches the full water level, and then supply the washing water to the washing standby stage. In the initial operation control method of the dishwasher consisting of performing a step, Before the washing water supply step is completed, the washing pump and the detergent supply motor are operated for a predetermined time before entering the washing standby step, so that a preliminary washing step for dissolving a predetermined amount of detergent in the washing water is further performed. How to prewash your dishwasher.