JP2002336175A - Dishwasher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent new abnormal foaming when it has occurred during a cleaning operation. SOLUTION: When abnormal forming occurs and it is judged that an abnormal water level detection switch 83 is turned on for 0.2 second or more, a control section 71 operates a cleaning pump 10 for 50 seconds to drain almost all water in a cleaning tank 5, subsequently water is supplied by opening a water supply valve 5 and when 15 seconds have elapsed or a normal water level detection switch 77 is turned off, the water supply valve 5 is closed. Subsequently, the cleaning pump 10 is operated for cleaning, whereby water is jetted to the cleaning tank 5 from a nozzle arm 15, and a foam remaining on the inside wall of the cleaning tank 5 is washed away. The cleaning pump 10 is operated for 50 seconds for drainage, whereby a residual detergent is discharged out from the equipment together with water in the cleaning tank 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a dishwasher.

[0002]

2. Description of the Related Art Conventionally, in a dishwasher, washing water (water in which detergent is dissolved) stored in a washing tank is heated to a predetermined washing temperature by a heater, and the heated washing water is sent to a nozzle by a pump. There is a known configuration in which washing water is sprayed onto tableware by a nozzle to wash the tableware and then rinsed.

[0003] In such a dishwasher, if a general dishwashing detergent which is easy to foam is used, abnormal foaming occurs during the washing operation, which results in an extremely low washing performance and an intake of dry air. There is a possibility that bubbles may leak from the mouth and the exhaust port. For this reason, as a detergent for such a dishwasher, a dedicated detergent with a small foaming is used.

[0004]

Although the use of a special detergent is specified in an instruction manual or the like, a general dishwashing detergent may be mistakenly used by a user.

An object of the present invention is to propose a dishwasher capable of appropriately coping with abnormal foaming that occurs when a user mistakenly uses a general dishwashing detergent.

[0006]

Means for Solving the Problems and Effects of the Invention A dishwasher according to the present invention is a dishwasher for washing and rinsing dishes by spraying water collected at the bottom of a washing tank onto the dishes by the operation of the washing means. Abnormal foaming detecting means for detecting abnormal foaming in the cleaning tank, and during the cleaning operation, when abnormal foaming is detected by the abnormal foaming detecting means, the cleaning operation is stopped and the abnormal foaming is stored in the cleaning tank. Abnormality treatment means for draining the water.

In this configuration, if abnormal foaming occurs during the cleaning operation due to the use of a general dishwashing detergent which is likely to foam, the cleaning operation is stopped by detecting this. Therefore, since foaming stops further, foam leakage to the outside of the machine can be prevented. After the cleaning operation is stopped, the water in the cleaning tank is almost completely discarded by draining. Therefore, since water which is easily foamed is not used again in the cleaning operation, abnormal foaming can be prevented from occurring again when the next cleaning operation is performed.

[0008] It is preferable that the dishwasher further includes a foam erasing means for performing an operation of supplying water into the washing tank and eliminating bubbles after the drainage by the abnormality processing means is completed.

[0009] In this configuration, after draining, an operation is performed to further remove bubbles remaining in the washing tank. For example, water is supplied and drained to wash out bubbles in the washing tank to the outside of the machine. Alternatively, supply water to store new water in the washing tank, activate the washing means, spray water into the washing tank to wash the inside of the washing tank, eliminate bubbles in the washing tank, and then drain and drain the detergent with water. Discard the minute outside the machine. As a result, the remaining detergent can be removed, so that the occurrence of abnormal foaming when the cleaning operation is performed next can be further prevented.

[0010] The dishwasher may further comprise a notifying means for notifying an abnormality, and a notifying control means for notifying the notifying means of the foaming abnormality after drainage by the abnormality processing means is completed. preferable.

With this configuration, the user can be informed that the general dishwashing detergent has been used by mistake by notifying the foaming abnormality. In addition, since this notification is performed after the drainage is completed, the user does not turn off the power during the drainage and stop the drainage just when he / she notices.

In the above dishwasher, it is preferable that the notifying unit is configured to notify the notifying unit of the foaming abnormality at a time after the start of the defoaming operation by the defoaming unit.

With this configuration, even if the user who notices the notification turns off the power, at least a certain amount of bubble erasing operation can be ensured. It should be noted that the notification of the foaming abnormality is preferably performed after the bubble erasing operation is completed from the viewpoint of ensuring the complete bubble erasing operation. However, as long as the defoaming operation is performed to some extent, it may be before the defoaming operation is completed. In this case, not only the notification but also the user can actually confirm the presence of the foam.

When abnormal foaming occurs, the water level in the washing tank rises abnormally, so that the dishwasher uses the abnormal foam detecting means to clean the water level in the washing tank. An abnormal water level detecting means for detecting that an abnormal water level has become higher than the cleaning water level for operation can be provided. In this case, there is no need to have a dedicated means for detecting abnormal foaming, and the cost can be reduced.

However, in this case, even if a water supply abnormality occurs such that the water supply does not stop, there is a possibility that this may be regarded as a foaming abnormality.

For this reason, when the abnormal foaming detecting means is constituted by an abnormal water level detecting means, a drainage state for detecting whether or not the water is normally drained from the cleaning tank by the draining operation of the abnormal processing means. A detecting means, and when the abnormal water level is detected by the abnormal water level detecting means, and / or when the drainage state detecting means detects that the water level is abnormal, even if the drainage operation is performed by the abnormal processing means, It is preferable that when it is detected that the water is not drained, the notification control means causes the notification means to notify the malfunction of the device and the bubble erasing means does not perform the bubble erasing operation.

That is, in the case of abnormal foaming, since the water level is normally lowered by drainage, the abnormal water level detecting means immediately detects that the water level has stopped. Further, the drainage state detecting means detects that the drainage has been performed normally.

On the other hand, when the water supply valve fails and the water supply does not stop, or when the abnormal water level detecting means itself fails, the abnormal water level detecting means keeps detecting the abnormal water level even if draining is performed. Alternatively, the drainage state detection means detects that drainage is not performed normally. In the above configuration, when such a situation is detected, it is determined that there is no foaming abnormality, the apparatus is notified as a malfunction abnormality, and the bubble erasing operation is not performed. Therefore, the processing for the foaming is not continued unnecessarily, and a reliable processing can be performed.

The dishwasher further comprises an abnormal water level rise detecting means for detecting whether an abnormal water level rise has occurred in the washing tank during the foam erasing operation by the foam erasing means, When the abnormal water level rise detection means detects that an abnormal water level rise has occurred, the bubble erasing means stops the bubble erasing operation, and the notification control means causes the notification means to notify the device of a failure abnormality. Is preferable.

That is, in the case of a very slight leak of water from the water supply valve, there is a possibility that the drainage may be performed normally, and it may not be detected at the time of drainage. In this case, during the bubble erasing operation, an abnormal water level rise that does not occur in the normal bubble erasing operation occurs. In the above-described configuration, such a state is detected, the bubble erasing operation is stopped, and an alarm is issued as a device failure abnormality. Therefore, more reliable processing can be performed.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a dishwasher according to the present invention will be described below with reference to the drawings. The left and right expressions are based on the front view of the dishwasher.

As shown in FIG. 1, the dishwasher 1 of the present embodiment is of a so-called desktop type, and is installed in a space A (between a wall and a sink) beside a sink 101 of a sink 100. In addition, the front of the dishwasher 1, that is, the door 2 is installed so as to face the front of the sink 100, so that a user can easily put dishes in and out of the dishwasher 1.

This dishwasher 1 is different from the conventional table-top dishwasher in external dimensions, in that the width is considerably smaller than the depth, and the width: depth = 1: 1.5 or more. Specifically, the width W is about 335 mm and the depth D
Is about 520 mm and the height H is about 520 mm. (Figure 1
(See FIG. 3 from FIG. 3) Four legs 4 are provided on the bottom surface of the cabinet 3 in front, rear, left and right. The width X of the left and right legs 4 is about 1
90 mm. A dimension Y (hereinafter, referred to as a side-leg size) between one side surface of the cabinet 3 and the outermost bottom surface of the leg 4 far from the one side surface is about 280 mm.

Generally, in a commercially available sink, the narrowest space A beside the sink is 150 mm.
It is. Since a dishwasher needs to be able to wash a 270 mm platter, it is extremely difficult to realize a dishwasher that can be installed in this space. The next narrowest space A next to the sink is 300 mm. Therefore, in order to be able to be installed in a space of 300 mm in which one side is a wall, the above-mentioned side-leg dimension needs to be 300 mm or less.

If the width W is increased, the width X of the left and right legs 4 is reduced due to the relationship between the side surface and the leg size, and the dishwasher 1 cannot be stably supported. Therefore, in order to secure stable support, the width W is preferably set to 350 mm or less. Further, in order to accommodate a large plate of 270 mm, the width W needs to be 300 mm or more by design. Therefore, in the tabletop dishwasher 1 of the present invention,
The width W is preferably 300 mm or more and 350 mm or less.

By adopting the above dimensional configuration,
Even in a sink where there is not enough space A beside the sink 101, the sink 2 can be installed with the door 2 facing the front of the sink 100 (facing in the same direction).

A washing tank 5 is arranged in the cabinet 3. This washing tank 5 has a tableware inlet 6 on the front.
And a panel 8 made of a corrosion-resistant metal, for example, stainless steel, attached so as to cover an upper inner wall of the resin tank 7.

The resin tank 7 is formed by combining an upper tank 7a having an open front and lower surface and a lower tank 7b having an open upper surface. The panel 8 has a top surface, a back surface hanging down from a rear edge of the top surface, and side surfaces hanging down from both side edges of the top surface. The lower end 8a of the panel 8 is the upper tank 7.
a and the lower tank 7b.
That is, the joint portion is covered with the panel 8 so that water does not easily leak from the joint portion during cleaning. The width of the washing tank 5 is smaller than the depth of the washing tank 5 in accordance with the outer shape of the cabinet 3.
Specifically, the width is about 290 mm and the depth is about 450 m
On the bottom surface of the washing tank 5 having a height of about 460 mm and a height of about 460 mm, a water storage tank 9 is formed by partially deepening the bottom. The water storage tank 9 is formed on the left side at the front of the bottom surface. The water storage tank 9 is connected to a cleaning / draining pump 10 (hereinafter, abbreviated as a cleaning pump). At the upper part of the water storage tank 9, a residue filter 11 for collecting the residue discharged from the tableware is detachably provided. Handle 1 in front of residue filter 11
1a is provided.

On the bottom surface of the washing tank 5, the rear part of the water storage tank 9, that is, the part from the center on the right to the rear is raised higher than the left part.
Is formed. A long nozzle base 13 is arranged in the protruding portion 12 in the longitudinal direction (front-back direction). The nozzle base 13 is hollow to form a flow path, and is connected to the discharge side of the cleaning pump 10.
The cleaning pump 10 is mounted on the outer bottom surface of the cleaning tank 5 and on the back surface of the raised portion 12.

A front nozzle shaft 14 is formed on the upper surface of the tip of the nozzle base 13.
, A front nozzle arm 15 is rotatably supported.
A rear nozzle shaft 16 is formed on the upper surface slightly behind the center of the nozzle base 13, and a rear nozzle arm 17 is rotatably supported on the rear nozzle shaft 16. The front nozzle arm 15 is mainly for cleaning tableware stored in the front side in the cleaning tank 5, and has a plurality of nozzles 15a provided with injection ports on the upper surface. The rear nozzle arm 17 is mainly for cleaning tableware stored on the rear side in the cleaning tank 5, and a plurality of nozzles 17a having injection ports are provided on the upper surface.

When the cleaning pump 10 performs the cleaning operation in this way, the water stored at the bottom of the cleaning tank 5 is sent to the nozzle base 13 by the cleaning pump 10 and passes through the nozzle base 13 to the front nozzle arm. 15 and to the rear nozzle arm 17. Thereby, the nozzle arms 15 and 17 spray water upward while rotating,
The tableware stored in a tableware basket (described later) is filled with water, and the tableware is washed.

When the washing pump 10 performs a draining operation at the time of draining, water at the bottom of the washing tank 5 is discharged to the outside through the drain hose 18. In the case of a table-top dishwasher, the tip of the drain hose 18 is put into the sink 101, so that it is drained into the sink 101.

The tip portion 13 of the nozzle base 13 will now be described.
a is slightly bent toward the center, and the portion 13b where the rear nozzle shaft is formed slightly projects toward the center. Thereby, the center of the front nozzle arm 15 (the front nozzle shaft 14)
The center of the rear nozzle arm 17 (rear nozzle shaft 16) is located at the center in the left-right direction in the cleaning tank 5. Further, the tip portion 13 of the nozzle base 13
a protrudes above the residue filter 11. And, between the residue filter 11 and the nozzle base 13,
A space B for removing the residue filter 11 is opened. More specifically, the nozzle base 1 is
3, the space B is secured.

In the case of the washing tank 5 which is vertically long and narrow in width, the nozzle arms 15 and 17 cannot be too long because they are restricted by the width. For this reason, the front tableware cannot be sufficiently washed unless the front nozzle arm 15 is sufficiently arranged in front. Further, in consideration of the ease with which the residue filter 11 can be attached and detached, the water storage tank 9 must be disposed at the front of the cleaning tank 5. In the above configuration, since the nozzle base 13 is extended above the residue filter 11, that is, the water storage tank 9 after securing the space B for removing the residue filter 11, the front nozzle shaft 14, that is, the front nozzle arm 15 can be sufficiently arranged on the front side, and the dishes on the front side can be sufficiently washed. In addition, the residue filter 11 can be easily attached and detached.

In the raised portion 12, a water supply nozzle 19 is provided to the left of the rear end of the nozzle base 13. The water supply nozzle 19 includes a water supply port 20 formed integrally with the washing tank 5 and a water supply cover 21 that covers the water supply port 20. The water supply nozzle 19 is connected to the water supply hose 2.
2, and water supplied from a water supply hose 22 is supplied from the water supply nozzle 19 into the cleaning tank 5. Thereby, water is stored in the cleaning tank 5.

The right side of the bottom of the washing tank 5 (the position immediately to the right of the nozzle base 13) has a heater 2 extending long in the front-rear direction from the rear to the center and slightly to the front.
3 (seeds heater) is arranged. This heater 23
Warms the water stored in the bottom of the washing tank 5 during washing. Further, at the time of drying, the air blown into the cleaning tank 5 by the blowing device (described later) and the inside of the cleaning tank 5 is heated. The heater 23 has a double loop shape composed of an outer loop 23a and an inner loop 23b in order to increase the heating area, the rear end 23c is bent rightward, and the terminal 23d is located at the rear of the cleaning tank 5. It goes out of the tank from the side wall. In the cleaning tank 5 having a small width, the side wall side has more space than the rear wall side, and the terminal portion 23d is provided on the side wall side having the room, so that the terminal portion 23d obstructs other constituent members. It is hard to be.

An intake chamber 24 is provided behind the heater 23 and near the lower portion of the rear wall of the washing tank 5. An intake port 24 a into the cleaning tank 5 is provided at a lower portion of the front surface of the intake chamber 24. A blower 25 having a blower fan 25a is provided at a position on the right rear side of the outer bottom surface of the washing tank 5 (next to the washing pump). The outside air is taken in by the operation of the blower 25 and is sent to the suction chamber 24, and is sent out as dry air from the suction port 24 a into the cleaning tank 5. Inner top surface 24b of intake chamber 24
Has a spherical shape, and the wind blown into the intake chamber 24 from the bottom upward is smoothly sent to the intake port 24a (see FIG. 7). Further, since the outer top surface 24c is also formed in a spherical shape, water hardly remains on the outer top surface 24c after cleaning.
As described above, since the terminal portion 23d of the heater 23 projects out of the side wall of the cleaning tank 5 out of the tank,
Even if the intake chamber 24 is located behind the heater 23, it does not interfere.

The upper and front sides of the heater 23 are covered with a heater cover 26. The material of the heater cover 26 is a corrosion-resistant metal, for example, stainless steel. The rear end of the heater cover 26 is connected to the intake port 24a. On the upper surface 26a of the heater cover 26, a large number of louvers 27 projecting downward are provided in two rows.
A small round hole 2 is formed in the front surface 26b of the heater cover 26.
8 are open. Conventionally, the upper surface 2 of the heater cover 26
Although many small round holes similar to the front surface 26b are formed in 6a, there is a risk that the tip of chopsticks or the like may enter the heater cover 26 from the round hole and come into contact with the heater 23. Here, by forming the louver 27, it is possible to prevent the tip of the chopsticks from entering.

At the time of drying, the blower 25 and the heater 23
Works. By the operation of the air blower 25, the air blown into the cleaning tank 5 is warmed through the heater 23 and rises, hits the tableware above, deprives the tableware of moisture, and is then provided with an exhaust port provided in the door 2. (Discussed below) to the outside of the machine.

The opening direction of the louver 27 is set to
The direction is the same as the flow direction of the wind from 4a. That is, the opening of the louver 27 does not face the flow direction of the wind. When the opening direction of the louver 27 is oriented in the direction of the flow of the wind, the wind flows along the louver 27, the momentum of the wind increases, and the warm wind does not hit the dishes in the washing tank 5 and the front exhaust is exhausted. It is exhausted from the mouth (described later).
In this regard, since the opening of the louver 27 does not face the direction of the flow of the wind, the above-described phenomenon can be prevented.

At the front side of the washing tank 5, a water level detection chamber 29 is provided outside the right wall surface. The water level detection chamber 29 is connected to the water storage tank 9 via a connection hose (not shown).

As shown in FIG. 15, in the water level detection chamber 29, a normal water level float 81 for detecting a cleaning water level, which is a water level for performing a cleaning operation, and an abnormality set at a position higher than the cleaning water level. An abnormal water level float 82 for detecting the water level is provided. A normal water level detection switch 77 is arranged above the normal water level float 81,
Abnormal water level float 82 is provided with an abnormal water level detection switch 83. The normal water level detection switch 77 and the abnormal water level detection switch 83 are both reed switches.

At the upper end of the normal water level float 81, a magnet 84 is attached. When the normal water level float 81 is at the lowered position, the magnet 84 is close to the normal water level detection switch 77, and the normal water level detection switch 77 is on. Normal water level float 8 with rising water level
When 1 rises, the magnet 84 moves away, and when the washing water level is reached, the normal water level detection switch 77 is turned off. Thereby, the washing water level is detected.

A magnet 85 is attached to the upper end of the abnormal water level float 82. When the abnormal water level float 82 is at the lowered position, the magnet 85 is separated from the abnormal water level detection switch 83 and the abnormal water level detection switch 83
Is in the off state. When the abnormal water level float 82 rises with the rise of the water level, the magnet 85 approaches. When the abnormal water level is reached, the abnormal water level detection switch 83 is turned on. Thereby, the abnormal water level is detected.

In the case of the washing tank 5 having a small width, the side wall side has more room than the rear wall side, and the water level detection chamber 29 is provided on the side wall side having a margin. Is less likely to interfere with other components. Also,
Since the water level detection chamber 29 is provided outside the wall surface far from the water storage tank 9, bubbles generated in the washing tank 5 are unlikely to enter the water level detection chamber 29, and the accuracy of the water level detection is reduced due to the influence of the bubbles. Can be prevented.

The tableware stored in the washing tank 5 is held by a tableware basket 30. This tableware basket 30
Is formed in a cage shape with a plurality of wires. The tableware basket 30 is mainly composed of a lower basket 31 for holding dishes and bowls, and an upper basket 32 (having a shelf shape) which is provided above a rear portion of the lower basket 31 and mainly holds only cups, hot water and the like. Be composed. The tableware basket 30 has a slim shape according to the outer shape of the washing tank 5. That is, the width dimension is considerably smaller than the depth dimension.

In the case of a slim dishwasher having a considerably narrow width relative to the depth as in the dishwasher 1 of the present embodiment, it is preferable to provide the upper basket 32 above the rear part of the lower basket 33. That is, most of the tableware basket 30 is pulled out to the back surface of the door 2 with a part of the rear part left in the cabinet 3, but when the tableware basket 30 is vertically long, the tableware basket 30 can be easily inserted into the rear. Because the amount of withdrawal increases
The dishwasher 1 body easily falls down by the weight of the dish. Here, by disposing the upper basket 32 at the rear part, the center of gravity of the tableware basket 30 in which the tableware is stored can be made later, and the tableware basket 3 in a state in which the tableware is stored.
It is possible to prevent the dishwasher 1 from falling over when 0 is pulled out. Also, even if the upper basket 32 remains in the installed state,
Tableware is easy to put in the lower basket 31.

The lower basket 31 is provided with various holding portions corresponding to the types of tableware. Large plate holder 3 in front center
3 are provided. The platter holding portion 33 is formed by arranging a plurality of pairs of pins 34 whose upper portions are spread out in an inverted C-shape in the front-rear direction. I do. A bowl holding section 35 is provided on the rear right side of the platter holding section 33. The bowl holding portion is formed by arranging a plurality of gates 36 each having a bowl-like shape at the center in the front-rear direction, and standing and holding a bowl between adjacent gates 36. The bowl holding portion 35 normally holds a bowl, but is configured to hold a bowl. Behind the platter holder 33, on the left side, a soup bowl holder 37
Is provided. The soup bowl holding section 37 is formed by arranging a plurality of square gates 38 inclined slightly rearward in the front-rear direction, and stands and holds a soup bowl between adjacent gates 38. A small plate holding portion 39 is formed at the front and side of the large plate holding portion 33, that is, at the front peripheral edge of the lower basket. The small plate holding portion 39 is provided with a gate 40 for holding the small plate with the outer frame of the basket.

A resin stand 41 for accommodating chopsticks, spoons and the like is provided between the large plate holder 33 and the soup bowl holder 37.
Is detachably attached. The left side surface of the stand 41 is close to the left outer frame of the lower basket 31. The outer frame is taller than the stand 41 corresponding to the stand 41 and slightly wider than the depth of the stand 41. Wide gate 4
2 are formed. The gate 4 allows the stand 4
The chopsticks and the like housed in 1 are prevented from falling out of the lower basket 31.

A frame 43 is provided at the rear of the lower cage 31 so as to surround the rear of the upper cage 32. Frame 43
Consists of a right frame 43a, a left frame 43b, and a rear frame 43c.
The upper basket 32 is a front basket 44 constituting a front part of the upper basket 32.
And a rear basket 45 constituting the rear part. Rear basket 45
Is supported by the support member 46 formed from the rear frame 43c in a slightly inclined state so that the rear side is lower in the installed state. Further, it can be pivoted upward from the installed state with the support member 46 as a fulcrum. The front basket 44 is supported by a support portion 47 provided at the front end of the rear basket 45, and in the installed state, similarly to the rear basket 45, the rear side is slightly inclined so as to be lower. Further, it can be rotated upward with the support portion 47 as a fulcrum.

When placing large dishes below the upper basket 32, the upper basket 32 may be an obstacle. In this case, the upper basket 32 can be stored. That is, first, the front cage 44 is rotated and overlapped on the rear cage 45.
Next, the rear cage 45 is rotated in a state where the front cage 44 overlaps, and leans on the rear frame 43c. In this way, after folding the upper basket 32 in two, the upper basket 32 leans against the rear frame 43c and stands upright.

The right end of the upper basket 32 and the right outer frame (right frame 4
3a), a gap C is provided. This gap C allows the upper part of the cutting board to escape when the cutting board is stored in a state where the cutting board is set up on the right end of the lower basket 31.

In the rear basket 45 of the upper basket, cups are arranged in two rows, and four standard cups are arranged in one row. The rear basket 45 can accommodate a total of eight standard cups. The rightmost cup in each row is in a state where a part of the cup protrudes into the gap C, but can be stably supported because the side portion of the cup can be supported by the right frame 43a. When the cutting board is stored in the gap C, the rightmost cup cannot be placed, and the cup that can be stored is 6 cups.
Individual.

On the other hand, since there is no frame 43 on the left and right sides of the front cage 44, frame portions 48 are provided on both side ends of the front cage 44.
Therefore, in the front basket 44, the gap C cannot be used even if the cutting board is not housed. Therefore, four cups cannot be placed like this with the rear basket 45 as it is. Here, the right end of the front cage 44 is extended so as to slightly project toward the front side, and an extension 49 is provided. And
The rightmost cup is shifted slightly ahead of the cup on the left side to accommodate it (see FIG. 4). Thus, four cups can be arranged without using the gap C portion.

In the dishwasher 1 of this embodiment, the door 2
Is opened, the tableware basket 30 can be pulled out to the back side of the door 2. Therefore, rollers 50 are provided at the four corners at the bottom of the lower basket 31. Further, at the lower part of both side walls of the washing tank 5, a rail portion 51 for supporting the tableware basket 30 in the washing tank 5 and rolling the roller 50 is provided. The structure of the door 2 will be described later.

Now, in the lower basket 31, the soup bowl holding section 3
In Table 7, tableware is stored in a relatively dense state. This is because in the soup bowl holding section 37, the soup bowls with a deep bottom are arranged with a small gap. On the other hand, tableware is accommodated in the bowl holding unit 35 in a relatively sparse state. This is because tea bowls having a shallower bottom than the soup bowls are arranged with a certain margin (gap). The bowl holding section 35 has a margin in consideration of accommodating bowls.

Therefore, in the upper basket 32, the water sprayed from the rear nozzle arm 17 sufficiently reaches the cup stored above the bowl holding section 35, that is, on the right side. That is, there is a possibility that water may not sufficiently reach the cup stored on the left side.

In the dishwasher 1 of this embodiment, the upper basket 3
An auxiliary nozzle body 52 is provided at the lower part of the inner surface of the left side wall of the cleaning tank 5 in order to clean the cup accommodated on the left side of 2. The auxiliary nozzle body 52 has a long shape extending in the front-rear direction, and has four nozzles 52a having ejection ports on the front surface.
Is provided. These nozzles 52a spray water toward a cup housed on the left side of the upper basket 32. A connection port 53 is provided at a rear end of the auxiliary nozzle body 52, and one end of a water supply pipe 54 is connected to the connection port 53. This water pipe 54
Is connected to the upper surface of the rear end of the nozzle base 13. The water pipe 54 once extends upward along the inner surface of the rear wall of the washing tank 5 from the connection port with the nozzle base 13, and then extends horizontally to the left. 52 is connected to the connection port 53.

In this manner, the storage condition of the tableware in the lower basket 31 is dense, and the auxiliary nozzle is located in the area (left area) of the upper basket 32 where water from the rear nozzle arm 17 is difficult to reach because it is above this area. Since the water is sprayed by the body 52, the cup disposed in this portion can be sufficiently washed.

Further, since the water pipe 54 is disposed in the washing tank 5, the connection and the seal with the auxiliary nozzle body 52 and the nozzle base 13 are insufficient, so that water leaks from this part. In this case, the gas leaks only into the cleaning tank 5 and does not leak out of the machine. Moreover, the cleaning tank 5
The water pipe 54 is connected to the auxiliary nozzle body 52 on the side wall of the cleaning tank 5 by turning it from the rear wall of the washing tank 5, so that the water pipe 54 does not cross the rail 51, The drawer basket 30 is not hindered by the drawer or storage operation.

The connection position of the water supply pipe 54 with the nozzle base 13 is set near the water supply nozzle, and the water supply pipe 54 and the water supply cover 21 are integrally formed of resin.

The front end of the cabinet 3, that is, the door 2 that covers the tableware opening 6, is supported at the lower end so as to be openable and closable, and opens forward with the lower end as an axis. A handle 55 is provided at the upper center of the front surface of the door 2, and exhaust ports 56 are provided on both sides of the handle 55.

At both end portions on the back surface of the door 2, there are provided roller receivers 57 for receiving the rollers 51 when the tableware basket 30 is pulled out to the back surface of the door 2 when the door is opened. The roller receiver 57 extends in the vertical direction of the door 2. The roller receiver 57 is formed by projecting the rear surface of the end of the door 2 backward from the center.

As shown in FIG. 12, when the tableware basket 30 is completely pulled out, the roller 50 in front of the tableware basket 30 is removed.
Are mounted on a roller receiver 57, and the subsequent roller 50 is mounted on a rail portion 51.

The upper portion of the back surface of the door 2 is provided with an exhaust air passage 59 to the exhaust port 56 by the back surface of the door 2 and the exhaust cover 58.
Is formed. The exhaust air passage 59 is provided between both exhaust ports 5.
6 is formed in a substantially U-shape, and an outlet 60 for the wind from the washing tank 5 is provided on the lower surface at the center. Exhaust gas from the cleaning tank 5 enters the exhaust air passage 59 through the outlet 60, passes through the exhaust air passage 59, and is exhausted from both exhaust ports 56 to the outside.

Here, since high-temperature steam is discharged from the exhaust port 56 during drying, a certain distance must be provided between the exhaust port 56 and the handle 55 from the viewpoint of safety. For this reason, in the case of the dishwasher 1 according to the present embodiment having a small width, the exhaust port 56 is inevitably moved toward the end of the door 2 because the width of the door 2 is small. In this case, as shown in FIG.
8a protrudes into the portion of the roller receiver 57. In the present embodiment, the surface of the exhaust cover 58 is made substantially flush with the surface of the roller receiver, and the end 58
Since a also serves as the roller receiver 57, the tableware basket 30 is not hindered from being pulled out to the back surface of the door 2.

A temperature sensor 61 is arranged on the outer surface of the lower part of the right side wall of the washing tank 5 and behind the water level detecting chamber 29 (see FIG. 5). This temperature sensor 6
Reference numeral 1 denotes a thermistor, for example, for detecting the temperature of water stored at the bottom of the washing tank 5 at the time of washing or rinsing. It is also for detecting the ambient temperature in the cleaning tank 5 during drying.

FIG. 13 is a plan view of an operation panel 62 provided below the door 2 of the dishwasher 1. FIG. The operation panel 62 includes a power switch 63 and a start key 6.
4. A course selection key 65 and a drying course selection key 66 are provided. Further, a plurality of course display lights 67 indicating the cleaning operation course selected by the course selection key 65, a plurality of drying course display lights 68 indicating the drying operation course selected by the drying course selection key 66, the remaining time and the contents of the abnormality are displayed. An indicator 69 for displaying numbers or alphabets and a hot water supply indicator 70 for indicating hot water supply or water supply selection are provided. In FIG. 13, the display 69 is a segment display, but may be another display such as a dot matrix. The start key 64 also serves as a temporary stop key. When the start key 64 is pressed during the driving operation, the operation is temporarily stopped at that time, and when the start key 64 is pressed again from that state, the operation is first stopped. The operation is resumed from the point where it was interrupted.

The washing operation course is a course for performing from washing to drying, and includes “standard”, “speedy”, and “high temperature of 80 ° C.”.
There are five courses, "steam" and "reservation". Here, courses other than “reservation” correspond to the normal course of the present invention. The drying operation course is a course in which only drying is performed. "Drying 60 minutes""Drying 20 minutes"
There are three courses.

The course selection key 65 is used to select a washing operation course and also to set whether the dishwasher 1 is connected to a faucet or a water heater. That is, the user operates the course selection key 65 to select the cleaning operation course,
When the dishwasher 1 is connected to the water heater, the hot water supply is set, and it is determined that the water heater is connected.
Let me know. At this time, the hot water supply indicator 70 lights up.

FIG. 14 is an electrical configuration diagram of the main parts of the dishwasher 1 of the present embodiment. The control unit 71 includes a CPU 72, R
The microcomputer 73 mainly includes a microcomputer including an OM 73, a RAM 74, a timer 75, and the like. The ROM 73 stores a control program for performing an operation described below. The functions described below are achieved by the CPU 72 executing various calculations and processes in accordance with the control program. An operation signal is input to the control unit 71 from the power switch 63, the start key 64, the course selection key 65, the drying course selection key 66, and the like, an open / close detection switch 76 for detecting opening / closing of the door 2, the temperature sensor 6
1. A detection signal is input from the normal water level detection switch 77 and the abnormal water level detection switch 83. In the present embodiment, the temperature sensor 61 detects the temperature in 0.5 ° C. steps. The control unit 71
A predetermined display is displayed on the display 69, and a course indicator 67, a dry course indicator 68, and a hot water indicator 70 are provided.
To control lighting. In addition, the buzzer 78 sounds if necessary. Further, the control unit 71 controls the water supply valve 80, the cleaning pump 10, and the blowing fan 25a via the load driving unit 79.
Control the operation of.

In the dishwasher 1 according to the embodiment of the present invention, when abnormal foaming occurs in the washing tank 5 during the washing operation, the washing operation is stopped and the foaming operation is performed by detecting the abnormal foaming. Hereinafter, this control operation will be described with reference to the flowchart of FIG.

When the start key 64 is pressed to start the operation, the controller 71 opens the water supply valve 80 to supply water to the flush water level. In the cleaning tank 5, a detergent is charged by a user during operation, and water (cleaning water) in which the detergent is dissolved is stored in the cleaning tank 5 by this water supply.

Next, the cleaning pump 10 and the heater 23 are operated, and the front nozzle arm 15
Wash water is sprayed from the rear nozzle arm 17 and the auxiliary nozzle body 52 to wash dishes.

During this washing, the abnormal water level detection switch 83
Thus, whether or not the water level has become abnormal is constantly monitored (step S1). If there is nothing, the washing operation is continued (step S2).

If the user mistakenly uses a general dishwashing detergent, there is a high possibility that abnormal foaming will occur in the washing tank 5 during this washing operation. Then, when abnormal foaming occurs, the abnormal water level float 82 is lifted by the foam, and the abnormal water level detection switch 83 is turned on.

If it is determined in step S1 that the abnormal water level detection switch 83 has been turned on for 0.2 seconds or more,
The control unit 71 stops the cleaning operation and performs an operation for abnormality processing.

First, the counter CT is set to 0 (step S3), and the washing pump 10 is drained for 50 seconds to drain almost all the water in the washing tank 5 (step S4). When the washing water causing the abnormal foaming is discarded in this way, next, a bubble erasing operation is performed to erase the bubbles remaining in the washing tank 5 and discharge the residual detergent to the outside of the machine.

First, a first bubble erasing operation is performed. That is, water is supplied by opening the water supply valve 80, and 15 seconds elapse,
When the normal water level detection switch 77 is turned off, the water supply valve 80 is closed (step S7). Next, the cleaning pump 10 is operated for cleaning (step S8). More specifically, after performing the intermittent operation of the pump 10 times, the pump is continuously operated for 20 seconds. As a result, water is sprayed into the cleaning tank 5 from the front nozzle arm 15 and the like, and bubbles remaining on the inner wall and the like of the cleaning tank 5 are washed away. When the washing operation of the washing pump 10 is completed, the washing pump 10 is drained for 50 seconds (step S9). As a result, the residual detergent is discharged to the outside together with the water in the cleaning tank 5. When this is completed, the count value of the number counter CT is increased by one (step S
10).

The first bubble erasing operation in steps S7 to S9 is performed until it is determined in step S11 that the count value of the number counter CT has exceeded two times, that is, three times in total.

When the first bubble erasing operation is completed, it is determined in step S5 that the counter value of the number counter CT has become 1, and the control unit 71 displays a user error indicating that abnormal foaming has occurred on the display unit. 69 is displayed (step S12). For example, “U3” is displayed. The display "U" indicates an abnormality (user error) caused by an incorrect usage of the user. On the other hand, in the case of an abnormality due to a device failure, an "E" is displayed at the head.

When the first bubble erasing operation is completed, a second bubble erasing operation is performed next. First, the operation is left for 30 minutes while the operation is stopped (step S13). Then, after 30 minutes have elapsed, the control unit 71 sets the water supply valve 80
Is opened to supply water to the washing water level (step S14). Then, similarly to step S8 of the first bubble erasing operation, the cleaning pump 10 is subjected to the cleaning operation to wash the inside of the cleaning tank 5 (step S15). When this is completed, the cleaning pump 10
The drainage operation is performed for seconds, and the water in the cleaning tank 5 is drained (step S16). When the second bubble erasing operation is completed in this way, the control unit 71 ends the operation of the abnormality processing and stops the operation (step S17). However, the display of the user error continues (step S18).

As described above, when abnormal foaming occurs during the cleaning operation, this is detected and the cleaning operation is stopped. Therefore, since foaming stops further, foam leakage to the outside of the machine can be prevented. After the washing operation is stopped, the water in the washing tank 5 containing the general dish detergent is discarded by draining the water. Therefore, since the cleaning water that easily foams is not used in the cleaning operation again, it is possible to prevent the occurrence of the abnormal foaming again when the cleaning operation is performed next time. Further, by performing the first bubble elimination operation and the second bubble elimination operation, the amount of detergent remaining in the cleaning tank 5 can be extremely removed, so that abnormal foaming will occur when the next cleaning operation is performed. It can be further prevented.

Further, since the foaming abnormality is displayed when the first bubble erasing operation is completed, the power may be turned off during the drainage immediately after the user notices, and the drainage may be stopped. Does not wake up. In addition, even if the user who notices the notification turns off the power, at least a certain amount of bubble erasing operation can be ensured. Furthermore, the user can actually confirm the presence of foam.

The condition in which the abnormal water level detection switch 83 is turned on during the washing operation includes the above-described abnormal foaming,
There are the following cases. One is a case where the water supply valve 80 breaks down and the water supply does not stop and the water level in the washing tank 5 reaches the abnormal water level. The other is a case where the abnormal water level detection switch 83 itself breaks down and turns on.

Therefore, the following measures are taken in order to distinguish between such a malfunction of the equipment and a foaming abnormality.

In step S19, after detecting the abnormal water level in step S1, the abnormal water level detection switch 83
Is turned on for more than 0.2 seconds. In step S6, it is detected whether the normal water level detection switch 77 is turned on (whether the water level is lower than the cleaning water level).

When the abnormal water level detection switch 83 itself is broken down and is turned on, the abnormal water level detection water level switch 83 remains on even if draining is performed in step S4. In this case, it is determined in step 19 that the abnormal water level detection switch 83 has been turned on again. Then, the controller 71 determines that the abnormality is not a foaming abnormality but a device failure, and stops the abnormality processing operation, and causes the display 69 to display an abnormality display indicating the device failure. For example, “E3” is displayed.

When a water supply abnormality occurs in which water supply does not stop, if the water supply capacity is high (the amount of leaked water is large), normal drainage cannot be performed even if drainage is performed in step 4. That is, the water level in the washing tank 5 does not drop sufficiently. In this case, since the normal water level detection switch 77 is kept off, this is determined in step 6, and the control unit 71 determines that it is not a foaming abnormality but a device failure abnormality and stops the operation of the abnormality processing. Then, the display 69 displays an abnormal display indicating a failure of the device.

On the other hand, in the case where the water supply capacity is low (water is leaking little by little) even if the water supply is abnormal, the water level in the washing tank 5 once drops considerably due to the drainage in step 4. In step 6, it is not detected.

In this case, an abnormal rise in the water level occurs in the first bubble erasing operation and the second bubble erasing operation.
At this time, the water level may reach the abnormal water level when water is stored in the cleaning tank 5 in step S8 or step S15 and the cleaning operation is performed, or when waiting in step S13. high. In this case, it is determined in step S19 that the abnormal water level detection switch 83 has been turned on again. Then, the control unit 71 determines that the malfunction is not a foaming abnormality but a device failure abnormality, and stops the bubble erasing operation.
An abnormality display indicating a failure of the device is displayed on the display 69.

As described above, the foaming abnormality can be distinguished from the equipment failure abnormality. If it is determined that the foaming abnormality is not an abnormality, the apparatus is notified as the equipment failure abnormality and the bubble erasing operation is not performed (stopped). To Therefore, the processing for the foaming is not continued unnecessarily, and the reliable processing can be performed.

Although the configuration of the dishwasher 1 according to the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, for example, as described below.

The abnormal foaming detecting means may be constituted by, for example, a pair of electrodes and may be provided separately from the abnormal water level detecting switch 83.

As the bubble erasing operation, it is also possible to supply water into the washing tank 5, wash the bottom of the tank particularly containing a large amount of water, and then drain the water. Any operation may be used as long as the operation of actively removing bubbles is performed.

The notification of the abnormal foaming may be made immediately after the first drainage in the processing of the abnormality. Alternatively, it may be performed after the bubble erasing operation is completely completed.

In addition, various changes can be made within the scope of the matters described in the claims.

[Brief description of the drawings]

FIG. 1 is a diagram showing a dishwasher installed on a sink according to an embodiment of the present invention.

FIG. 2 is a side view of the dishwasher.

FIG. 3 is a front view of the dishwasher.

FIG. 4 is a side longitudinal sectional view showing the internal configuration of the dishwasher.

FIG. 5 is a cross-sectional plan view showing the internal configuration of the dishwasher.

FIG. 6 is a front vertical sectional view showing the internal configuration of the dishwasher.

FIG. 7 is a cross-sectional view of a main part showing a configuration of a heater cover, an intake chamber, and a drying device.

FIG. 8 is a plan view of the tableware basket.

FIG. 9 is a side view of the tableware basket.

FIG. 10 is a side view of a main part of the tableware basket showing the state in which the upper basket has been closed.

FIG. 11 is a plan view of a main part of a state where the door is opened, showing a configuration of a back surface of the door.

FIG. 12 is a schematic view of the dishwasher showing a state where the tableware basket is pulled out.

FIG. 13 is a plan view of the operation panel showing a configuration of the operation panel.

FIG. 14 is an electrical configuration diagram of the dishwasher of the present embodiment.

FIG. 15 is a sectional view of a main part showing a detailed configuration of a water level detection chamber.

FIG. 16 is a flowchart showing a control operation of abnormal processing for abnormal foaming.

[Explanation of symbols]

5 Cleaning Tank (Washing Tank) 10 Washing / Draining Pump (Washing Means, Abnormality Handling Means, Bubble Erasing Means) 15 Front Nozzle Arm (Washing Means) 17 Rear Nozzle Arm (Washing Means) 52 Auxiliary Nozzle Body (Washing Means) 69 Display Container (notification means) 71 Control unit (abnormality processing means, bubble erasing means, notification control means) 77 Normal water level detection switch (drainage state detection means) 80 Water supply valve (bubble erasing means) 83 Abnormal water level detection switch (abnormal foaming detection means) , Abnormal water level detection means, abnormal water level rise detection means)

Claims (6)

[Claims] 1. A dishwasher for washing and rinsing tableware by spraying water collected at the bottom of the washing tank onto the tableware by the operation of the washing means, and detecting abnormal foaming in the washing tank. During the cleaning operation, when abnormal foaming is detected by the abnormal foam detection means, the cleaning operation is stopped, and abnormal processing means for draining the water stored in the cleaning tank is provided. And dishwasher. 2. After completion of drainage by the abnormality processing means,
The dishwasher according to claim 1, further comprising a foam removing unit that performs an operation of removing bubbles by supplying water into the washing tank. 3. An informing means for informing an abnormality, and an informing control means for informing the informing means of a foaming abnormality after drainage by the abnormality processing means is completed.
Or the dishwasher according to 2. 4. The dishwasher according to claim 3, wherein the notifying unit notifies the notifying unit of the foaming abnormality at a time point after the start of the defoaming operation by the defoaming unit. 5. An abnormal water level detecting means comprising an abnormal water level detecting means for detecting that a water level in the cleaning tank has become higher than a cleaning water level for performing a cleaning operation, and A drainage state detecting unit for detecting whether or not the water is normally drained from the washing tank by a drainage operation of the processing unit; and even if the drainage operation is performed by the abnormal processing unit, the abnormal water level is detected when the water level is abnormal. Is detected, and / or when the drainage state detection unit detects that the water is not properly drained from the cleaning tank, the notification control unit notifies the notification unit of a device failure abnormality. 5. The dishwasher according to claim 3, wherein said foam removing means does not perform a foam removing operation. 6. An abnormal water level rise detecting means for detecting whether or not an abnormal water level rise has occurred in the washing tank during the foam erasing operation by the foam erasing means. The method according to claim 5, wherein, when it is detected that an excessive water level rise has occurred, the bubble erasing means stops the bubble erasing operation, and the notification control means causes the notification means to notify the device of a failure abnormality. dishwasher.