JP5765973B2 - Dishwasher - Google Patents

Description

  The present invention relates to a dishwasher that collects washing water for washing dishes and rinsing water for rinsing dishes and reuses them as washing water.

  2. Description of the Related Art Conventionally, there has been known a dishwasher that collects washing water for washing dishes and rinsing water for rinsing dishes in a washing tank and reuses them as washing water. In such a dishwasher, dirt is accumulated in the washing water in the washing tank by repeating the operation.

  In the dishwasher described in JP 2010-17311 A, when the washing water in the washing tank is very dirty, the washing water in the washing tank can be replaced more by supplying more rinsing water than usual. , The dirt of the washing water in the washing tank is suppressed.

JP 2010-17311 A

  However, in the conventional dishwashing machine described above, since the washing water is not completely replaced, there is a remaining dirt, which does not lead to thorough hygiene management. Furthermore, there is a possibility that the cleaning ability may be lowered due to clogging of the cleaning nozzle and the piping due to the remaining dirt.

  Also, in some areas, the government has instructed the exchange of cleaning water regularly, and if a problem occurs, it will be subject to severe punishment, so it is necessary to maintain hygiene under the responsibility of the user. However, such hygiene management is a burden on the user.

  Then, an object of this invention is to provide the dishwasher which can maintain the cleaning capability while supporting the hygiene management by a user.

In order to solve the above-mentioned problems, the present invention performs a washing operation including a washing process for washing dishes with washing water in a washing tank and a rinsing process for rinsing dishes with rinsing water in a hot water storage tank, and is used in the washing process. Washing water and rinsing water used in the rinsing process are collected in the washing tank and reused for washing water, and an alert is output to inform the user when the washing water in the washing tank is replaced , After the alert output starts, it is determined whether or not the cleaning water in the cleaning tank has been replaced based on the detection result of the water level detection means that detects the water level in the cleaning tank, and the water level is detected by the water level in the cleaning tank dropping. When the means is switched to OFF, it is determined that drainage for replacement of cleaning water is detected, and the alert is canceled .

  According to the dishwasher according to the present invention, by outputting an alert notifying the user of the replacement timing of the cleaning water, the user can perform the replacement before the cleaning water becomes too dirty. Can support management. Moreover, according to this dishwasher, the user who notices the alert before the washing water becomes too dirty can be replaced, so that clogging of the washing nozzle due to accumulation of dirt is suppressed. The cleaning performance of the machine can be maintained. Therefore, according to this dishwasher, the hygiene management by the user can be supported and the cleaning ability can be maintained.

In the dishwasher according to the present invention, it is preferable to output an alert according to the accumulated operation time obtained by integrating the operation time.
According to the dishwasher according to the present invention, since the alert is output according to the actual operation time, waste that drains the cleaning water with less dirt as compared with the case where the alert is simply output at regular intervals. It is possible to prevent the cleaning water from becoming too dirty during busy periods. Therefore, according to this dishwasher, since the user can be notified of the replacement timing according to the actual degree of dirt, it is possible to support sanitary management without waste.

In the dishwasher which concerns on this invention, it is preferable to output an alert according to the frequency | count of a driving | operation of washing | cleaning operation.
According to the dishwasher according to the present invention, an alert is output according to the actual number of operations. Therefore, compared to a case where an alert is simply output at regular intervals, waste such as draining washing water with less dirt is wasted. It is possible to prevent the cleaning water from becoming too dirty during busy periods. Therefore, according to this dishwasher, since the user can be notified of the replacement timing according to the actual degree of dirt, it is possible to support sanitary management without waste.

In the dishwasher according to the present invention, it is preferable to stop operation until it is determined that the washing water has been replaced after the alert is output.
According to the dishwasher according to the present invention, it is possible to prevent the user from forgetting to replace the wash water by setting the operation stop state until it is determined that the wash water has been replaced after the output of the alert. So, hygiene management can be thorough.

  According to the present invention, it is possible to support hygiene management by a user and maintain cleaning ability.

It is sectional drawing which shows the dishwasher which concerns on 1st Embodiment. It is a front view which shows the operation panel of FIG. It is a flowchart which shows the alert operation | movement of the dishwasher which concerns on 1st Embodiment. It is a flowchart which shows the alert operation | movement of the dishwasher which concerns on 2nd Embodiment. It is sectional drawing which shows the dishwasher which concerns on 3rd Embodiment. It is a flowchart which shows the alert operation | movement of the dishwasher which concerns on 3rd Embodiment. It is sectional drawing which shows the dishwasher which concerns on 4th Embodiment. It is a front view which shows the operation panel of FIG. It is a flowchart which shows the alert operation | movement of the dishwasher which concerns on 4th Embodiment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
A dishwasher 1 shown in FIG. 1 is a so-called door-type dishwasher. This dishwasher 1 has a main body case 2 made of stainless steel. The inside of the main body case 2 functions as a cleaning room R for storing the tableware D and cleaning the tableware. On the left side of the main body case 2 is provided an operation panel 3 for a user to input operation modes and settings (see FIG. 2).

  The main body case 2 is provided with a door 4 for taking in and out the tableware D in the cleaning room R. A rack rail (not shown) is provided in the cleaning chamber R, and a tableware rack (not shown) on which tableware D is arranged is placed on the rack rail.

  In the upper part of the cleaning chamber R, an upper cleaning nozzle 5 consisting of three arms extending radially and an upper rinsing nozzle 6 consisting of two arms are rotatably arranged. Similarly, in the lower part of the cleaning chamber R, a lower cleaning nozzle 7 composed of three arms extending radially and a lower rinse nozzle 8 composed of two arms are rotatably arranged. Thereby, since the washing water is jetted from the upper and lower sides by the washing nozzles 5 and 7 in the washing process and the rinsing water is jetted from the upper and lower sides by the rinsing nozzles 6 and 8 in the rinsing process on the tableware D arranged in the tableware rack. Washing and rinsing of the tableware D is performed efficiently.

  A cleaning tank 9 for storing cleaning water is formed below the cleaning chamber R configured as described above. The cleaning tank 9 is provided with a water level detection switch (water level detection means) 10 for detecting the level of the cleaning water. The water level detection switch 10 is a switch that is turned on when the water level in the cleaning tank 9 exceeds the predetermined water level H and turned off when the water level is below the predetermined water level H. The water level detection switch 10 is attached substantially below the overflow water level of the cleaning tank 9. This is because the water level detection switch 10 detects a safe water level at which air is not sucked when the cleaning pump 14 is driven. If air is sucked in while the cleaning pump 14 is driven, so-called air biting occurs and cleaning water cannot be jetted from the cleaning nozzles 5 and 7. When the water level detection switch 10 is turned off during operation, the operation of the dishwasher 1 is stopped and air suction by the cleaning pump 14 is prevented.

  The cleaning tank 9 is provided with an overflow pipe 11 extending in the vertical direction. The upper end of the overflow pipe 11 is positioned in the cleaning chamber R slightly beyond the upper edge of the cleaning tank 9, and the lower end protrudes outward from the bottom surface 9 a of the cleaning tank 9. Excess cleaning water in the cleaning tank 9 flows into the pipe through the inflow hole at the upper end of the overflow pipe 11 and is discharged to the outside. The overflow pipe 11 is configured to be removable from the cleaning tank 9. When the user removes the overflow pipe 11, the drain port into which the overflow pipe 11 has been inserted is exposed to the bottom surface 9a of the cleaning tank 9, and the cleaning water in the cleaning tank 9 can be completely drained.

  A cleaning pump 14 is connected to a side surface of the cleaning tank 9 via a cleaning water suction pipe 13. A pump filter 12 is provided at a portion of the cleaning tank 9 to which the cleaning water suction pipe 13 is attached. A cleaning water discharge pipe 15 is connected to the discharge port of the cleaning pump 14, and the cleaning water discharge pipe 15 branches into a first cleaning water discharge pipe 16 and a second cleaning water discharge pipe 17, and the first The cleaning water discharge pipe 16 is connected to the upper cleaning nozzle 5, and the second cleaning water discharge pipe 17 is connected to the lower cleaning nozzle 7.

  Moreover, the dishwasher 1 has the hot water storage tank 18 in which rinsing water is stored. Rinsing water is supplied to the hot water storage tank 18 from an external water heater (not shown) through a hot water supply pipe 21. The hot water supply pipe 21 is provided with a strainer 19 and a water valve 20. In the hot water storage tank 18, a rinsing water heater 22 for maintaining the rinsing water, which is hot water, at a predetermined temperature, and a water temperature sensor 23 for detecting the temperature of the rinsing water are installed.

  A rinsing pump 25 is connected to the hot water storage tank 18 via a rinsing water suction pipe 24. A rinsing water discharge pipe 26 is connected to the discharge port of the rinsing pump 25. The rinsing water discharge pipe 26 branches into a first rinsing water discharge pipe 27 and a second rinsing water discharge pipe 28, and the first rinsing water discharge pipe 27 is connected to the upper rinsing nozzle 6, and The rinsing water discharge pipe 28 is connected to the lower rinsing nozzle 8.

  The dishwasher 1 is provided with an electrical box 31 having a built-in microcomputer (hereinafter referred to as “microcomputer”) 30 for controlling the overall operation. The microcomputer 30 has a function as an integration timer that counts the integrated operation time obtained by integrating the operation time. The operation time in this embodiment is the time during which the cleaning pump 14 is driven. The microcomputer 30 integrates the time during which the cleaning pump 14 is driven without clearing the integration timer even when the operation is stopped or the power is turned off.

  The dishwasher 1 is provided with an external detergent supply pump 32. The detergent supply pump 32 is a bellows pump for supplying the detergent stored in the detergent tank 33 to the cleaning chamber R. The detergent supply pump 32 is connected to a detergent discharge pipe 34 connected to the side wall of the cleaning chamber R, and is connected to the microcomputer 30 by a signal line. The detergent supply pump 32 operates in accordance with a signal output from the microcomputer 30, sucks the detergent in the detergent tank 33 from the connected detergent suction pipe 35, and discharges a predetermined amount of detergent to the detergent discharge pipe 34. The detergent is provided at the tip of the detergent discharge pipe 34 and is discharged into the cleaning room R from a detergent discharge port 36 that connects the cleaning room R and the detergent discharge pipe 34. The detergent discharged into the cleaning chamber R flows into the cleaning tank 9 below the cleaning chamber R and is mixed with cleaning water.

  Further, an external rinse agent supply pump 37 is attached to the dishwasher 1. The rinse agent supply pump 37 is for supplying the rinse agent stored in the rinse agent tank 38 to the rinse water channel. The rinse agent supply pump 37 is connected to a rinse agent discharge pipe 39 that communicates with the rinse water discharge pipe 27, and is connected to the microcomputer 30 through a signal line. The rinse agent supply pump 37 operates in response to a signal output from the microcomputer 30, sucks the detergent in the rinse agent tank 38 from the connected rinse agent suction pipe 40, and discharges the rinse agent to the rinse agent discharge pipe 39. . The rinse agent is discharged from the rinse agent discharge pipe 39 to the rinse water passage in the rinse water discharge pipe 26 by the rinse agent supply pump 37, and is mixed into the rinse water.

  In the dishwasher 1, the user operates the operation panel 3 shown in FIG. 2 to start and stop the operation and make various settings. As shown in FIG. 2, the operation panel 3 switches a setting switch 41 for the user to set the number of times of operation, a display unit 42 for displaying hot water temperature information and other information for washing water and rinsing water, and a driving course. A course changeover switch 43 for stopping operation, a stop switch 44 for stopping operation, an operation switch 45 for switching power ON / OFF, and various display lamps 46 for informing the user of the operation state of the dishwasher 1 are provided. ing. The dishwasher 1 performs self-cleaning by holding down the pause switch 44 for a long time. The operation panel 3 also has a sound output function for outputting a warning sound and a sound announcement.

  In the dishwasher 1, a cleaning cycle operation is performed in which the cleaning process and the rinsing process of the tableware are one cycle. In the washing cycle operation, a washing process for washing dishes with washing water including a detergent is first performed, and then a rinsing process for rinsing dishes with clean rinsing water is performed.

  When the cleaning cycle operation is started, a cleaning start signal is sent from the microcomputer 30 and the cleaning pump 14 is started. As a result, the cleaning water stored in the cleaning tank 9 is pumped to the upper and lower cleaning nozzles 5, 7 via the first and second cleaning water discharge pipes 16, 17. It is sprayed toward the tableware D. At this time, since the cleaning nozzles 5 and 7 continue to rotate due to the reaction force of the injection force, the cleaning water is uniformly applied to the tableware D, and the stains on the tableware D are efficiently washed off.

  The washing water sprayed on the tableware D flows below the washing chamber R and is collected in the washing tank 9. Then, the cleaning pump 14 circulates and supplies the cleaning chamber R again. During this cleaning process, the detergent supply pump 32 is driven, the detergent in the detergent tank 33 is discharged from the detergent discharge port 36 into the cleaning chamber R, and is mixed with the sprayed cleaning water and supplied to the cleaning tank 9. .

  When such a cleaning process is performed for a predetermined time, a cleaning end signal is transmitted from the microcomputer 30 and the cleaning pump 14 is stopped. A rinsing start signal is transmitted from the microcomputer 30 and the rinsing pump 25 is started. As a result, the rinsing water stored in the hot water storage tank 18 is pumped to the upper and lower rinsing nozzles 6, 8 via the first and second rinsing water discharge pipes 27, 28. It is sprayed toward the tableware D. At this time, since each of the rinsing nozzles 6 and 8 continues to rotate due to the reaction force of the injection force, the rinsing water is uniformly applied to the tableware D, and the tableware D is rinsed efficiently. In the rinsing process, the rinse agent is supplied by the rinse agent supply pump 37.

  The rinsing water sprayed on the tableware D is collected in the washing tank 9 and mixed with the washing water and used as washing water in the next washing step. Excess cleaning water in the cleaning tank 9 is discharged from the overflow pipe 11 to the outside. When such a rinsing process is performed for a predetermined time, a rinsing end signal is sent from the microcomputer 30, the rinsing pump 25 is stopped, and one cycle of the washing cycle operation in the dishwasher 1 is completed. This one-cycle operation is counted as one operation.

  In the dishwasher 1, when one cycle of the operation is completed, the next tableware to be cleaned is set and one cycle of the operation is performed again. Thus, in the dishwasher 1, the washing cycle operation is performed intermittently until the main power is turned off.

  Next, the alert operation in which the dishwasher 1 informs the user of the replacement timing of the cleaning water in the cleaning tank 9 will be described.

  The dishwasher 1 performs an alert operation according to the accumulated operation time counted by the microcomputer 30 that functions as an accumulation timer. The dishwasher 1 notifies the user of the timing at which the accumulated operation time has reached the preset accumulated time set in advance by the user as the replacement timing.

  As shown in FIG. 3, in the dishwasher 1, first, when the remaining time until the accumulated operation time reaches the set accumulated time is equal to or shorter than the predetermined time, the remaining time is announced (S1). The timing for making the announcement can be set in advance by the user. Announcement is performed by displaying the remaining time on the display unit 42 of the operation panel 3 and outputting sound. As an audio output, an audio announcement and warning sound for the remaining time are output. The announcement of the remaining time is not essential, and step S1 may be omitted.

  Next, the dishwasher 1 recognizes that the accumulated operation time has passed the set accumulated time (S2). When the dishwasher 1 recognizes that the set accumulated time has elapsed, the dishwasher 1 proceeds to step S3. When the dishwasher 1 recognizes that the set integration time has elapsed during the cleaning cycle operation, the tableware washing machine 1 proceeds to step 3 after the cleaning cycle operation in which the integration operation time has passed the set integration time is completed.

  In step S3, the dishwasher 1 starts outputting an alert that informs the user of the replacement timing of the washing water. The alert is output by image output and sound output on the display unit 42 of the operation panel 3. Specifically, the character “Ch”, which is an abbreviation of “Change”, is displayed on the display unit 42 in a blinking manner. Also, voice announcements and warning sounds are output at predetermined intervals. The alert output continues until it is canceled in step S5.

  The user can also select a mode in which the alert output is stopped when a predetermined time has elapsed from the start of the alert output without shifting to step S5. Further, the alert output may be only the image output on the display unit 42 or only the sound.

  In step S3, the operation stop state of the dishwasher 1 is locked. When the dishwasher 1 is in operation, it is locked after being switched to the operation stop state. The lock in the operation stop state continues until it is released in step S8. The user can switch between a mode in which the operation stop state is locked after the alert is output and a mode in which the operation can be performed after the alert is output.

  Next, in step S4, it is determined whether or not the drainage of the cleaning water in the cleaning tank 9 has been detected. This step S4 is repeated until the drainage of the washing water in the washing tank 9 is detected. During this time, the operation stop state lock and the alert output are continued. Note that the alert may have a specification that increases the alert to the user over time, such as gradually increasing the volume or adding a voice announcement.

  The detection of the drainage of the washing water in step S4 is performed by the water level detection switch 10. The tableware washing machine 1 determines that the drainage of the washing water in the washing tank 9 has been detected when the washing water level in the washing tank 9 decreases and the water level detection switch 10 is switched to OFF. That is, the dishwasher 1 repeats step S4 until the user pulls out the overflow pipe 11 from the washing tank 9 and drains the washing water.

  When it is determined that the washing water in the washing tank 9 is detected, the dishwasher 1 cancels the alert (S5). Moreover, the dishwasher 1 clears the integration timer in the microcomputer 30.

  Subsequently, after the user attaches the overflow pipe 11 and closes the door 4 to turn on the power, the dishwasher 1 starts water supply to the washing tank 9 (S6). The dishwasher 1 drives the rinse pump 25 to rinse the hot water in the hot water storage tank 18 from the nozzles 6 and 8 into the washing chamber R, and the injected hot water enters the washing tank 9 below the washing chamber R. Supply water by flowing in.

  Thereafter, the dishwasher 1 detects the completion of water supply by switching the water level detection switch 10 to ON (S7). When the dishwasher 1 detects the completion of water supply, it determines with the wash water in the washing tank 9 having been replaced. The water level detection switch 10 is a switch for detecting that cleaning water is stored in the cleaning tank 9 up to a safe water level at which the cleaning pump 14 does not suck in air, and is attached below the overflow water level. ing. For this reason, in step S7, even after the water level detection switch 10 is switched to ON, the cleaning pump 14 is continuously operated for a predetermined time, and the water level in the cleaning tank 9 is increased to the vicinity of the overflow water level.

  When it is determined that the washing water in the washing tank 9 has been replaced, the dishwasher 1 confirms that the operation is possible and unlocks the operation stop state (S8). In step S <b> 8, the dishwasher 1 starts counting the integration timer by the microcomputer 30. Thereafter, the dishwasher 1 repeats the operation from step S1 again according to the accumulated operation time.

  According to the dishwasher 1 described above, by outputting an alert notifying the user of the replacement timing of the cleaning water, the user can perform the replacement before the cleaning water becomes too dirty. Can support management. Moreover, according to the dishwasher 1, the user who has noticed the alert before the washing water becomes too dirty can be replaced to prevent clogging of the washing nozzles 5 and 7 due to accumulation of dirt. Therefore, the cleaning performance of the dishwasher 1 can be maintained. Therefore, according to this dishwasher 1, while maintaining the hygiene management by a user, a cleaning capability can be maintained.

  Moreover, according to this dishwasher 1, since an alert is output according to an actual driving time, it is unnecessary to drain cleaning water with less dirt compared to a case where an alert is simply output at regular intervals. It is possible to prevent the cleaning water from becoming too dirty during busy periods. Therefore, according to this dishwasher 1, since the user can be notified of the replacement timing according to the actual degree of dirt, it is possible to support sanitary management without waste. Also, compared to the case where alerts are output based on the number of operations, the difference in the degree of contamination due to modes such as the long-time operation mode and normal-time operation mode, which are used when cleaning highly dirty dishes, etc. Is unlikely to occur.

  Furthermore, according to this dishwasher 1, it is possible to determine whether or not the washing water in the washing tank 9 has been replaced by using the water level detection switch 10 of the washing tank 9 that is normally provided. It is possible to determine the replacement without providing another. Therefore, according to this dishwasher 1, since replacement | exchange of washing water can be determined, without increasing a number of parts, it is advantageous to suppression of manufacturing cost.

  Moreover, according to this dishwasher 1, after outputting alert, it locks in a driving | running stop state until it determines with washing water having been replaced, and it prevents that a user forgets to replace washing water. Because it can, it can be thorough hygiene management.

[Second Embodiment]
The tableware washing machine 1 according to the second embodiment is different from the first embodiment only in that an alert is output according to the number of washing cycle operations.

  Specifically, the microcomputer 30 of the dishwasher 1 according to the second embodiment functions as an operation number counter that counts the number of operations instead of the integration timer that counts the integrated operation time. The number of operations is counted as one cleaning cycle operation. The microcomputer 30 counts the number of times of operation using, for example, a magnet switch that detects opening and closing of the door 4. The dishwasher 1 notifies the user of the timing at which the number of operations reaches the set number of operations preset by the user as the replacement timing.

  Hereinafter, the alert operation in which the dishwasher 1 according to the second embodiment informs the user of the replacement timing of the cleaning water in the cleaning tank 9 will be described.

  As shown in FIG. 4, in the dishwasher 1 according to the second embodiment, when the number of remaining operations until the number of operations reaches the set number of operations is equal to or less than a predetermined number of times, an announcement of the number of remaining operations is made. Perform (S11). The timing for making the announcement can be set in advance by the user. Note that the announcement of the remaining number of operations is not essential, and step S11 may be omitted.

  Next, the dishwasher 1 recognizes that the number of operations exceeds the set number of operations (S12). When the dishwasher 1 recognizes that the set number of operation times has been exceeded, it proceeds to step S13.

  In step S13, the dishwasher 1 starts outputting an alert. The alert is output by image output and sound output on the display unit 42 of the operation panel 3. The alert output continues until it is canceled in step S15.

  Moreover, in step S13, the operation stop state of the dishwasher 1 is locked. When the dishwasher 1 is in operation, it is locked after being switched to the operation stop state. This lock in the operation stop state continues until it is released in step S18.

  Next, in step S14, it is determined whether or not the drainage of the cleaning water in the cleaning tank 9 has been detected. This step S14 is repeated until the drainage of the washing water in the washing tank 9 is detected, during which the operation stop lock and the alert output are continued.

  The detection of the drainage of the washing water in step S14 is performed by the water level detection switch 10. The tableware washing machine 1 determines that the drainage of the washing water in the washing tank 9 has been detected when the washing water level in the washing tank 9 decreases and the water level detection switch 10 is switched to OFF. That is, the dishwasher 1 repeats step S14 until the user pulls out the overflow pipe 11 from the washing tank 9 and drains the washing water.

  When it is determined that the washing water in the washing tank 9 is detected, the dishwasher 1 cancels the alert (S15). Moreover, the dishwasher 1 clears the operation number counter in the microcomputer 30.

  Subsequently, after the user attaches the overflow pipe 11 and closes the door 4 to turn on the power, the dishwasher 1 starts water supply to the washing tank 9 (S16). The dishwasher 1 drives the rinse pump 25 to rinse the hot water in the hot water storage tank 18 from the nozzles 6 and 8 into the washing chamber R, and the injected hot water enters the washing tank 9 below the washing chamber R. Supply water by flowing in.

  Thereafter, the dishwasher 1 detects the completion of water supply by switching the water level detection switch 10 to ON (S17). When the dishwasher 1 detects the completion of water supply, it determines with the wash water in the washing tank 9 having been replaced.

  When it is determined that the washing water in the washing tank 9 has been replaced, the dishwasher 1 confirms that the operation is possible and unlocks the operation stop state (S18). In step S <b> 18, the dishwasher 1 starts counting the operation number counter by the microcomputer 30. Thereafter, the dishwasher 1 repeats the operation from step S11 again in accordance with the number of washing cycle operations.

  According to the dishwasher 1 which concerns on 2nd Embodiment demonstrated above, there can exist an effect similar to the dishwasher 1 which concerns on 1st Embodiment. Moreover, according to this dishwasher 1, since an alert is output according to the actual number of times of operation, it is unnecessary to drain cleaning water with less dirt compared to a case where an alert is simply output at regular intervals. It is possible to prevent the cleaning water from becoming too dirty during busy periods. Therefore, according to this dishwasher 1, since the user can be notified of the replacement timing according to the actual degree of dirt, it is possible to support sanitary management without waste. In addition, depending on the user, there are cases where it is easier to sensibly imagine managing by the number of driving times than by managing the driving time, so that hygiene management support that suits the user can be realized.

  Note that the dishwasher 1 may have a function of switching between alarm output management according to the operation time and alarm output management according to the number of operations according to the user's setting.

[Third Embodiment]
Compared with the first embodiment, the dishwasher 1 according to the third embodiment stores a history of past washing water replacement, a history of past accumulated operation time, and a history of the number of past operations, The difference is that the replacement timing is determined based on the replacement cycle time and the daily usage time input by the user and the stored cumulative operation time and the history of the number of operations.

  Specifically, the microcomputer 30 of the dishwasher 1 according to the third embodiment includes a database that stores a history of past washing water replacement, a history of past accumulated operation time, and a history of the number of past operations. Yes. In this database, a history such as the date and time when the washing water was replaced, and a history of the accumulated operation time and the number of operations per day are stored.

  Further, the microcomputer 30 stores the replacement cycle time and the daily usage time input by the user from the operation panel 3. The replacement cycle time is a reference time for a replacement cycle desired by the user when the dishwasher 1 is continuously used. The daily usage time is a time during which the dishwasher 1 may be used during the day. For example, it corresponds to business hours in a restaurant.

The microcomputer 30 determines the replacement timing based on the history of the replacement cycle time, the daily usage time, and the operation time. For example, the microcomputer 30 determines the replacement timing X of the day from the following equation (1), where A is the replacement cycle time, B is the usage time of the day, and C is the integrated operation time on the corresponding day one year ago.

  In the above formula (1), if the replacement cycle time A is 2 hours, the daily usage time B is 8 hours, and the accumulated operation time C per day is 4 hours, the replacement timing X is 4 hours. In addition, the count of the replacement timing in this embodiment is not a cumulative operation time but a normal time. Further, the accumulated operation time C may be calculated by using a plurality of data including not only data of one year ago but also data of two years ago or more.

  Alternatively, the microcomputer 30 stores in advance a plurality of operation time patterns corresponding to busy conditions, determines the operation time pattern of the current day based on the past accumulated operation time, the history of the number of operations, etc., and determines the determined operation It may be a mode in which the replacement timing corresponding to the time pattern is determined. For example, it is conceivable that the microcomputer 30 creates three patterns according to the amount of operation time per day. In this case, the microcomputer 30 sets the replacement timing to 4 hours for a pattern with a short operation time. For the normal pattern of operation time, the replacement timing is set to 3 hours. For patterns with a lot of operating time, the replacement timing is set to 2 hours.

  Further, the microcomputer 30 determines the replacement timing based on the day of the week data. The microcomputer 30 causes the user to input the replacement cycle time during busy days and busy times, and the replacement cycle time during normal days other than busy days and normal times.

  If Saturday and Sunday are busy days, the microcomputer 30 sets 2 hours, which is a replacement cycle time during busy hours on Saturday and Sunday. If Monday to Friday is a normal day, the microcomputer 30 sets 3 hours, which is a normal replacement cycle time from Monday to Friday. The microcomputer 30 determines the replacement timing based on the replacement cycle time corresponding to the day of the week data. The microcomputer 30 may determine the replacement cycle time as it is as the replacement timing. Further, the replacement timing may be a count based on a normal time in addition to a count based on the accumulated operation time. Furthermore, the setting of the replacement cycle time is not limited to the two types of busy time and normal time, but may be three or more types.

  Note that the determination of the replacement timing by the microcomputer 30 is not limited to the case of being performed on a daily basis, and may be monthly or weekly, or may be determined separately for morning and afternoon.

  According to the dishwasher 1 which concerns on 3rd Embodiment demonstrated above, since the log | history of replacement | exchange of washing water is memorize | stored in the microcomputer 30, the past replacement | exchange history is confirmed also by third parties other than an actual user. This makes it possible to ensure more thorough hygiene management.

  Further, according to the dishwasher 1, the replacement timing is automatically determined based on the replacement cycle time and the daily usage time input by the user, the past accumulated operation time history, and the past operation frequency history. Can be done automatically. Therefore, according to this dishwasher 1, since the determination of the suitable replacement timing according to a date and a time zone is performed automatically, efficient hygiene management can be performed.

  Furthermore, according to this dishwasher 1, since the two replacement cycle times between the busy time and the normal time are switched based on the day of the week data, efficient hygiene management corresponding to the variation in the ease of washing water depending on the day of the week is performed. It can be carried out.

[Fourth Embodiment]
The dishwasher 51 according to the fourth embodiment shown in FIG. 5 is different from the first embodiment only in that the washing water in the washing tank 9 is automatically replaced. In addition, the same code | symbol is attached | subjected to the same component as the dishwasher 1 which concerns on 1st Embodiment, and the overlapping description is abbreviate | omitted.

  Specifically, the dishwasher 51 according to the fourth embodiment includes a drainage electromagnetic valve 52 instead of the overflow pipe 11. The drain solenoid valve 52 is provided in the middle of a drain pipe 53 that extends downward from the bottom surface 9 a of the cleaning tank 9. The electromagnetic valve 52 for drainage is opened under the control of the microcomputer 30 and drains the cleaning water in the cleaning tank 9.

  Hereinafter, a replacement operation in which the dishwasher 51 according to the fourth embodiment replaces the cleaning water in the cleaning tank 9 will be described.

  As shown in FIG. 6, in the dishwasher 51, when the remaining time until the accumulated operation time reaches the set accumulated time is equal to or shorter than a predetermined time, the remaining time is announced (S21). The timing for making the announcement can be set in advance by the user. The announcement of the remaining time is not essential, and step S21 may be omitted.

  Next, the dishwasher 51 recognizes that the accumulated operation time has passed the set accumulated time (S22). When the dishwasher 51 recognizes the elapse of the set integration time, the dishwasher 51 proceeds to step S23. When the dishwasher 51 recognizes that the set integration time has elapsed during the cleaning cycle operation, the tableware washing machine 51 proceeds to step 23 after the washing cycle operation in which the integration operation time has passed the set integration time has ended.

  In step S23, the dishwasher 51 starts outputting an alert that informs the user of the replacement timing of the washing water. The alert is output by image output and sound output on the display unit 42 of the operation panel 3.

  The dishwasher 51 informs the user that an automatic replacement of the washing water is performed by an alert. Thereafter, the dishwasher 51 continues to output an alert for notifying that washing water is being automatically replaced in step S29.

  In step S23, the operation stop state of the dishwasher 51 is locked. When the dishwasher 51 is in operation, the lock is performed after switching to the operation stop state. This lock in the operation stop state continues until it is released in step S29.

  Next, in step S24, the dishwasher 51 starts draining the washing water by opening the drain electromagnetic valve 52. Thereafter, the dishwasher 51 detects the completion of drainage by the water level detection switch 10 and the drainage time (S25).

  Subsequently, when the dishwasher 51 detects the completion of drainage, it determines that the washing water will be replaced, and clears the integration timer in the microcomputer 30 (S26).

  Next, the dishwasher 51 starts water supply to the washing tank 9 (S27). The dishwasher 51 drives the rinsing pump 25 to rinse the hot water in the hot water storage tank 18 into the washing chamber R from the nozzles 6 and 8, and the injected hot water enters the washing tank 9 below the washing chamber R. Supply water by flowing in.

  Then, the dishwasher 51 detects the completion of water supply by switching the water level detection switch 10 to ON (S28). When the dishwasher 1 detects the completion of water supply, it determines with the wash water in the washing tank 9 having been replaced.

  The tableware washing machine 51 cancels | releases an alert, when it determines with the washing water in the washing tank 9 having been replaced (S29). Moreover, in step S29, the dishwasher 51 confirms that it became a driving | operation possible state, and cancels | releases the lock | rock of a driving | operation stop state. Moreover, the dishwasher 51 starts the counting of the integration timer by the microcomputer 30. Thereafter, the dishwasher 51 repeats the operation from step S21 again according to the accumulated operation time.

  According to the tableware washing machine 51 which concerns on 4th Embodiment demonstrated above, since replacement | exchange of washing water is performed automatically, without a user working, more reliable hygiene management can be performed. A drainage pump may be used instead of the drainage solenoid valve 52.

[Fifth Embodiment]
The dishwasher 61 according to the fifth embodiment shown in FIG. 7 is a so-called conveyor type dishwasher.

  In the conveyor type tableware washing machine 61, the tableware D is washed and rinsed while the tableware D is sent in the conveying direction shown in FIG. On the left side of the conveyor type dishwasher 61, a soil table 63 for placing a rack 62 containing dirty dishes D is installed, and on the right side, a rack 62 containing washed dishes D is placed. A clean table 64 is installed.

  The conveyor-type dishwasher 61 has a stainless steel casing 65 that forms a cleaning chamber R. A cleaning chamber R is formed in the upper part of the housing 65, and a cleaning tank 66 is formed in the lower part. On the user side of the cleaning tank 66 (the front side in FIG. 1), an operation panel 67 is provided for the user to start and stop the operation and operate various settings.

  As shown in FIG. 8, the operation panel 67 switches a setting switch 68 for the user to set the number of operations, a display unit 69 for displaying hot water temperature information and other information, and a setting mode. There are provided a mode changeover switch 70, an operation switch 71 for switching the power ON and OFF, and various display lamps 72 for notifying the user of the operation state of the conveyor type dishwasher 61. The operation panel 67 has a sound output function for outputting a warning sound and a sound announcement.

  As shown in FIG. 7, a pair of left and right extending in a washing room R provided in a casing 65 of a conveyor type dishwasher 61 so as to bridge between a soil table 63 and a clean table 64. Rack rail 73 is installed. The rack 62 placed on the rack rail 73 is transported in one direction by a conveyor 74 disposed in the cleaning chamber R. The conveyor 74 is driven by a conveyor driving motor 75.

  The cleaning chamber R is partitioned by a curtain 76, the entrance side is a cleaning region R1, and the exit side is a rinsing region R2. Further, the upper end of the curtain 77 is fixed to the casing 65 so as to close the entrance of the conveyor type dishwasher 61, and the upper end of the curtain 78 is fixed to the casing 65 so as to close the outlet of the conveyor type dishwasher 61. Yes. The curtains 76, 77, and 78 are formed with strip-shaped cuts to allow the rack 62 to pass therethrough.

  In the cleaning region R1, an upper cleaning nozzle 79 for spraying cleaning water from above and a lower cleaning nozzle 80 for spraying cleaning water from below are arranged. The upper cleaning nozzle 79 is connected to the cleaning pump 82 via the water supply pipe 81, and the lower cleaning nozzle 80 is connected to the cleaning pump 84 via the water supply pipe 83. The suction ports of the cleaning pumps 82 and 84 communicate with the cleaning tank 66.

  Washing water after washing and rinsing water after rinsing flow into the washing tank 66 and are stored. Excess cleaning water in the cleaning tank 66 is discharged to the outside through the overflow pipe 85. By removing the overflow pipe 85, the cleaning water in the cleaning tank 66 is drained. The cleaning tank 66 is provided with a water level detection switch (water level detection means) 86 for detecting the level of the cleaning water. The water level detection switch 86 is a switch that is turned on when the water level of the cleaning water in the cleaning tank 66 exceeds the predetermined water level H, and is turned off when the water level is lower than the predetermined water level H.

  In the rinsing region R2, an upper rinsing nozzle 87 for spraying rinsing water from above and a lower rinsing nozzle 88 for spraying rinsing water from below are arranged. The upper rinsing nozzle 87 and the lower rinsing nozzle 88 are connected to a rinsing pump 90 through a water supply pipe 89. The suction port of the rinsing pump 90 communicates with the hot water storage tank 91.

  The conveyor type dishwasher 61 is disposed upstream of the cleaning nozzles 79 and 80 in the rack transport direction and detects a cleaning rack detection switch 92 for detecting the passage of the rack 62, and upstream of the rinse nozzles 87 and 88 in the rack transport direction. A rinsing rack detection switch 93 that is disposed on the side and detects the passage of the rack 62. The rack 62 is transported in a state where the bottom side of the rack 62 is hooked on the feed claw 74 a of the conveyor 74.

  The conveyor type dishwasher 61 is provided with a microcomputer 94 that controls the overall operation. The microcomputer 94 is provided on the user side of the cleaning tank 66. The microcomputer 94 has a function as an integration timer that counts the integrated operation time obtained by integrating the operation time. The operation time in this embodiment is the time during which the conveyor driving motor 75 is driven. The microcomputer 94 accumulates the time during which the conveyor driving motor 75 is driven without clearing the accumulation timer even when the operation is stopped or the power is turned off.

  A cleaning operation in the conveyor type dishwasher 61 will be described. In this conveyor type dishwasher 61, when the user pushes the rack 62 on which the tableware D is placed into the washing room R from the entrance, and the washing rack detection switch 92 detects the rack 62, the washing pumps 82 and 84 are driven. Then, the cleaning process of the tableware D is started. In the cleaning process, the tableware D is cleaned by the cleaning water sprayed from the cleaning nozzles 79 and 80 while being transported together with the rack 62 by driving the conveyor 74.

  Thereafter, when the tableware D is conveyed and enters the rinsing region R2 from the cleaning region R1, and the rinsing rack detection switch 93 detects the rack 62, the rinsing pump 90 is driven to start the rinsing process. In the rinsing step, rinsing is performed by rinsing water sprayed from the rinsing nozzles 87 and 88 while the tableware D is conveyed along with the rack 62 by driving the conveyor 74. Then, the tableware D is carried out from the exit side of the conveyor type dishwasher 61.

  Next, an alert operation in which the conveyor type dishwasher 61 informs the user of the replacement timing of the washing water in the washing tank 66 will be described.

  The conveyor type dishwasher 61 performs an alert operation according to the accumulated operation time counted by the microcomputer 94 functioning as an accumulation timer. The conveyor-type dishwasher 61 notifies the user of the timing at which the accumulated operation time has reached the set accumulated time set in advance by the user as the replacement timing.

  As shown in FIG. 9, in the conveyor type dishwasher 61, when the remaining time until the accumulated operation time reaches the set accumulated time is equal to or shorter than a predetermined time, the remaining time is announced (S31). The timing for making the announcement can be set in advance by the user. The announcement is made by displaying the remaining time on the display unit 69 of the operation panel 67 and outputting sound. As an audio output, an audio announcement and warning sound for the remaining time are output. The announcement of the remaining time is not essential, and step S31 may be omitted.

  Next, the conveyor type dishwasher 61 recognizes that the accumulated operation time has passed the set accumulated time (S32). If the conveyor-type dishwasher 61 recognizes that the set accumulated time has elapsed, the conveyor-type dishwasher 61 proceeds to step S33. When the conveyor type tableware washing machine 61 recognizes that the set integration time has elapsed during the cleaning cycle operation, the conveyor type tableware washing machine 61 proceeds to Step 33 after the cleaning cycle operation in which the integration operation time has passed the set integration time is completed.

  In step S33, the conveyor type dishwasher 61 starts outputting an alert that informs the user of the replacement timing of the washing water. The alert is output by image output and sound output on the display unit 69 of the operation panel 67. Specifically, the character “Ch”, which is an abbreviation of “Change”, is displayed on the display unit 69 in a blinking manner. Also, voice announcements and warning sounds are output at predetermined intervals. The alert output continues until it is canceled in step S35. Note that the user can select a mode in which the alert output is stopped when a predetermined time has elapsed even when the process does not proceed to step S35.

  In step S33, the operation stop state of the conveyor type dishwasher 61 is locked. When the conveyor type dishwasher 61 is in operation, the lock is performed after switching to the operation stop state. This lock in the operation stop state continues until it is released in step S38. The user can switch between a mode in which the operation stop state is locked after the alert is output and a mode in which the operation can be performed after the alert is output.

  Next, in step S34, it is determined whether or not drainage of the cleaning water in the cleaning tank 66 has been detected. This step S34 is repeated until the drainage of the washing water in the washing tank 66 is detected. During this time, the operation stop state lock and the alert output are continued.

  The detection of the drainage of the washing water in step S34 is performed by the water level detection switch 86. The conveyor-type tableware washing machine 61 determines that the washing water in the washing tank 66 is detected when the washing water level in the washing tank 66 decreases and the water level detection switch 86 is turned off. That is, the conveyor type dishwasher 61 repeats step S34 until the user removes the overflow pipe 85 from the washing tank 66 and drains the washing water.

  If the conveyor-type dishwasher 61 determines that the washing water in the washing tank 66 has been discharged, it cancels the alert (S35). Further, the conveyor type dishwasher 61 clears the integration timer in the microcomputer 94.

  Subsequently, after the user attaches the overflow pipe 85 and closes the housing 65 to turn on the power, the conveyor type dishwasher 61 starts water supply to the washing tank 66 (S36). The conveyor type dishwasher 61 drives the rinsing pump 90 to inject hot water in the hot water storage tank 91 into the cleaning chamber R from the rinsing nozzles 87 and 88, and the injected hot water is in the cleaning tank 66 below the cleaning chamber R. Water is supplied by flowing in.

  Thereafter, the conveyor type dishwasher 61 detects the completion of water supply by switching the water level detection switch 86 to ON (S37). When the conveyor type dish washer 61 detects the completion of water supply, it determines that the cleaning water in the cleaning tank 66 has been replaced.

  When it is determined that the washing water in the washing tank 66 has been replaced, the conveyor type dishwasher 61 confirms that the operation is possible and releases the lock in the operation stop state (S38). In step S38, the conveyor type dishwasher 61 starts counting of an integration timer by the microcomputer 94. Thereafter, the conveyor type dishwasher 61 repeats the operation from step S31 again according to the accumulated operation time.

  According to the conveyor type dishwasher 61 demonstrated above, the effect similar to the door type dishwasher 1 which concerns on 1st Embodiment can be acquired. That is, according to this conveyor type dishwasher 61, by outputting an alert notifying the user of the replacement timing of the cleaning water, the user can perform the replacement before the cleaning water becomes too dirty. Can support hygiene management. Moreover, according to the conveyor type dishwasher 61, the user who notices the alert before the washing water becomes too dirty can be replaced to prevent clogging of the washing nozzles 79, 80 and the like due to accumulation of dirt. Therefore, the cleaning performance of the conveyor type dishwasher 61 can be maintained. Therefore, according to this conveyor type tableware washing machine 61, it is possible to support the hygiene management by the user and maintain the washing ability.

  The present invention is not limited to the embodiment described above.

  For example, in the conveyor type dishwasher 61 which concerns on 5th Embodiment, you may perform the alert output according to the frequency | count of driving | operation like 2nd Embodiment. In this case, the conveyor-type dishwasher 61 can count the number of operations using the washing rack detection switch 92 and the like.

  Moreover, in the conveyor type dishwasher 61 which concerns on 5th Embodiment, it is good also as an aspect which replaces washing water automatically like 3rd Embodiment. Further, as in the fourth embodiment, the replacement timing may be automatically determined according to various past histories and user settings.

DESCRIPTION OF SYMBOLS 1,51 ... Tableware washing machine 2 ... Main body case 3 ... Operation panel 9 ... Washing tank 10 ... Water level detection switch (water level detection means) 11 ... Overflow pipe 14 ... Washing pump 18 ... Hot water storage tank 25 ... Rinsing pump 30 ... Microcomputer 31 ... Electrical box 42 ... Display section 51 ... Dishwasher 52 ... Drainage solenoid valve 61 ... Conveyor type dishwasher 62 ... Rack 65 ... Housing 66 ... Washing tank 67 ... Operation panel 68 ... Setting switch 69 ... Display section 70 ... Mode Switch 71 ... Operation switch 72 ... Indicator lamp 74 ... Conveyor 75 ... Conveyor drive motor 82, 84 ... Washing pump 85 ... Overflow pipe 86 ... Water level detection switch 89 ... Water supply pipe 90 ... Rinsing pump 91 ... Hot water storage tank 92 ... For washing Rack detection switch 93 ... Rinsing rack detection switch 94 ... Icon D ... dishwashing R ... washing chamber R1 ... washing zone R2 ... rinsing region

Claims (4)

A cleaning operation including a cleaning process of cleaning dishes with cleaning water in a cleaning tank and a rinsing process of rinsing the dishes with rinsing water in a hot water storage tank is performed, and the cleaning water used in the cleaning process and the rinsing process are used. A dishwasher for recovering the rinse water in the washing tank and reusing it in the washing water,
An alert that informs the user of the replacement timing of the cleaning water in the cleaning tank is output ,
After starting the output of the alert, it is determined whether or not the wash water in the wash tank has been replaced based on the detection result of the water level detection means for detecting the water level in the wash tank,
When the water level in the washing tank is lowered and the water level detecting means is switched to OFF, it is determined that drainage for replacing the washing water is detected, and the alert is canceled. Dishwasher.   The dishwasher according to claim 1, wherein the alert is output in accordance with an accumulated operation time obtained by integrating operation times.   The dishwasher according to claim 1 or 2, wherein the alert is output according to the number of times of the washing operation. The dishwasher according to any one of claims 1 to 3 , wherein after the alert is output, the operation is stopped until it is determined that the washing water has been replaced.

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