JP2013223813A - Dishwasher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dishwasher 1 readily suppressing contamination of washing water in a washing tank.SOLUTION: In the dishwasher 1, a cycle operation including a rinsing step of spraying rinsing water in a hot water-storing tank 28 into the washing chamber 5 after the washing step of spraying the washing water in the washing tank 15 into a washing chamber 5 can be performed, the rinsing water sprayed into the washing chamber 5 is collected for use as washing water in the following washing step, and washing water stored in the washing tank 15 is replaced by the amount of rinsing water sprayed. In such a dishwasher 1, a microcomputer 4 increases the amount of rinsing water sprayed into the washing chamber 5 after the cycle operation of a prescribed number of times is performed.

Description

  The present invention relates to a dishwasher for cleaning an object to be cleaned by injecting cleaning water in a cleaning tank into a cleaning chamber, and rinsing the object to be cleaned by injecting rinsing water in a hot water storage tank into the cleaning chamber.

  2. Description of the Related Art Conventionally, there is a dishwasher that sprays cleaning water in a cleaning tank into a cleaning chamber to clean the object to be cleaned and sprays rinsing water in a hot water storage tank into the cleaning chamber to rinse the object to be cleaned. In this dishwasher, the washing water and the rinsing water sprayed into the washing chamber are collected and stored in the washing tank as washing water used for the next washing. For this reason, when cleaning is repeated many times or when the object to be cleaned is very dirty, the cleaning water in the cleaning tank may become very dirty. If the cleaning water in the cleaning tank becomes very dirty, the cleaning performance deteriorates, which is a problem.

  Therefore, Patent Document 1 proposes a dishwasher that is provided with a drain valve that drains washing water in the washing tank and drains a predetermined amount of washing water in the washing tank before rinsing is started. In this dishwasher, before starting rinsing, the drain valve is opened to drain a predetermined amount of dirty washing water. Thereafter, by performing rinsing, relatively clean rinsing water is accumulated in the washing tank, and contamination of the washing water in the washing tank can be suppressed.

JP-A-8-24194

  However, in the dishwasher described in Patent Document 1, it is necessary to newly include a control unit for draining a predetermined amount and a drain valve. The drain valve has a complicated structure that prevents foreign matter from being caught, and the unit price is high. Therefore, there is a problem in mounting the drain valve on a dishwasher.

  It is also conceivable that the user is instructed to drain the cleaning water in the cleaning tank and have the cleaning tank again stored in the cleaning tank when the cleaning water is very dirty. However, in this case, it is not surely performed by the user, and it takes time to replace the cleaning water, which increases the burden on the user.

  Then, an object of this invention is to provide the dishwasher which can suppress the stain | pollution | contamination of the washing water in a washing tank easily.

  The dishwasher of the present invention includes a cycle including performing a rinsing step of injecting rinsing water in a hot water storage tank into a cleaning chamber by a rinsing pump after performing a cleaning step of injecting rinsing water in the cleaning tank into the cleaning chamber. The operation can be performed, and the rinse water injected into the cleaning chamber is collected and used as the cleaning water in the next cleaning process, and the cleaning water stored in the cleaning tank is replaced by the amount of the rinse water injected. The dishwasher is characterized by comprising control means for increasing the amount of rinse water sprayed into the washing chamber after the cycle operation has been performed a predetermined number of times.

  In the dishwasher according to the present invention, the washing water stored in the washing tank is replaced by the amount of the rinse water jetted. Then, after the cycle operation is performed a predetermined number of times, the control means can change the replacement amount of the cleaning water in the cleaning tank by increasing the amount of the rinsing water injected into the cleaning chamber. For example, when the cycle operation is performed a predetermined number of times and the degree of contamination of the washing water in the washing tank is severe, changing the amount of rinsing water sprayed into the washing chamber to wash more washing water The amount of dirty wash water that is discharged from the tank and replaced with relatively clean rinse water increases. Therefore, it is possible to keep the cleaning water in the cleaning tank in a more clean state and suppress contamination. For this reason, the cleaning ability can be maintained.

  In the dishwasher of this invention, it is also preferable that a control means increases the quantity of the rinse water injected into a washing chamber by driving a rinse pump during a washing | cleaning process.

  By driving the rinse pump during the cleaning process, the amount of rinse water sprayed into the cleaning chamber increases. For this reason, the replacement amount in which the dirty cleaning water in the cleaning tank is replaced with relatively clean rinse water increases. Therefore, it is possible to keep the cleaning water in the cleaning tank in a more clean state and easily suppress contamination. In addition, the cleaning water in the cleaning tank can be kept in a clean state without increasing the time required for one cycle operation. In addition, since the rinse pump driven during the cleaning process is driven according to the state of contamination of the cleaning water in the cleaning tank, when the state of cleaning water in the cleaning tank is predicted to be relatively low, The rinsing pump is not driven. For this reason, an increase in running cost can be suppressed.

  According to the dishwasher of the present invention, it is possible to easily suppress contamination of the washing water in the washing tank.

It is a figure which shows the dishwasher which concerns on this embodiment. It is a flowchart which shows operation | movement of the dishwasher which concerns on this embodiment. It is a flow which shows operation | movement of the dishwasher which concerns on the 1st modification of this embodiment. It is a flow which shows the structure of the double pipe with which the dishwasher which concerns on the 2nd modification of this embodiment is provided. It is a flowchart which shows operation | movement of the dishwasher which concerns on the 2nd modification of this embodiment. It is a flowchart which shows the operation | movement of the cycle driving | operation in the dishwasher which concerns on the 2nd modification of this embodiment. It is a flowchart which shows the operation | movement of the cycle driving | operation in the dishwasher which concerns on the 2nd modification of this embodiment. It is a flowchart which shows operation | movement of the dishwasher which concerns on the 3rd modification of this embodiment. It is a flowchart which shows operation | movement of the dishwasher which concerns on the 4th modification of this embodiment. It is a flowchart which shows operation | movement of the dishwasher which concerns on the 5th modification of this embodiment. It is a flowchart which shows operation | movement of the dishwasher which concerns on the 6th modification of this embodiment. It is a flowchart which shows operation | movement of the dishwasher which concerns on the 7th modification of this embodiment. It is a figure which shows the dishwasher which concerns on the 8th modification of this embodiment. It is a flowchart which shows operation | movement of the dishwasher which concerns on the 8th modification of this embodiment. It is a figure which shows the dishwasher which concerns on the 9th modification of this embodiment. It is a flowchart which shows operation | movement of the dishwasher which concerns on the 9th modification of this embodiment. It is a figure which shows the dishwasher which concerns on the 10th modification of this embodiment. It is a flowchart which shows operation | movement of the dishwasher which concerns on the 10th modification of this embodiment. It is a flowchart which shows operation | movement of the dishwasher which concerns on the 11th modification of this embodiment.

  Hereinafter, embodiments of a dishwasher according to the present invention will be described in detail with reference to the drawings. In the description, the same reference numerals are used for the same elements or elements having the same function, and a duplicate description is omitted.

  The dishwasher 1 shown in FIG. 1 is a device that cleans tableware P with cleaning water containing a detergent and rinses with clean rinse water. This dishwasher 1 has a main body case 2 made of stainless steel. The lower side partitioned in the main body case 2 functions as a machine room 3. Housed in the machine room 3 is an electrical box 6 in which a microcomputer (hereinafter referred to as “microcomputer”) 4 for controlling the overall operation of the dishwasher 1 is incorporated. On the other hand, the upper side of the main body case 2 functions as a cleaning chamber 5, and a door (not shown) that moves up and down is provided to open and close the cleaning chamber 5.

  A rack rail (not shown) is detachably disposed in the cleaning chamber 5, and a grid-like tableware rack 8 in which dishes P such as dishes and teacups are arranged on the rack rail. Placed. An upper cleaning nozzle 9 composed of three arms extending radially and an upper rinse nozzle 11 composed of two arms are rotatably disposed above the cleaning chamber 5. Similarly, a lower cleaning nozzle 12 composed of three arms extending radially and a lower rinse nozzle 13 composed of two arms are rotatably arranged in the lower part of the cleaning chamber 5. Accordingly, since the cleaning water is sprayed from above and below by the cleaning nozzles 9 and 12 in the cleaning process, and the rinsing water is sprayed from above and below by the rinsing nozzles 11 and 13 in the rinsing process, The cleaning and rinsing of the tableware P is performed efficiently.

  A first filter 14 is detachably disposed on the bottom surface 5 a of the cleaning chamber 5 configured as described above, and a cleaning tank 15 for storing cleaning water is provided below the first filter 14. Is formed. A cleaning water heater 16 that heats the cleaning water and a cleaning water temperature sensor 17 that detects the temperature of the cleaning water are installed in the cleaning tank 15 in order to improve the cleaning performance and the sterilization performance.

  Further, a mesh-like second filter 18 finer than the first filter 14 is detachably disposed on the bottom surface 15 a of the cleaning tank 15, and the bottom surface 15 a is disposed below the second filter 18. A drop portion 19 is formed so that a part of the drop portion falls. A drain pipe 20 is connected to the bottom surface 19 a of the drop-in portion 19, and the drain pipe 20 passes through a cylindrical portion 18 a formed of a sheet metal of the second filter 18, and an upper end portion is the cleaning tank 15. The lower end portion of the overflow pipe 21 located inside is fitted. Therefore, excess cleaning water flows into the pipe from the inflow hole formed in the upper end portion of the overflow pipe 21, and is discharged to the outside through the drain pipe 20, so that the cleaning water in the cleaning tank 15 is always at a constant water level. Kept.

  A cleaning pump 23 is connected to the drop portion 19 of the cleaning tank 15 via a cleaning water suction pipe 22. A cleaning water discharge pipe 24 is connected to the discharge port of the cleaning pump 23, and the cleaning water discharge pipe 24 branches into a first cleaning water discharge pipe 25 and a second cleaning water discharge pipe 26, and One cleaning water discharge pipe 25 is connected to the upper cleaning nozzle 9, and the second cleaning water discharge pipe 26 is connected to the lower cleaning nozzle 12.

  Further, a hot water storage tank 28 to which rinsing water is supplied from an external water heater (not shown) via a hot water supply pipe 27 is disposed in the machine room 3. In the hot water storage tank 28, a rinsing water heater 29 for heating the rinsing water to improve the sterilizing ability and a rinsing water temperature sensor 31 for detecting the temperature of the rinsing water are installed. Further, an overflow pipe 32 is provided in the hot water storage tank 28 for discharging excess rinsing water to the outside and keeping it at a constant water level. It is discharged to the outside.

  A rinse pump 34 is connected to the hot water storage tank 28 via a rinse water suction pipe 33. A rinse water discharge pipe 36 is connected to the discharge port of the rinse pump 34, and the rinse water discharge pipe 36 branches into a first rinse water discharge pipe 37 and a second rinse water discharge pipe 38, and The first rinse water discharge pipe 37 is connected to the upper rinse nozzle 11, and the second rinse water discharge pipe 38 is connected to the lower rinse nozzle 13.

  Further, in the machine room 3, a detergent tank 39 storing a detergent W to be mixed with the washing water in the washing tank 15 is disposed. A detergent supply pump 42 is connected to the detergent tank 39 via a detergent suction pipe 41. One end of a detergent discharge pipe 43 is connected to the discharge port of the detergent supply pump 42, and the other end 43 a of the detergent discharge pipe 43 is located in the cleaning chamber 5 and opens downward.

  When the power switch is turned on, the dishwasher 1 injects hot water in the hot water storage tank 28 into the washing chamber 5 by the rinse pump 34, thereby supplying hot water into the washing tank 15. Thereby, initial hot water supply is performed. Then, an amount of detergent corresponding to the initial hot water supply amount is supplied into the cleaning tank 15, and the detergent concentration of the cleaning water in the cleaning tank 15 becomes a predetermined concentration.

  After the initial hot water supply, when the user racks the tableware P and closes the door (not shown), the door switch (not shown) detects that the door has been closed, and the operation start signal is sent to the microcomputer 4. Is input. When the operation start signal is input to the microcomputer 4, the cleaning process is started. The cleaning process is a process of cleaning the tableware P by spraying the cleaning water in the cleaning tank 15 toward the tableware P in the cleaning chamber 5.

  When the cleaning process is started, the cleaning pump 23 is started, and the cleaning water stored in the cleaning tank 15 is pumped to the upper and lower cleaning nozzles 9 and 12 through the cleaning water discharge pipe 24 and the like, and each cleaning is performed. Sprayed from the nozzles 9 and 12 toward the tableware P in the cleaning chamber 5. At this time, since each of the cleaning nozzles 9 and 12 continues to rotate due to the reaction force of the injection force, the cleaning water is uniformly applied to the tableware P, and the stains on the tableware P are efficiently washed off.

  The washing water sprayed into the washing chamber 5 is collected in the washing tank 15 while the leftovers washed off from the tableware P are removed by the first filter 14. Further, after the fine leftovers are removed by the second filter 18, the cleaning pump 23 circulates and supplies it again into the cleaning chamber 5.

  When such a cleaning process is performed for a predetermined time, the cleaning pump 23 stops and the cleaning process ends. Thereafter, it enters a resting state for a predetermined time (about 5 seconds). This resting state is a state where the cleaning pump 23 and the rinsing pump 34 are stopped. When a predetermined pause time elapses, the rinsing process is started. The rinsing step is a step of rinsing the tableware P by injecting the rinse water in the hot water storage tank 28 toward the tableware P in the cleaning chamber 5 by the rinse pump 34.

  In addition, after the cleaning pump 23 is stopped, a drop of cleaning water falls from the upper cleaning nozzle 9. If drops of dirty cleaning water fall during the rinsing process, rinsing with clean rinsing water is wasted. Therefore, by providing a resting state, it is possible to prevent waste of rinsing by starting the rinsing process after the drops of washing water have finished dropping from the upper washing nozzle 9.

  When the rinsing process is started, the rinsing pump 34 is started, and the rinsing water stored in the hot water storage tank 28 is pumped to the upper and lower rinsing nozzles 11 and 13 through the rinsing water discharge pipe 36 and the like, and each rinsing is performed. Sprayed from the nozzles 11 and 13 toward the tableware P. At this time, since each of the rinsing nozzles 11 and 13 continues to rotate due to the reaction force of the injection force, the rinsing water is uniformly applied to the tableware P, and the tableware P is rinsed efficiently.

  The rinse water sprayed on the tableware P is collected in the cleaning tank 15 via the first filter 14 and mixed with the cleaning water, and is used as the cleaning water in the next cleaning step. When rinsing water is jetted into the cleaning chamber 5 and collected in the cleaning tank 15, excess cleaning water exceeding a certain water level is drained from the overflow pipe 21. For this reason, by rinsing the rinsing water into the cleaning chamber 5, the dirty cleaning water in the cleaning tank 15 is drained and replaced with relatively clean rinsing water.

  When such a rinsing process is performed for a predetermined time (about 6 seconds), the rinsing pump 34 is stopped and the rinsing process is completed. The operation in which the cleaning process for the predetermined time described above is performed once and the rinsing process for the predetermined time is performed once after the suspension state for the predetermined time is performed is a normal one-cycle operation.

  In the dishwasher 1, the microcomputer 4 changes the amount of rinsing water sprayed into the cleaning chamber 5 according to the state of contamination of the cleaning water in the cleaning tank 15. Specifically, when the cycle operation is performed a predetermined number of times, the number of rinsing steps is increased in the next cycle operation. The control by the microcomputer 4 will be described with reference to FIG.

  When the power source of the dishwasher 1 is turned on (step S1), initial hot water is supplied and the cycle operation count is set to 0 (step S2). And it waits until an operation start signal is input. When an operation start signal is input to the microcomputer 4 (YES in step S3), if the cycle operation count is 100 or less (NO in step S4), normal cycle operation is performed (step S5). That is, as a normal cycle operation, the cleaning process is performed once and the rinsing process is performed once.

  When the cycle operation count is greater than 100 (YES in step S4), an operation is performed in which the number of rinsing steps in the cycle operation is changed to two (step S6). That is, the first rinsing step is performed after the cleaning step. After the completion of the first rinsing process, when the hot water supply into the hot water storage tank 28 is completed, the second rinsing process is performed.

  After operating in step S5 or step S6, 1 is added to the count number of cycle operation (step S7), and the process returns to step S3. As described above, when the normal cycle operation is performed 100 times, the cycle operation in which the number of rinsing steps is increased to 2 is performed after the 101st cycle.

  By performing such control, the following effects are obtained. In the dishwasher 1, when the cycle operation is repeated, the washing water in the washing tank 15 becomes dirty as compared with the initial hot water supply. For this reason, if a predetermined number of cycle operations are performed, the number of rinsing steps in subsequent cycle operations is increased. As a result, the amount of rinsing water sprayed into the cleaning chamber 5 is increased in accordance with the state of cleaning water in the cleaning tank 15. Therefore, the amount of dirty cleaning water in the cleaning tank 15 replaced with relatively clean rinsing water is greater than when performing normal cycle operation. Accordingly, it is possible to keep the cleaning water in the cleaning tank 15 in a more clean state and easily suppress the dirt.

  Further, when the cycle operation is performed within the predetermined number of times, the number of rinsing steps is not increased. For this reason, the increase in running cost can be suppressed to the minimum, the cleaning water in the cleaning tank 15 can be kept in a cleaner state, and the cleaning ability can be maintained.

  Moreover, in this embodiment, after performing the washing | cleaning process and the 1st rinse process, the increase rinse process is performed, Therefore The time taken to perform a washing | cleaning process and the 1st rinse process is normal 1 No change from the cycle operation. For this reason, it does not adversely affect normal cycle operation. Therefore, it is suitable when it is desired to replace a large amount of cleaning water contaminated in the cleaning tank 15 with clean rinse water.

  Moreover, in this embodiment, it is not necessary to mount new parts and a special structure, and the cleaning water in the cleaning tank 15 can be kept in a more beautiful state and the cleaning ability can be maintained. In addition, in the cycle operation after the predetermined number of cycle operations, the number of rinsing steps is automatically increased, so that the cleaning water in the cleaning tank 15 is relatively clean without any user operation. The amount replaced with water can be automatically increased, and the cleaning water in the cleaning tank 15 can be kept in a more beautiful state.

  In the above embodiment, in the cycle operation after performing a predetermined number of cycle operations, the number of rinsing steps is increased. However, the predetermined number of times may be configured so that the user can freely set. In addition, although the number of times of the rinsing process is increased from 1 to 2, the number of times of the rinsing process is configured so that the user can freely set the number of times of the rinsing process according to the dirt of the object to be cleaned. Also good.

  Further, in the cycle operation after performing the predetermined number of cycle operations, the number of rinsing steps is increased every time, but in the cycle operation after performing the predetermined number of cycle operations, one out of two times. The number of rinsing steps may be increased during the cycle operation. Further, the number of rinsing steps may be increased each time the set number of cycle operations are performed. In this case, for example, when the cycle operation is performed 50 times, the cycle operation with the increased number of rinse steps is performed once, and then when the cycle operation is performed 50 times, the cycle operation with the increased number of rinse steps is performed once. .

  Moreover, it may replace with changing the frequency | count of a rinse process, and may change the output of a rinse pump. For example, after a predetermined number of cycle operations, the output of the rinse pump is increased in the cycle operation rinsing step. By increasing the output of the rinsing pump, the amount of rinsing water sprayed into the cleaning chamber 5 increases, so that the amount of rinsing water contaminated in the cleaning tank 15 is replaced with relatively clean rinsing water. Therefore, it is possible to keep the cleaning water in the cleaning tank 15 in a more clean state and easily suppress contamination.

  The dishwasher 1 according to the present invention can be variously modified. Hereinafter, the first to eleventh modifications will be described. In the description of the first to eleventh modifications, the differences from the above embodiment are mainly described, and descriptions (paragraphs 0036 to 0051) describing the configuration of the dishwasher with reference to FIG. 1 are omitted.

(First modification)
In the above embodiment, the amount of rinse water injected into the cleaning chamber 5 is changed by changing the number of rinsing steps in the cycle operation after the predetermined number of cycle operations. On the other hand, in the first modification, in the cycle operation after performing the predetermined number of cycle operations, the amount of rinse water injected into the cleaning chamber 5 is changed by changing the time of the rinsing process.

  As shown in FIG. 3, when the dishwasher 1 is powered on (step S11), the initial hot water supply is performed, and the cycle operation count is set to 0 (step S12). And it waits until an operation start signal is input. When the operation start signal is input to the microcomputer 4 (YES in step S13), if the cycle operation count is 100 or less (NO in step S14), normal cycle operation is performed (step S5). That is, as a normal cycle operation, the rinsing process is performed for 6 seconds after the cleaning process.

  If the cycle operation count is greater than 100 (YES in step S14), an operation is performed in which the time of the rinsing process in the cycle operation is extended (step S16). That is, after the cleaning process, the rinsing process is extended to 8 seconds.

  After performing the operation in step S15 or step S16, 1 is added to the count number of the cycle operation (step S17), and the process returns to step S13. As described above, when the normal cycle operation is performed 100 times, the cycle operation in which the time of the rinsing process is increased is performed after the 101st cycle.

  Thus, in the cycle operation after performing the predetermined number of cycle operations, the amount of the rinse water injected into the cleaning chamber 5 is increased by extending the time of the rinsing process. When the rinsing process is performed for a normal 6 seconds, the amount of rinsing water sprayed into the cleaning chamber 5 is about 2L. If the rinsing process is extended to 8 seconds, the amount of rinsing water sprayed into the cleaning chamber 5 becomes about 2.7 L, and the amount of rinsing water for about 0.7 L increases. As a result, the amount of dirty cleaning water in the cleaning tank 15 replaced with relatively clean rinsing water is larger than when performing normal cycle operation. Therefore, it is possible to keep the cleaning water in the cleaning tank 15 in a more clean state and easily suppress contamination.

  Further, when the cycle operation is performed within the predetermined number of times, the time for the rinsing process is not extended. For this reason, the increase in running cost can be suppressed to the minimum, the cleaning water in the cleaning tank 15 can be kept in a cleaner state, and the cleaning ability can be maintained.

  Moreover, in this modification, since the time of the rinsing process can be extended finely, for example, 1.2 times, 1.5 times, etc., the extension time is adjusted according to the dirt situation, and the inside of the washing tank The amount of washing water to be replaced can be adjusted.

  In addition, since the rinsing process is performed once after the cleaning process, the cleaning water in the cleaning tank 15 can be kept clean without giving the user a sense of incongruity because there is no difference from the normal cycle operation. it can.

  Moreover, in this modification, it is not necessary to mount a new part and a special structure, and the cleaning water in the cleaning tank 15 can be kept in a more beautiful state and the cleaning ability can be maintained. Further, in the cycle operation after the predetermined number of cycle operations, the time for the rinsing process is automatically extended, so that the cleaning water in the cleaning tank 15 is relatively clean without any operation by the user. Automatically increase the amount of rinsing water. For this reason, the cleaning water in the cleaning tank 15 can be kept in a more beautiful state.

  In the above description, in the cycle operation after performing a predetermined number of cycle operations, the time of the rinsing process is extended. However, the user may freely set the predetermined number of times. In addition, the time for the rinsing process is increased from 6 seconds to 8 seconds, but the time for the rinsing process to be increased is configured so that the user can freely set according to the contamination of the object to be cleaned. Also good.

  Further, in the cycle operation after performing the predetermined number of cycle operations, the time of the rinsing process is extended every time. However, in the cycle operation after performing the predetermined number of cycle operations, one out of two times. You may make it extend the time of a rinse process at the time of a cycle operation. Further, the time for the rinsing process may be extended each time the set number of cycle operations are performed. In this case, for example, if the cycle operation is performed 50 times, the cycle operation in which the time of the rinsing process is extended is performed once, and then if the cycle operation is performed 50 times, the cycle operation in which the time of the rinse process is extended is performed once. .

(Second modification)
As shown in FIG. 4, the dishwasher according to the second modification includes an overflow pipe 50 and a second filter 51 instead of the overflow pipe 21 and the second filter 18. The second filter 51 is formed in a mesh shape, and has a cylindrical portion 51a formed of sheet metal and having an upper end 51b opened. The cylindrical overflow pipe 50 penetrates the cylindrical part 51 a of the second filter 51, the opened upper end 50 a is located in the cleaning tank 15, and the lower end part is fitted into the water distribution pipe 20. For this reason, the double pipe 52 is constituted by the overflow pipe 50 and the cylindrical portion 51 a of the second filter 51. The overflow pipe 50 is formed with a discharge hole 50 b on the upper end 50 a side, and the position of the upper end 50 a is lower than the upper end 51 b of the cylindrical portion 51 a of the second filter 51.

  Thus, in the dishwasher provided with the double pipe 52, the microcomputer 4 performs the control shown in FIG. As shown in FIG. 5, when the power of the dishwasher 1 is turned on (step S21), initial hot water supply is performed, and the cycle operation count is set to 0 (step S22). And it waits until an operation start signal is input. When the operation start signal is input to the microcomputer 4 (YES in step S23), when the cycle operation count is 100 or less (NO in step S24), normal cycle operation is performed (step S25). That is, as a normal cycle operation, the rinsing process is performed for 6 seconds after the cleaning process.

  If the cycle operation count is greater than 100 (YES in step S24), an operation is performed in which the time of the rinsing process in the cycle operation is extended (step S26). That is, after the cleaning process, the rinsing process is extended to 8 seconds. In this rinsing process, the rinsing pump 34 is driven with an output lower than the output when not extending for the extension time.

  After performing the operation in step S25 or step S26, 1 is added to the count number of the cycle operation (step S27), and the process returns to step S23. As described above, when the normal cycle operation is performed 100 times, the cycle operation in which the time of the rinsing process is increased is performed after the 101st cycle.

  In the rinsing process after the 101st cycle operation (step S26), by changing the timing of lowering the output of the rinsing pump 34, the oil accumulated in the upper part in the cleaning tank 15 is positively discharged, and the lower part It is possible to drain the washing water in the washing tank 15 by selecting either the case of positively discharging the sediment accumulated in the washing tank 15. This point will be described with reference to FIGS.

  First, with reference to FIG. 6, the case where it controls so that the oil component accumulated in the upper part in the washing tank 15 is drained actively is demonstrated. As shown in FIG. 6, in the 101st and subsequent cycle operations, the cleaning process is performed as usual (step S31), and then the normal rinsing process is performed for 6 seconds (step S32), followed by the extension for 2 seconds. Rinse at a low output (step S33). By this control, the cleaning water in the cleaning tank 15 can be drained as follows.

  In step 32, if the rinse pump 34 is operated for 6 seconds, the water level in the cleaning tank 15 rises and exceeds the high water level L2. The high water level L2 is a water level at the height of the upper end 51b of the cylindrical portion 51a of the second filter 51 and is higher than the upper end 50a of the overflow pipe 50. In this case, mainly the washing water in the upper part of the washing tank 15 flows into the overflow pipe 50 from the opening of the upper end 50a of the overflow pipe 50 (arrow Y1 in FIG. 4) and is drained. In the washing tank 15, the oil easily collects in the upper part, so the washing water containing a large amount of oil is mainly drained.

  Subsequently, in step S33, when the rinse pump 34 is operated at a low output for 2 seconds, the water level in the cleaning tank 15 is kept higher than the high water level L2 during that time, and the cleaning water containing a large amount of oil is mainly discharged. Is done. Then, when the operation of the rinsing pump 34 is completed, the level of the cleaning water in the cleaning tank 15 decreases and becomes lower than the high water level L2. Then, mainly, the cleaning water in the drop portion 19 located at the bottom of the cleaning tank 15 flows into the overflow pipe 50 from the discharge hole 50b of the overflow pipe 50 (arrow Y2 in FIG. 4) and is drained. Since sediment is accumulated at the bottom of the washing tank 15, this sediment is mainly discharged.

  When the water level in the cleaning tank 15 reaches the reference water level L1 at the height of the discharge hole 50b of the overflow pipe 50, the drainage is finished. As described above, if the time of the rinsing process is extended and the output of the rinsing pump 34 is lowered by the extended time at the end of the rinsing process, the oil content in the cleaning tank 15 is more than that in the case where the rinsing process is performed at the normal time and output. Can discharge more.

  Next, with reference to FIG. 7, the case where it controls so that the sediment accumulated in the lower part in the washing tank 15 is discharged | emitted actively is demonstrated. As shown in FIG. 7, in the cycle operation after the 101st time, the cleaning process is performed as usual (step S41), and thereafter, the rinsing process is performed with a low output for 2 seconds (step S42). The rinsing process is performed with normal output for 6 seconds (step S43).

  As described above, when the rinse pump 34 is operated at a low output for 2 seconds in step S42, the water level in the washing tank 15 does not rise so much during this period, and is kept lower than the high water level L2. Wash water in the drop portion 19 located at the bottom of the tank 15 flows into the overflow pipe 50 from the discharge hole 50b of the overflow pipe 50 (arrow Y2 in FIG. 4) and is drained. That is, the precipitate is mainly discharged.

  Subsequently, in step S43, when the rinse pump 34 is operated at a normal output for 6 seconds, the water level in the cleaning tank 15 rises and exceeds the high water level L2. In this case, mainly the washing water in the upper part of the washing tank 15 flows into the overflow pipe 50 from the opening of the upper end 50a of the overflow pipe 50 (arrow Y1 in FIG. 4) and is drained. That is, washing water containing a large amount of oil is mainly drained.

  When the rinsing process is completed and the driving of the rinsing pump 34 is stopped, the water level in the cleaning tank 15 decreases and becomes lower than the high water level L2. Then, mainly, the cleaning water in the drop portion 19 located at the bottom of the cleaning tank 15 flows into the overflow pipe 50 from the discharge hole 50b of the overflow pipe 50 (arrow Y2 in FIG. 4) and is drained. That is, the precipitate is mainly discharged again.

  When the water level in the cleaning tank 15 reaches the reference water level L1 at the height of the discharge hole 50b of the overflow pipe 50, the drainage is finished. As described above, if the time of the rinsing process is extended and the output of the rinsing pump 34 is reduced at the beginning of the rinsing process by the extended time, the bottom of the washing tank 15 is removed from the case where the rinsing process is performed at the normal time and output. A lot of sediment can be discharged.

  As described above, in the rinsing process in the 101st and subsequent cycle operations, when the timing for reducing the output of the rinsing pump 34 is set at the end of the rinsing process, the oil accumulated in the upper portion of the cleaning tank 15 is actively drained. Can be controlled. When the timing for reducing the output of the rinsing pump 34 is set to the beginning of the rinsing process, the sediment accumulated in the lower portion can be positively discharged. In other words, by changing the timing at which the output of the rinsing pump 34 is lowered, it is controlled whether the oil accumulated in the upper part of the cleaning tank 15 is positively discharged or the sediment accumulated in the lower part is positively discharged. can do.

  Further, by reducing the output of the rinsing pump 34, the increase in power consumption and the amount of rinsing water can be suppressed, and the cleaning water in the cleaning tank 15 can be kept in a clean state, and contamination can be easily suppressed. . Further, while the output of the rinsing pump 34 is being reduced, the stirring of the cleaning water in the cleaning tank 15 is suppressed, so that oil and precipitates can be effectively discharged.

  In the above description, the overflow pipe 50 is formed with two holes, the opening of the upper end 50a and the discharge hole 50b formed on the upper end 50a side, as holes for draining the cleaning water. On the other hand, the overflow pipe 21 and the cylindrical portion are formed even when only the inflow hole at the upper end is formed as a hole for draining the washing water as in the overflow pipe 21 shown in FIG. By forming a double pipe with 18a, it is possible to selectively discharge the oil and the precipitate as described above.

  In the above description, in the cycle operation after performing a predetermined number of cycle operations, the time of the rinsing process is extended. However, the user may freely set the predetermined number of times. In addition, the time for the rinsing process is increased from 6 seconds to 8 seconds, but the time for the rinsing process to be increased is configured so that the user can freely set according to the contamination of the object to be cleaned. Also good.

  Further, in the cycle operation after performing the predetermined number of cycle operations, the time of the rinsing process is extended every time. However, in the cycle operation after performing the predetermined number of cycle operations, one out of two times. You may make it extend the time of a rinse process at the time of a cycle operation. Further, the time for the rinsing process may be extended each time the set number of cycle operations are performed. In this case, for example, if the cycle operation is performed 50 times, the cycle operation in which the time of the rinsing process is extended is performed once. Similarly, if the cycle operation of 50 times is performed next, the cycle operation in which the time of the rinse process is extended is performed. Perform once.

(Third Modification)
In the dishwasher according to the third modified example, the above-described double pipe 52 is provided, and in the cycle operation after a predetermined number of cycle operations, the time of the rinsing process is changed, and further, the washing process and the rinsing process Extend the downtime between.

  As shown in FIG. 8, control by the microcomputer 4 is performed. When the power of the dishwasher 1 is turned on (step S51), initial hot water supply is performed, and the cycle operation count is set to 0 (step S52). And it waits until an operation start signal is input. When an operation start signal is input to the microcomputer 4 (YES in step S53), if the cycle operation count is 100 or less (NO in step S54), normal cycle operation is performed (steps S55 to S57), that is, normal As the cycle operation, a cleaning process is performed (step S55), a normal rest time of about 5 seconds is passed between the cleaning process and the rinsing process (step S56), and the rinsing process is performed for a normal 6 seconds (step S57). .

  If the cycle operation count is greater than 100 (YES in step S54), an operation is performed in which the pause time in the cycle operation and the time of the rinsing process are extended (steps S58 to S60). That is, a cleaning process is performed (step S58), a pause time extended to about 10 seconds between the cleaning process and the rinsing process (step S59), and the rinsing process is extended for about 8 seconds (step S60).

  After the end of the cycle operation, 1 is added to the count number of the cycle operation (step S61), and the process returns to step S53. As described above, when the normal cycle operation is performed 100 times, the cycle operation in which the time of the rinsing process and the pause time are extended is performed after the 101st time.

  Thus, in the cycle operation after performing a predetermined number of cycle operations, the following effects are obtained by extending the pause time. In the cleaning process, since the cleaning water in the cleaning tank 15 is circulated by the cleaning pump 23 and sprayed into the cleaning chamber 5, the cleaning water in the cleaning tank 15 is agitated. That is, during the cleaning process, oil and precipitate are mixed in the cleaning tank 15.

  By extending the downtime between the washing process and the rinsing process, after the washing process, the oil content is accumulated in the upper part and the precipitate is accumulated in the lower part in the washing tank 15. By performing the rinsing process thereafter, the water level in the washing tank 15 exceeds the high water level L2 during the rinsing process, and the oil in the upper part is easily discharged. After the rinsing process is finished, the water level in the washing tank 15 is high. When the water level falls below the level L2, the lower sediments are easily discharged.

  In this manner, by extending the downtime, the oil component is accumulated in the upper portion in the washing tank 15 and the sediment is accumulated in the bottom portion. Therefore, in the rinsing step, the oil component in the upper portion or the lower portion in the washing tank 15 is accumulated. A thing can be actively discharged, and the effect of the double pipe 52 can be fully exhibited. Therefore, the cleaning water can be efficiently replaced, the cleaning water in the cleaning tank 15 can be kept clean, and the cleaning ability can be maintained.

  Further, when the cycle operation is performed within the predetermined number of times, the pause time is not extended. For this reason, within the predetermined number of times, it is possible to prevent an increase in the time required for one cycle operation, and to suppress a decrease in the number of cycles of the daily cycle operation. Therefore, it is possible to suppress a decrease in the number of daily dish washing processes.

  Moreover, in this modification, it is not necessary to mount a new part and a special structure, and the cleaning water in the cleaning tank 15 can be kept in a more beautiful state and the cleaning ability can be maintained. Further, in the cycle operation after performing the predetermined number of cycle operations, the time for the rinsing process and the suspension time are automatically extended, so that the cleaning water in the cleaning tank 15 is not required to be operated by the user. The amount of replacement with relatively clean rinse water can be automatically increased. Also, oil or precipitate can be discharged efficiently. Therefore, the cleaning water in the cleaning tank 15 can be kept in a cleaner state.

  In the above, in the cycle operation after performing a predetermined number of cycle operations, the rinsing process and the time and the suspension time are extended, but the user can freely set the predetermined number of times. Also good. In addition, the resting time is increased from 5 seconds to 10 seconds. However, it may be configured such that the user can freely set the time for the increasing rinsing process according to the contamination of the object to be cleaned. .

  Further, in the cycle operation after performing the predetermined number of cycle operations, the time of the rinsing process and the pause time are extended each time. In the cycle operation after performing the predetermined number of cycle operations, out of two times You may make it extend the time of a rinsing process and rest time at the time of one cycle driving | operation. Further, each time the set number of cycle operations are performed, the time of the rinsing process and the pause time may be extended. In this case, for example, when the cycle operation is performed 50 times, the cycle operation with the extended rinsing process time and the pause time is performed once, and similarly, when the cycle operation is performed 50 times, the rinsing process time and the pause time are performed. Cycle operation is extended once.

(Fourth modification)
In the third modified example, when the cycle operation is performed a predetermined number of times, in the next cycle operation, the time of the rinsing process and the pause time are extended, but only the pause time may be extended. In the dishwasher according to the fourth modified example, the microcomputer 4 changes the suspension time between the cleaning process and the rinsing process according to the contamination of the cleaning water in the cleaning tank 15. More specifically, when a predetermined number of cycle operations are performed, when the next cycle operation is performed, the pause time between the cleaning process and the rinsing process is extended from the predetermined number of cycle operations.

  As shown in FIG. 9, when the dishwasher 1 is powered on (step S71), the initial hot water supply is performed, and the cycle operation count is set to 0 (step S72). And it waits until an operation start signal is input. When the operation start signal is input to the microcomputer 4 (YES in step S73), when the cycle operation count is 100 or less (NO in step S74), normal cycle operation is performed (step S75). In other words, the pause time is about 5 seconds as usual.

  When the cycle operation count is greater than 100 (YES in step S74), an operation is performed in which the time of the rinsing process in the cycle operation is extended (step S76). That is, the pause time is extended to 10 seconds. After performing the cycle operation in step S75 or step S76, 1 is added to the count number of the cycle operation (step S77), and the process returns to step S73. As described above, when the normal cycle operation is performed 100 times, the cycle operation with the extended rest time is performed after the 101st operation.

  For this reason, the washing water stirred during the washing step extends the rest time, so that the oil is accumulated at the top and the precipitate is accumulated at the bottom in the washing tank 15. By performing a rinse process after that, it is easy to discharge | release the oil component accumulated on the upper part, or the deposit accumulated on the bottom part. For this reason, it is possible to keep the cleaning water in the cleaning tank in a more clean state and easily suppress dirt. In particular, by providing the double pipe 52, the upper oil content or the lower sediment in the washing tank 15 can be positively discharged.

  Further, when the cycle operation is performed within the predetermined number of times, the pause time is not extended. For this reason, within the predetermined number of times, it is possible to prevent an increase in the time required for one cycle operation, and to suppress a decrease in the number of cycles of the daily cycle operation. Therefore, it is possible to suppress a decrease in the number of daily dish washing processes.

  Moreover, in this modification, it is not necessary to mount a new part and a special structure, and the cleaning water in the cleaning tank 15 can be kept in a more beautiful state and the cleaning ability can be maintained. In addition, in the cycle operation after performing a predetermined number of cycle operations, since the pause time is automatically extended, the oil or sediment is efficiently discharged without the user's operation. The cleaning water in the cleaning tank 15 can be kept in a cleaner state.

  In the above description, the pause time is extended in the cycle operation after the predetermined number of cycle operations. However, the user may freely set the predetermined number of times. In addition, the resting time is increased from 5 seconds to 10 seconds, but the time for the rinsing process to be increased may be configured so that the user can freely set according to the dirt of the object to be cleaned. Good.

  In addition, in the cycle operation after performing the predetermined number of cycle operations, the pause time is extended every time, but in the cycle operation after performing the predetermined number of cycle operations, one of the two cycle operations Sometimes the pause time may be extended. Further, the pause time may be extended each time the set number of cycle operations are performed. In this case, for example, when the cycle operation is performed 50 times, the cycle operation with the extended pause time is performed once. Similarly, when the cycle operation is performed 50 times, the cycle operation with the extended pause time is performed once.

(5th modification)
In the above embodiment, in the cycle operation after performing a predetermined number of cycle operations, the amount of rinse water injected into the cleaning chamber 5 is changed by changing the number of rinsing steps, but in the fifth modification example, In the cycle operation after performing a predetermined number of cycle operations, the amount of rinse water injected into the cleaning chamber 5 is increased by driving the rinse pump 34 during the cleaning process. The operation in this case will be described.

  As shown in FIG. 10, when the power of the dishwasher 1 is turned on (step S81), the initial hot water supply is performed, and the cycle operation count is set to 0 (step S82). And it waits until an operation start signal is input. When the operation start signal is input to the microcomputer 4 (YES in step S83), if the cycle operation count is 100 or less (NO in step S84), normal cycle operation is performed (step S85). That is, as a normal cycle operation, only the cleaning pump 23 is driven to perform the cleaning process, and only the rinsing pump 34 is driven to perform the rinsing process.

  If the cycle operation count is greater than 100 (YES in step S84), in the cycle operation, both the cleaning pump 23 and the rinse pump 34 are driven to perform the cleaning process, and only the rinse pump 34 is driven. A rinsing step is performed.

  After performing the cycle operation in step S85 or step S86, 1 is added to the count number of the cycle operation (step S87), and the process returns to step S83. As described above, when the normal cycle operation is performed 100 times, the cycle operation in which not only the cleaning pump 23 but also the rinse pump 34 is driven during the cleaning process after the 101st time is performed.

  Thus, by driving the rinse pump 34 during the cleaning process, the amount of rinse water injected into the cleaning chamber 5 increases. For this reason, the replacement amount in which the dirty cleaning water in the cleaning tank 15 is replaced with relatively clean rinse water increases. Therefore, it is possible to keep the cleaning water in the cleaning tank 15 in a more clean state and easily suppress contamination.

  In addition, the cleaning water in the cleaning tank can be kept in a clean state without increasing the time required for one cycle operation. Further, when the cycle operation is performed within the predetermined number of times, the rinse pump 34 is not driven during the cleaning process. For this reason, the increase in the running cost concerning power consumption and water consumption can be suppressed to the minimum, the washing water in the washing tank 15 can be kept in a more beautiful state, and the washing ability can be maintained.

  Moreover, in this modification, it is not necessary to mount a new part and a special structure, and the cleaning water in the cleaning tank 15 can be kept in a more beautiful state and the cleaning ability can be maintained. Further, since the rinsing pump 34 is automatically driven during the cleaning process in the cycle operation after the predetermined number of times, the cleaning water in the cleaning tank 15 is replaced with relatively clean rinsing water without the user's operation. By automatically increasing the amount, the cleaning water in the cleaning tank 15 can be kept in a cleaner state.

  In the above description, in the cycle operation after the predetermined number of cycle operations, the rinse pump 34 is driven during the cleaning process. However, the user may freely set the predetermined number of times. . Moreover, you may comprise so that a user can set freely about the drive time of the rinse pump 34 in a washing | cleaning process. By increasing the drive time of the rinse pump 34 during the cleaning process, it is possible to increase the amount of rinse water sprayed into the cleaning chamber 5.

  Further, in the cycle operation after performing the predetermined number of cycle operations, the rinsing pump 34 is driven every time during the cleaning process, but in the cycle operation after performing the predetermined number of cycle operations, out of two times The rinse pump 34 may be driven during the cleaning process in one cycle operation. Further, the rinse pump 34 may be driven during the cleaning process every time the set number of cycle operations are performed. In this case, for example, if the cycle operation is performed 50 times, the cycle operation in which the rinse pump 34 is driven is performed once during the cleaning process. Similarly, if the cycle operation is performed 50 times next, the rinse pump 34 is performed during the cleaning process. The cycle operation that drives is performed once.

  In addition, when the cycle operation is performed a predetermined number of times or more and the temperature of the rinse water in the hot water storage tank 28 is equal to or higher than the set temperature, the rinse pump 34 may be controlled to be driven during the cleaning process. As a result, the rinse water in the hot water storage tank 28 is frequently used in one cycle operation, so that the rinsing process in the hot water storage tank 28 is not in time and the rinsing process is performed below the set temperature. Can be prevented.

  Further, the cleaning process may be extended for a certain time. Alternatively, the cleaning process may be automatically extended until the rinse water in the hot water storage tank 28 reaches a set temperature or higher. As a result, it is possible to prevent the rinsing process from being performed at a temperature equal to or lower than the set temperature without the temperature rise of the rinse water in the hot water storage tank 28 being in time.

  In the above description, the rinsing pump 34 is driven simultaneously with the cleaning pump 23 during the cleaning process. However, the rinsing pump 34 may be driven before the cleaning pump 23 is driven. In this case, the rinsing pump 34 is driven at the beginning of the cycle operation, and then the washing pump 23 is driven to clean the dishes, and then the rinsing pump 34 is driven to rinse the dishes. Immediately before the start of the cycle operation, immediately after the cleaning step, the oil component is accumulated in the upper portion and the precipitate is accumulated in the bottom portion in the cleaning tank 15. For this reason, by driving the rinsing pump 34 at the beginning of the cycle operation, it is easy to discharge the oil accumulated at the top or the sediment accumulated at the bottom. Therefore, it is possible to keep the cleaning water in the cleaning tank in a more clean state and easily suppress contamination. In particular, by providing the double pipe 52, the upper oil content or the lower sediment in the washing tank 15 can be positively discharged.

(Sixth Modification)
In the above embodiment, the amount of rinse water injected into the cleaning chamber 5 is changed by changing the number of rinsing steps in the cycle operation after the predetermined number of cycle operations. On the other hand, in the sixth modified example, in the cycle operation after the predetermined number of cycle operations, the rinsing pump 34 is driven after a predetermined time from the end of the cycle operation to inject into the cleaning chamber 5. Increase the amount of rinse water to be rinsed. The operation in this case will be described.

  As shown in FIG. 11, when the power of the dishwasher 1 is turned on (step S91), initial hot water supply is performed and the count number of cycle operation is set to 0 (step S92). And it waits until an operation start signal is input. When an operation start signal is input to the microcomputer 4 (YES in step S93), normal cycle operation is performed (step S94), and 1 is added to the count number of cycle operation (step S95).

  If the count number of the cycle operation is 100 or less (NO in step S96), the process returns to step S93 and waits until the operation start signal is input again. If the cycle operation count is greater than 100 (YES in step S96), the rinsing pump 34 is driven for 30 seconds after a predetermined time (step S97).

  Thus, by driving the rinse pump separately from the cycle operation, the amount of rinse water injected into the cleaning chamber increases. For this reason, the replacement amount in which the dirty cleaning water in the cleaning tank 15 is replaced with relatively clean rinse water increases.

  Also, during the rinsing process, the rinsing water sprayed into the cleaning chamber is collected in the cleaning tank 15 and the cleaning water in the cleaning tank 15 is somewhat stirred, but not as much as during the cleaning process. Then, after a lapse of time from the end of the cycle operation, in the washing tank 15, the oil component floats on the top and the sediment accumulates on the bottom. In this way, it is easy to drain cleaning water containing a large amount of dirt by driving the rinse pump in a state where dirt is accumulated in the upper part and the lower part. For this reason, it is possible to keep the cleaning water in the cleaning tank in a more clean state and easily suppress dirt. In particular, by providing the double pipe 52, the upper oil content or the lower sediment in the cleaning tank 15 can be positively discharged, so that the cleaning water can be replaced efficiently.

  Further, since the rinsing pump is driven after the cycle operation is completed, the cleaning water contaminated in the cleaning tank can be replaced with relatively clean rinsing water without hindering the cycle operation itself.

  In addition, when the cycle operation is performed within the predetermined number of times, the rinse pump 34 is not driven after a predetermined time of the cycle operation. For this reason, the increase in the running cost concerning power consumption and water consumption can be suppressed to the minimum, the washing water in the washing tank 15 can be kept in a more beautiful state, and the washing ability can be maintained.

  Moreover, in this modification, it is not necessary to mount a new part and a special structure, and the cleaning water in the cleaning tank 15 can be kept in a more beautiful state and the cleaning ability can be maintained. Further, in the cycle operation after the predetermined number of cycle operations, the rinse pump 34 is automatically driven after a predetermined time of the cycle operation, so that the cleaning in the cleaning tank 15 can be performed without the user's operation. The amount of water that is replaced with relatively clean rinse water is automatically increased, so that the cleaning water in the cleaning tank 15 can be kept in a cleaner state.

  In addition, in the cycle operation after performing a predetermined number of cycle operations, when the interval until the start of the cycle operation performed immediately before is vacant for a predetermined time or more, a predetermined time after the cycle operation performed immediately before is completed. The rinse pump 34 may be driven later. For example, when the predetermined number of times is 100, when the time from the start of the 100th cycle operation to the start of the 101st cycle operation is a predetermined time (10 minutes) or more, the 101st cycle operation is completed. The rinse pump 34 is automatically driven after a predetermined time (30 seconds).

  When the time from the start of the 100th cycle operation to the start of the 101st cycle operation is less than the predetermined time (10 minutes), the cleaning tank is used until the interval until the cycle operation starts is equal to or longer than the predetermined time (10 minutes). The rinsing pump 34 is not driven to clean the inside 15. When the interval until the cycle operation starts becomes equal to or longer than a predetermined time (10 minutes), the rinse pump 34 is automatically driven after a predetermined time (30 seconds) after the end of the cycle operation.

  In this case, when the dishwasher 1 is frequently used, the rinse pump 34 for cleaning the inside of the washing tank 15 is not driven even after a predetermined number of cycle operations. When the dishwasher 1 is not used frequently and the interval is long, the rinse pump 34 can be driven. Therefore, the cleaning operation is not hindered.

(Seventh Modification)
In the sixth modification, in the cycle operation after performing the predetermined number of cycle operations, the rinse water jetted into the cleaning chamber 5 is driven by driving the rinse pump 34 a predetermined time after the cycle operation is completed. Increased the amount. In the dishwasher 1 according to the seventh modification, in the cycle operation after performing the predetermined number of cycle operations, when the rinse pump 34 is driven after a predetermined time from the end of the cycle operation, it is lower than in the rinse step. The rinse pump 34 is driven by the output. The operation in this case will be described.

  As shown in FIG. 12, when the power of the dishwasher 1 is turned on (step S101), initial hot water supply is performed, and the cycle operation count is set to 0 (step S102). And it waits until an operation start signal is input. When an operation start signal is input to the microcomputer 4 (YES in step S103), normal cycle operation is performed (step S104), and 1 is added to the count number of cycle operation (step S105).

  When the cycle operation count is 100 or less (NO in step S106), the process returns to step S103 and waits until the operation start signal is input again. When the cycle operation count is larger than 100 (YES in step S106), the rinsing pump 34 is driven at a lower output than during the rinsing process, for example, for about 30 seconds after a predetermined time (step S107). For example, the rinsing pump 34 is driven at an output of 30% to 50% of the output during the rinsing process. Further, for example, the rinse pump 34 is driven with a low output that does not rotate the upper rinse nozzle 11 and the lower rinse nozzle 13.

  Thus, by driving the rinse pump at a low output separately from the cycle operation, the following effects can be obtained in addition to the effects obtained when the control according to the sixth modified example is performed. By driving the rinsing pump at a low output, stirring of the washing water in the washing tank 15 is suppressed, so that drainage is performed in a state where oil is accumulated at the top and sediment is accumulated at the bottom in the washing tank 15. Can do. For this reason, oil and sediment can be discharged efficiently.

  Further, for example, the rinsing pump 34 is driven with a low output so that the rinsing water is not ejected from the upper rinsing nozzle 11 and the rinsing water flows only from the lower rinsing nozzle 13. In this case, since the rinsing water sprayed from the lower rinsing nozzle 13 does not hit the tableware P, the drying of the tableware P can be prevented.

(Eighth modification)
As shown in FIG. 13, the dishwasher 1A according to the eighth modification includes an operation panel 61 provided with a washing water replacement switch 62. The cleaning water replacement switch 62 receives a setting for changing the amount of rinsing water sprayed into the cleaning chamber 5. In the dishwasher 1 </ b> A, when the setting for changing the amount of rinse water sprayed into the cleaning chamber 5 is received by the cleaning water replacement switch 62, the amount of rinse water sprayed into the cleaning chamber 5 is changed. Specifically, the amount of the rinsing water injected into the cleaning chamber 5 is increased by extending the time of the rinsing process in the cycle operation.

  As shown in FIG. 14, when the power of the dishwasher 1A is turned on (step S111), the initial hot water supply is performed and the apparatus waits until an operation start signal is input. When an operation start signal is input to the microcomputer 4 (YES in step S112), if the cleaning water replacement switch 62 is OFF (OFF in step S113), normal cycle operation is performed (step S114). That is, as a normal cycle operation, the rinsing process is performed for 6 seconds after the cleaning process.

  On the other hand, when the washing water replacement switch 62 is ON (ON in step S113), an operation is performed in which the time of the rinsing process in the cycle operation is extended (step S115). That is, after the cleaning process, the rinsing process is extended to 8 seconds. After the cycle operation ends (step S116), the process returns to step S112.

  By controlling in this way, when the user notices that the cleaning water in the cleaning tank 15 is dirty, the amount of rinsing water to be injected into the cleaning chamber 5 is controlled by operating the cleaning water replacement switch 62. Can be increased. Therefore, the cleaning water in the cleaning tank can be surely kept in a clean state.

  The washing water replacement switch 62 may be used as another operation switch or a dedicated switch. In addition to the cleaning water replacement switch 62, a separate start switch for accepting the start of the cycle operation is provided. When the user operates the cleaning water replacement switch 62 to be turned on, the subsequent cycle operation is performed by the cleaning water replacement switch. The rinsing process may be extended until 62 becomes OFF. Moreover, you may make it extend the rinse process of the cycle driving | running of the predetermined number of times after that (for example, 5 times). Further, when the user operates the washing water replacement switch 62 to be turned on, it may be automatically turned off after a predetermined time or after a predetermined number of cycle operations. In addition, a start switch for accepting the start of the cycle operation and the cleaning water replacement switch 62 may be provided, and when the cleaning water replacement switch 62 is operated, the cycle operation may be performed in which the time of the rinsing process is extended.

  In the eighth modified example, when the setting for changing the amount of rinse water is received by the cleaning water replacement switch 62, the amount of rinse water injected into the cleaning chamber 5 is changed by extending the time of the cleaning process. Not limited to this. The number of rinsing steps in cycle operation may be increased. The rinsing pump 34 may be driven during the cleaning process in the cycle operation. The rinse pump 34 may be driven after a predetermined time from the end of the cycle operation.

  Further, in addition to the washing water replacement switch 62, a switch that accepts a setting for changing the pause time may be provided. In this case, when the setting for changing the pause time is received by the switch, the microcomputer 4 changes the pause time of the next cycle operation to be performed. In this case, when the user notices that the cleaning water in the cleaning tank 15 is dirty, the user can operate the switch to extend the downtime between the cleaning process and the rinsing process. Therefore, the rinsing process is performed more reliably in a state where the oil component floats on the upper part and the sediment accumulates on the bottom part in the washing tank. For this reason, it is easy to drain cleaning water containing a lot of dirt. Therefore, the cleaning water in the cleaning tank can be kept in a cleaner state. In particular, when the user notices that the cleaning water in the cleaning tank 15 is dirty, by turning on both the cleaning water replacement switch 62 and the switch for accepting the setting for changing the pause time, The downtime and the time for the rinsing process are extended.

  Further, instead of the washing water replacement switch 62, a switch for receiving a setting for changing the pause time may be provided. In this case, the microcomputer 4 changes the pause time when the setting for changing the pause time is received by the switch. In this case, when the user notices that the cleaning water in the cleaning tank 15 is dirty, the user can operate the switch to extend the downtime between the cleaning process and the rinsing process. Therefore, the rinsing process is performed more reliably in a state where the oil component floats on the upper part and the sediment accumulates on the bottom part in the washing tank. For this reason, it is easy to drain cleaning water containing a lot of dirt. Therefore, the cleaning water in the cleaning tank can be kept in a cleaner state. In particular, the dishwasher 1 </ b> A includes the double pipe 52, whereby the upper oil content or the lower sediment in the cleaning tank 15 can be positively discharged.

(Ninth Modification)
In the above embodiment and the first to eighth modifications, the cleaning operation is performed when a predetermined number of cycle operations are performed in order to change the amount of the rinsing water sprayed into the cleaning chamber 5 in accordance with the dirt in the cleaning tank 15 The amount of rinse water sprayed into the chamber 5 was increased. In place of this, in the dishwasher 1B shown in FIG. 15, in order to perform control according to the dirt in the washing tank 15, a dirt detection sensor 63 that detects the dirt status of the washing water in the washing tank 15 is provided. The microcomputer 4 increases the amount of rinse water sprayed into the cleaning chamber 5 when the dirt measured by the dirt detection sensor 63 is equal to or greater than a predetermined value.

  The contamination detection sensor 63 is disposed in the cleaning tank 15 and measures the degree of contamination of the cleaning water in the cleaning tank 15. As the dirt detection sensor 63, for example, an optical sensor that measures the transparency of cleaning water, an electric sensor that measures the electrical conductivity of cleaning water, or the like can be used. The microcomputer 4 performs the following control based on the measurement value input from the dirt detection sensor 63.

  As shown in FIG. 16, when the power of the dishwasher 1B is turned on (step S121), initial hot water supply is performed and the apparatus waits until an operation start signal is input. When an operation start signal is input to the microcomputer 4 (YES in step S122), if the measured value input from the dirt detection sensor 63 is less than a predetermined value (NO in step S123), normal cycle operation is performed (step S123). S124). That is, as a normal cycle operation, the rinsing process is performed for 6 seconds after the cleaning process.

  On the other hand, when the measured value input from the dirt detection sensor 63 is equal to or greater than the predetermined value (YES in step S123), an operation in which the time of the rinsing process in the cycle operation is extended is performed (step S125). That is, after the cleaning process, the rinsing process is extended to 8 seconds. Then, after the cycle operation ends (step S126), the process returns to step S122.

  By controlling in this way, when the cleaning water in the cleaning tank 15 becomes very dirty, the time of the rinsing process in the cycle operation is extended, so that the amount of rinsing water injected into the cleaning chamber 5 can be increased. For this reason, it is possible to efficiently replace the cleaning water contaminated in the cleaning tank 15 with relatively clean rinsing water, keep the cleaning water in the cleaning tank 15 in a more clean state, and suppress contamination.

  Further, when the measured value of the dirt detection sensor 63 is less than a predetermined value, the time of the rinsing process in the cycle operation is not extended. For this reason, the increase in the running cost concerning power consumption and water consumption can be suppressed to the minimum, the washing water in the washing tank 15 can be kept in a more beautiful state, and the washing ability can be maintained.

  Further, when the measured value by the dirt detection sensor 63 is equal to or greater than a predetermined value, the time for the rinsing process is extended, so that it is automatically performed according to the dirt of the washing water in the washing tank 15 without the user's operation. By increasing the amount of the cleaning water in the cleaning tank 15 replaced with relatively clean rinsing water, the cleaning water in the cleaning tank 15 can be kept in a cleaner state.

  In the above description, the rinsing process is extended from the normal 6 seconds to 8 seconds. However, the user may be able to set the rinsing process according to the contamination status of the object to be cleaned. In addition, after the dirt detection sensor 63 detects dirt of a predetermined value or more, the time of the rinsing process may be extended in all cycle operations. In addition, after the dirt detection sensor 63 detects dirt of a predetermined value or more, the time of the rinsing process may be extended in the cycle operation every predetermined number of times.

  Further, after the dirt detection sensor 63 detects dirt of a predetermined value or more, the time of the rinsing process may be extended in a predetermined number of cycles (for example, five times). In this case, after the dirt detection sensor 63 detects the dirt of a predetermined value or more, the dirt of the cleaning water in the cleaning tank 15 drops below the predetermined value when, for example, two (less than a predetermined number) cycle operations are completed. Even in such a case, the cleaning water in the cleaning tank 15 can be sufficiently replaced with relatively clean rinsing water by extending the rinsing process time for the cycle operation continuously for a predetermined number of times.

  Further, a plurality of predetermined values to be compared with the measured values by the dirt detection sensor 63 may be set. For example, a first predetermined value, a second predetermined value indicating that the degree of contamination is larger than the first predetermined value, and a second predetermined value that is greater than or equal to the first predetermined value measured by the contamination detection sensor 63 are set. If it is less than that, the time of the rinsing process of the cycle operation is extended by 2 seconds, for example. You may make it do.

  Further, the timing at which the microcomputer 4 inputs the measurement value of the dirt detection sensor 63 may be after the end of the cycle operation. In that case, the time of the rinsing process of the next cycle operation is changed based on the measurement value of the dirt detection sensor 63. To do.

  In the ninth modification, the amount of rinsing water sprayed into the cleaning chamber 5 is changed by extending the time of the rinsing process, but the present invention is not limited to this. The number of rinsing steps in cycle operation may be increased. The rinsing pump 34 may be driven during the cleaning process in the cycle operation. The rinse pump 34 may be driven after a predetermined time from the end of the cycle operation.

  In the ninth modification, when the dirt (measured value) measured by the dirt detection sensor 63 is equal to or greater than a predetermined value, the amount of rinse water sprayed into the cleaning chamber 5 is changed. When the dirt (measured value) measured by the dirt detection sensor 63 is greater than or equal to a predetermined value, the pause time between the cleaning process and the rinsing process in the cycle operation may be extended.

  In this case, if the cleaning water in the cleaning tank becomes very dirty, the resting time is automatically extended, so that the rinsing process is performed in a state where the oil component floats in the upper portion and the precipitate accumulates in the lower portion in the cleaning tank 15. Is done. For this reason, it is easy to drain cleaning water containing a lot of dirt. Therefore, the cleaning water in the cleaning tank can be kept in a cleaner state. In particular, the dishwasher 1 </ b> B includes the double pipe 52, so that the upper oil content or the lower sediment in the cleaning tank 15 can be positively discharged.

(10th modification)
The dishwasher 1C according to the tenth modification shown in FIG. 17 includes a weight sensor 64 that measures the weight of an object to be cleaned in order to perform control in accordance with dirt in the cleaning tank 15, and the microcomputer 4 When the measured value measured by the weight sensor 64 is equal to or greater than a predetermined value, the amount of rinse water sprayed into the cleaning chamber 5 is changed.

  The weight sensor 64 is a sensor that measures the weight of the tableware P set in the tableware rack 8. For example, the weight sensor 64 is attached to the lower side of the tableware rack 8, and the tableware rack 8 is placed on a rack rail (not shown) via the weight sensor 64. The microcomputer 4 performs the following control based on the measurement value input from the weight sensor 64.

  As shown in FIG. 18, when the power of the dishwasher 1C is turned on (step S131), the initial hot water supply is performed and the apparatus waits until an operation start signal is input. When an operation start signal is input to the microcomputer 4 (YES in step S132), when the measured value of the weight of the tableware P input from the weight sensor 64 is less than a predetermined value (NO in step S133), a normal cycle operation is performed. Is performed (step S134). That is, as a normal cycle operation, the rinsing process is performed for 6 seconds after the cleaning process.

  On the other hand, when the measured value of the weight of the tableware P input from the weight sensor 64 is equal to or greater than the predetermined value (YES in step S133), an operation in which the time of the rinsing process in the cycle operation is extended is performed (step S135). That is, after the cleaning process, the rinsing process is extended to 8 seconds. Then, after the cycle operation is completed (step S136), the process returns to step S132.

  When the weight of the tableware P is heavy, it can be predicted that the amount of the tableware P is large, and there is also a large amount of dirt washed away from the object to be cleaned according to the amount of the tableware P. Therefore, when the tableware P is heavy, it can be predicted that the cleaning water in the cleaning tank 15 is very dirty. For this reason, when the measured value measured by the weight sensor 64 is equal to or greater than a predetermined value, the amount of the rinsing water sprayed into the cleaning chamber 5 is increased, thereby automatically depending on the state of contamination in the cleaning tank. The amount of cleaning water that is dirty in the cleaning tank can be replaced with relatively clean rinse water. Accordingly, it is possible to keep the cleaning water in the cleaning tank in a more clean state and suppress contamination.

  Moreover, when the measured value of the weight sensor 64 is less than a predetermined value, the time of the rinsing process in the cycle operation is not extended. For this reason, the increase in the running cost concerning power consumption and water consumption can be suppressed to the minimum, the washing water in the washing tank 15 can be kept in a more beautiful state, and the washing ability can be maintained.

  In addition, when the dirt measured by the weight sensor 64 is equal to or greater than a predetermined value, the time for the rinsing process is extended, so that it is automatically performed according to the dirt of the washing water in the washing tank 15 without any operation by the user. In addition, the amount of cleaning water in the cleaning tank 15 replaced with relatively clean rinsing water can be increased, so that the cleaning water in the cleaning tank 15 can be kept in a cleaner state.

  In the above description, the rinsing process is extended from the normal 6 seconds to 8 seconds. However, the user may be able to set the rinsing process according to the contamination status of the object to be cleaned. The predetermined value for determining whether or not to extend the rinsing process may be a value that can be set according to the type of the object to be cleaned. For example, when the amount of plastic tableware P is large, the amount of dirt with respect to the weight tends to be larger than when the amount of ceramic tableware P is large. For this reason, when there are a lot of plastic tableware P, by setting a predetermined value for determining whether or not to extend the rinsing process to a relatively low value, the state of contamination of the washing water in the washing tank 15 is further increased. It is possible to perform control according to.

  Further, a plurality of predetermined values to be compared with the measured values by the weight sensor 64 may be set. For example, a first predetermined value, a second predetermined value indicating that the degree of contamination is greater than the first predetermined value is set, and a measured value by the weight sensor 64 is equal to or greater than the first predetermined value and less than the second predetermined value. In this case, the time of the rinsing process of the cycle operation is extended by, for example, 2 seconds, and the time of the rinsing process of the cycle operation is extended by 4 seconds when the value measured by the weight sensor 64 is equal to or greater than the second predetermined value. It may be.

  In the tenth modification, the amount of rinsing water sprayed into the cleaning chamber 5 is changed by extending the time of the rinsing process, but this is not limitative. The number of rinsing steps in cycle operation may be increased. The rinsing pump 34 may be driven during the cleaning process in the cycle operation. The rinse pump 34 may be driven after a predetermined time from the end of the cycle operation.

  Moreover, in the said 10th modification, when the stain | pollution | contamination (measurement value) measured by the weight sensor 64 is more than predetermined value, it decided to change the quantity of the rinse water injected in the cleaning chamber 5, but weight When the dirt (measured value) measured by the sensor 64 is equal to or greater than a predetermined value, the pause time between the cycle operation cleaning process and the rinsing process may be extended.

  In this case, when the object to be cleaned is heavy, the rest time is automatically extended, so that the rinsing process is performed in the state where the oil component floats in the upper portion and the sediment accumulates in the bottom portion in the cleaning tank 15. Is called. For this reason, it is easy to drain cleaning water containing a lot of dirt. Therefore, the cleaning water in the cleaning tank can be kept in a cleaner state. In particular, the dishwasher 1 </ b> C includes the double pipe 52, so that the upper oil content or the lower sediment in the cleaning tank 15 can be positively discharged.

(Eleventh modification)
In the dishwasher of the eleventh modification, the weight sensor 64 is provided, and the weight of the tableware P is measured every time the cycle operation is performed. Change the amount of rinse water. The microcomputer 4 performs the following control based on the measurement value input from the weight sensor 64.

  As shown in FIG. 19, when the power of the dishwasher is turned on (step S141), the initial hot water supply is performed, and it waits until an operation start signal is input. When the operation start signal is input to the microcomputer 4 (YES in step S142), the measured weight of the tableware P input from the weight sensor 64 is added to the cumulative weight measured for each cycle operation so far, and the value is accumulated. The weight is set (step S143).

  If the cumulative weight is less than the predetermined value (NO in step S144), normal cycle operation is performed (step S145). That is, as a normal cycle operation, the rinsing process is performed for 6 seconds after the cleaning process.

  On the other hand, if the cumulative weight is equal to or greater than the predetermined value (YES in step S144), an operation is performed in which the time of the rinsing process in the cycle operation is extended (step S146). That is, after the cleaning process, the rinsing process is extended to 8 seconds. Then, after the cycle operation is completed (step S147), the process returns to step S142.

  If the cumulative value of the measurement values measured by the weight sensor 64 is large, it can be predicted that a lot of dirt adhering to the object to be cleaned is washed away and the dirt of the cleaning water in the cleaning tank 15 becomes severe. In particular, since the amount of dirt accumulated in the cleaning tank 15 is estimated based on the total of measured values measured by the weight sensor 64, the condition of dirt in the cleaning tank 15 can be estimated more accurately. Therefore, when the cumulative value of the measurement values measured by the weight sensor 64 is equal to or greater than a predetermined value, by automatically increasing the amount of rinsing water sprayed into the cleaning chamber, automatically according to the contamination status in the cleaning tank, It is possible to increase the amount of replacement of dirty cleaning water in the cleaning tank with relatively clean rinse water. Accordingly, it is possible to keep the cleaning water in the cleaning tank in a more clean state and suppress contamination.

  If the cumulative weight by the weight sensor 64 is less than the predetermined value, the time for the rinsing process in the cycle operation is not extended. For this reason, the increase in the running cost concerning power consumption and water consumption can be suppressed to the minimum, the washing water in the washing tank 15 can be kept in a more beautiful state, and the washing ability can be maintained.

  In addition, when the cumulative weight by the weight sensor 64 is equal to or greater than a predetermined value, the time for the rinsing process is extended, so that it is automatically performed according to the contamination of the cleaning water in the cleaning tank 15 without operation by the user. By increasing the amount of the cleaning water in the cleaning tank 15 replaced with relatively clean rinsing water, the cleaning water in the cleaning tank 15 can be kept in a more clean state.

  In the above description, the rinsing process is extended from the normal 6 seconds to 8 seconds, but the user can set it according to the contamination status of the object to be cleaned. Further, the predetermined value as a threshold for determining whether or not to extend the rinsing process may be a value that can be set according to the type of the object to be cleaned. For example, when the amount of plastic tableware P is large, the amount of dirt with respect to the weight tends to be larger than when the amount of ceramic tableware P is large. For this reason, when there are many plastic tableware P, you may set the predetermined value for determining whether the rinse process is extended comparatively low.

  Moreover, after the accumulated weight of the tableware P becomes more than a predetermined value, the time of the rinsing process of the cycle operation may be continuously extended. Further, the accumulated weight may be reset when the accumulated weight of the tableware P becomes a predetermined value or more. Moreover, after the accumulated weight of the tableware P becomes more than a predetermined value, the time of the rinsing process may be extended in a predetermined number of times (for example, five times) of cycle operation.

  In the eleventh modification, the amount of rinse water sprayed into the cleaning chamber 5 is changed by extending the time of the cleaning process, but the present invention is not limited to this. The number of rinsing steps in cycle operation may be increased. The rinsing pump 34 may be driven during the cleaning process in the cycle operation. The rinse pump 34 may be driven after a predetermined time from the end of the cycle operation.

  In the tenth modification, when the accumulated weight measured by the weight sensor 64 is equal to or greater than a predetermined value, the amount of rinse water injected into the cleaning chamber 5 is changed. When the measured cumulative weight is equal to or greater than a predetermined value, the pause time between the cycle operation cleaning step and the rinsing step may be extended.

  In this case, when the accumulated weight of the object to be cleaned is heavy, the resting time is automatically extended, so that the rinsing process is performed in a state where the oil component floats in the upper portion and the sediment accumulates in the bottom portion in the cleaning tank 15. Done. For this reason, it is easy to drain cleaning water containing a lot of dirt. Therefore, the cleaning water in the cleaning tank can be kept in a cleaner state. In particular, the dishwasher 1 </ b> B includes the double pipe 52, so that the upper oil content or the lower sediment in the cleaning tank 15 can be positively discharged.

  DESCRIPTION OF SYMBOLS 1,1A-1C ... Dishwasher, 4 ... Microcomputer (control means), 5 ... Washing room, 28 ... Hot water storage tank, 34 ... Rinsing pump, 62 ... Washing water replacement switch (operation part), 63 ... Dirt detection sensor ( Dirt detection means), 64 ... weight sensor, 50 ... overflow pipe, 52 ... double pipe, P ... tableware (object to be cleaned).

Claims (2)

After performing the cleaning step of injecting the cleaning water in the cleaning tank into the cleaning chamber, it is possible to execute a cycle operation including performing the rinsing step of injecting the rinsing water in the hot water storage tank into the cleaning chamber by a rinsing pump,
In the dishwasher in which the washing water stored in the washing tank is replaced by the amount of the rinse water that has been used as the washing water in the next washing step by collecting the rinse water injected into the washing chamber,
A dishwasher comprising control means for increasing the amount of rinsing water sprayed into the washing chamber after the cycle operation has been performed a predetermined number of times.   2. The dishwasher according to claim 1, wherein the controller increases the amount of rinse water sprayed into the cleaning chamber by driving the rinse pump during the cleaning step.

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