KR101003414B1 - apparatus and method for leakage-detecting of dishwasher - Google Patents

Abstract

The present invention is to provide a leak detection device of the dishwasher that can effectively detect the leak in the event of a failure and failure of the leak detection device in the dishwasher, by detecting the leak through the switching of the plot switch through the leak detection control circuit In the dishwasher detecting device for discharging water in the tub by discharging water in the tub and displaying a leak error message, the leak detection control circuit includes a control unit for controlling the entire system of the dishwasher, and a power supply to each part of the circuit. A power supply unit for supplying, a load driving unit for driving a necessary load under the control of the controller, a leak detector for detecting a leak and outputting a high signal to the controller when a leak occurs, and a leak for detecting a leak Output the high signal to the controller through the same data line as the detector Which may consists of including an error detection section.

Dishwasher, leak detection system

Description

Leak detection device and its method of dishwasher {apparatus and method for leakage-detecting of dishwasher}

Figure 1a, 1b is a view showing a leak detection device for a dish washer according to the prior art

2 is a view showing a leak detection control circuit of the dish washing machine according to the prior art

Figure 3a, 3b is a view showing a leak detection device of the dishwasher according to the present invention

4 is a view showing a leakage detection control circuit of the dishwasher according to the present invention.

5 is a view showing another embodiment of a leak detection control circuit of the dish washing machine according to the present invention;

6 is a flowchart illustrating a leak detection method of the dish washing machine according to the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

10: leak detection unit 11, 500: plot switch

12, 700: connector 13, 52: stabilizer

20: control unit 30: load driving unit

40: power supply 50: tub

60: motor pump 70: drainage pump

100: base cover 200: guide part

300: Styrofoam 400: leak detection control circuit                 

600: water

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher, and more particularly, to a leak detecting apparatus and a method for effectively detecting a leak when a dishwasher is broken and defective.

In general, dishwashers are sanitary and efficient dishwashing machines, and have various effects such as reducing household work by rationalizing dishes after eating.

In the United States, where the shape and material of the tableware is constant, it has been released since the early 1960s, and in Korea, there are many tableware shapes, and the performance of the tableware is poor, and starch is easy to eat with rice. Development is inferior due to reasons not falling.

It is for home use and for mass cooking, and for home use, there are automatic hot water floor installation type and small table type used in direct connection to hot water supply equipment such as instant hot water dispenser. By rinsing off the dirt with detergent solution and drying after finishing washing.

In addition, it is also used as a storage (保管 庫), depending on the warm water and washing effect can be expected to sterilization effect.

Mass cooking is available in the form of a conveyor using ultrasonic vibration and spraying.                         

Such a dishwasher is a household appliance using water, and leaks are generated as a problem that can easily occur. And since it is installed in the living room or kitchen, unlike other household appliances that use water, the leaked water flows to the living room floor or the kitchen floor, so the leak must be controlled more effectively than other products.

In general, the leak detection device used in the dishwasher detects leaks by switching the plot switch. The base cover is formed on the lower part of the water supply tank (tub). The plot switch installed in the center of the switch operates to detect the leak.

1A and 1B are diagrams illustrating a leak detecting apparatus for a dish washing machine according to the related art.

Referring to FIGS. 1A and 1B, the leak detecting apparatus is formed by forming a lower portion of the tub 50 and containing a leaked water, and when the water is filled in the base cover 100, the upper portion may be under negative pressure. And a styrofoam 300 that is turned off, and is switched off and then turned on in contact with the styrofoam 300 that rises according to the leakage water level, and the styrofoam 300 The guide unit 200 for inducing the correct switching of the plot switch 500 by fixing the left and right movement of the, and detect the leakage through the switching of the plot switch 500 and drives the drain pump 70 to the base cover ( It is composed of a leak detection control circuit 400 for discharging water in the 100 and at the same time indicating a leak error message.                         

And the tub 50 and the leakage detection control circuit 400 is configured to include a motor pump for supplying the washing water used for washing the dish.

At this time, the leak detection control circuit 400 is shown in FIG.

Referring to FIG. 2, the leak detection control circuit 400 will be described. A controller 20 for controlling the entire system of the dishwasher, a power supply unit 40 for supplying power to each part of the circuit, and the controller 20 It is composed of a load driving unit 30 for driving the required load under the control of, and the leak detection unit 10 for detecting the leakage.

In addition, the leak detection unit 10 includes a plot switch 11 for switching on / off according to the leakage water level, a connector 12 and 700 connecting the plot switch 11 and the control unit 20; The stabilizer 13 is configured to filter the power input to the controller 20 with a stable and low noise power.

At this time, the stabilization unit 13 is composed of a π-type filter made of RC.

Referring to the accompanying drawings, the operation of the leak detection apparatus of the conventional dish washing machine configured as described above will be described in detail as follows.

First, when water is started in the water supply stroke, the dishwasher continues to supply water until the set water level is reached by supplying water into the tub 50.

When the water in the tub 50 reaches the normal water level, the water supply valve is turned off to terminate the water supply, and the set stroke is normally performed.

At the same time, it is detected whether a leak occurs, when the leak occurs, the water is filled in the base cover 100 formed on the tub 50 lower.                         

As such, when the water fills the base cover 100, as shown in FIG. 1B, the styrofoam 300, which is surrounded by the guide part 200 by negative pressure, floats upward.

At this time, the guide unit 200 is to suppress the left and right movement of the styrofoam 300 to induce only the movement up and down according to the water level of the water 600 in a fixed position.

When the water leaked to the base cover 100 is filled by the water level of the preset water 600, the styrofoam 300 that floats to the top is provided with the plot switches 11 and 500 installed on the bottom surface of the tub 50. In contact with each other, the leakage detection signal is transmitted to the leakage detection control circuit 400 through switching.

When the leak detection control circuit 400 is not in contact with the styrofoam 300 to the plot switch 500, that is, when a normal stroke is made, a low signal is input to the controller 20. When the styrofoam 300 rises and comes into contact with the plot switches 11 and 500 due to the occurrence of the high signal, a high signal is input.

In this case, when the low signal is input through the plot switches 11 and 500, the controller 20 in the leak detection control circuit determines that a normal water supply stroke is performed, and through the plot switches 11 and 500. If a high signal is input, it is determined that a leak has occurred.

When the low signal is input and the low signal is input, a normal stroke is sensed, and when a high signal is input, it is regarded as a leak and stops the stroke process and drives the drain pump 70 through the load driving unit 30. The water in (50) is discharged and a leaking error message is displayed.

At this time, the plot switches 11 and 500 maintain the off state while performing a normal stroke, and when the leakage occurs, the plot switches 11 and 500 continue to be in the on state until the water is drained by the drain pump.

However, the leak detection device and method of the conventional dish washing machine described above are located in the case of contact failure of the connector connecting the plot switch and the control unit, and in the case of being accidentally inserted or cut off, or in the middle of cutting and cutting the circuit. In the event of a failure of the device, even if a signal is inputted to the control unit, a leak occurs because the signal is continuously input as a low signal in a normal state.

Therefore, the present invention has been made to solve the above problems, to provide a leak detection device and method of the dish washer that can effectively detect the leakage in the event of failure and failure of the leak detection device in the dishwasher. have.

Another object of the present invention is to provide a leak detection device and a method of a dishwasher, which can be inspected together with a leak detection through a controller that detects a leak without a separate additional resource.

A feature of the leak detection device of the dishwasher according to the present invention for achieving the above object is to detect the leak by switching the plot switch through the leak detection control circuit and to drive the drainage pump to discharge the water in the tub and In the dishwasher who detects a leak error message at the same time, the leak detection control circuit is a control unit for controlling the entire system of the dishwasher, a power supply for supplying power to each part of the circuit, and necessary control under the control of the control unit A load driver for driving a load, a leak detector for detecting a leak and outputting a high signal to the controller when a leak occurs, and a high signal to the controller through the same data line as the leak detector for detecting a leak and detecting a leak. It is configured to include an error detection unit for outputting.

In this case, the error detection unit preferably includes a second plot switch for switching on when no leakage occurs, and a connector connecting the second plot switch and the first stabilization unit in the leak detection unit.

In addition, the error detection unit filters the second plot switch to be turned on when no leakage occurs, the connector connecting the second plot switch and the control unit, and the power input to the control unit with stable and low noise power. It is preferable that it is comprised including the 2nd stabilization part.

In addition, the signals stabilized in the first stabilizing unit and the second stabilizing unit, respectively, are input through the same data line.

A feature of the leak detection method of the dishwasher according to the present invention for achieving the above object is the step of performing a water supply until the normal water level is set through the water supply stroke, and the first plot switch and the second plot switch Sensing a voltage value of a signal input to one data line through switching, and comparing the sensed voltage value with a preset value and inspecting states of the first plot switch and the second plot switch; When the first plot switch is in an off state and the second plot switch is in an on state, the inspection result is that there is no failure and failure of the leak detection device and no leakage occurs, and a normal stroke is performed. As a result of the inspection, if the first plot switch remains in the on state and the second plot switch remains in the off state, it is determined that a leak has occurred and the process proceeds. To discharge the water in the tub by driving the drain pump, and as a result of the inspection, the first plot switch and the second plot switch are both turned on, or the first plot switch and the second plot switch are both turned off. If so, it is determined that a failure and failure of the leak detection device has occurred and comprises the step of displaying an error occurrence message.

In this case, in the step of detecting the voltage value of the input signal, it is preferable to stabilize the voltage output from R3 connected in parallel via a connector in the first stabilization unit and input a high signal to the controller.

In the detecting of the voltage value of the input signal, it is preferable to input the high signal stabilized in the second stabilization unit through the connector to the controller.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of embodiments with reference to the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a device for detecting leakage of a dishwasher according to the present invention and a method thereof will be described below with reference to the accompanying drawings.

Figure 3a, 3b is a view showing a leak detection device of the dishwasher according to the present invention.

Referring to FIGS. 3A and 3B, a leak detecting apparatus is formed. A base cover 100 is formed at a lower side of a tub 50 to contain water and a negative pressure when water is filled in the base cover 100. The styrofoam 300 rises by the upper portion, the plot switch 800 in contact with the styrofoam 300 rises according to the leakage water level and is switched on (on) / off (off), and the left and right movement of the styrofoam The guide unit 200 is fixed and guides the accurate switching of the plot switch 500, and the switching and the switching of the switch 500 to detect the failure and failure of the leak detection device and leakage and the drain pump 70 It is composed of a leak detection control circuit 400 for driving to discharge the water in the tub 50 and at the same time indicating a leak error message.

At this time, the leak detection control circuit 400, as shown in Figures 4 and 5, the control unit 20 for controlling the entire system of the dishwasher, the power supply unit 40 for supplying power to each part of the circuit, Under the control of the control unit 20, the load driving unit 30 for driving the necessary load, the leak detection unit 10 for outputting a high signal to the control unit 20 when the leak is detected and whether the leak occurs, and whether It is composed of an error detector 50 for detecting and outputting a high signal to the controller 20 through the same data line as the leak detector 10 when the leak is not generated.

At this time, the leak detection unit 10 is a connector (12) (700) for connecting the first plot switch 11 and the first plot switch 11 and the control unit 20 to switch on when the leakage occurs. ), And a first stabilization unit 13 for filtering the power input to the control unit 20 to a stable and low noise power.

The error detection unit 50 may be represented by two embodiments as shown in FIGS. 4 and 5.

As shown in FIG. 4, the error detection unit 50 includes a second plot switch 51 for switching on when no leakage occurs, and a first stabilization in the second plot switch 51 and the leakage detection unit 10. It consists of a connector (12) (700) for connecting the portion (13).

As another embodiment, as shown in FIG. 5, the error detection unit 50 connects the second plot switch 51 and the second plot switch 51 and the controller 20 to switch on when no leakage occurs. Connector 12 and 700, and a second stabilization unit 52 for filtering the power input to the control unit 20 with a stable and low noise power.

In this case, since the signals stabilized in the first stabilizing unit 13 and the second stabilizing unit 52 and input to the control unit 20 are input through the same data line, the control unit 20 stabilizes the first stabilization. The signals input from the (13) section and the second stabilization (52) section are controlled separately.

The first stabilization unit 13 is composed of a π-type filter composed of resistors R1, R2 and capacitor C1, and the second stabilization unit 52 is composed of a π-type filter composed of resistors R3, R4 and capacitor C2. It is preferable that the resistance values of at least one of R1 and R3 or R2 and R4 have different values.

As described above, the operation of the leak detection device of the dish washing machine according to the present invention will be described in detail with reference to the accompanying drawings.                     

6 is a flowchart illustrating a leak detection method of the dish washing machine according to the present invention.

As shown in FIG. 6, when water is started in the water supply stroke, the dishwasher continues to supply water until the water is supplied into the tub 50 to reach the set normal water level (S10).

When the water in the tub 50 reaches the normal water level, the water supply valve is turned off to terminate the water supply, and the set stroke is normally performed.

At the same time, it detects the leakage.

The leak occurrence test first checks the states of the first plot switch 11 configured in the leak detector 10 and the second plot switch 51 configured in the error detector 50, respectively.

As a result of the state inspection of the first and second plot switches 11 and 51, the first plot switch 11 maintains an off state (S20), and the second plot switch 51 maintains an on state. The lower surface S30, the leak detection control circuit 400 does not receive a signal from the first plot switch 11.

In this case, two embodiments can be described as shown in FIGS. 4 and 5.

As shown in FIG. 4, when the second plot switch 51 and the first stabilization part 13 in the leak detector 10 are electrically connected to each other via the connector 12, the connector 12 ( The high signal stabilized by R3 and the first stabilization unit 13 through 700 is input to the control unit 20.

As shown in FIG. 5, the connector 12 and the 700 are electrically connected to the control unit 20 via the second plot switch 51 and the second stabilizing unit 13 through the connector 12. The high signal stabilized by the second stabilization unit 52 is input to the control unit 20 through the.

In this way, the controller 20 senses the voltage value of the signal input to one data line through the leak detector 10 and the error detector 50, and the voltage value input from the leak detector 10. According to the difference in the voltage value input from the error detector 50 to detect whether or not the leakage occurs.

In this case, the voltage value input from the leak detector 10 and the voltage value input from the error detector 50 vary depending on the resistance values of R3 and / or R4. Is defined.

Therefore, as a result of the state inspection of the first and second plot switches 11 and 51, the first plot switch 11 is maintained in an off state (S20), and the second plot switch 51 is in an on state. In operation S50, when the voltage value input from the error detector 50 is inputted to the control unit 20, the leak detection apparatus does not have a failure and a defect, and thus no leakage occurs. .

As a result of the state inspection of the first and second plot switches 11 and 51, the first plot switch 11 maintains an on state (S20) and the second plot switch 51 maintains an off state. In operation S50, when the voltage value input from the leak detector 10 is input to the controller 20, it is determined that a leak occurs in the dish washer.

Referring to Figure 3a, 3b when the leakage occurs in detail, when the water is filled in the base cover 100, the styrofoam 300 is surrounded by the guide portion 200 by the negative pressure as shown in Figure 3b This rises to the top.                     

At this time, the guide unit 200 is to suppress the left and right movement of the styrofoam 300 to induce only the movement up and down according to the water level of the water 600 in a fixed position.

When the water leaked into the base cover 100 fills the water level of the preset water 600, the styrofoam 300, which floats upward, comes into contact with the first plot switch 11 installed on the bottom surface of the tub 50. The leakage detection signal is transmitted to the leakage detection control circuit 400 through switching.

At this time, the first plot switch 11 is maintained in an off state from the off state, the second plot switch 51 is configured in the leak detection control circuit 400 and the state of the first plot switch 11 It stays in the opposite state, keeping it in the off state from the on state.

Accordingly, when the first plot switch 11 is maintained in an on state (S20) and the second plot switch 51 is maintained in an off state (S50), the leak detection control circuit 400 is configured to perform the first plot switch. The high signal stabilized in the first stabilization unit 13 is input to the controller 20 through the connector 12 in the one plot switch 11.

As such, a signal output from the error detector 50 is normally input to the controller 20 among the leak detector 10 including the first plot switch and the error detector 50 including the second plot switch. If the signal output from the leak detection unit 10 is input to the control unit 20 at any moment, a leak occurs in the dish washer without a breakdown or failure of the leak detection device. In this case, the administration progress is stopped (S60), the drainage pump 70 is driven through the load driver 30 to discharge the water 600 in the tub 50 and at the same time shows a leak error message (S70).                     

At this time, the first plot switch (11) (500) is maintained in the off state while performing a normal stroke, if the leakage occurs, the on-off state continues until the water is driven by the drain pump 70 is driven Done. In addition, the second plot switch 51 maintains an on state while performing a normal stroke, and if a leak occurs, the second plot switch 51 maintains an off state until water is discharged by driving the drain pump 70.

As a result of the state inspection of the first and second plot switches 11 and 51, when the normal stroke is performed, the signal is transmitted from the error detector 50 to the controller 20 due to the OFF of the second plot switch 51. Is not inputted (S50), or the controller 20 may be connected to either the leak detector 10 or the error detector 50 by turning off the first plot switch 11 and turning off the second plot switch 51. If there is no signal input to the (S30) indicates that the failure and failure of the leak detection device has generated an error message (S80).

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

The leak detection device and method of the dish washing machine according to the present invention as described above has the following effects.

First, it is possible to effectively detect leaks by detecting leaks and failures of the leak detection device in the dishwasher.

Second, the leak detection device may be inspected together with the leak detection through a control unit for detecting a leak without additional resources.

Claims (8)

In the dishwasher leak detection device for detecting a leak by switching the plot switch through the leak detection control circuit to drive the drain pump to discharge the water in the tub and at the same time the leak error message, the leak detection control circuit A control unit for controlling the entire system of the dishwasher, A power supply unit supplying power to each part of the circuit, A load driver for driving a load required under the control of the controller; A leak detector for detecting a leak and outputting a high signal to the controller when a leak occurs; An error detector for detecting a leak and outputting a high signal to the controller through the same data line as the leak detector when a leak is not generated; The error detection unit A second plot switch to switch on if no leakage occurs; And a connector connecting the second plot switch and the first stabilization unit in the leak detection unit. delete The method of claim 1, wherein the error detection unit And a second stabilizing unit configured to filter the power input to the control unit with a stable and low noise power. The method of claim 3, wherein The device of claim 1, wherein the signal stabilized in the first stabilizing unit and the second stabilizing unit and input to the control unit are input through the same data line. The method of claim 4, wherein The first stabilization part is composed of a π-type filter composed of resistors R1, R2 and condenser C1, and the second stabilization part is composed of a π-type filter composed of resistors R3, R4 and condenser C2, and the R1 and R3 or R2 and R4. At least one of the resistance value of the leak detection device of the dishwasher, characterized in that having a different value. delete delete delete

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