JP2006075640A - Dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dishwasher which does not commit misjudgment of an abnormal water level even when big foaming arises accompanying drawing-out/pushing in action of a washing chamber. <P>SOLUTION: A control section, which performs washing operation, does not perform abnormality detection treating when it senses ON of an abnormal water level sensing switch which operates at the time of an abnormal water level within the washing chamber within fixed time (10 seconds) from sensing of variation of the ON or OFF state of a door switch which operates at the time of drawing-out or pushing in of the washing chamber from a body of equipment and performs the abnormality sensing treatment when it senses ON of the abnormal water level sensing switch after more than fixed time after sensing variation of the ON or OFF state of the door switch. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a dishwasher, and more particularly to a dishwasher suitable for a built-in type.

  In general, a dishwasher for home use introduces tap water into the washing cabinet and stores it at the bottom, and then operates the pump to suck in the stored water and feed it to the nozzle. The tableware stored in the washing cabinet is washed by spraying the water. In this type of conventional dishwasher, a washing cabinet is provided inside the housing, and a door that pivots forward and downward is provided on the front surface of the housing. It has a structure that can be pulled out freely.

In recent years, with the widespread use of system kitchens, built-in type dishwashers to be incorporated into the system kitchen are commercially available. As a dishwasher suitable for a built-in type, the thing described in Unexamined-Japanese-Patent No. 2000-139799 etc. is known. This dishwasher is a so-called drawer-type dishwasher, and a washing cabinet equipped with a tableware for storing tableware is configured to be able to be drawn forward together with a door that also serves as a front plate. When the washing cabinet is pulled out, the upper surface of the washing cabinet is wide open so that dishes can be taken in and out from above. When the washing cabinet is pushed into the cabinet, the upper lid that was waiting in the upper space inside the cabinet Falls and closes the upper surface opening of the cleaning cabinet.
JP 2000-139799 A

  Conventionally, in dishwashers, for example, abnormal water level detection for detecting abnormal water level in the washing cabinet in order to prevent water from overflowing from the washing cabinet when water supply cannot be stopped due to a failure of the water supply valve, etc. Based on the detection result by this switch, it is judged that the water level in the washing cabinet is abnormal, and the abnormality is notified or the drainage pump is operated to forcibly drain water from the washing cabinet. I like to go. However, in the drawer type dishwasher as described above, for example, when the operation is temporarily stopped to add dishes during washing and the washing cabinet is pulled out, the water stored in the washing cabinet is greatly rippled, Although the water level is actually normal, there is a possibility that the abnormal water level detection switch operates and it is determined that the water level is abnormal.

  The present invention has been made to solve such a problem, and the object of the present invention is that even when a large undulation accompanying the drawer / push-in operation of the cleaning cabinet occurs, the water level is abnormal. An object of the present invention is to provide a dishwasher that does not make an erroneous determination.

  The dishwasher according to the present invention, which has been made to solve the above problems, stores water at the bottom of a wash cabinet that can be drawn forward from a housing whose front is open, and sucks the water into the wash cabinet. In the dishwasher for washing dishes stored in the washing cabinet by spraying, the water level detection means for detecting the water level of the water stored in the washing cabinet, and the abnormal water level based on the detection result of the water level detection means Abnormality determining means for determining whether or not, and a recognizing means for recognizing an operation of pulling out or pushing in the washing cabinet from the casing, or an internal operation related to the operation, wherein the abnormality determining means includes the recognition It is characterized by changing the reference when judging the abnormal water level based on the result of recognition by the means or temporarily stopping the judgment.

  According to the dishwasher according to the present invention, in a time when it can be assumed that the ripple of the stored water is large immediately after the drawer or push-in operation of the washing cabinet is performed, the washing cabinet is in a steady state in which the washing cabinet is housed in the housing. Even if the water level is determined to be an abnormal water level, the abnormality determination unit does not immediately determine that the water level is abnormal. If it is not immediately after the operation of drawing out or pushing in the washing cabinet, an abnormality such as promptly recognizing that an abnormal water level has been reached that would result in overflow of the water, giving an abnormality notification, or starting drainage, etc. You can take measures.

  In the dishwasher according to the present invention, the recognition means can be, for example, a switch means that is turned on / off in accordance with a drawer operation and a push-in operation of the washing cabinet. This switch means does not necessarily recognize the drawer operation and push-in operation of the cleaning cabinet. For example, in a configuration in which the upper lid is raised and lowered in conjunction with the drawer operation / push-in operation of the cleaning cabinet, It is also possible to use a means for detecting the position. According to this configuration, it is possible to reliably change the abnormality determination as described above in response to the putting in and out of the cleaning cabinet. Further, the recognition means may recognize an internal operation that occurs as a highly reliable sign for performing the washing / drawing operation of the cleaning cabinet. For example, the operation is temporarily stopped during the cleaning operation. It is also possible to recognize internal operations that occur in response.

  Further, in the dishwasher according to the present invention, the abnormality determination means pauses the determination of the abnormal water level within a predetermined time after receiving the recognition result by the recognition means, and determines the abnormal water level after the predetermined time has elapsed. It can be set as the structure which performs. According to this configuration, the abnormal water level is notified or water is forcibly discharged regardless of the water level in the cleaning chamber for a certain period of time after the cleaning cabinet is pulled out of the casing or pushed into the casing. No measures are taken.

  Therefore, even if a very large undulation occurs in the cleaning cabinet as the cleaning cabinet is pulled out or pushed in, this is not erroneously determined as an abnormal water level.

  In the dishwasher according to the present invention, the water level detection means detects that the water stored in the washing cabinet has reached a predetermined water level, and the abnormality determination means indicates that the detection result by the water level detection means is a predetermined time. It can be set as the structure which judges that it is an abnormal water level when continuing above. During normal washing operation and rinsing operation, the water level moves up and down due to the water injection. Since the influence can be removed, it is possible to accurately determine that the abnormal water level has been reached.

  Further, in the dishwasher according to the present invention, the water level detection means detects that the water stored in the washing cabinet has reached a predetermined water level, and the abnormality determination means has a predetermined detection result by the water level detection means. A configuration may be adopted in which it is determined that the water level is abnormal when it continues for more than a certain period of time, and the length of the predetermined time is set longer than the predetermined time within a predetermined time after receiving the recognition result by the recognition means. In this configuration, even if within a certain period of time after the washing cabinet is pulled out or pushed in, if it is considered to be an abnormal water level for a long time in a steady state, it is an abnormal water level. Judgment is made and abnormality notification and abnormality countermeasures are taken.

  Therefore, for example, even when the cleaning cabinet is pulled out and pushed in for a relatively short time due to mischief or the like, it is possible to recognize that the water level is abnormal, and more reliably that the water overflows from the cleaning cabinet. Can be prevented. Furthermore, even if the water level is normal in such a situation, it can be assumed that the operation of drawing out and pushing in the washing chamber is repeated more and more as the state where the water level reaches the predetermined water level continues for a long time. Therefore, even if the water level is not actually abnormal, it is beneficial to issue a warning to the user by determining that the water level is abnormal and notifying the abnormality.

  According to the dishwasher according to the present invention, although the water level of the stored water in the washing cabinet is normal, the abnormal notification is given due to a large ripple caused by an impact or the like when the washing cabinet is pulled out or pushed in. It is possible to avoid problems such as trapping or unnecessarily starting the draining operation.

  Hereinafter, a dishwasher according to an embodiment of the present invention will be described with reference to the drawings. 1 and 2 are schematic side sectional views showing the overall configuration of the dishwasher according to the present embodiment. FIG. 1 shows a state in which the washing cabinet is housed in the housing, and FIG. 2 shows a state in which the washing cabinet is pulled out from the housing. Show.

  First, based on FIG.1 and FIG.2, schematic structure of this dishwasher is demonstrated. A cleaning cabinet 2 having an upper surface opening 3 is disposed inside the housing 1 whose front surface is open, and a tableware bowl (not shown) for arranging tableware is installed inside the cleaning cabinet 2. The washing cabinet 2 is integrated with a door 4 that also serves as a front plate that closes the front opening of the housing 1, and is substantially horizontally forward along rails 5 that are installed substantially horizontally on the inner side walls of the housing 1. It can be pulled out freely. A rotatable arm 6 having a plurality of nozzles formed on the upper surface is provided at the center of the bottom of the cleaning cabinet 2. A water tank 7 that is recessed one step lower is formed at the bottom of the washing cabinet 2, and a washing and draining pump 8 is disposed substantially horizontally below the bottom of the washing cabinet 2. When operating as a cleaning pump, the water sucked from the water storage tank 7 is sent to the arm 6 and injected into the cleaning chamber 2 from the nozzle. A retractable water supply pipe 9 having a water supply valve (not shown) is connected to the rear surface of the washing cabinet 2. When the water supply valve is opened, water supplied from an external water tap or the like passes through the water supply pipe 9 and the washing cabinet 2. Poured into.

  An upper lid 10 for closing the upper surface opening 3 of the cleaning cabinet 2 is provided above the cleaning cabinet 2 in the housing 1. The upper lid 10 is swingably supported by a pair of left and right parallel links 11 with one end pivotally supported on the inside of the side wall surface of the housing 1 and the other end pivotally supported on the side surface of the upper lid 10. In addition, an urging device 12 that selectively urges the upper lid 10 in both the upper and lower directions according to the position of the upper lid 10 is provided at the rear portion of the upper lid 10. Thereby, in a state where the cleaning cabinet 2 is housed in the housing 1, the upper lid 10 is in close contact with the upper surface of the cleaning cabinet 2 to close the upper surface opening 3 as shown in FIG. In the state of being pulled forward from the top, the upper lid 10 is held in a state of being pushed up while protruding forward as shown in FIG.

  One of the features of the dishwasher is the mounting structure of the washing and draining pump 8 disposed at the bottom of the washing cabinet 2. Next, the mounting structure of the washing and draining pump 8 will be described with reference to FIGS. 3 is a partial sectional side view of the main part showing the detailed configuration near the bottom of the washing cabinet of the dishwasher, FIG. 4 is a bottom view showing the detailed configuration around the washing and draining pump, and FIG. 5 shows the mounting structure of the pump motor. 6 is a cross-sectional view taken along the line BB ′ in FIG. 5, and FIG. 7 is an enlarged view in the vicinity of portion A in FIG.

  As shown in FIG. 1, the washing and drainage pump 8 is composed of a pump casing 80 made of synthetic resin having a washing impeller 80a and a drainage impeller 80b therein, and both the impellers 80a and 80b rotate via a coaxial motor shaft 81a. And a pump motor 81 to be driven. The inside of the pump casing 80 is divided into a cleaning pump chamber and a drainage pump chamber. The cleaning pump chamber is provided with a cleaning impeller 80a inside thereof, and is opened to the outside so that a cleaning suction port 801 and a cleaning discharge port 802 are provided. Have. On the other hand, the drainage pump chamber has a drainage impeller 80b inside, and has a drainage suction port 803 and a drainage discharge port 804 that open to the outside. Although not shown in FIGS. 3 and 4, the drainage suction port 803 is connected to the water storage tank 7 via a hose, and the drainage discharge port 804 is connected to a drainage groove outside the machine via a hose. Has been.

  The pump casing 80 is screwed to a metal motor mounting plate 82 that is bent in an L shape on both sides with screws 84, and the pump motor 81 is also screwed to the motor mounting plate 82 with screws 83. Although not obvious in FIGS. 3 and 4, the screws 83 and 84 are screwed to the motor mounting plate 82 in three places. In this way, the pump casing 80 and the pump motor 81 are not directly fixed, but are firmly fixed via the motor mounting plate 82. The motor mounting plate 82 has mounting holes in the L-shaped bent portions on both sides of the motor mounting plate 82, and is thick with an elastic body such as rubber with respect to the boss 22 projecting vertically downward from the bottom wall 21 of the cleaning cabinet 2. It is screwed with a screw 86 across a substantially cylindrical cushion 87. The cushion 87 prevents the vibration when the pump motor 81 is operated from propagating to the cleaning cabinet 2.

  Further, in order to hold the rear side (the side far from the pump casing 80) of the pump motor 81, as shown in FIG. 5, the lower part is formed in an arc shape in accordance with the outer shape of the pump motor 81. A motor holding band 85 that is bent outward is used. As shown in FIG. 6, the motor holding band 85 has a metal band 851 fitted in a vibration absorbing band 852 having an U-shaped cross section made of an elastic body such as rubber, and thereby, the metal body and the metal on the outer surface of the pump motor 81. This prevents the band 851 from coming into direct contact and generating noise. The motor holding band 85 supports the pump motor 81 and is screwed to the boss 22 with screws 86 at the bent portions at both ends thereof, similarly to the mounting of the motor mounting plate 82. That is, when the screw 86 is screwed in, the pump motor 81 is tightened by the motor holding band 85 and is held thereby.

  Thus, the front side of the pump motor 81 is firmly fixed to the bottom wall 21 of the cleaning cabinet 2 via the motor mounting plate 82, and the rear side is clamped and held by the motor holding band 85.

  The cleaning outlet 802 of the pump casing 80 has a cylindrical shape directed right above, and a flat cylindrical gasket 88 as shown in FIG. 3 and FIG. Is press-fitted into a substantially cylindrical connecting portion 23 that communicates with the arm base portion formed at the bottom. As shown in FIG. 7, the outer peripheral surface and inner peripheral surface of the gasket 88 are formed with an uneven surface to facilitate press-fitting and increase adhesion, and the edge portion is directed toward the inner peripheral side. The fin 881 is bent obliquely. The fin 881 is in an upright state as indicated by the dotted line in FIG. 7 before the cleaning discharge port 802 is press-fitted into the connecting portion 23. Therefore, it closely adheres to the connecting portion 23. Furthermore, when the cleaning / drainage pump 8 performs the cleaning pump operation, when water is pumped through the cleaning discharge port 802 and water pressure is applied, the water is further strongly adhered to the connecting portion 23. Thereby, very high watertightness can be maintained.

  When the cleaning / drainage pump 8 including the pump casing 80, the pump motor 81, and the motor mounting plate 82 is attached to the bottom of the cleaning cabinet 2, the following is performed. First, while the mounting holes of the motor mounting plate 82 into which the cushion 87 is fitted are respectively inserted into the two bosses 22 of the cleaning cabinet 2, the cleaning outlet 802 into which the gasket 88 is fitted is connected to the connecting portion 23 of the cleaning cabinet 2. The washing and draining pump 8 is attached to the bottom wall 21 of the washing cabinet 2 so as to be press-fitted into the washing chamber 2. In order to perform such fitting at three places, it does not work if the cleaning and draining pump 8 is inclined with respect to the bottom wall 21 of the cleaning cabinet 2. In other words, the cleaning and drainage pump 8 approaches the bottom wall 21 of the cleaning cabinet 2 while keeping it substantially parallel to the bottom wall 21 of the cleaning cabinet 2 by mounting that requires three insertions from the same direction. Thereby, it is possible to prevent the fin 881 of the gasket 88 from being rolled up and pressed in the outer peripheral direction, and as a result, the water sealability between the connecting portion 23 and the cleaning discharge port 802 can be improved. As described above, after the cleaning and drainage pump 8 is fitted, two screws 86 are screwed in, and then the motor holding band 85 is screwed with the screws 86.

  By the way, in this dishwasher, not only the attachment structure of the washing and draining pump 8 but also the arrangement thereof is particularly considered. In the present dishwasher, the washing and draining pump 8 is firmly fixed to the washing cabinet 2 as described above. However, the washing and draining pump 8 is washed and washed by the inertia force of the pump motor 81 at the start and stop of the drawer / push-in operation of the washing cabinet 2. There is a possibility that a large force is applied to the location where the drainage pump 8 is attached. In particular, when the screw 86 is loosened due to long-term use, there is a high possibility that a large force is applied to the press-fitted portion between the connecting portion 23 and the cleaning discharge port 802.

  For this reason, in the present dishwasher, as shown in FIG. 4, a straight line C connecting the center of gravity of the pump motor 81 that is a heavy object and the center of the press-fitting location between the connecting portion 23 and the discharge outlet 802 for cleaning. The arrangement of each part is determined so that the angle α formed by the straight line D extending in the front-rear direction of the casing 1, that is, in the direction of drawing out / pushing in the cleaning cabinet 2, is reduced to about 20 ° or less. It has been. Strictly speaking, when the straight line C and the straight line D are not completely parallel, the straight line D can be determined so as to be oblique to the straight line C. Therefore, both straight lines in the plane including the straight lines C and D can be determined. The angle formed by C and D may be α, and α may be about 20 ° or less.

  When the angle α is close to 90 °, a large force in the twisting direction acts on the press-fitting location due to the inertial force of the pump motor 81 during the drawer / push-in operation of the cleaning cabinet 2, and the gasket 88 is likely to be deteriorated. On the other hand, if the angle α is made small as in this dishwasher, the degree of deterioration of the gasket 88 due to the above factors can be suppressed. Moreover, according to such arrangement | positioning, since the heavy article called the pump motor 81 will be arrange | positioned at the back side of the washing | cleaning store | warehouse | chamber 2, in the state which pulled out the washing store | warehouse | chamber 2, big force is applied to the front lower side. Can be avoided.

  The above arrangement also has the following advantages. That is, the extending direction of the motor shaft 81a to which the impellers 80a and 80b are fixed is substantially the same direction (that is, substantially parallel) to the straight line D extending in the drawing / pushing-in direction of the cleaning cabinet 2. Although the pump motor 80 is fixed to the bottom wall 21 of the cleaning chamber 2 by the screw 86 and sandwiches the cushion 87, when the cleaning chamber 2 is opened and closed vigorously, the pump motor 80 is slightly caused by the inertial force and impact caused by the opening and closing. However, the pump motor 80 vibrates. If the direction of vibration is perpendicular to or close to the motor shaft 81a, a large load is applied to the motor shaft 81a, which tends to cause tilting or bending of the motor shaft 81a. In general, the motor shaft 81a is formed with very high linearity and dimensional accuracy, and a frictional noise with a bearing (not shown) that holds the motor shaft 81a or a motor shaft 81a even if it is slightly inclined or bent. Causes frictional noise with a sealing member (not shown) for water sealing. On the other hand, in the structure of this embodiment, even if the pump motor 81 is vibrated, the force component that tilts or bends the motor shaft 81a is very small, and it is possible to avoid such deformation. it can.

  Furthermore, in this dishwasher, the straight line connecting the two screws 86 where the motor mounting plate 82 is screwed to the bottom wall 21 of the washing cabinet 2 is made to be substantially orthogonal to the straight line D. As a result, the inertia force generated by the weight of the pump motor 81 during the pulling-out and pushing-in operations of the cleaning cabinet 2 can be received in an appropriately dispersed manner, so that the cleaning and draining pump 8 can be firmly fixed.

  FIG. 8 is an electrical configuration diagram of the main part of the dishwasher. The control unit 30 is mainly configured by a microcomputer including a CPU, a ROM, a RAM, a timer, and the like, and executes various controls such as a driving operation based on a control program stored in the ROM. The control unit 30 is sounded when an operation unit 32 for a user to give various settings and instructions, a display unit 33 for the user to monitor setting contents and driving conditions, and to alert the user. The buzzer 34 and the door switch 35 that is turned off or on in accordance with the opening / closing operation of the door 4 are both disposed in the water level detection chamber that communicates with the washing cabinet 2 and are moved up and down in accordance with the water level stored in the washing cabinet 2. An abnormal water level detection switch 36 and a normal water level detection switch 37 that are turned on or off by a float that is turned on, a temperature sensor 38 that detects the temperature of water or air in the cleaning cabinet 2, and the like are connected. In addition, a load driving unit 31 is connected to the control unit 30, and the operations of the cleaning pump 8 a, the drain pump 8 b, the blower motor 39, the water supply valve 40, and the heater 41 are controlled via the load driving unit 31. In this dishwasher, as described above, the washing pump 8a and the drainage pump 8b are integrated as the washing / drainage pump 8, and either the washing pump operation or the drainage pump operation is performed according to the rotational drive direction of the pump motor 81. Is selectively executed.

  Another feature of the dishwasher according to the present embodiment is an abnormal water level detection process executed by the control unit 30 based on detection signals from the abnormal water level detection switch 36 and the door switch 35. Next, the abnormal water level detection process will be described with reference to the flowchart of FIG.

  Even when the power switch (not shown) of the dishwasher is not turned on, there may be a problem that water supply cannot be stopped due to a failure of the water supply valve 40 and water leakage occurs. Therefore, this abnormal water level detection process can be performed as long as the power plug of the dishwasher is plugged into a power outlet and commercial AC power is supplied to the machine regardless of whether the power switch is on or off. Always executed repeatedly. Of course, in this state, the drainage pump 8b is also connected to the commercial AC power source, and even if the power switch is turned off, the control unit 30 operates the drainage pump 8b if drainage is necessary as a result of processing as described later. It can be made to.

  First, in the control unit 30, both the built-in abnormal water level detection timer and the door opening / closing detection timer are reset (step S1). These two timers always perform clocking, and start counting from zero again immediately after resetting. Next, it is determined whether or not the abnormal water level detection switch 36 is on (step S2). Here, when it is determined whether or not the abnormal water level detection switch 36 is turned on, processing for eliminating the influence of switch chattering, external noise, and the like is executed. Specifically, for example, when an abnormal water level detection switch 36 is turned on / off for n (for example, 25) times within a predetermined time (for example, 50 milliseconds), and is turned on for m (n> m) times or more. It may be determined that the abnormal water level detection switch 36 is on.

  If it is determined in step S2 that the abnormal water level detection switch 36 is in the off state, the abnormality detection timer is reset (step S3). On the other hand, if it is determined that the abnormal water level detection switch 36 is on, it remains as it is. Proceed to step S4 (that is, without resetting the abnormal water level detection timer). In step S4, it is determined whether or not the door switch 35 has been changed from on to off or from off to on. If there is a change, both the abnormal water level detection timer and the door open / close detection timer are reset (step S5). If there is a change in the on / off state of the door switch 35, it can be determined that the cleaning switch 2 has just been pulled out or pushed in. Thereafter, it is determined whether or not the time of the abnormal water level detection timer has reached 2 seconds (step S6). If the time of the abnormal water level detection timer is less than 2 seconds, the process returns to step S2.

  Since the abnormal water level detection timer is reset in both steps S3 and S5, the time measurement of the abnormal water level detection timer should proceed without being reset halfway only when the process proceeds from step S2 to S4 to S6. If 2 seconds have elapsed while repeating S2, S4, S6, S2, and so on, the process proceeds from step S6 to S7. In step S7, it is determined whether or not the time measured by the door open / close detection timer has passed 5 seconds. When the time counted is 5 seconds or more, the process proceeds to step S9 to execute abnormality notification and abnormality countermeasure processing. As the abnormality notification, the buzzer 34 is sounded or the abnormality notification lamp of the display unit 33 is turned on. As the abnormality countermeasure processing, the drainage pump 8b is operated to start drainage from the washing cabinet 2.

  Since the door open / close detection timer is reset in step S5, the abnormal water level detection timer counts for 2 seconds after the door switch 35 is turned on / off, that is, for 5 seconds immediately after the washing cabinet 2 is pulled out or pushed in. Even if it becomes above, it will not progress to step S9 as it is, but will progress to step S8. That is, this is not because the water level has actually reached the abnormal water level, but because there is a high possibility that the abnormal water level detection switch 36 is in the ON state due to a large undulation associated with the drawing or pushing operation of the cleaning cabinet 2. .

  In step S8, it is determined whether or not the time of the abnormal water level detection timer has passed 10 seconds. If the time has not reached 10 seconds, the process returns to step S2. On the other hand, even if the time measured by the door opening / closing detection timer is less than 5 seconds, if the time measured by the abnormal water level detection timer is 10 seconds or more, it is determined that there is an abnormality and the process proceeds to step S9. This is to prevent the abnormality notification and the countermeasure processing from being stopped when the cleaning chamber 2 is repeatedly pulled out and pushed in for a short time, even though it exceeds the abnormal water level. is there.

  By the abnormality detection process as described above, when the operation is temporarily stopped during the easy-to-wash operation and the washing cabinet 2 is pulled out or pushed in, even if the water stored in the washing cabinet 2 is greatly rippled, Notification and processing corresponding to the abnormal water level will not be executed. Therefore, it is possible to prevent the buzzer 34 from ringing or draining without permission even though it is not actually an abnormal water level. Further, except immediately after the drawer / push-in of the washing cabinet 2, when the water level in the washing cabinet 2 reaches the abnormal water level, the abnormality is promptly notified and the drainage is started. Furthermore, when the drawer / push-in operation of the washing chamber 2 is repeatedly performed in a short time, even if it is immediately after the operation, if there is a high possibility that the water level is abnormal, the abnormality is surely notified and the drainage is performed. Be started. For this reason, it can prevent reliably that water overflows outside a store | warehouse | chamber.

  The above embodiment is merely an example, and it is obvious that changes and modifications can be made as appropriate within the scope of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS Side surface schematic sectional drawing in the state which accommodated the washing | cleaning cabinet in the housing | casing in the dishwasher by one Embodiment of this invention. The side surface schematic sectional drawing in the state which pulled out the washing store from the housing | casing in the dishwasher by this embodiment. Side surface partial sectional drawing of the principal part which shows the detailed structure of the washing | cleaning warehouse bottom vicinity of the dishwasher by this embodiment. The bottom view which shows the detailed structure of the washing | cleaning and drainage pump periphery of the dishwasher by this embodiment. The schematic exploded view which shows the attachment method of the pump motor of the dishwasher by this embodiment. FIG. 6 is a cross-sectional view taken along line B-B ′ in FIG. 5. The enlarged view of the A section in FIG. The electric system block diagram of the principal part of the dishwasher by this embodiment. The flowchart of the abnormal water level detection process in the dishwasher by this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Housing 2 ... Cleaning cabinet 21 ... Bottom wall 22 ... Boss 23 ... Connecting part 3 ... Upper surface opening 4 ... Door 6 ... Arm 7 ... Water tank 8 ... Cleaning and drainage pump 80 ... Pump casing 801 ... Cleaning inlet 802 Cleaning outlet 81 Pump motor 81a Motor shaft 82 Motor mounting plate 83, 84, 86 Screw 85 Motor holding band 87 Cushion 88 Gasket 881 Fin 10 Upper lid 30 Control unit 31 Load drive Unit 33 ... Display unit 34 ... Buzzer 35 ... Door switch 36 ... Abnormal water level detection switch

Claims (5)

A dishwasher for cleaning dishes stored in the washing cabinet by storing water in the bottom of the washing cabinet that can be drawn forward from the case with the front open, and sucking the water and spraying it into the washing cabinet In
Water level detection means for detecting the water level stored in the washing cabinet;
An abnormality determining means for determining whether or not the water level is abnormal based on a detection result of the water level detecting means;
Recognizing means for recognizing the operation of pulling out or pushing in the washing cabinet from the housing, or the internal operation related to the operation;
The dishwasher is characterized in that the abnormality determination means changes a reference for determining an abnormal water level in response to a recognition result by the recognition means or temporarily stops the determination.   2. The dishwasher according to claim 1, wherein the recognition means is a switch means that is turned on / off in accordance with a drawer operation and a push-in operation of the washing cabinet.   2. The abnormality determination unit suspends determination of an abnormal water level within a predetermined time after receiving a recognition result by the recognition unit, and determines the abnormal water level after the predetermined time has elapsed. Or the dishwasher of 2.   The water level detection means detects that the water stored in the washing chamber has reached a predetermined water level, and the abnormality determination means determines that the water level is abnormal when the detection result by the water level detection means continues for a predetermined time or more. The dishwasher according to any one of claims 1 to 3, wherein:   The water level detection means detects that the water stored in the washing chamber has reached a predetermined water level, and the abnormality determination means determines that the water level is abnormal when the detection result by the water level detection means continues for a predetermined time or more. The dishwasher according to claim 1 or 2, wherein the predetermined time is set longer than the predetermined time within a predetermined time after receiving the recognition result by the recognition means.