KR20080082483A - Washing apparatus - Google Patents

Abstract

A washing apparatus is provided to sense a large volume of bubbles, reduce generated bubbles efficiently, and obtain insulation performance of parts by sensing a water level, using a float part and a switch, and sensing the water leakage state from a water level sensing tub. An opening(100a) is arranged at the front of a body(100) of a washing machine. A washing tub(101) is drawn in and out through the opening of the body. A washing nozzle(102) is rotated at the center of the bottom part of the washing tub, and a heater(103) is installed in a lower position than the washing nozzle. Dish baskets(105) are arranged at an upper side of the heater to receive dishes(104). A drainage(106) of the washing tub passes through a pipe(107) and connects with a water level sensing tub(108). A float part(109), which is placed in the water level sensing tub, is moved vertically. A water level switch(110) is arranged at an upper side of the float part and is interlocked with vertical movement of the float part. A water leakage sensing part(114) is arranged at the bottom part of an outer container(113) to sense the water leakage from the water level sensing tub.

Description

Cleaning device {WASHING APPARATUS}

This invention relates to the washing | cleaning apparatus which generate | occur | produces foam and washes, such as a dishwasher which washes and drys dishes.

For example, a dishwasher of the kind disclosed in, for example, Japanese Patent Laid-Open No. 2003-220009 has a configuration as shown in FIG.

3 is a side sectional view of a conventional dish washing machine described in Patent Document 1, and the configuration thereof will be described below.

In FIG. 3, the opening part 30a is provided in front of the dishwasher main body 30 of the conventional dishwasher, The washing tank 1 is attached so that the opening part 30a can pass through.

In the center of the bottom part of the washing tank 1, the washing nozzle 2 is rotatably arranged, and the heater 3 is arranged, and the dish basket 5 which accommodates the tableware 4 is provided above. Moreover, the washing tank 1 communicates with the water level detection tank 6 provided in the vicinity via the piping 17. The float part 7 is provided in the water level detection tank 6 so that the float part 7 can move to an up-down direction, and above the float part 7 the water level switch 8 which works | moves in conjunction with the movement of the float part 7 in the up-down direction. ) (Hereinafter referred to as "switch 8") is disposed. The water level detection part which detects a water level by the float part 7 and the switch 8 is comprised.

The auxiliary pipe 10 branched from the drain pipe 9 communicates with the water level detection tank 6, and is configured to clean the inside of the water level detection tank 6 at the time of drainage. Moreover, the leak detection part 12 is provided in the bottom part of the outer box 11, and the leak from the water level detection tank 6 is detected.

The water supply valve 13 which is a water supply part is provided in the upper part of the side surface of the washing tank 1, and the drain port 16 which drains the water supplied to the washing tank 1 is provided in the bottom part of the washing tank 1. As shown in FIG. The pump device 15 (hereinafter referred to as "pump 15") sucks the washing water in the washing tank 1 from the drain port 16, pumps the washing water into the washing nozzle 2, and removes the washing water from the washing nozzle 2. Spray the washing water. The washing water 4 sprayed strongly from the washing nozzle 2 washes the dishes 4 accommodated in the dish basket 5, and the washing water is sucked from the drain 16 again. The hot water is heated by the heater 3 while repeating such a circulation, and the washing | cleaning effect is raised. Control of each component, such as opening and closing of the switch 8 and opening and closing of the water supply valve 13, is performed by the control unit 14.

The pump 15 functions as a washing pump as described above, and after discharging the dirty washing water to the outside of the apparatus after each of the washing steps and the rinsing steps described later, the discharge side is switched to the drain pipe 9. It also functions as a drainage device or a drainage pump.

4 is an operation flowchart of a conventional dish washing machine. 4, the operation of the conventional dish washing machine will be described.

At the beginning of each operation step, when the power switch (not shown) of the dishwasher is turned on (S41), the start switch (not shown) is turned on (S42), and the water supply valve 13 is opened (S43). Water is supplied from the valve 13 to the cleaning tank 1. When water is supplied into the washing tank 1, the float portion 7 rises as the water level in the water level detecting tank 6 rises, and when the predetermined water level is reached, the switch 8 is turned on (S44). Yes). When the switch 8 is turned on, the control unit 14 closes the water supply valve 13 (S45), and the water supply is stopped.

Thereafter, the pump 15 and the heater 3 are turned on (S46), and the washing water in the washing tank 1 is sucked from the drain port 16 by the pump 15 and pumped to the washing nozzle 2. , It is strongly ejected from the cleaning nozzle 2. By this strongly sprayed washing water, the dishes 4 housed in the dish basket 5 are washed.

The washing water strongly injected from the washing nozzle 2 is sucked from the drain port 16 again, and is sprayed strongly from the washing nozzle 2 once again. The hot water is heated by the heater 3 while repeating such a circulation, and the washing | cleaning effect is raised.

Thereafter, with the switch 8 being in an off state (YES in S47), when it is determined that the cleaning of the predetermined time has ended by the time management of the pump 15, the temperature management of the washing water, or the like, the pump 15 ) And the heater 3 are turned off (S49), the cleaning is stopped, and the pump 15 is turned on for drainage (S50). When the drainage is completed, the pump 15 is turned off (S51), the cleaning step is completed.

Thereafter, the rinsing step is performed by repeating the steps from step S43 to step S51 three times (S52).

Thereafter, the drying fan (not shown) turns on (S53), the heater 3 turns on (S54), and after drying the dishes, the heater 3 turns off (S55), and the drying fan turns off. (S56), the drying step is completed. After that, the power switch is turned off (S57), and all ends.

By the way, especially foaming is easy to generate | occur | produce in the washing | cleaning step in order to circulate the wash water containing many detergent components. Therefore, in order to suppress the generation of bubbles due to the circulation of the washing water, a dedicated detergent having a low content of the surfactant is usually used. However, when a detergent having a high content of the surfactant is accidentally added and operated, the washing water is circulated. At the same time as this progresses a large amount of foam is generated. The foam is moved to the water level detection tank 6 which is in communication with the washing tank 1 as it is, and when the switch 8 is turned on continuously for 5 seconds in step S48 (example of S48), the foam It is determined that the abnormality has occurred, and a prescribed number of bubble reduction steps for performing the drainage operation and the water supply operation are carried out.

That is, the pump 15 and the heater 3 for cleaning off (S58), the pump 15 for turning on (S59), after draining, the pump 15 for draining off (S60) ), The water supply valve 13 is opened (S61) to supply water. When predetermined water is supplied to the washing tank 1, the switch 8 is turned on (YES in S62), the water supply valve 13 is closed (S63), and water supply is stopped. This reduces foaming. The bubble reduction step from step S59 to step S63 is repeated twice (S64).

If the switch 8 does not turn on even after 20 minutes have elapsed in steps S44 and S62 (NO in S64 and NO in S62), it is determined that an abnormality has occurred and an abnormality report is executed (S65). And S66).

In this way, the occurrence of abnormality of the bubble is detected, the bubble overflows from the water level detection tank 6, and the leak detection unit 12 provided at the bottom of the outer box 11 acts to prevent the leak.

However, in such a conventional dishwasher, since only the prescribed number of foaming steps are executed regardless of the degree of foaming, when the concentration of the surfactant in the washing water is high, even if the prescribed foaming step is carried out, the surfactant is sufficient. Without dilution, bubbles are generated again, the leak detection unit 12 acts, and the operation is stopped.

In addition, even when the concentration of the surfactant in the washing water is light, even if the switch 8 is turned on in the step S48 and the foam reduction step is performed, although the foam reduction step may not be performed to that extent, Since only the prescribed number of times performs the bubble reduction step, there is a problem that the cleaning time is long as a result.

In addition, depending on the concentration of the surfactant in the washing water, bubbles are rapidly generated, and before the switch 8 is turned on for 5 seconds in step S48, a blowing path communicating with the washing tank 1 ( When bubbles invade and further bubbles are generated, even a blower (not shown) penetrates, leading to a decrease in blowing performance and a decrease in insulation resistance.

In addition, since the foam reduction step is performed only for the prescribed number of times regardless of the degree of foaming, when the concentration of the surfactant in the washing water is high, the surfactant is not diluted even after the foam reduction step, and bubbles are generated again. Similarly, when a bubble enters the blowing path communicated with the cleaning tank 1 and bubbles are generated further, it has a problem that it intrudes into the blower and causes a decrease in blow performance and a decrease in insulation resistance.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problem, and even if a user accidentally adds and operates a detergent having a high content of surfactant, the surfactant is sufficiently diluted to prevent the apparatus main body from being unusable. It is possible to provide a cleaning device that is possible.

It is also an object of the present invention to provide a washing apparatus which operates at an appropriate washing time without taking time for the bubble reduction step when the concentration of the surfactant in the washing water is thin.

Further, an object of the present invention is to perform a bubble reduction step appropriately even when bubbles are rapidly generated due to the concentration of the surfactant in the washing water, to suppress the generation of bubbles and to prevent bubbles from entering the blower. The present invention provides a highly reliable cleaning apparatus that does not cause a decrease in air blowing performance and a decrease in insulation resistance.

In order to solve the said conventional subject, the washing | cleaning apparatus of this invention is a washing tank provided in the apparatus main body which has an opening part in the front, the washing | cleaning nozzle arrange | positioned in a washing tank, the pump part which pumps washing water to a washing nozzle, Water supply part for supplying water into the tank, drainage part for draining the water in the cleaning tank, water level detection part for detecting the water level in the cleaning tank, bubble detection part for detecting abnormality of bubbles in the cleaning tank, and operation of each part And a control unit to control the control unit, and when the bubble detecting unit detects an abnormal occurrence of bubbles, the control unit operates a bubble reduction step of performing drainage from the washing tank and water supply to the washing tank based on the amount of bubbles generated. It is to be.

By this structure, the washing | cleaning apparatus of this invention performs a foam reduction step according to the generation amount of foam | bubble, even if a user accidentally injects and operates detergent with a high content of surfactant, foaming more than before. The reduction step can be executed. Therefore, the bubble overflows from the water level detection tank or the like provided with the water level detection unit, whereby the water leakage detection unit operates, the operation of the apparatus main body is stopped, and the state of use is not disabled.

In addition, since it is possible to prevent intrusion of bubbles into the blowing path and the like, it is possible to prevent a decrease in the amount of blown air due to the intrusion of bubbles, that is, a decrease in drying performance, and an electrical insulation performance by adhesion of the bubbles to the charging part of the blower. Can also be prevented.

In addition, when foam detection is carried out when the concentration of the surfactant in the washing water is low, the amount of foaming is small. Therefore, by performing an appropriate foam reduction step such as reducing the number of foam reduction steps, it is unnecessary to operate. It is possible to omit the time and to operate the apparatus main body efficiently.

The washing apparatus according to the present invention can detect a large amount of bubbles with a simple configuration, and can also reduce bubbles generated efficiently. In addition, it is possible to secure the electrical insulation performance of parts such as blowers connected to the cleaning tank and to prevent operation stop due to the operation of the leak detection unit, and is safe and reliable. It can be applied to various equipment such as a washing machine for generating a.

The washing apparatus of the present invention includes a washing tank provided in the apparatus main body having an opening in the front, a washing nozzle disposed in the washing tank, a pump unit for pumping the washing water into the washing nozzle, and a water supply unit for supplying water into the washing tank. And a drain for discharging water in the washing tank, a water level detecting unit for detecting the water level in the washing tank, a bubble detecting unit for detecting abnormality of bubbles in the washing tank, and a control unit for controlling the operation of each unit. In the case where the bubble detection unit detects an abnormal occurrence of bubbles, the bubble reduction step is performed to perform drainage from the inside of the washing tank and water supply to the washing tank based on the amount of bubbles generated.

With this configuration, the cleaning apparatus of the present invention can repeat the bubble reduction step according to the amount of foam generation, so that even if a user accidentally inserts and operates a detergent having a high content of surfactant, the foam reduction step is performed. It can be executed more than before. Therefore, the bubble overflows from the water level detection tank or the like provided with the water level detection unit, whereby the water leakage detection unit operates, the operation of the apparatus main body is stopped, and the state of use is not disabled.

In addition, since it is possible to prevent intrusion of bubbles into the blowing path and the like, it is possible to prevent a decrease in the amount of blown air due to the intrusion of bubbles, that is, a decrease in drying performance, and an electrical insulation performance by adhesion of the bubbles to the charging part of the blower. Can also be prevented.

In addition, when foam detection is carried out when the concentration of the surfactant in the washing water is low, the amount of foaming is small. Therefore, useless foaming steps, such as reducing the number of foaming steps, reduce wasteful operation. It is possible to skip the time and operate the cleaning device efficiently.

In addition, the washing | cleaning apparatus of this invention guesses the generation amount of foam | bubble according to the time and the frequency | count when a bubble detection part detected abnormality of a bubble.

According to this configuration, for example, when the time or the number of times of detecting abnormality of foam is small, it is assumed that the amount of foaming is large, and when the time or the number of times of detecting the abnormality of foam is large, the amount of foaming is small. Since the amount of bubbles generated in the cleaning tank can be estimated with a simple configuration, various controls based on the amount of bubbles generated can be easily performed.

Moreover, the washing | cleaning apparatus of this invention makes a bubble detection part detect abnormality | occurrence | production of the bubble in a washing tank by the output of the water level detection part.

By this structure, since the detection of the water level in the washing tank and the occurrence of abnormality of bubbles can be detected in a simple configuration, a highly reliable washing apparatus can be provided.

In addition, the cleaning apparatus of the present invention allows the control unit to increase or decrease the number of times of the foam reduction step to be operated upon the occurrence of abnormality of the foam, based on the amount of foam generation.

By this structure, when it is estimated that foam | bubble generate | occur | produces a lot, the waste water from the washing tank of a foam reduction step and the recovery of the water supply to a washing tank can be made a lot. In addition, when it is estimated that generation | occurrence | production of a foam | bubble is few, the waste water from the washing tank of a foam reduction step, and the collection | recovery of the water supply to a washing tank can be made small. In this way, it is possible to easily perform the bubble reduction step in accordance with the degree of abnormal occurrence of the bubbles in the cleaning tank.

Moreover, the washing | cleaning apparatus of this invention makes a control part operate the bubble detection part multiple times in the initial stage of a washing | cleaning step, and detects abnormality of foam | bubble.

With this configuration, since an abnormal occurrence of bubbles is detected at the beginning of the washing step in which bubbles are generated quickly, and a bubble reducing step is executed in accordance with the detected amount of bubbles generated, a highly efficient and reliable cleaning device can be obtained. Can be.

In addition, the washing apparatus of the present invention further includes a blowing unit for discharging steam in the washing tank from the exhaust port to the outside, and a blowing path for communicating the blowing unit with the washing tank, wherein the control unit foams at least once at the beginning of the washing step. The detection unit is operated to detect an abnormal occurrence of bubbles, and when the bubble detection unit detects an abnormal occurrence of bubbles, the blower is operated for a predetermined time at that time.

With this configuration, by operating the blower when the occurrence of abnormality of the bubble is detected, the bubble penetrating into the blowing path can be returned to the washing tank, whereby a decrease in the amount of blown air due to the intrusion of the bubble, namely drying performance The fall can be prevented. Moreover, the fall of the electrical insulation performance by adhesion of the foam | bubble to the charging part etc. of a blowing part can also be prevented.

Moreover, the washing | cleaning apparatus of this invention is made so that a control part may increase or decrease the operation time of the blowing part which operates at the time of abnormality of foaming based on the generation amount of foaming.

By this structure, when it is estimated that the amount of foam generation is large, it is possible to lengthen the blowing time, and when it is estimated that there is little generation of bubbles, the operation time of the blower can be shortened. Therefore, it is possible to reliably return the bubbles that have invaded the blowing path to the cleaning tank, and to reliably prevent a decrease in the amount of blown air due to the intrusion of bubbles, that is, a decrease in the drying performance. It is possible to prevent the deterioration of electrical insulation performance.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described, referring drawings. In addition, this invention is not limited by this embodiment.

(Embodiment)

BRIEF DESCRIPTION OF THE DRAWINGS It is a side sectional view of the dishwasher in one Embodiment of this invention.

In FIG. 1, the opening part 100a is provided in front of the dishwasher main body 100 of the dishwasher of this embodiment, and the washing tank 101 is attached so that entrance / exit is possible through the opening part 100a.

The cleaning nozzle 102 is rotatably disposed in the center of the bottom of the cleaning tank 101, and the heater 103 is disposed below the cleaning nozzle 102, and the tableware 104 is placed above the heater 103. The dish basket 105 to accommodate is provided. Moreover, the drain port 106 of the washing tank 101 communicates with the water level detection tank 108 provided in the vicinity through the piping 107.

The float part 109 is provided in the water level detection tank 108 so as to be movable in the vertical direction, and above the float part 109, the water level switch 110 which operates in conjunction with the vertical movement of the float part 109. ) (Hereinafter referred to as "switch 110") is disposed. The float level 109 and the switch 110 are comprised of the water level detection part which detects a water level.

An auxiliary pipe 112 branched from the drain pipe 111 communicates with the water level detection tank 108, and is configured to clean the inside of the water level detection tank 108 at the time of drainage. Moreover, the leak detection part 114 is provided in the bottom part of the outer box 113, and the leak from the water level detection tank 108 is detected.

The water supply valve 115 which is a water supply part is provided in the upper side of the cleaning tank 101, and the drain port 106 which drains the water supplied to the cleaning tank 101 is provided in the bottom part of the cleaning tank 101. The pump device 116 (hereinafter referred to as "pump 116") sucks the washing water in the washing tank 101 from the drain port 106, pumps the washing water into the washing nozzle 102, and removes the washing water from the washing nozzle 102. Spray the washing water. The washing water strongly sprayed from the washing nozzle 102 washes the dishes 104 accommodated in the dish basket 105, and the washing water is sucked from the drain hole 106 again. While repeating this circulation, the washing water is heated by the heater 103 to increase the cleaning effect. Control of each component such as opening and closing of the switch 110 and opening and closing of the water supply valve 115 is performed by the control unit 117.

The pump 116 functions as a washing pump as described above, and when discharging the dirty washing water to the outside of the apparatus as in the prior art, the discharge side is switched to the drain pipe 111 and also functions as a drainage device or a drain pump. .

Although the above structure is a structure similar to the conventional structure shown in FIG. 3, the dishwasher of this embodiment is provided with the air blower | hole (through the ventilation path 118 which communicates with the washing tank 101) to the washing tank 101. 119 has a blowing device 120 for introducing the wind.

That is, in the drying step after the washing step, the wind flowing into the washing tank 101 from the tuyere 119 by the blowing device 120 is warmed up by the heater 103 and rises above the heater 103. The dish 104 stored in the dish basket 105 is warmed, and the moisture of the dish 104 is evaporated. In addition, the air blower 120 blows the wind which flowed into the washing tank 101 together with the steam to the outside of the apparatus from the exhaust port 121 disposed above the washing tank 101 to dry the dishes 104. I'm making it.

The operation of the dish washing machine in the present embodiment configured as described above will be described with reference to FIG. 2. 2 is a flowchart illustrating the operation of the dish washing machine of the present embodiment.

In FIG. 2, when the user turns on the power switch (not shown) (S201) and turns on the start switch (not shown) (S202), the water supply valve 115 is opened (S203) and the cleaning tank ( 101 is supplied with water. Thereby, since the water level in the water level detection tank 108 which communicates with the washing tank 101 rises, the float part 109 also rises as the water level of the washing tank 101 raises. And the switch 110 which becomes a predetermined water level turns on (YES of S204), the water supply valve 115 is closed by the control part 117 (S205), and water supply is stopped. Thereafter, the pump 116 and the heater 103 are turned on by the control unit 117 (S206), and the washing water in the washing tank 101 is sucked from the drain port 106 by the pump 116, and the washing nozzle To 102. The washing water 104, which is pumped and strongly sprayed from the washing nozzle 102, washes the dishes 104 contained in the dish basket 105, and is sucked from the drain hole 106 again. The washing water is heated by the heater 103 while repeating such a circulation, and is configured to enhance the washing effect.

When the pump 116 is operated, in order to suck in the water in the washing tank 101, the water level in the washing tank 101 and the water level detection tank 108 is lowered, and the switch 110 is turned off. At this time, if a user mistakenly uses a detergent with a high content of surfactant, the circulation of the washing water proceeds and a large amount of bubbles are generated, and the bubbles are left as it is in the washing tank 101, the washing nozzle 102, and the pump ( 116, and enters the drain port 106. When the pump 116 is stopped in this state (S207), the water level of the washing tank 101 and the water level detection tank 108 is restored, and the switch 110 is turned on again. The time required from the stop of the pump 116 until the switch 110 is turned on again is that the drain hole 106 and the pipe 107 are filled with foam and the foam becomes a resistance, compared to the case where there is no foam. Longer Therefore, foam detection can be performed by defining the determination time of the presence or absence of foam | bubble with respect to the time required from the stop of the pump 116 until the switch 110 turns on again (S208). For example, if the time required from the stop of the pump 116 until the switch 110 is turned on again is shorter than the determination time, it is possible to determine that bubbles have occurred.

In addition, foam detection can be performed also by the conventional method. That is, it is also possible to determine by detecting a bubble when the switch 110 continues to turn on for a predetermined time after the pump 116 is turned on. In this case, it is possible to judge that abnormality is generated by the value of the predetermined time such as lengthening the predetermined time.

As mentioned above, in this embodiment, the float part 109 and the switch 110 comprise the water level detection part which detects the water level in the washing tank 101, and the abnormality of the bubble in the washing tank 101 generate | occur | produces. Also serves as a bubble detection unit that detects a, and the control unit 117 switches the operation of each unit.

After detecting the abnormality of the foam in step S208 (YES in S208), the blower 120 is turned on (S210) with the pump 116 and the heater 103 turned off (S209), and the predetermined After the time a, the blower 120 is turned off (S211). On the other hand, the pump 116 is turned on for drainage (S212), and the pump 116 is turned off after a predetermined time (S213) to complete drainage. After that, the water supply valve 115 is opened (S214) and water is supplied to the cleaning tank 101. When the water level in the washing tank 101 rises according to the water supply and the switch 110 is turned on (YES in S215), the water supply valve 115 is closed (S216). Thereafter, the bubble reduction step from step S212 to step S216 is repeated C times (S217).

As described above, after repeating the foam reduction step a predetermined number of times, the pump 116 is turned on, and if necessary, the heater 103 is turned on (S218) to perform cleaning in the cleaning tank 101. After a predetermined time, when the pump 116 is turned off and the heater 103 is turned on, the heater 103 is turned off (S219), and after the draining step, a rinsing step and a drying step are executed as before, and the dish is washed. To complete.

By the way, since the generation | occurrence | production of foam | bubble by the circulation of washing | cleaning water tends to be quicker with the detergent with a high content of surfactant, in this embodiment, the said foam detection is multiple times at the beginning of a washing | cleaning step (N times in FIG. 2). By performing, the generation | occurrence | production degree of a bubble can be known.

In other words, when foam generation is detected at the first time of foam detection, the amount of foam generation is large. In the Nth detection, it can be estimated that the amount of bubbles generated is small.

Thereby, the number of foam reduction steps (steps S212 to S216 in FIG. 2) to be executed after each bubble detection and to perform drainage from the cleaning tank 101 and water supply to the cleaning tank 101 are performed. By changing (X) with the number of foam detections, the number of foam reduction steps can be changed in accordance with the amount of foam generation.

For example, in FIG. 2, the number of times of foam reduction step (C, D, ..., X) is large in the case of the first time of foam detection, the second time in foam detection,. , The smaller the number of times detected at the Nth time, i.e., C? Let ≥X. As a result, when a large amount of bubbles is generated, a large amount of bubbles are discharged to the outside of the apparatus, and the operation of the leak detection unit 114 by leaking the washing water from the water level detection tank 108 into the outer box 113 is performed. You can prevent it. In addition, it is also possible to prevent bubbles from entering the blowing device 120 and the blowing path 118 which are in communication with the cleaning tank 101. When the amount of foam generation is small, the number of foam reduction steps can be reduced, so that even when foam detection is carried out, it is possible to return to the normal washing step early.

In addition, since the foam of the washing tank 101 is generated in a large amount, bubbles easily enter the blower 120 from the blower port 119 via the blower path 118, so that the blower after detecting the bubble ( The operating time x of 120 is changed in accordance with the number of times of foam detection.

For example, in FIG. 2, the operating time a of the blower 120 in the case of the bubble detection first is the longest, and the operating time b of the bubble detection second is next to the operating time a. briefly, … The operation time (x) of the Nth time is made the shortest. That is, a> b>…. > x, if the operation time is shortened as the bubble detection is detected from the first to the Nth time, the bubbles of the blower 120 and the blowing path 118 are efficiently and reliably removed from the blower port 119 by the washing tank 101. Can be returned to

In Fig. 2, when no foam is detected in step S208 (NO in S208), similarly to steps S206 to S208, first, the pump 116 and the heater 103 are turned on (S220). ), The cleaning in the cleaning tank 101 is performed. As a result, the switch 110 is turned off, and in this state, the pump 116 and the heater 103 are turned off (S221). As described above, after the pump 116 is turned off, foam detection is performed in the same manner as in step S208 according to the time until foaming occurs and the switch 110 is turned on (S222).

When the abnormality of the foam is detected in step S222 (YES in S222), similarly to step S209, in the state in which the pump 116 and the heater 103 are turned off (S223), similarly to step S210. In operation S224, the blower 120 is turned on. Thereafter, the blower 120 is turned off after the predetermined time b (S225).

On the other hand, the bubble reduction step from step S212 to step S216 is repeated D times less than C times (S226). After that, the pump 116 and the heater 103 are turned on (S218), the washing in the washing tank 101 is performed, the pump 116 and the heater 103 are turned off (S219), and the flow advances to the drainage step. do.

When the bubble detection is not detected in the second bubble detection of step S222 (NO in S222), the flow proceeds to the step of turning on the pump 116 and the heater 103 as described above (S228).

After that, several bubbles are detected, and when no bubble abnormality is detected in the N-1th bubble detection, the pump 116 and the heater 103 are turned off in the same manner as in step S207 (S229). . Then, the abnormality detection of the Nth bubble is performed according to the time from the pump 116 off to the ON of the switch 110 (S230).

When the abnormality of the foam is detected in step S230 (YES in S230), the pump 116 and the heater 103 are turned off (S231) and blown in the same manner as in the steps from S223 to S226. The apparatus 120 is turned on (S232), the blower apparatus 120 is turned off (S233) after a predetermined time (x), and the X repetitions (S234) of the bubble reduction step of steps 212 to S216 are executed. do.

In addition, in FIG. 2, in the step S204 and the step S215, when the switch 110 is not turned on even after a predetermined time elapses even after the water supply (NO in S204 and NO in S215), the apparatus main body is abnormal. Is judged to have occurred, and the above report is executed (S235 and S236).

Thus, according to this embodiment, the washing tank 101 provided in the dishwasher main body 100 which has the opening part 100a in front, the washing nozzle 102 arrange | positioned in this washing tank 101, and this washing nozzle A pump 116 for pumping the washing water into the 102, a water supply valve 115 for supplying water into the washing tank 101, a drain hole 106 for draining the water in the washing tank 101, and a pump ( 116, a water level detection unit for detecting the water level in the cleaning tank 101 by moving the float portion 109 in the water level detection tank 108 up and down to turn on the switch 111, and a cleaning tank ( The bubble detection part which consists of the float part 109 and the switch 110 which detects the abnormality occurrence of the bubble in 101 is provided, and the control part 117 which controls the operation | movement of these parts is provided, The control part 117 is a bubble The detection unit depends on, for example, the time from turning off the pump 116 to turning on the switch 110 in step S207. D) When the occurrence of abnormality of foam is detected, the amount of foam generation is estimated by the time and the number of times when the occurrence of abnormality of foam is detected, and according to the amount of generation, the drainage from the cleaning tank 101 and the washing tank ( A bubble reduction step of supplying water to 101 is operated.

By this structure, the dishwasher of this embodiment performs foam reduction step according to the amount of foam generation | occurrence | production, even if a user operates by inputting the detergent with a high content of surfactant by mistake, the foam level is It overflows from the water level detection tank 108 etc. provided with the detection part, and the water leakage detection part 114 operates by this, and operation | movement of the dishwasher main body 100 is stopped and it becomes impossible to become unusable.

In addition, since the intrusion of the foam into the blowing path 118 and the like can be prevented, it is possible to prevent a decrease in the amount of blowing due to the intrusion of the foam, that is, a decrease in the drying performance, and also to the charging portion of the foam blowing device 120. Deterioration of electrical insulation performance due to adhesion can also be prevented.

In addition, when foam detection is carried out when the concentration of the surfactant in the washing water is low, the amount of foaming is small. Therefore, by performing an appropriate foam reduction step such as reducing the number of foam reduction steps, it is unnecessary to operate. It is possible to skip the time and operate the dishwasher efficiently.

In addition, according to this embodiment, the generation amount of foam is estimated based on the time and the number of times when the bubble detection part which consists of the float part 109 and the switch 110 detected abnormality of foam.

According to this configuration, for example, when the time or the number of times of detecting abnormality of foam is small, it is assumed that there is a lot of foaming. When the time or the number of times of detecting abnormality of foam is detected, there is little foaming. It can be assumed that Therefore, since the amount of bubbles generated in the cleaning tank 101 can be estimated with a simple configuration, various controls based on the amount of bubbles generated can be easily performed.

In addition, after the pump 116 is turned off, the bubble detection part in this embodiment moves the water level in the washing tank 101, the float part 109 in the water level detection tank 108 moves up and down, and switches the switch 110. FIG. The abnormality of the bubble in the washing tank 101 is detected by the output of the water level detection part detected by turning on.

Therefore, since the occurrence of abnormality in the bubble can be detected in a simple configuration, it is possible to provide a dishwasher with high reliability.

In addition, in this embodiment, the control part 117 operates in the washing tank 101 of the foam reduction step which operates when a foam | bubble abnormality generate | occur | produces based on the time and the number of times when the foam | bubble detection part detected abnormality of foam | bubble. It is configured to increase or decrease the number of wastewater from the wastewater and the water supply to the washing tank 101.

Therefore, when the time and the number of times when abnormality detection of foam | bubble generation was detected are few, it is assumed that foam | bubble generate | occur | produces a lot, and it is possible to increase the number of times of drainage from the washing tank 101 and the number of water supply to the washing tank 101 in the foam reduction step. Can be. In addition, when the time and the number of times of detecting abnormality of foam generation are detected, it is assumed that the generation of foam is small, and the number of times of drainage from the cleaning tank 101 in the foam reduction step and the recovery of water supply to the cleaning tank 101 are determined. You can do less. Thereby, the bubble reduction step can be performed according to the generation | occurrence | production degree of the bubble in the washing tank 101. FIG.

In addition, in this embodiment, the control part 117 is comprised so that abnormality generation | occurrence | production of foam may be detected in the initial stage of a washing | cleaning step, and the generation amount of foam | bubble is estimated by the time and frequency which detected abnormality occurrence of foam | bubble, In accordance with the generated amount, a bubble reduction step of performing drainage from the washing tank 101 and water supply to the washing tank 101 is executed.

By this configuration, even if a user accidentally puts and operates a detergent having a high content of surfactant, foam detection can be performed at a time when bubbles are likely to occur, and bubbles overflow from the water level detection tank 108 and the like, It is possible to reliably avoid the unusable state of the dishwasher by operating the leak detection unit 114.

In addition, in this embodiment, the blowing apparatus 120 which discharges the vapor in the washing tank 101 from the exhaust port 121, and the blowing path 118 which communicates this blowing apparatus 120 and the washing tank 101 are made. The control unit 117 is configured to detect an abnormal occurrence of the bubble at least once at the beginning of the washing step, and when detecting the abnormal occurrence of the bubble, the blower 120 is predetermined at the time of detecting the bubble. At the same time, the bubble reduction step of performing drainage in the cleaning tank 101 and water supply to the cleaning tank 101 is performed.

By this structure, the bubble which penetrated into the blowing path 118 can be returned to the washing tank 101, and the fall of the blowing amount by the invasion of foam, ie, the fall of drying performance, can be prevented, and the bubble blowing device 120 Decrease in electrical insulation performance by adhesion to the charging part or the like can also be prevented.

In addition, in this embodiment, it is comprised so that the bubble detection part may increase or decrease the time of the blower 120 which operates when a bubble generate | occur | produces by the time and collection | recovery which detected abnormality of bubble.

By this structure, when time and the frequency | count of detecting abnormality generation | occurrence | production of foam | bubble are few, it is guessed that foam | bubble generate | occur | produces a lot and the blowing time by the blower 120 can be lengthened. In addition, when there are many time and frequency | counts which detected the abnormality generation of foam | bubble, it is estimated that foam | bubble generation is few, and the blowing time by the blower 120 can be shortened. Therefore, by returning the foam which penetrated into the blowing path 118 to the washing tank 101 reliably according to the quantity of foam which generate | occur | produced, the fall of the blowing amount by the invasion of foam, ie, the fall of drying performance, is reliably prevented. can do. Moreover, the fall of the electrical insulation performance by adhesion of the charging part of the bubble blowing device 120 can be prevented reliably.

In addition, in this embodiment, although the time until the switch 110 turns on after the pump 116 is turned off compared with the predetermined time, the number of repetitions C of the bubble reduction step was determined, but this invention is limited to this. The number of times of detecting the bubble can be terminated once by changing the number of repetitions C according to the length of time until the switch 110 is turned on.

As mentioned above, the washing | cleaning apparatus which concerns on this invention can detect the mass generation of foam | bubble with a simple structure, and can also reduce the foam | bubble which generated efficiently. In addition, it is possible to secure the electrical insulation performance of parts such as blowers connected to the cleaning tank and to prevent operation stop due to the operation of the leak detection unit, and is safe and reliable. It can be applied to various devices such as a washing machine for generating a.

1 is a side cross-sectional view of a dish washer according to one embodiment of the present invention;

2 is a flowchart showing the operation of the dishwasher according to the embodiment of the present invention;

3 is a side cross-sectional view of a conventional dishwasher,

4 is a flowchart illustrating the operation of a conventional dish washer.

<Description of the symbols for the main parts of the drawings>

100: dishwasher body 101: washing tank

102 cleaning nozzle 106 drain

108: water level detection unit 109: float portion

110: switch 111: switch

114: leak detection unit 115: water supply valve

116: pump 117: control unit

118: blowing path 120: blowing device

121: exhaust port

Claims (7)

The washing tank provided in the apparatus main body which has an opening part in the front, The washing nozzle arrange | positioned in this washing tank, The pump part which delivers washing water to this washing nozzle, The water supply part which supplies water to the said washing tank, And a drainage part for draining the water in the tank, a water level detection part for detecting the water level in the cleaning tank, a bubble detection part for detecting an abnormal occurrence of bubbles in the cleaning tank, and a control unit for controlling the operation of each part. When the bubble detection unit detects an abnormal occurrence of the bubble, the control unit is configured to operate a bubble reduction step of performing drainage from the cleaning tank and water supply to the cleaning tank based on the amount of foam generation. Characterized by Cleaning device. The method of claim 1, The generation amount of the bubble is estimated according to the time or the number of times the bubble detection unit detects the occurrence of abnormality of the bubble, characterized in that Cleaning device. The method of claim 1, The bubble detection unit detects an abnormal occurrence of bubbles in the cleaning tank by the output of the water level detection unit. Cleaning device. The method of claim 1, The control unit is configured to increase or decrease the number of times of reducing the bubbles to be operated when the abnormality of the bubbles occurs, based on the amount of bubbles generated. Cleaning device. The method according to any one of claims 1 to 4, The control unit operates the bubble detection unit a plurality of times at the beginning of the washing step to detect an abnormal occurrence of the bubble. Cleaning device. The method according to any one of claims 1 to 4, And a blower for discharging the steam in the washing tank from the exhaust port to the outside, and a blowing path for communicating the blower with the washing tank, wherein the control unit is configured to detect the foam at least once at the beginning of the washing step. Operating the blower to detect abnormality of the bubble, and when the bubble detector detects the abnormality of the bubble, the blower is operated for a predetermined time. Cleaning device. The method of claim 6, The control unit is configured to increase or decrease an operating time of the blower to be operated when an abnormality occurs in the bubble based on the amount of bubbles generated. Cleaning device.

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