JPH11290260A - Dishwasher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect closing of a lid and lock by a locking means. SOLUTION: A locking mechanism 30 for locking closing a lid 19 is disposed on the front lid body 21 of the lid 19. In addition, the first detecting device 40 for detecting opening/closing of the lid 19 is disposed on the right side part of a washing tank 6 and this first detecting device 40 is constituted of a reed switch 41 and a magnet 42. In addition, the second detecting device 43 for detecting locking/unlocking of the locking mechanism 30 is disposed on the front side part and this second detecting device 43 is constituted of a reed switch 44 and a magnet 45.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher provided with an open-top washing tank.

[0002]

Recently, in a system kitchen, as shown in FIG.
Is provided in cabinet 102 side by side with sink 103. In the dishwasher 101, the dishes 1 are stored in the washing tank 104 while the user is standing.
05 is open to accommodate the cleaning tank 10.
A lid 106 for opening and closing the upper opening 4 is provided in the upper opening.

Incidentally, it is inconvenient if the lid 106 is inadvertently opened while the lid 106 is closed. Therefore, the present inventor has considered providing a locking means. However, when there is a part of garbage or food at the periphery of the opening of the cleaning tank 104, the lid 106 is locked even if the lid 106 is not completely closed or is not locked by the locking means. There is a risk that the washing operation may be performed by mistake, and water may leak from the gap between the opening of the washing tank 104 and the lid 106.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to prevent a lid from being opened carelessly by a lock means, and to detect closure of the lid and lock by the lock means. It is an object of the present invention to provide a dishwasher capable of preventing the lid from being operated in a partially closed or partially locked state.

[0005]

According to a first aspect of the present invention, there is provided a cleaning tank having an opening on an upper surface, a cleaning mechanism for cleaning dishes in the cleaning tank, and opening and closing the opening of the cleaning tank. Cover, a lock unit for locking the closed state of the cover, a first detection unit for detecting opening / closing of the cover, and a second unit for detecting lock / unlock of the lock unit.
And a detecting means.

In this configuration, since the locking means for locking the closed state of the lid is provided, it is possible to prevent the lid from being opened carelessly. Since the first detecting means for detecting opening / closing of the lid and the second detecting means for detecting locking / unlocking of the locking means are provided, the lid is incompletely closed by a part of dust or food. Or in the case of an incompletely locked state, this can be detected, thereby preventing the lid from being operated in an incompletely closed or incompletely locked state.

[0007] The invention of claim 2 is characterized in that the first detecting means and the second detecting means are formed in a non-contact type. As means for detecting the opening and closing of the lid, as a simple method, for example, an electrode for passing a weak current through the cleaning tank side and the lid side is provided, and when the lid is closed, both electrodes come into contact and conduct. Although a configuration of the system is conceivable, in this configuration, a lead wire for extracting a weak current is required on both the cleaning tank side and the lid side, so that the lid can be completely attached to and detached from the cleaning tank side. This makes it difficult to perform the cleaning. For example, it is difficult to remove and clean the lid to remove dirt and the like on the lid. On the other hand, for example, a detecting means composed of a combination of a reed switch and a magnet, or a hole I
Detection means consisting of a combination of C and a magnet, or
Non-contact type detection means such as a reflection type optical sensor does not require a lead wire on the subject side, that is, the first detection means and the second detection means are configured to be non-contact type as in the above configuration. This eliminates the need to connect the lead wire to the lid, allows the lid to be removably attached, and contributes to the improvement in lid cleaning.

The invention according to claim 3 is characterized in that the opening and the lid have a rectangular shape, and the first detecting means and the second detecting means are provided on different sides of the opening and the lid. Have In a dishwasher, the opening and lid of the washing tank are usually rectangular. Then, temporarily,
If the first detecting means and the second detecting means are provided on the same side, that is, in the vicinity, if there is dust on the side, the lid may be incompletely closed or incompletely locked by the two detecting means. Although it can be detected, if there is dust on the other side, both detection means may detect a normal state. However, in the above configuration, since the first detection means and the second detection means are provided on different sides of the opening and the lid, the range of abnormality detection (detection of incomplete closure of the lid or detection of incomplete lock) is limited. Widely, the abnormality detection reliability is improved.

According to a fourth aspect of the present invention, it is possible to supply power to a load circuit such as a cleaning mechanism by the lock detection operation of the second detection means, and to enable the power supply to the cleaning mechanism by the unlock detection operation of the second detection means. This is characterized in that the supply of power to the load circuit is prohibited. In this configuration, when the lid is closed by the locking means, power can be supplied to the load circuit such as the cleaning mechanism, and the cleaning operation is performed on condition that the lid is securely closed. . Further, since the power supply to the load circuit is prohibited by the unlock detection operation of the second detection means, malfunction of the load circuit can be prevented when the cleaning operation is controlled using the microcomputer.

That is, when the microcomputer is used for operation control, usually, the output signal of the second detecting means is inputted to the microcomputer, and the microcomputer controls the power cutoff to the load circuit based on this input. Things. However, in this case, if an abnormality such as runaway occurs in the microcomputer, the microcomputer
The load circuit may be energized in spite of the fact that the second detection means outputs the unlock detection signal.

However, in the above configuration, the power supply to the load circuit is prohibited by the unlock detection operation itself of the second detection means. Therefore, even when the operation control is performed by the microcomputer, the second detection means is not operated. If the lock detection operation is performed, even if an abnormality occurs in the microcomputer, power supply is prohibited regardless of the abnormality, and the microcomputer becomes safe. In this case, it is preferable to supply power to a load circuit such as a cleaning mechanism on condition that the power switch is operated in addition to the lock detection operation of the second detection means (the invention of claim 5). .

According to a sixth aspect of the present invention, when an operation start command is issued to the cleaning mechanism, the lid detection by the first detection means is performed at least once between the end of the previous operation and the operation start command. It is characterized in that the operation is started when the condition that unlock detection by the second detection means has been performed once or more is satisfied.

When the washing operation is completed, the lid is usually opened to take out the dishes or to check the washing condition. When the lid is not opened, the tableware is not taken out or the cleaning condition is not confirmed, and it is not preferable to start a new cleaning operation. However, in the above configuration, when the operation start command to the cleaning mechanism is issued, the lid detection by the first detection means is performed once or more between the end of the previous operation and the operation start command, and the second Since the operation is started when the condition that the unlock means is detected once or more by the detection means is satisfied, the washing is performed without removing the tableware or checking the washing condition after the previous operation. There is no malfunction such as starting operation.

In this case, when the above condition is not satisfied, the notifying means may perform a notifying operation (the invention of claim 7). By doing so, the user becomes aware that he has forgotten to remove tableware or to check the washing condition after the previous operation.

The invention according to claim 8 is provided with a notifying means, and
When the lid opening is detected by the detecting means and the lock is detected by the second detecting means, the notifying means is caused to perform a notifying operation. In a state in which the lid is completely closed, the lid detection is detected by the first detection means and the lock of the locking means is detected by the second detection means, which is a normal detection operation state.
When the lid is opened from the completely closed state of the lid, the locking means is first unlocked and then the lid is opened. At this time of unlocking, the second detecting means detects the unlocked state and The first detection means is in a blockage detection state, which can also be said to be a normal detection operation state. Further, when the lid is completely opened, the first detecting means detects the opening of the lid, and the second detecting means detects unlocking (unlocking) of the locking means. Is also in a normal detection operation state. However, a detection state in which the first detection means is in the lid open detection state and the second detection means is in the lock detection state is not considered in normal use, and an abnormal use situation has occurred, or these detection means have failed. it is conceivable that.

However, in the above configuration, when the lid detection is detected by the first detecting means and the locking of the locking means is detected by the second detecting means, the notifying means is notified so that an abnormal use situation may occur. Alternatively, it becomes possible to recognize the failure of the detecting means. Thus, quick response is also possible.

According to a ninth aspect of the present invention, a sound output device and a display device are provided as the notification means, the sound output device outputs a notification sound in a predetermined sound output pattern, and the display device displays an image in a predetermined display pattern. When the lid detection is detected by the first detection means and the unlocking is detected by the second detection means, the output operation of the sound output device is stopped, and the display operation of the display device is performed before the display operation. This is characterized in that the display pattern is restored to the display pattern of FIG.

In this configuration, since the notification is made by the sound and the display, the notification can be surely performed. When the lid detection is detected by the first detection means and unlocking is detected by the second detection means, that is, when the lid is completely opened, the output operation of the sound output device is stopped, and Since the display operation of the display device is returned to the display pattern before the display operation, the notification is stopped when the cause of the abnormality is removed. In other words, once the user completely opens the lid, it is expected that the user will notice that he has forgotten to remove the tableware and resolve it, or that he will notice that he has forgotten to check the cleaning condition, and that this will be resolved. Alternatively, it is expected that the abnormal use situation will be resolved, etc., and the notification operation will be stopped after the opportunity to remove such an abnormal cause, which is extremely effective as the notification operation stop timing.

According to a tenth aspect of the present invention, an operation start switch is provided, and when the unlocking is detected by the second detecting means or the lid opening is detected by the first detecting means during the operation, the operation is temporarily stopped. Stop, and then, when the first detecting means detects the lid blockage and the second detecting means detects the lock, the operation is restarted based on the operation of the operation start switch. Has features.

In this configuration, the operation is stopped when the locking means is unlocked or the lid is opened, so that it is safe. In this case, the operation is not stopped but is temporarily stopped. Driving is not wasted. In addition, when the operation is resumed, the lid is detected by the first detection means, the lock is detected by the second detection means, and the operation is resumed by operating the operation start switch. Therefore, the operation is not inadvertently restarted. That is, if the lid is opened during operation, for example, to check the cleaning state, the operation is temporarily stopped, but the lid may be inadvertently closed and locked. In this case, a problem occurs in which the driving is immediately restarted against the intention of the user, but such a problem does not occur in the above configuration.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a dishwasher to be incorporated in a sink cabinet of a system kitchen will be described below with reference to FIGS. First, FIG. 3 shows a sink cabinet 1 of a system kitchen, which includes a stainless steel top plate 2, on which a sink 3 and a drain plate 4 are formed.

The tabletop 2 has a dishwasher 5 according to the present invention.
Is provided. Hereinafter, the dishwasher 5 will be described. The cleaning tank 6 has a rectangular opening on the upper surface, and includes a tank body 7 and an upper frame 8.
The cleaning tank 6 is mounted in a form in which the upper frame 8 is fitted into a rectangular opening 2 a (see FIG. 5) formed in the top plate 2, and is thus disposed in the cabinet 1. Has been established.

On the other hand, the washing tank 6 is provided with a washing mechanism 9. The cleaning mechanism 9 will be described. As shown in FIG. 3, the inside of the cleaning tank 6 is provided with a spray arm 10 and a heater 11 at the bottom, and a dish basket 12 for accommodating tableware can be taken in and out from above. Stored in. Further, a water supply pipe 14 having a water supply valve 13 composed of an electromagnetic valve is connected to the cleaning tank 6. When the water supply valve 13 is opened, tap water is supplied from the water supply pipe 14 to the cleaning tank 6.
The water is supplied until the water level reaches a predetermined level.
The water is heated to a predetermined temperature, for example, 60 ° C. by the heater 11.

Further, a pump device 15 serving both as a cleaning pump and a drainage pump is provided outside the cleaning tank 6, and the pump device 15 has one pump motor 16 (see FIG. 12) as a driving source. The one-way rotation functions as a washing pump, and the other-direction rotation functions as a drainage pump. When the pump motor 16 of the pump device 15 is rotated in one direction (functions as a washing pump), the washing water in the washing tank 6 is sucked from the water tank 17 with a filter provided at the bottom of the washing tank 6. Then, the pressure is fed to the injection arm 10. Also, when the pump motor 16 of the pump device 15 is rotated in the other direction (reverse direction) (functions as a drainage pump), the washing water in the washing tank 6 is sucked from the water storage tank portion 17 and the sink 3 is illustrated. Not to be discharged to the drain pipe.

When the washing water is pressure-fed, the spray arm 10 sprays the washing water toward the dishes in the dish basket 12 and rotates by the reaction of the spray. As a result, the washing water is evenly sprayed on the dishes, and the dishes are washed (washed with a detergent solution and rinsed with fresh water).

A blower 18 is provided outside the cleaning tank 6. The blower 18 sends outside air into the washing tank 6 during the drying process, and the sent air is heated by the heater 11 to be hot-aired, and the hot air is used to dry the washed dishes. . The cleaning mechanism 9 is configured as described above.

The opening on the upper surface of the cleaning tank 6 is opened and closed by a lid 19. The lid 19 includes a rear lid 20 and a front lid 21.
And 21 are rotatably connected by a hinge part 22, so that the lid 19 is configured to be able to be folded in two. The lid 19 is pivotally supported at the rear end of the lid 20 on the cleaning tank 6 side via a hinge 23 (see FIGS. 1, 4, and 6) so as to be vertically movable. 19 is a hinge part 23
It is configured to be removable at some parts.

That is, as shown in FIG. 6, the hinge portion 23 includes a connecting portion 25 rotatably provided on the upper frame 8 of the cleaning tank 6 via the pin 24, and a rear end of the rear lid 20. And a connected portion 26 formed in the portion. The connecting portion 25 has an engaging portion 25a formed therein, and the connected portion 26 has an engaged portion 26 which is detachably engaged with the engaging portion 25a.
a is formed, so that the lid 19 is detachable at the hinge portion 23.

In addition, packings 27 (FIG. 5) for sealing between the lids 20 and 21 of the lid 19 (the lower surfaces in the closed state) are provided to seal the gap between the lid 19 and the opening of the cleaning tank 6. I have. The left and right portions of the front cover 21 are provided with a handle portion 2.
8 and 28 are formed, and, for example, small protrusions 29 for preventing slip are formed.

Then, as shown in FIG. 1 and FIG.
The front cover 21 and the cleaning tank 6 are provided with a lock mechanism 30 as lock means. The lock mechanism 30 will be described. A first lock member 31 is provided at the front of the front lid 21 so as to be movable in the left-right direction. A knob 32 for a user to operate is attached to the first lock member 31. I have. The knob 32 protrudes into a recess 21 a formed at the front edge of the front lid 21. Furthermore, this first
As shown in FIGS. 7 to 9, a locking member 33 is formed on the lock member 31. On the other hand, the upper frame 8 of the cleaning tank 6 corresponding to the first lock member 31
At the front edge, a locking projection 34 is formed as shown in FIG. 4, and the first lock member 31 is moved from the state shown in FIG.
When it moves in the direction, the locking locking portion 33 of the first locking member 31 enters the lower portion of the locking projection 34 and locks it vertically.

The rear portion of the first lock member 31 is rotatably connected to one end of one link 35a of a link mechanism 35 disposed inside the front cover 21. This link mechanism 35 has two links 3 in addition to the link 35a.
5b and 35c are connected to each other.
A second lock member 36 and a third lock member 37 that can move in the left-right direction are connected to the other ends of 5b and 35c. The second lock member 36 and the third lock member 37
Locking recesses 38 and 39 are formed on both side edges of the upper frame 8 that face each other.

In the lock mechanism 30, when the lid 19 closes the cleaning tank 6 and the first lock member 31 is at the position shown in FIGS. 1 and 9, the second lock member 36 is closed. , The third locking member 37 is the front lid 2.
When the first lock member 31 is operated to move in the direction of the arrow A from that state,
As described above, the locking locking portion 33 enters the lower portion of the locking projection 34 and locks the lower portion of the locking projection 34 in the up-down direction, and the link mechanism 35 operates following the second locking portion.
The lock member 36 is moved in the direction of the arrow Aa to be inserted and engaged with the locking recess 38, and at the same time, the third lock member 3
7 is moved in the direction of the arrow Ab to be inserted and engaged in the locking recess 39 (see FIG. 2). Thus, the lid 19 is locked in the closed state.

Now, as shown in FIGS. 1 and 5, the first lock member 37 is located near the front (the front edge of the cleaning tank 6).
A first detection device 40 corresponding to the detection means is provided. That is, the first detection device 40 is configured by a combination of the reed switch 41 and the magnet 42. The reed switch 41 is arranged inside the upper frame 8 of the cleaning tank 6, and the magnet 42 is arranged inside the front cover 21 in a portion near the reed switch 41. The first detection device 40 composed of such a combination of the relay switch 41 and the magnet 42 is a non-contact type.
The reed switch 41 is turned on (contact closed) in the state of FIG. 5, that is, with the lid 19 closing the upper opening of the cleaning tank 6, and the lid 19 is slightly opened as shown in FIG. Then, it is turned off (contact open).

As shown in FIGS. 1, 8 and 9,
A second detection device 43 corresponding to a second detection unit is provided on the first lock member 31 and a portion near the first lock member 31 (right edge of the cleaning tank 6). That is, the first detecting device 40 and the second detecting device 43 are connected to the opening of the cleaning tank 6 and the lid 1.
Nine different sides are provided. This second detection device 43 is configured by a combination of a reed switch 44 and a magnet 45. The reed switch 44 is connected to the cleaning tank 6.
The magnet 45 is disposed on the left side of the first lock member 31. The second detection device 43 including such a combination of the relay switch 44 and the magnet 45 is also a non-contact type.

The reed switch 44 is in the state shown in FIG. 8, that is, the state in which the lock mechanism 30 has locked the closure of the lid 19 (the lock locking portion 33 of the first lock member 31 has the locking projection 3).
4, the second lock member 36 is locked in the locking recess 38, and the third lock member 37 is locked in the locking recess 3.
9) (turned on (contact closed)), and as shown in FIG. 9, turns off (contact opened) when the lock is released (unlocked). .

On the other hand, an operation panel 46 is provided on the front of the cabinet 1 as shown in FIG. 3, and the operation panel 46 has a power-on switch 47 as a power switch and a power supply switch as shown in FIG. A cutoff switch 48, a start switch 49 also serving as a pause switch, a drying time setting switch 50 and a course setting switch 51 are provided, and a power supply display 52, a drying time display 53,
54 and course indicators 55 to 57 are provided. In addition, each of the indicators 52 to 57 includes an LED.

FIG. 12 shows an electrical configuration. One end of the power plug 58 is connected to a bus 58a, and the other end is connected to a bus 58b via a power supply relay switch 59. The load circuit of the cleaning mechanism 9 is connected between the buses 58a and 58b. That is, the bus 58
The heater 11 is connected between the heaters 11a and 58b via a relay switch 60, and the triac 6 is connected to the bus 58a.
1 is connected to the non-inverting terminal of the pump motor 16 of the pump 15 and the inverting terminal of the pump motor 16 is connected to the pump motor 16 via the triac 62. The common terminal of the pump motor 16 is connected to the bus 58b. Have been. Also, a triac 63 is provided between the buses 58a and 58b.
The fan motor 18a of the blower 18 is connected through a. And the water supply valve 13 is connected through a triac 64.

The microcomputer 65 is provided with a switch input corresponding to each switch from a switch input section 66 including the switches 47 to 51. Also, a signal S4 corresponding to the on / off state of the reed switch 41 of the first detection device 40
1 is supplied to the input terminal I1, and a signal S44 corresponding to the on / off state of the reed switch 44 of the second detection device 43 is supplied to the input terminal I2.
In this case, when the signal S41 is at the high level, it indicates that the closure of the lid 19 has been detected, and when it is at the low level, it indicates that the opening of the lid 19 has been detected. The signal S44 is
A high level indicates that lock of the lock mechanism 30 has been detected, and a low level indicates that lock of the lock mechanism 30 has been detected.

The reed switch 44 of the second detector 43 constitutes a part of the relay drive circuit 67 of the power supply relay switch 59. That is, in the relay drive circuit 67, the emitter of the PNP transistor 69 is connected to the drive power supply Vdd via the relay switch 68, and the collector of the transistor 69 is connected to the relay coil 70 for turning on and off the power supply relay switch 59. One end is connected, and the other end of the relay coil 70 is connected to GND.

Further, one end of the reed switch 44 of the second detecting device 43 is connected to the base of the transistor 69, and the control power source Vcc is connected via the resistor 71.
Is connected. The other end of the reed switch 44 is connected to the pull-down resistor 72 and to the input terminal I2 of the microcomputer 65. One end of a relay coil 73 for turning on and off the relay switch 68 is connected to the drive power supply Vdd via the collector and the emitter of the PNP transistor 74, and the other end is connected to GND. The base of the transistor 74 is connected to the output terminal O1 of the microcomputer 65.

The relay switch 60 is turned on / off by a microcomputer 65 via a drive circuit 75, and each of the triacs 61 to 64 is connected to the drive circuit 7
On / off control is performed by the microcomputer 65 via the control unit 6. Further, the microcomputer 65 controls the driving of a display circuit 77 including the above-mentioned respective display devices 52 to 57, and controls the driving of a sound output device such as a buzzer 78 which is one of the notifying means. The power indicator 52 and the course indicators 55 to 57 also correspond to a display device serving as another notification means.

Now, the microcomputer 65
The storage means (ROM) has a program for controlling the overall cleaning operation, and the first detecting device 4
It has a program for performing various controls in relation to the operation of the 0th and second detection devices 43, and will be described below with reference to FIGS. Prior to starting the washing operation, the user opens the door 19 as shown in FIG. 3 and stores the dishes to be washed in the dish basket 12 in the washing tank 6. At this time, a detergent is charged into the cleaning tank 6 in advance. The rear cover 19 is closed, and the lock mechanism 30 locks the closed state of the cover 19. By closing the lid 19,
The reed switch 41 of the first detection device 40 turns on,
The signal S41 given to the microcomputer 65 is set to a high level (coverage detection of the lid 19). Further, due to the lock, the reed switch 44 of the second detection device 43 is turned on, the transistor 69 of the relay drive circuit 67 is turned on, and the signal S44 given to the microcomputer 65 is set to a high level (lock detection). Therefore, in the relay drive circuit 67, when the transistor 74 is turned on, the power supply relay switch 59 is turned on, that is, the reed switch 4 of the second detector 43 is turned on.
By turning on 4 (lock detection operation), power supply to the load circuit is enabled.

The microcomputer 65 includes a plug 58
Starts when is connected to commercial power,
First, in step Q10 of FIG. 13, it is determined whether or not the power-on switch 47 has been turned on. When the switch is turned on, the transistor 74 of the relay drive circuit 67 is turned on.
The relay coil 73 is energized and the relay switch 68 is turned on. As a result, the relay coil 70 is energized, the power supply relay switch 59 is turned on, and power is supplied to the load circuit (each electric device of the load circuit has not been energized yet).

In the next step Q30, a "standard" course is initially set as a course of the cleaning operation, and
At 40, a power indicator 52, a drying time indicator 53 for "20 minutes", and a course indicator 5 for a "standard" course
5 is lit. In step Q50, the first detection device 40
If there is a lid 19 open detection (signal S41 is low level) due to or a non-lock detection (signal S44 is low level) by the second detection device 43, this is stored. As can be seen from steps Q60, Q70 and the closed loop of step Q50, this step Q50 is executed unless the start switch 49 is turned on (that is, from the previous cleaning operation to the start of the current cleaning operation). It is.

In the next step Q60, it is determined whether or not the start switch 49 has been turned on. If not, the flow proceeds to step Q70 to determine whether or not another switch has been turned on. If the switch has not been turned on, the process returns to step Q50. If the switch has been turned on, the process proceeds to step Q80, where the setting and display according to the operated switch are performed, and the process returns to step Q50.

If it is determined in step Q60 that the start switch 49 has been turned on, the process proceeds to step Q60.
90, and based on the storage result in step Q50, the opening of the lid 19 and the unlocking of the lid 19 closing lock once have been performed so far (that is, from the last cleaning operation to the start of the current cleaning operation). It is determined whether or not there has been at least one.
Execute the cleaning operation on the course set this time. For example, if a "standard" course has been set, the "standard" course is controlled as described below in brief.

First, the transistor 64 is turned on, the water supply valve 13 is energized and opened, and water is supplied to the cleaning tank 6 to a predetermined water level.
After this water supply, the relay switch 60 is turned on to turn on the heater 11.
The water is heated to about 60 ° C. to warm the water (water supply / heating step). When the water supply / heating process is completed, the triac 61 is turned on, the pump motor 16 is rotated forward, and the pump device 15 is caused to function as a cleaning pump.
The hot water in the inside is sent to the spray arm 10 under pressure, and the warm water containing the detergent is sprayed as washing water onto the dishes in the dish basket 12 to wash the dishes (washing process). After performing this washing step for a predetermined time, the triac 62 is turned on, the pump motor 16 is reversed, and the pump device 15 functions as a drain pump, thereby draining water in the washing tank 6 (drain step).

After the draining process is completed, the same water supply / heating process as described above is executed again, and the tableware is rinsed by using the pump device 15 as a washing pump (rinsing process). After the washing step, the above-described draining step is performed. Thereafter, the triac 63 is turned on to drive the fan motor 18a of the blower 18 and energize the heater 11, thereby drying the dishes (drying process). Above "standard"
The cleaning operation on the course ends.

When the above-described cleaning operation is executed and completed in step Q100, the process proceeds to step Q110, in which the number of times of opening and unlocking the lid stored in step Q50 is cleared, and the process returns to step Q50.

Here, in the aforementioned step Q90,
If both or one of the number of times of opening the lid and the number of times of unlocking from the end of the previous operation to the present is zero, the process proceeds to step Q120 without moving to step Q100 (without starting the operation). In this step Q120,
The buzzer 78 is driven in a predetermined sound output pattern, for example, a continuous output pattern, and the display devices 52, 55 to 57 are driven in a predetermined display pattern. In this case, the display pattern alternately repeats that only the display 52 is turned on for 0.5 seconds and only three of the displays 55 to 57 are turned on for 0.5 seconds. The driving of the buzzer 78 and the alternate blinking of the indicators 52, 55 to 57 are anomalies.

The purpose of step Q90 is as follows. That is, when the washing operation is completed, the lid 19 is usually opened to take out the dishes or to check the washing condition. When the lid 19 is not opened, the tableware is not taken out or the cleaning condition is not confirmed, and it is not preferable to start a new cleaning operation.

However, in this embodiment, when an operation start command to the cleaning mechanism 9 (in this embodiment, an ON operation command of the start switch 49) is generated, the operation is performed between the end of the previous operation and this operation start command. The operation is started when the condition that the lid 19 is detected at least once by the first detecting device 40 and the unlocking is detected at least once by the second detecting device 43 is satisfied. (The process proceeds to step Q100), there is no problem that the washing operation is started without taking out the tableware or checking the washing condition after the previous operation. When the condition in step Q90 is not satisfied, as shown in step Q120, the buzzer 78 and the indicators 52, 55 to 57 are caused to perform a notification operation (abnormality notification). You will notice that you have forgotten to remove dishes and check the condition of cleaning.

After step Q120, step Q1
Then, it is determined whether or not the lid 19 has been opened by the first detection device 40 and unlocked (unlocked) has been detected by the second detection device 43. Proceeding to Q140, the output operation to the buzzer 78 is stopped, and each of the displays 52 to 57 is stopped.
Is returned to the previous display pattern.

Thereafter, the flow shifts to step Q100. In this case, there is a concern that the operation is performed with the lid 19 opened, but in this embodiment, the second detection device 43 is used.
Since the power supply relay switch 59 is not turned on unless the lock is detected, and the lid 19 is normally closed in the closed state, the lid 19 is closed and the lock mechanism 30 is closed. The operation of step Q100 is executed on condition that the vehicle is locked.

The purpose of step Q140 is as follows.
The fact that the lid 19 has been opened by the first detecting device 40 and the unlocking has been detected by the second detecting device 43 means that the user once completely opens the lid 19 and eliminates forgetting to remove tableware. It can be interpreted that the cleaning was performed or the cleaning condition was confirmed. Therefore, it is extremely effective as a timing for stopping the sound output of the buzzer 78 and returning the display.

Here, during the execution of the operation in step Q100, the control of the flowchart shown in FIG. 14 is executed at a certain time period. That is, in step R10, the first detection device 40 detects that the lid 19 is open (signal S
It is determined whether or not 41 is at the low level. If the lid 19 is in the open detection state, the process proceeds to step R20 to determine whether or not the second detection device 43 is in the unlocked detection state (the signal S44 is at the low level). Judge. If the lid 19 is in the open detection state or the unlock state is in the detection state, step R
The process proceeds to 30 to temporarily stop the running operation.

Then, the flow shifts to step R40, where it is determined whether or not the lid 19 is closed by the first detection device 40 and the lock is detected by the second detection device 43.
If this is determined, the process proceeds to step R50, where it is determined whether or not the start switch 49 has been turned on. If the start switch 50 has been turned on, the process proceeds to step R60.
And restart the operation. Note that the first detection device 40
When there is no detection of the opening of the lid 19 and no unlock detection by the second detection device 43 ("NO" in step R10 and "NO" in step R20), steps R30 to R60 are not executed.

The purpose of such control is as follows. That is, when the lock of the lock mechanism 30 is released or when the lid 1
By stopping the operation when 9 is opened, safety is ensured. In this case, the operation is not stopped but is temporarily stopped, so that the operation up to that point is not wasted. In addition, when the operation is restarted, the first detection device 40 detects the closure of the lid 19, the second detection device 43 detects the lock, and the start switch 49 is operated to restart the operation. As a result, the operation is not inadvertently restarted. That is, when the lid 19 is opened during operation, for example, to check the cleaning state, and the operation is temporarily stopped,
The lid 19 may be inadvertently closed and locked. In this case, there occurs a problem that the driving is immediately restarted against the intention of the user, but there is no such problem in the above embodiment.

FIG. 15 shows different control contents. The control shown in FIG. 15 is repeatedly executed at a certain time period during the execution of the control shown in FIG. I have. That is, in step S10,
It is determined whether or not the second detection device 43 is in the lock detection state (the signal S44 is at a high level). If the lock detection state, the process proceeds to step S20, where the first detection device 40 detects that the lid 19 is open. It is determined whether or not the state (signal S41 is low level).

However, if the second detection device 43 is in the lock detection state ("YES" in step S10) and is in the lid 19 open detection state ("YE" in step S20).
S "), and proceeds to step S30 to drive the buzzer 78 in a predetermined sound output pattern, for example, a continuous output pattern, and to drive the indicators 52, 55 to 57 in a predetermined display pattern (the control in step Q120 described above). Similar).
After step S30, the process proceeds to step S40,
It is determined whether or not the lid 19 has been opened by the first detection device 40 and the unlocked state (unlocked) has been detected by the second detection device 43. When this is determined, the process proceeds to step S50. , The output operation to the buzzer 78 is stopped, and the display state of each of the displays 52 to 57 is returned to the previous display pattern.

The purpose of such control is as follows. That is, in a state where the lid 19 is completely closed, the first detection device 40 detects the closure of the lid 19 and the second detection device 43 detects the lock of the lock mechanism 30. It can be said that it is operating. When the lid 19 is released from the completely closed state of the lid 19, the lock mechanism 30 is first unlocked and then the lid 19 is opened. At this time of unlocking, the second detection device 43 is unlocked. The state is detected and the first detection device 40 is in the blockage detection state, which can also be said to be a normal detection operation state. Furthermore, when the lid 19 is completely opened,
The opening of the lid 19 is detected by the first detection device 40 and the unlocked state of the lock mechanism 30 is detected by the second detection device 43, which can also be said to be a normal detection operation state.

However, the detection state in which the first detection device 40 is in the lid 19 open detection state and the second detection device 43 is in the lock detection state is not considered in normal use, and an abnormal use situation occurs or It is considered that one of the detection devices 40 or 43 has failed.

However, in the above embodiment, when the lid 19 is detected to be open by the first detection device 40 and the lock state of the lock mechanism 30 is detected by the second detection device 43, the buzzer 78 and the display 52 55 to 5
7 is notified, it is possible to recognize occurrence of an abnormal use situation or failure of the first detection device 40 or 43. Thus, quick response is also possible.

According to this embodiment having such a structure, the lid 1
Since the lock mechanism 30 for locking the closed state of the cover 9 is provided, it is possible to prevent the cover 19 from being opened carelessly. And, since the first detection device 40 for detecting the open / closed state of the lid 19 and the second detection device 43 for detecting the lock / unlock of the lock mechanism 30 are provided, a part of the garbage and foods When the lid 19 is incompletely closed or in an incompletely locked state, this can be detected, so that operation of the lid 19 in incompletely closed or incompletely locked state can be prevented.

Further, according to the present embodiment, since the first detection device 40 and the second detection device 43 are configured in a non-contact type, the following effects can be obtained. That is, generally, as means for detecting the open / closed state of the lid, as a simple method, for example, electrodes for passing a weak current are provided on the cleaning tank side and the lid side, and both electrodes come into contact when the lid is closed. An electrode-type configuration that conducts electricity by conduction is possible. However, in this configuration, it is necessary to provide a lead wire for extracting a weak current on both the cleaning tank side and the lid side, and therefore, it is difficult to completely attach / detach the lid to / from the cleaning tank side. It is also difficult to remove and clean the lid to remove dirt and the like on the lid.

On the other hand, in this embodiment, the first detecting device 40 is constituted by a combination of a reed switch 41 and a magnet 42, and the second detecting device 43 is formed by a reed switch 44 and a magnet 45. Composed of a combination and a non-contact type, it is not necessary to connect a lead wire to the lid 19, and the lid 19 can be detachably attached, contributing to improvement of the cleaning property of the lid 19. it can. Note that the non-contact type detection means includes the Hall I
Detection means consisting of a combination of C and a magnet, or
Non-contact type detection means such as a reflection type optical sensor may be used.

Further, according to this embodiment, the power supply to the load circuit of the cleaning mechanism 9 can be supplied by the lock detection operation of the second detection device 43 (the ON operation of the reed switch 44). The cleaning operation is performed on the condition that the blockage is securely closed, and the power supply to the load circuit is prohibited by the unlock detection operation of the second detection device 43.
When the cleaning operation is controlled by using, the malfunction of the load circuit can be prevented.

That is, when the microcomputer 65 is used for operation control, normally, the output signal S44 of the second detecting device 43 is input to the microcomputer 65, and the microcomputer 65 sends the output signal S44 to the load circuit based on the input signal S44. This is to control the power cutoff. But,
In this case, when an abnormality such as a runaway occurs in the microcomputer 65, the microcomputer 65 energizes the load circuit even though the second detection device 43 detects unlock (the signal S44 is at the low level). Sometimes.

However, according to the above embodiment, the reed switch 44 of the second detector 43 is incorporated in the relay drive circuit 67 of the power supply relay switch 59, and
Since the power supply to the load circuit is prohibited by the unlock detection operation itself of the second detection device 43, even if the microcomputer 65 has an abnormality, the load detection is performed by the unlock detection operation of the second detection device 43. Supply of power to the circuit can be prohibited, and the circuit becomes safe.

In this case, the second detecting device 43
9 In addition to detecting the closing, the power switch 47
Since the power is supplied to the load circuit of the cleaning mechanism 9 on the condition that is operated, the second detection device 4
The power is not supplied to the load circuit carelessly by the detection operation 3 alone, and the power can be supplied only after the user operates the power-on switch 47.

Further, according to the above embodiment, the upper frame 8 and the lid 19, which are the openings of the cleaning tank 6, are rectangular, and the first detector 40 and the second detector 43 are connected to the upper frame. 8
And provided on different sides of the lid 19, the following effects can be obtained. That is, both detection devices 40 and 43
Is provided on the same side, that is, in the vicinity, if there is dust on the side, the lid 19 can be detected by the detection devices 40 and 43 as incompletely closed or incompletely locked. If there is dust on the other side, both detection devices 40 and 43 may detect a normal state. However, according to this embodiment, the first
The detection device 40 and the second detection device 43 are provided on different sides of the upper frame 8 and the lid 19, so that the range of abnormality detection (detection of incomplete closure of the lid or detection of incomplete lock) is wide, and the reliability of abnormality detection is improved. improves.

Although the lid 19 is constructed so that it can be folded in two from two members, the lid may be constituted by one member. Further, the sound output pattern of the buzzer 78 as the sound output device may be an intermittent sound instead of a continuous sound, and the display patterns of the displays 52 to 57 as the display devices are not limited to the above-described embodiment.

[0073]

As apparent from the above description, the present invention has the following effects. According to the first aspect of the present invention, since the locking means for locking the closed state of the lid is provided, it is possible to prevent the lid from being opened carelessly, and to detect the open / closed state of the lid. And the second detecting means for detecting the locking / unlocking of the locking means, the lid is incompletely closed or partially locked by a part of dust or food. In such a case, this can be detected, thereby preventing the lid from being operated in an incompletely closed or incompletely locked state.

According to the second aspect of the present invention, since the first detecting means and the second detecting means are formed in a non-contact type, it is not necessary to connect a lead wire to the lid side. It can be detachably attached, which can contribute to improvement of the lid cleaning property. According to the third aspect of the present invention, since the first detection means and the second detection means are provided on different sides of the opening and the lid, the range of abnormality detection (incomplete lid detection or incomplete lock detection) is reduced. Widely, the abnormality detection reliability is improved.

According to the fourth aspect of the present invention, power can be supplied to the load circuit such as the cleaning mechanism by the lock detection operation of the second detection means, and the condition is that the lid is securely closed. A cleaning operation can be performed, and
The power supply to the load circuit is prohibited by the non-lock detection operation of the detection means, so that when the microcomputer is used to control the cleaning operation, even if an abnormality occurs in the microcomputer, the malfunction of the load circuit can be prevented. I can do it.

According to the fifth aspect of the present invention, power is supplied to a load circuit such as a cleaning mechanism on condition that the second detecting means detects lock and the power switch is operated. As a result, the power is not inadvertently turned on in the load circuit only by the detection operation of the second detection means, and the power can be supplied only after the user operates the power switch.

According to the invention of claim 6, when the operation start command to the cleaning mechanism is issued, the lid detection by the first detecting means is performed at least once between the end of the previous operation and this operation start command. Since the operation is started when the condition that there is the unlock detection by the second detection means is once or more is satisfied, the tableware is not taken out or the cleaning condition is not confirmed after the previous operation. There is no problem that the cleaning operation is started with the cleaning operation. In this case, according to the invention of claim 7, when the above condition is not satisfied, the notification means is caused to perform the notification operation, so that the user becomes aware that he has forgotten to remove the tableware or to check the washing condition after the previous operation.

According to the eighth aspect of the present invention, when the lid detection is detected by the first detection means and the lock of the lock means is detected by the second detection means, the notification means is notified to perform an abnormal operation. Or the failure of the detection means can be recognized. Thus, quick response is also possible.

According to the ninth aspect of the present invention, the sound output device and the display device are provided as the notification means, and the notification is made by the sound and the display. Can be achieved. When the lid detection is detected by the first detection means and the unlocking is detected by the second detection means, the output operation of the sound output device is stopped and the display operation of the display device is displayed before the display operation. Since the operation returns to the pattern, the notification operation is stopped after the cause of the abnormality is removed, which is extremely effective as the notification operation stop timing.

According to the tenth aspect of the present invention, when the lock of the locking means is released or when the lid is opened, the operation is stopped. Therefore, it is safe. In this case, the operation is stopped. Instead of being suspended, the driving is not wasted. Moreover,
Regarding the restart of the operation, since the lid blockage is detected by the first detection means and the lock is detected by the second detection means, and the operation is restarted by operating the operation start switch, Driving is not accidentally restarted.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention and is a plan view of a main part partially broken in a lid closed lock state.

FIG. 2 is a plan view of a main part partially broken in an unlocked state.

FIG. 3 is an overall perspective view with a lid open.

FIG. 4 is an exploded perspective view of a main part.

FIG. 5 is a sectional view taken along line AA of FIG. 2;

FIG. 6 is an enlarged exploded perspective view of a pivot portion of the lid.

FIG. 7 is a perspective view of a first lock member of the lid.

FIG. 8 is a longitudinal sectional front view of a first lock member of the lid.

FIG. 9 is a longitudinal sectional front view of a first lock member portion of a lid having different lock operation states.

FIG. 10 is a partial schematic side view showing a state where a lid is opened;

FIG. 11 is a plan view of an operation panel.

FIG. 12 is a diagram showing an electrical configuration.

FIG. 13 is a flowchart showing control contents of the microcomputer.

FIG. 14 is a flowchart showing different control contents.

FIG. 15 is a flowchart showing different control contents.

FIG. 16 is a diagram corresponding to FIG. 3 showing a conventional example.

[Explanation of symbols]

1 is a cabinet, 2 is a top plate, 6 is a washing tank, 7 is a tank body, 8 is an upper frame, 9 is a washing mechanism, 11 is a heater, 13 is a water supply valve, 15 is a pump device, 16 is a pump motor, 18
Is a fan, 18a is a fan motor, 19 is a lid, 20 is a rear lid, 21 is a front lid, 23 is a hinge, 30 is a lock mechanism (lock means), 31 is a first lock member, and 33 is a lock. Locking portion, 34 is a locking projection, 35 is a link mechanism, 3
6 is a second lock member, 37 is a third lock member, 3
8, 39 are locking recesses, 40 is a first detection device (first detection means), 41 is a reed switch, 42 is a magnet, 43 is a second detection device (second detection means), and 43 is a lead. Switch, 45 is a magnet, 47 is a power-on switch (power switch), 49 is a start switch, 52, 55 to 5
Reference numeral 7 denotes a display (notification means, display device), 59 denotes a power supply relay switch, 65 denotes a microcomputer, 67 denotes a relay drive circuit, and 78 denotes a buzzer (notification means, sound output device).

Claims (10)

[Claims] 1. A washing tank having an opening on an upper surface, a washing mechanism for washing dishes in the washing tank, a lid provided to open and close the opening of the washing tank, and a closure of the lid. Lock means for locking the state; first detection means for detecting opening / closing of the lid; and second detection means for detecting locking / unlocking of the locking means. Dishwasher. 2. The dishwasher according to claim 1, wherein the first detection means and the second detection means are configured in a non-contact type. 3. The apparatus according to claim 1, wherein the opening and the lid have a rectangular shape, and the first detecting means and the second detecting means are provided on different sides of the opening and the lid. Dishwasher. 4. A power supply to a load circuit such as a cleaning mechanism can be supplied by a lock detection operation of the second detection means, and a power supply to a load circuit such as the cleaning mechanism can be supplied by a non-lock detection operation of the second detection means. The dishwasher according to claim 1, wherein the supply of the dishwasher is prohibited. 5. A power supply switch, wherein power is supplied to a load circuit such as a cleaning mechanism on condition that the second detection means performs a lock detection operation and the power switch is operated. The dishwasher according to claim 1, wherein: 6. When an operation start command is issued to the cleaning mechanism, the lid detection by the first detection means has been performed one or more times between the end of the previous operation and the operation start command, and the second detection means 2. The dishwasher according to claim 1, wherein the operation is started when a condition that unlocking has been detected one or more times is satisfied. 7. An informing means, wherein when an operation start command to the cleaning mechanism is issued, the lid detection by the first detection means has been performed one or more times between the end of the previous operation and the operation start command. 2. The dishwasher according to claim 1, wherein when the condition that the second detecting means has detected unlocking once or more is not satisfied, the notifying means is caused to perform a notifying operation. 8. A notifying means, wherein when the lid is opened by the first detecting means and the lock is detected by the second detecting means, the notifying means is operated to notify. Item 7. A dishwasher according to item 1. 9. A notifying means comprising a sound output device and a display device, wherein the sound output device outputs a notification sound in a predetermined sound output pattern, and the display device displays in a predetermined display pattern. When the lid is detected by the detecting means and the unlocking is detected by the second detecting means, the output operation of the sound output device is stopped, and the display operation of the display device returns to the display pattern before the display operation. The dishwasher according to claim 8 or 9, wherein the dishwasher is adapted to be used. 10. An operation start switch, wherein the operation is temporarily stopped when unlocking is detected by the second detection means during operation or when the lid is opened by the first detection means. The system according to claim 1, wherein when the first detecting means detects the lid blockage and the second detecting means detects the lock, the operation is restarted based on the operation of the operation start switch. The dishwasher according to 1.