JP2009268577A - Dish washer and its index adjusting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique for accurately switching a switching device from a non-water feeding state to a water feeding state by detecting the closing of the opening of a washing chamber by a control device while preventing an increase in the number of parts of a dish washer. <P>SOLUTION: The dish washer 10 is equipped with the washing chamber 14, a water feeding valve 41, an air inlet path 63, an exhaust path 18, a drying fan 52, a rotation number sensor 50, a thermistor 55, and a controller 60. A memory provided in the controller 60 stores normal ranges of the rotation number of the fan corresponding to a plurality of temperature ranges respectively. The controller 60 drives the drying fan 52 to rotate a fan 53. The rotation number sensor 50 detects the number of rotations of the fan 53 and transmits the result to the controller 60. The controller 60 opens the water feeding valve 41 when the number of rotations of the fan 53 is within the normal range of the rotation number of the fan which corresponds to the temperature range including the temperature of the air in the washing chamber 14 measured by the thermistor 55. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a dishwasher. The dishwasher has a switching device (for example, a water supply valve) that switches between a state in which cleaning water is supplied into the washing tank (referred to as a water supply state) and a state that does not supply water (referred to as a non-water supply state), and a controller that controls the switching device. It is often equipped with. The present invention relates to a dishwasher that controls a switching device with a control device.

In the dishwasher, before the cleaning process or the rinsing process, the control device switches the switching device to the water supply state and supplies cleaning water into the cleaning tank.
In the washing process and the rinsing process, washing water or rinsing water (hereinafter referred to as washing water) is jetted from the washing nozzle into the washing tank to wash the dishes in the washing tank. During the operation of the dishwasher such as the washing process and the rinsing process, the opening provided in the washing tank is closed by a lid in order to take in and out the tableware. However, the opening of the cleaning tank may not be blocked by the lid. For example, in a so-called drawer type dishwasher in which the washing tub can be pulled out from the main body of the dishwasher, the tableware contained in the washing tub comes into contact with the lid, or a foreign object is placed between the washing tub and the lid. As a result, the opening of the cleaning tank is not closed by the lid. When the opening of the cleaning tank is not closed by the lid, the cleaning water leaks out of the cleaning tank in the cleaning process and the rinsing process. Therefore, for example, Patent Document 1 discloses a technique in which the control device switches the switching device to the water supply state after confirming that the opening of the cleaning tank is closed by the lid.

  The tableware washing machine of patent document 1 is provided with a washing tub, a lid, a switching device, a control device, and a lid open / close detection device. The lid open / close detection device includes a magnet and a reed switch. The magnet is disposed on the lid. The reed switch is disposed at a position facing the magnet at the upper end of the cleaning tank. In a state where the lid closes the upper end opening of the cleaning tank, the magnet and the reed switch are close to each other. When the magnet and the reed switch are close to each other, the reed switch transmits a signal to the control device. The control device can detect that the opening of the cleaning tank is closed by the lid by receiving a signal from the lid open / close detection device. In this dishwasher, when the control device receives a signal from the lid opening / closing detection device, the switching device is switched from the non-water supply state to the water supply state.

JP 2000-139798 A

  When a device that detects the closing of the opening of the washing tub, such as the lid open / close detection device of Patent Document 1, is arranged, the number of parts is greatly increased and the structure of the dishwasher becomes complicated.

  The present invention was created in order to solve the above-described problem. The purpose of the present invention is to prevent the switching device from being supplied with water by detecting the blockage of the opening of the cleaning tank while the increase in the number of components is suppressed. It is to provide a technology that can accurately switch from a state to a water supply state.

The dishwasher of the present invention includes a washing tank, a switching device, an intake path, an exhaust path, a fan, a thermistor, a storage device, and a control device.
Tableware is stored in the washing tank. The switching device switches between a water supply state in which the cleaning water is supplied into the cleaning tank and a non-water supply state in which the cleaning water is not supplied. The intake path reaches from the outside to the inside of the cleaning tank. The exhaust path reaches from the inside to the outside of the cleaning tank. The fan is disposed in at least one of the intake path and the exhaust path. The fan introduces air outside the cleaning tank into the cleaning tank via the intake path and exhausts air inside the cleaning tank outside the cleaning tank via the exhaust path. The thermistor measures the temperature of the air passing through the fan to obtain the measured temperature. The storage device stores a normal index range of an index that varies depending on resistance when air passes through the path from the intake path to the exhaust path in association with each of the plurality of temperature ranges. Then, the control device allows the switching device to be switched to the water supply state when the switching device is in the non-water supply state and the index is within the normal index range corresponding to the temperature range including the measured temperature.

  The control device may not only allow the switching device to be switched to the water supply state, but may actually switch the switching device to the water supply state. Alternatively, the control device may only set the switching device to a state that allows switching to the water supply state, and may not actually switch. In the latter case, when the predetermined condition is satisfied, for example, when a predetermined time is reached, or when another switch is operated, the switching device switches from the non-water supply state to the water supply state. If the control device is not set to allow the switching device to switch to the water supply state, the switching device does not switch to the water supply state even if a predetermined condition is satisfied.

When the opening of the cleaning tank is closed by the lid, the air outside the cleaning tank is introduced into the cleaning tank from the intake path by the fan, and the air in the cleaning tank is exhausted from the exhaust path to the outside of the cleaning tank. However, there may be a gap between the cleaning tank and the lid for some reason. When the fan is arranged in the intake path, the air in the cleaning tank is exhausted from the exhaust path to the outside of the cleaning tank by the fan, and is also exhausted to the outside of the cleaning tank from the gap between the cleaning tank and the lid. On the other hand, when the fan is disposed in the exhaust path, air outside the cleaning tank is sucked into the cleaning tank by the fan and is also sucked into the cleaning tank from the gap between the cleaning tank and the lid. In these cases, the resistance when air passes through the path from the intake path to the exhaust path is smaller than when the opening of the cleaning tank is closed by the lid.
In the dishwasher of the present invention, the reference value of the index that varies depending on the resistance when air passes through the path from the intake path to the exhaust path is stored in the storage device. Specifically, the index value in the steady state when the opening of the cleaning tank is closed by the lid is stored. Actually, the index when the opening of the cleaning tank is closed by the lid is not strictly constant. Further, the steady state index changes depending on the temperature around the fan, that is, the temperature of the air passing through the fan. The temperature of the air passing through the fan can be obtained, for example, by measuring the temperature of the air in the cleaning tank. Therefore, in this dishwasher, the storage device stores the reference value of the index corresponding to each of the plurality of temperature ranges as a range. The range of the reference value of this index is called the normal index range.

  If the opening of the cleaning tank is closed by the lid, the indicator in the steady state is within the normal indicator range corresponding to the temperature range including the measured temperature. Conversely, if there is a gap between the opening of the cleaning tank and the lid, the indicator in the steady state does not fall within the normal indicator range. From this, when the index in the steady state is within the normal index range, it can be detected that the opening of the cleaning tank is closed by the lid. In addition, even if the index in the steady state changes due to the temperature of the air passing through the fan, the control device determines whether the opening of the cleaning tank is based on the normal index range corresponding to the temperature of the air passing through the fan. It is possible to detect (blockage detection) whether or not the lid is closed. Thus, in this dishwasher, the control device switches the switching device from the non-water supply state to the water supply state only when it is detected that the washing tank is closed by the lid without using a lid open / close detection device or the like. be able to.

  In this dishwasher, it is confirmed that the steady state index is within the normal index range, and the control device allows the switching device to switch to the water supply state. Allowing here includes switching the switching device to the water supply state when another state is established. That the steady state index is in the normal index range includes one of AND conditions for switching the switching device to the water supply state. For example, while allowing the switching device to switch to the water supply state because the steady state index is within the normal index range, at that point in time, without switching to the water supply state, when the user operates the operation start switch, Alternatively, it includes a mode in which the switching device is switched to the water supply state when the preset time is reached. If the control device does not allow the switching device to be switched to the water supply state, the switching device cannot be switched to the water supply state even if the operation start switch is operated or the scheduled time comes.

In this dishwasher, when the measured temperature when the fan is rotating is constant and the index is within the normal index range corresponding to the temperature range including the measured temperature, the control device switches the switching device. It is preferable to allow switching to the water supply state.
The temperature of the air in the cleaning tank may be different from the temperature of the air outside the cleaning tank. For example, after a dishwasher performs a drying process, the tableware in a washing tank may be replaced immediately and a washing process may be started. In this case, the temperature of the air in the cleaning tank is increased by the previous drying process. That is, the air in the cleaning tank is at a higher temperature than the air outside the cleaning tank. When the fan is rotated in this state, the temperature around the fan is gradually lowered by the air outside the cleaning tank. If there is a difference in the temperature of the air inside and outside the cleaning tank, the temperature around the fan will not be constant.
In the above-described dishwasher, the temperature of the air inside and outside the washing tub is made substantially the same by rotating the fan and replacing the air inside the washing tub. As a result, the temperature around the fan is constant. According to this dishwasher, it is possible to prevent the temperature of the air passing through the fan from being measured while the temperature around the fan is changing. Accordingly, it is possible to accurately detect the blockage using the index.
In the above-described dishwasher, it is determined based on the measured temperature of the thermistor that the temperature of the air inside and outside the washing tub is substantially the same. However, it may be determined based on the time since the fan was rotated. This is because the time for the fan to replace the air in the cleaning tank can be predicted based on the performance of the fan and the capacity of the cleaning tank. In this dishwasher, the control device switches the switching device to the water supply state when the index is within the normal index range corresponding to the temperature range including the measured temperature after a lapse of a predetermined time from the start of rotation of the fan. It may be acceptable.

The dishwasher preferably further includes a drainage device for draining the cleaning water in the cleaning tank to the outside of the cleaning tank. The control device corresponds to the temperature range in which the index includes the measured temperature after the drainage device drains the cleaning water in the cleaning tank for a predetermined time when there is cleaning water above the reference water level in the cleaning tank. It is preferable to allow the switching device to switch to the water supply state when it is within the normal index range.
The dishwasher may be stopped during the washing process or the rinsing process. In this case, the cleaning water in the cleaning tank remains without being drained. In this state, when tableware is newly accommodated in the washing tank and blockage is detected, the measurement temperature measured by the thermistor may be affected by the washing water remaining in the washing tank. In particular, when the thermistor is disposed at a low position (for example, the bottom surface) of the cleaning tank, the temperature of the air cannot be measured.
In the dishwasher described above, when there is cleaning water at the reference water level or higher in the washing tank, the normal index range is set at the measured temperature after the drainage device drains the washing water in the washing tank outside the washing tank for a predetermined time. Has been decided. According to this configuration, it is possible to measure the temperature of the air passing through the fan, not the temperature of the cleaning water remaining in the cleaning tank. Thereby, occlusion detection can be accurately performed. For example, the water level in the cleaning tank may be directly detected by a water level detection device or the like. Alternatively, when the previous washing process or rinsing process is stopped halfway, the control device may determine that there is remaining washing water at or above the reference water level. The predetermined time may be determined according to the water level in the cleaning tank, or may be a preset time.

In this dishwasher, the storage device preferably stores an index determination time corresponding to each temperature range in addition to the normal index range. When the index is within the normal index range corresponding to the temperature range including the measured temperature after elapse of the index determination time corresponding to the temperature range including the measured temperature from the rotation start time of the fan, the control device It is preferable to allow switching to a water supply state.
In order for the index to reach a steady state, a certain amount of time is required from the start of driving the fan. This is because a certain amount of time is required from the start of driving the fan until the rotation of the fan reaches a steady state. The time until the rotation of the fan reaches a steady state varies depending on the temperature of the air passing through the fan. Therefore, the index determination time is longer than the time from the start of driving the fan to the steady state in each temperature range. In this dishwasher, the control device can determine whether or not to switch the switching device to the water supply state based on an index after the index determination time has elapsed corresponding to the temperature of the air in the cleaning tank.

In this dishwasher, the storage device corresponds to each temperature range, and the reference index range set within the normal index range corresponding to the temperature range and the reference set within the reference index range It is preferable to store the index value. If the index when switching of the switching device is allowed is outside the reference index range corresponding to the temperature range including the measured temperature, the control device uses the index when switching of the switching device is permitted as the reference index value. It is preferable to shift the reference index value corresponding to the temperature range including the measured temperature and to shift the normal index range corresponding to the temperature range including the measured temperature and the reference index range by the same shift amount as the reference index value. .
When the dishwasher is used for a long time, the driving performance of the fan changes. This also changes the steady state index. For example, when the driving performance of the fan decreases due to aging of the fan, the steady state index changes. It is preferable to change the normal index range following the change in the driving performance of the fan.
In this dishwasher, the index when switching of the switching device is permitted (that is, the index when it is confirmed that there is no gap between the cleaning tank and the lid within the normal index range) is outside the standard index range. In some cases, the normal index range and the reference index range are shifted. According to this dishwasher, the normal index range can be changed following the change in the driving performance of the fan in the steady state. Therefore, even if the drive performance of the fan changes, the control device can accurately switch the switching device. The reference index value may be a steady-state index value when the opening of the cleaning tank is closed by a lid, or when the upper and lower limits are set in the normal index range, It may be the center.

  As an index that varies depending on the resistance when air passes through the path from the intake path to the exhaust path, for example, fan rotational speed or fan power consumption can be adopted. Normally, since the fan is driven at a steady voltage, the power consumption of the fan can be detected, for example, by measuring a current value energized to the fan. It is also possible to employ other indicators. For example, the pressure difference between the air supply path and the exhaust path can be used as an index, or the operation sound of the fan can be used as an index. The fan rotation speed and fan power consumption can be easily detected without providing a special sensor. Therefore, when these indicators are used, a dishwasher using the indicators can be manufactured at low cost.

The present invention also provides an index adjustment method for adjusting an index of any one of the above-described dishwashers in which the index is determined based on at least one of the rotational speed of the fan and power consumption. This index adjustment method includes a fan rotation step, a temperature measurement step, a reference value determination step, an index measurement step, and an index adjustment step. In the fan rotation step, the fan is rotated. In the temperature measurement step, a measurement temperature is obtained by a thermistor. The reference value determining step determines the index reference value within the normal index range. In the index measurement step, the index is measured. In the index adjustment step, when the index measured in the index measurement step is deviated by a predetermined range from the index reference value determined in the reference value determination step, at least one of the fan speed and power consumption is changed. Adjust the index so that it approaches the index reference value.
There are individual differences in fan drive performance. Further, when the dishwasher is used for a long time, the driving performance of the fan changes. According to this index adjustment method, at least one of the rotational speed of the fan and the power consumption that determine the index is changed in accordance with the driving performance unique to the fan provided in the dishwasher. Thereby, it is possible to prevent the index when the opening of the cleaning tank is closed by the lid from being out of the normal index range due to the difference in the driving performance of the fan.

  According to the dishwasher of the present invention, whether or not the opening of the washing tub is closed by the lid based on the index that varies depending on the resistance when air passes through the path from the intake path to the exhaust path. Can be accurately detected. Thereby, in the dishwasher of this invention, switching device can be switched from a non-water supply state to a water supply state exactly, restraining a number of parts.

Hereinafter, preferred embodiments of the present invention will be described.
(Embodiment 1) In the dishwasher of the present embodiment, the indicators are the fan rotation speed when the fan is rotated at a predetermined power consumption and the power consumption of the fan when the fan is rotated at the predetermined rotation speed. Either.
(Mode 2) In the dishwasher of the present embodiment, when the control device shifts the normal index range and the reference index range corresponding to one temperature range, the normal index range and the reference index range corresponding to other temperature ranges Shift by the same amount.

(First embodiment)
A dishwasher according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of the dishwasher 10. The dishwasher 10 is a drawer-type dishwasher. The dishwasher 10 includes a main body 12, a cleaning tank 14, and a door 15.
The door 15 is provided with an operation panel 16 and an exhaust path 18. The operation panel 16 is provided with various buttons such as a start button, a lamp, and the like. The exhaust path 18 reaches from the inside of the cleaning tank 14 to the outside. The outer end of the cleaning tank 14 in the exhaust path 18 is located on the front surface of the door 15 (left side in FIG. 1). An exhaust port 18b is provided at the end of the exhaust path 18 on the door 15 side. An opening 18 a is provided at the end of the exhaust path 18 on the cleaning tank 14 side.
The cleaning tank 14 is accommodated in a space formed by the main body 12 and the door 15. The cleaning tank 14 is slidably supported by the main body 12. The cleaning tank 14 is slidable with respect to the main body 12 in the front-rear direction (left-right direction in FIG. 1). The cleaning tank 14 is connected to the door 15. When the door 15 is pulled forward (leftward in FIG. 1), the cleaning tank 14 is pulled out together with the door 15. The cleaning tank 14 is formed in a box shape whose upper end is opened by an opening 14a. The cleaning tank 14 accommodates a cleaning nozzle 20, a tableware basket 61, and the like. The cleaning nozzle 20 has a plurality of injection ports 20a. The tableware basket 61 is formed in a shape corresponding to the tableware 19 in order to hold various tableware 19.

  A lid 56 is disposed above the cleaning tank 14. The lid | cover 56 is connected with the washing tank 14 by the raising / lowering mechanism which is not shown in figure. In a state in which the door 15 is closed (a state in which the cleaning tank 14 is accommodated in the main body 12), the lid 56 is lowered and is in close contact with the opening 14a of the cleaning tank 14 to cover it. When the cleaning tank 14 is pulled out from the main body 12, the lid 56 rises and opens the opening 14 a of the cleaning tank 14.

A suction recess 31 is formed on the bottom surface 39 of the cleaning tank 14. The upper opening of the suction recess 31 is covered with the leftover filter 17. The leftover filter 17 is formed in a mesh shape. The leftover filter 17 can be removed from the cleaning tank 14. A pump 27 is provided below the bottom surface 39. The pump 27 rotates the impeller 28 by a built-in electric motor. The pump 27 can rotate the impeller 28 in one direction and can also rotate in the opposite direction. The space in which the impeller 28 is disposed and the suction recess 31 are communicated with each other by a suction flow path 32. An electric heater 30 is mounted above the bottom surface 39 where the pump 27 is disposed. A thermistor 55 is disposed below the heater 30. The thermistor 55 detects the temperature of the water when the cleaning water is put in the cleaning tank 14, and detects the temperature of the air in the cleaning tank when the cleaning water is not put.
A cleaning nozzle 20 is rotatably attached to the bottom surface 39 of the cleaning tank 14. The cleaning nozzle 20 communicates with the first discharge port 11 of the pump 27. Some of the plurality of injection ports 20a formed in the cleaning nozzle 20 cause the cleaning nozzle 20 to generate a rotating moment when water is injected.

  A drain hose 34 is connected to the rear wall 33 (the right wall in FIG. 1) of the main body 12. The drain hose 34 and the second discharge port 35 of the pump 27 are communicated with each other by a drain channel 36. One end of a water supply hose 40 is connected to the rear wall 33 of the main body 12. The other end of the water supply hose 40 is connected to the water supply pipe 88. The water supply hose 40 may be directly supplied with tap water (cold water) or may be supplied with hot water heated by a water heater. One end of the water supply hose 40 is connected to the water supply valve 41 inside the main body 12 via the first water supply flow path 42. The water supply valve 41 is driven by a built-in solenoid to open and close. When the water supply valve 41 is opened, the cleaning water is supplied into the cleaning tank 14, and when the water supply valve 41 is closed, the cleaning water is not supplied into the cleaning tank 14. The water supply valve 41 and the cleaning tank 14 are communicated with each other by a second water supply channel 43.

  An intake passage 63 is formed between the rear wall 33 of the main body 12 and the rear wall 51 of the cleaning tank 14. The intake path 63 reaches from the outside to the inside of the cleaning tank 14. A drying fan 52 is disposed in the intake path 63. The drying fan 52 rotates the fan 53 with a built-in motor (not shown). A constant electric power is supplied to the motor of the drying fan 52. The drying fan 52 is connected to the cleaning tank 14 via the intake path 63. An opening 63 a is formed on the side of the cleaning tank 14 in the intake path 63. The drying fan 52 is provided with a rotation speed sensor 50 that detects the rotation speed of the fan 53.

  A controller 60 is mounted in front of the dishwasher 10. As shown in FIG. 2, the operation panel 16, the pump 27, the heater 30, the water supply valve 41, the rotation speed sensor 50, the drying fan 52, and the thermistor 55 are connected to the controller 60. The controller 60 controls the operation of each connected device by the built-in CPU 60a, memory 60b, and the like. The memory 60b stores information for controlling each device. Further, the memory 60b stores a water supply start rotation speed database 100.

  As shown in FIG. 3, the water supply start rotation speed database 100 is associated with each of the plurality of temperature ranges 102, and the rotation speed determination time 104, the reference fan rotation speed 106, the reference fan rotation speed range lower limit 108, and the reference fan rotation. Number range upper limit 110, normal fan rotation speed range lower limit 112, and normal fan rotation speed range upper limit 114 are recorded. The temperature range 102 indicates a range that is greater than or equal to the minimum value shown in each temperature range and less than the maximum value. The reference fan rotation speed range lower limit 108 is a value obtained by subtracting 50 r / min from the value of the reference fan rotation speed 106 in the same temperature range, and the reference fan rotation speed range upper limit 110 is the value of the reference fan rotation speed 106 in the same temperature range. The value is obtained by adding 50 r / min to the value. The normal fan rotational speed range lower limit 112 is a value obtained by subtracting 300 r / min from the value of the reference fan rotational speed 106 in the same temperature range, and the normal fan rotational speed range upper limit 114 is the value of the reference fan rotational speed 106 in the same temperature range. It is a value obtained by adding 300 r / min to the value. For example, when the temperature range 102 is 15 ° C. or higher and lower than 20 ° C., the reference fan rotation speed range is 3425 r / min to 3525 r / min. The normal fan speed range is 3175 r / min to 3775 r / min. In the water supply start rotational speed database 100, an upper limit and a lower limit are specified for the reference fan rotational speed range and the normal fan rotational speed range. However, only the lower limit of the reference fan rotation speed range and the normal fan rotation speed range may be specified. In this case, the reference fan rotation speed range and the normal fan rotation speed range are equal to or greater than the specified lower limit.

Next, the operation of the dishwasher 10 will be described with reference to the drawings. As shown in FIG. 4, the dishwasher 10 operates in the order of a blockage detection process, a cleaning process, a rinsing process, and a drying process. 5 and 6 are flowcharts showing the processing procedure of the controller 60 in the blockage detection step of step S10.
First, the user turns on a start button provided on the operation panel 16. When the start button is turned on, a signal is transmitted from the operation panel 16 to the controller 60. When receiving a signal from the operation panel 16, the controller 60 checks whether or not the previous cleaning process or rinsing process is stopped halfway (step S20). When the previous cleaning process and the rinsing process have been completed (NO in step S20), the controller 60 drives the pump 27 (step S22). When the previous washing process and the rinsing process have been completed, the washing water in the washing tank 14 is drained by the pump 27. However, there are cases where the washing water adhering to the tableware 19 and the washing tank 14 falls and collects in the washing tank 14. When cleaning water is accumulated in the cleaning tank 14, the water is drained out of the cleaning tank 14 by the pump 27. The controller 60 drives the pump 27 after driving the pump 27 until a first pump driving time (for example, 15 seconds) (step S24). When the first pump drive time has elapsed after driving the pump 27 (YES in step S24), the controller 60 proceeds to step S30.

  On the other hand, when the previous washing process or rinsing process is stopped halfway (YES in step S20), the controller 60 drives the pump 27 (step S26). When the previous washing process or the rinsing process is stopped halfway, the washing water in the washing tank 14 is not drained by the pump 27. Therefore, a large amount of cleaning water remains in the cleaning tank 14. The cleaning water in the cleaning tank 14 is drained by the pump 27. The controller 60 drives the pump 27 until the second pump driving time (for example, 45 seconds) after driving the pump 27 (step S28). The second pump driving time is longer than the first pump driving time. The first pump driving time and the second pump driving time can be appropriately changed according to the performance of the pump 27 and the capacity of the cleaning tank 14. When the second pump drive time has elapsed after driving the pump 27 (YES in step S28), the controller 60 proceeds to step S30. In step S30, the controller 60 stops the pump 27.

  The controller 60 drives the drying fan 52 (step S32) to rotate the fan 53. The controller 60 checks whether or not the temperature measured by the thermistor 55 has changed (step S34). For example, when not much time has passed since the last drying step, the temperature of the air in the cleaning tank 14 is higher than the temperature of the air outside the cleaning tank 14. The temperature of the air measured by the thermistor 55 is higher than the temperature around the motor of the drying fan 52 when the fan 53 is rotating. Further, for example, when the previous cleaning process or the rinsing process is stopped halfway, the temperature in the cleaning tank 14 is influenced by the temperature of the cleaning water remaining in the cleaning tank 14. Therefore, the temperature of the air measured by the thermistor 55 may be different from the temperature around the motor of the drying fan 52 when the fan 53 is rotating. In these cases, when air outside the cleaning tank 14 is introduced into the cleaning tank 14 by the fan 53, the temperature of the air in the cleaning tank 14 gradually changes. When the temperature of the air in the cleaning tank 14 becomes equal to the temperature of the air outside the cleaning tank 14, the temperature of the air measured by the thermistor 55 becomes substantially constant. If the temperature measured by the thermistor 55 has not changed (NO in step S34), the controller 60 proceeds to step S38.

  On the other hand, if the temperature measured by the thermistor 55 has changed (YES in step S34), the controller 60 checks whether or not a predetermined time (for example, 300 seconds) has elapsed since the drying fan 52 was driven. (Step S36). If the predetermined time has not elapsed (NO in step S36), the process returns to step S34. On the other hand, when the predetermined time has elapsed (YES in step S36), the controller 60 proceeds to step S38. The predetermined time can be appropriately set according to the performance of the drying fan 52, the capacity of the cleaning tank 14, and the like. The predetermined time is, for example, a time that allows the drying fan 52 to replace the air in the cleaning tank 14.

  In step S38, the controller 60 determines the rotation time of the fan 53 from the water supply start rotation speed database 100 stored in the memory 60b, the reference fan rotation speed range, and the normal fan rotation speed based on the measured temperature of the thermistor 55. Identify the range. In this embodiment, it is assumed that the measurement temperature of the thermistor 55 is 15 ° C. In this case, the rotational speed of the fan 53 is determined 60 seconds after the fan 53 is driven. The controller 60 checks whether 60 seconds, which is the rotation speed determination time, has elapsed since the drying fan 52 was driven (step S40). If it has not elapsed (NO in step S40), the controller 60 repeats step S40 until 60 seconds have elapsed. When the rotation speed determination time has elapsed (YES in step S40), the controller 60 activates the rotation speed sensor 50 (step S42) and detects the rotation speed of the fan 53.

  FIG. 7 is a graph showing changes in the rotation speed of the fan 53 over time. The graph of FIG. 7 gives an example where the measurement temperature of the thermistor 55 is 15 ° C. The horizontal axis of the graph indicates the elapsed time (seconds) after the drying fan 52 is driven, and the vertical axis indicates the rotational speed (r / min) of the fan 53. A broken line 130 in FIG. 7 indicates the reference fan rotational speed 106 in FIG. 3. Dashed lines 132 and 134 in FIG. 7 indicate the lower limit 108 and the upper limit 110 of the reference fan rotation speed range in FIG. 3, respectively. Broken lines 136 and 138 in FIG. 7 indicate the lower limit 112 and the upper limit 114 of the normal fan rotation speed range in FIG. 3, respectively. A solid line 140 in FIG. 7 indicates a change in the rotational speed of the fan 53 when the rotational speed of the fan 53 is within the reference fan rotational speed range when the rotational speed determination time has elapsed. A solid line 142 indicates a change in the rotational speed of the fan 53 when the rotational speed of the fan 53 when the rotational speed determination time has elapsed is out of the reference fan rotational speed range and within the normal fan rotational speed range. . A solid line 144 indicates a change in the rotational speed of the fan 53 when the rotational speed of the fan 53 is smaller than the lower limit of the normal fan rotational speed range when the rotational speed determination time has elapsed. A solid line 146 indicates a change in the rotational speed of the fan 53 when the rotational speed of the fan 53 is larger than the upper limit of the normal fan rotational speed range when the rotational speed determination time has elapsed.

  When the rotational speed of the fan 53 is detected, the controller 60 checks whether or not the detected rotational speed of the fan 53 is within the reference fan rotational speed range (step S44). If the rotational speed of the fan 53 is within the reference fan rotational speed range (YES in step S44), that is, if the rotational speed of the fan 53 is indicated by a solid line 140 in FIG. 7, the controller 60 proceeds to step S50. On the other hand, when the rotation speed of the fan 53 is outside the reference fan rotation speed range (NO in step S44), the controller 60 checks whether or not the rotation speed of the fan 53 is within the normal fan rotation speed range (step S44). S46). If the rotational speed of the fan 53 is within the normal fan rotational speed range (YES in step S46), that is, if the rotational speed of the fan 53 is indicated by a solid line 142 in FIG. 7, the water supply start rotational speed database 100 is corrected ( Step S48). The case where the rotational speed of the fan 53 is outside the reference fan rotational speed range and is within the normal fan rotational speed range is, for example, a case where the driving performance of the drying fan 52 is deteriorated due to aging of the drying fan 52.

  Here, the correction method of the water supply start rotation speed database 100 is demonstrated. A case where the value detected by the rotation speed sensor 50 is 3400 r / min will be described. FIG. 8 shows the water supply start rotation speed database 100 after correcting the water supply start rotation speed database 100 of FIG. 3. The controller 60 sets the reference fan rotational speed 106 (3475 r / min in FIG. 3) corresponding to a temperature of 15 ° C. to 20 ° C. to 3400 r / min, which is a value detected by the rotational speed sensor 50 as shown in FIG. To correct. That is, the controller 60 subtracts the reference fan speed 106 shown in FIG. 3 by 75 r / min. The controller 60 subtracts the lower limit 108 and the upper limit 110 of the reference fan rotation speed range shown in FIG. 3 by 75 r / min similarly to the reference fan rotation speed 106. Further, the controller 60 also subtracts the lower limit 112 and the upper limit 114 of the normal fan rotation speed range shown in FIG. 3 by 75 r / min similarly to the reference fan rotation speed 106. Thereby, the reference fan rotation speed range and the normal fan rotation speed range are shifted by the change amount of the reference fan rotation speed 106 without changing the width thereof.

Further, the controller 60 is the same as the reference fan rotational speed 106 corresponding to the above temperature range of 15 ° C. to 20 ° C. with respect to the rotational speeds of all the fans 53 recorded in the water supply start rotational speed database 100 of FIG. Subtract by 75 r / min. That is, the controller 60 corresponds to one temperature range, the reference fan rotation speed 106, the reference fan rotation speed range lower limit 108, the reference fan rotation speed range upper limit 110, the normal fan rotation speed range lower limit 112, and the normal fan rotation speed range upper limit 114. At the same time, the reference fan speed 106, the reference fan speed range lower limit 108, the reference fan speed range upper limit 110, the normal fan speed range lower limit 112, and the normal fan speed range upper limit corresponding to other temperature ranges are corrected. 114 is also corrected.
When the process of step S48 ends, the controller 60 proceeds to step S50. In step S50, the controller 60 opens the water supply valve 41, supplies cleaning water into the cleaning tank 14, and ends the process.

  In the blockage detection step described above, the controller 60 opens the water supply valve 41 and starts water supply into the cleaning tank 14 when the rotational speed of the fan 53 is within the normal fan rotational speed range. However, other conditions for starting the water supply may be set. For example, the controller 60 may transmit a signal permitting the start of the cleaning process to the operation panel 16 when the rotation speed of the fan 53 is within the normal fan rotation speed range. In this case, the operation panel 16 turns on the lamp or emits a sound. The user operates the operation panel 16 to cause the dishwasher 10 to start the cleaning process. Further, for example, the dishwasher 10 may include a timer or the like that allows the user to set the cleaning process start time. In this case, the controller 60 may perform the above-described blockage detection process immediately before the time set by the timer or may be performed when the timer is set. When the controller 60 performs the blockage detection process when the timer is set, the controller 60 waits until the time set by the timer elapses after the blockage detection process ends, and starts the cleaning process.

If the rotation speed of the fan 53 is outside the normal fan rotation speed range (NO in step S46), that is, if the rotation speed of the fan 53 is indicated by solid lines 144, 146 in FIG. The rotation speed sensor 50 is stopped (step S52). In the state where the rotational speed of the fan 53 is indicated by a solid line 144, as shown in FIG. 9, the tableware 19 accommodated in the cleaning tank 14 contacts the lid 56, and the upper end opening of the cleaning tank 14 is covered by the lid 56. Not blocked. Further, in the state where the rotational speed of the fan 53 is indicated by the solid line 146, there is a possibility that at least a part of the exhaust path 18 or the intake path 63 is blocked by foreign matter or the like. In these cases, the controller 60 transmits a warning signal to the operation panel 16 (step S54) and ends the process. The warning signal transmitted to the operation panel 16 may be changed according to the rotation speed of the fan 53. That is, when the rotation speed of the fan 53 is less than the normal fan rotation speed range, a warning signal indicating that there is a gap between the cleaning tank 14 and the lid 56 is transmitted. On the other hand, when the rotation speed of the fan 53 is greater than the normal fan rotation speed range, a warning signal indicating that the exhaust path 18 or the intake path 63 is at least partially blocked by foreign matter or the like is transmitted. The operation panel 16 turns on a warning lamp or displays a warning according to the transmitted warning signal.
When the supply of the washing water is finished, the tableware 19 is washed. As shown in FIG. 4, when the cleaning process is completed, a rinsing process (step S14) and a drying process (step S16) are performed.

Next, a method for adjusting the current value supplied to the motor of the drying fan 52 will be described. This current adjustment is performed by an operator before shipping the dishwasher 10 or when maintaining the dishwasher 10, for example. The current adjustment is performed in a state where the opening 14 a of the cleaning tank 14 is closed by the lid 56.
FIG. 10 is a flowchart showing the procedure of the current adjustment method. The operator acquires measured temperature information of the thermistor 55 (step S100). The operator drives the drying fan 52 by the controller 60. (Step S102). The operator checks whether or not a predetermined time (for example, 200 seconds) has elapsed since the drying fan 52 was driven (step S104). The worker waits until a predetermined time has elapsed (NO in step S104). When the predetermined time has elapsed (YES in step S104), the operator operates the rotation speed sensor 50 by the controller 60 (step S106), and acquires the rotation speed of the fan 53. An operator specifies the reference | standard fan rotation speed 106 corresponding to the measured temperature acquired by step S100 from the water supply start rotation speed database 100 (step S108). Subsequently, the worker checks whether or not the rotation speed of the fan 53 acquired in step S106 is within a range of reference fan rotation speed ± αr / min (for example, α = 10) (step S110). If the rotation speed of fan 53 is within the range of reference fan rotation speed ± αr / min (YES in step S110), the operator ends without adjusting the numerical value.

  On the other hand, when the rotation speed of the fan 53 is outside the range of the reference fan rotation speed ± αr / min (NO in step S110), the operator determines that the rotation speed of the fan 53 is the reference fan rotation speed ± βr / min (for example, It is confirmed whether or not β = reference fan rotational speed × 0.1) (step S112). If the rotation speed of the fan 53 is outside the range of the reference fan rotation speed ± βr / min (NO in step S112), the operator ends without adjusting the numerical value. In this case, since there is a problem in the driving performance of the motor of the drying fan 52, another operation such as replacing the drying fan 52 is performed. On the other hand, when the rotation speed of fan 53 is within the range of reference fan rotation speed ± βr / min (YES in step S112), the operator steps the reference fan rotation speed with the current value supplied to drying fan 52. The value obtained by dividing the rotation number of the fan 53 acquired in S106 is changed to a value obtained by multiplying the current value that is currently energized (step S114), and the current adjustment is terminated.

  In the dishwasher 10 described above, the controller 60 opens the water supply valve 41 and starts supplying the cleaning water into the cleaning tank 14 in accordance with the rotational speed of the fan 53 detected by the rotational speed sensor 50. This eliminates the need for a lid opening / closing detection device using a magnet and a reed switch.

(Second embodiment)
In the dishwasher 10 of the first embodiment described above, the opening and closing of the water supply valve 41 is controlled based on the number of rotations of the fan 53 that is driven with constant power. Instead of this, the rotational speed of the fan 53 may be kept constant.
Hereinafter, in a state where the motor of the drying fan 52 is driven at a steady voltage (for example, an AC voltage of 100 V), a current value for energizing the motor of the drying fan 52 so as to maintain the rotation speed of the fan 53 at 3500 r / min. The dishwasher of the second embodiment for controlling the opening and closing of the water supply valve 41 based on the current value energized to the motor when the control is performed will be described with reference to the drawings. FIG. 11 is a longitudinal sectional view of the dishwasher 200 of the second embodiment. Here, the same components as those in the dishwasher 10 are denoted by the same reference numerals as those in FIG.

  In addition to the fan 53, the rotation speed sensor 50, and the motor, the drying fan 52 is provided with an ammeter 254 that measures a current value energized to the motor. As shown in FIG. 12, the ammeter 254 is connected to the controller 260 of the dishwasher 200. Each device of the dishwasher 200 is connected to the controller 260 similarly to the controller 60 of the dishwasher 10. The controller 260 controls the operation of each connected device by the built-in CPU 260a, memory 260b, and the like. The memory 260b stores information for controlling each device. The memory 260b stores a water supply start current value database 210.

  As illustrated in FIG. 13, the water supply start current value database 210 is associated with each of the plurality of temperature ranges 212, and includes a current value determination time 214, a reference current value 216, a reference current value range lower limit 218, and a reference current value range upper limit. 220, normal current value range lower limit 222, and normal current value range upper limit 224 are recorded. The temperature range 212 indicates a range that is greater than or equal to the minimum value shown in each temperature range and less than the maximum value. The reference current value range lower limit 218 is a value obtained by subtracting 0.005 A from the value of the reference current value 216 in the same temperature range, and the reference current value range upper limit 220 is 0. 0 to the value of the reference current value 216 in the same temperature range. It is a value obtained by adding 005A. The normal current value range lower limit 222 is a value obtained by subtracting 0.03 A from the value of the reference current value 216 in the same temperature range, and the normal current value range upper limit 224 is 0. 0 to the value of the reference current value 216 in the same temperature range. This is a value obtained by adding 03A. For example, when the temperature range 212 is 15 ° C. or higher and lower than 20 ° C., the reference current value range is 0.2450 A to 0.2550 A. The normal current value range is 0.2200A to 0.2800A. In the water supply start current value database 210, the upper limit and the lower limit are specified for the reference current value range and the normal current value range. However, only the upper limit of the reference current value range and the normal current value range may be specified. In this case, the reference current value range and the normal current value range are a range below the specified upper limit.

Next, the operation of the dishwasher 200 will be described with reference to the drawings. As shown in FIG. 4, the dishwasher 200 operates in the order of a blockage detection process, a cleaning process, a rinsing process, and a drying process. FIG. 14 is a flowchart showing the processing procedure after FIG. 5 of the controller 260 in the blockage detection step of step S10. The process of FIG. 14 is performed after the process of FIG. In FIG. 14, the same processes as those in FIG. 6 are denoted by the same reference numerals as those in FIG.
First, the user turns on a start button provided on the operation panel 16. When the start button is turned on, a signal is transmitted from the operation panel 16 to the controller 260. When receiving a signal from the operation panel 16, the controller 260 executes the processing from step S20 to step S36. Based on the measured temperature information of the thermistor 55, the controller 260 specifies the current value determination time, the reference current value range, and the normal current value range of the fan 53 from the water supply start current value database 210 stored in the memory 260b ( Step S202). In this embodiment, it is assumed that the temperature of the thermistor 55 is 18 ° C. In this case, the rotational speed of the fan 53 is determined 60 seconds after the fan 53 is driven.

  The controller 260 confirms whether or not the rotational speed of the fan 53 detected by the rotational speed sensor 50 has reached a predetermined value of 3500 r / min (step S204). If not reached (NO in step S204), the controller 260 repeats step S204 until the rotational speed of the fan 53 reaches 3500 r / min. When the rotational speed of fan 53 reaches 3500 r / min (YES in step S204), controller 260 proceeds to step S40. When the current value determination time of 60 seconds elapses after driving the drying fan 52 (YES in step S40), the controller 260 measures the current value energized to the motor of the drying fan 52 by the ammeter 254 (step S40). S206).

  When the current value energized by the motor of the drying fan 52 is measured, the controller 260 checks whether or not the current value measured by the ammeter 254 is within the reference current value range (step S208). If the current value measured by the ammeter 254 is within the reference current value range (YES in step S208), the controller 260 proceeds to the process in step S50. On the other hand, when the current value measured by the ammeter 254 is outside the reference current value range (NO in step S208), the controller 260 determines whether or not the current value measured by the ammeter 254 is within the normal current value range. (Step S210). When the current value measured by the ammeter 254 is within the normal current value range (YES in step S210), the water supply start current value database 210 is corrected (step S212). The case where the current value measured by the ammeter 254 is outside the reference current value range and is within the normal current value range is, for example, a case where the driving performance of the drying fan 52 is deteriorated due to aged deterioration of the drying fan 52. .

  Here, a correction method of the water supply start current value database 210 will be described. A case where the current value measured by the ammeter 254 is 0.2375A will be described. FIG. 15 shows the water supply start current value database 210 after correcting the water supply start current value database 210 of FIG. The controller 260 changes the reference current value 216 (0.2500 A in FIG. 13) corresponding to the temperature from 15 ° C. to 20 ° C. to 0.2375 A which is the current value measured by the ammeter 254 as shown in FIG. to correct. That is, the controller 260 subtracts the reference current value 216 shown in FIG. 13 by 0.0125A. The controller 260 subtracts the lower limit 218 and the upper limit 220 of the reference current value range shown in FIG. Further, the controller 260 also subtracts the lower limit 222 and the upper limit 224 of the normal current value range shown in FIG. Thereby, the reference current value range and the normal current value range are shifted by the change amount of the reference current value 216 without changing the width.

Further, the controller 260 applies 0. 0 to all the current values recorded in the water supply start current value database 210 of FIG. 13 in the same manner as the reference current value 216 corresponding to the temperature range of 15 ° C to 20 ° C. Subtract 0125A. That is, the controller 260 corrects all the current values recorded in the water supply start current value database 210 at the same time as correcting the reference current value 216 corresponding to one temperature range.
When the process of step S212 ends, the controller 260 proceeds to step S50. In step S50, the controller 260 opens the water supply valve 41, supplies cleaning water into the cleaning tank 14, and ends the process.
On the other hand, when the current value measured by the ammeter 254 is outside the normal current value range (NO in step S210), the controller 260 stops the rotation of the fan 53 (step S214), and executes step S54 for processing. Exit. When the supply of the washing water is finished, the tableware 19 is washed. As shown in FIG. 4, when the cleaning process is completed, a rinsing process (step S14) and a drying process (step S16) are performed.

  In the dishwasher 200 described above, the controller 260 opens the water supply valve 41 in accordance with the current value measured by the ammeter 254 and starts supplying the cleaning water into the cleaning tank 14. This eliminates the need for a lid opening / closing detection device using a magnet and a reed switch.

  In the dishwasher 10 of the first embodiment, the fan rotation speed range when supplying the cleaning water to the cleaning tank 14 can be changed by the temperature of the air in the cleaning tank 14. Moreover, in the dishwasher 200 of 2nd Example, the electric current value range when supplying washing water to the washing tank 14 can be changed with the temperature of the air in the washing tank 14. FIG. Thereby, it is possible to cope with a change in index due to a temperature change in the cleaning tank 14. Further, in the dishwashers 10 and 200, the rotation speed of the fan 53 when the controllers 60 and 260 open the water supply valve 41 or the reference range of the current value energized to the motor of the drying fan 52 can be corrected. Thereby, the change in the driving performance of the drying fan 52 can be fed back from the next time. The dishwasher 10 may be a thermistor that measures the temperature of the air outside the dishwasher 10 instead of the thermistor 55.

  Moreover, in the dishwashers 10 and 200, before the controller 60 determines the measurement temperature of the thermistor 55 when specifying the reference index value or the like, the pump 27 is driven and the cleaning water in the cleaning tank 14 is drained. . Thereby, it is possible to prevent the thermistor 55 from measuring the temperature of the cleaning water remaining in the cleaning tank 14. Moreover, in the dishwashers 10 and 200, the drying fan 52 is driven and the air in the washing tank 14 is replaced. Thereby, it is possible to prevent the measured temperature of the thermistor 55 from being affected by the effect of the drying process performed last time and the effect of the cleaning water remaining in the cleaning tank 14. As a result, the reference range of the index can be specified accurately. Thereby, in the dishwasher 10,200, the obstruction | occlusion of the lid | cover 56 can be detected correctly using an parameter | index.

Moreover, in the dishwasher 10 of 1st Example, the electric current value with which the motor of the drying fan 52 is supplied with electricity based on the rotation speed of the fan 53 in the state by which the opening 14a of the washing tank 14 is obstruct | occluded with the lid | cover 56. Can be adjusted. Thereby, it is possible to adjust the current value to be energized according to the driving performance of each drying fan 52. Further, by adjusting the current value supplied to the motor of the drying fan 52, even if the driving performance of the drying fan 52 changes due to aging, the respective values 106 and 108 recorded in the water supply start rotation speed database 100 are changed. , 110, 112, 114 can be used to detect blockage.
In the dishwasher 200 according to the second embodiment, the rotational speed of the fan 53 may be adjusted based on the current value supplied to the drying fan 52 in the closed state. FIG. 16 is a flowchart showing a work procedure of the rotation speed adjustment method. In the flowchart of FIG. 16, the same processes as those in the flowchart of FIG. When the operator completes the process up to step S104, the operator specifies the reference current value corresponding to the measured temperature acquired in step S100 from the water supply start current value database 210 (step S300). The operator confirms the measured value of the ammeter 254, and confirms whether or not the measured current value is within the range of the reference current value ± δA (for example, δ = 0.001) (step S302). If YES in step S302, the operator ends without adjusting the rotation speed of the fan 53. In the case of NO in step S302, it is confirmed whether or not the measured current value is within the range of reference current value ± εA (for example, ε = reference current value × 0.1) (step S304). If NO in step S304, the operator ends without adjusting the rotation speed. If YES in step S304, the operator changes the rotation speed of the fan 53 to a value obtained by multiplying the current rotation speed of the fan 53 by a value obtained by dividing the reference current value by the measured current value. (Step S306), the rotation speed adjustment is terminated.

  In the dishwashers 10 and 200 described above, the drying fan 52 is disposed only in the intake passage 63. However, a fan may be disposed also in the exhaust path 18 or a fan may be disposed only in the exhaust path 18.

Specific examples of the present invention have been described in detail above, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.
In addition, the technical elements described in the present specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology illustrated in the present specification or the drawings achieves a plurality of objects at the same time, and has technical utility by achieving one of the objects.

The cross-sectional schematic diagram of the tableware washing machine of 1st Example. The block diagram which shows the control system of the dishwasher of 1st Example. The figure which shows the water supply start rotation speed database of 1st Example. The flowchart which shows the driving | operation operation | movement of a dishwasher. The flowchart which shows the obstruction | occlusion detection process of 1st Example. The flowchart which shows the obstruction | occlusion detection process of 1st Example. The graph which shows the change of the rotation speed of the fan by the time of 1st Example. The figure which shows the corrected water supply start rotation speed database of 1st Example. The cross-sectional schematic diagram of the dishwasher in case there exists a clearance gap between a washing tank and a lid | cover. The flowchart which shows the operation | movement procedure of the electric current adjustment method of 1st Example. The cross-sectional schematic diagram of the tableware washing machine of 2nd Example. The block diagram which shows the control system of the dishwasher of 2nd Example. The figure which shows the water supply start electric current value database of 2nd Example. The flowchart which shows the obstruction | occlusion detection process of 2nd Example. The figure which shows the corrected water supply start electric current value database of 2nd Example. The flowchart which shows the operation | movement procedure of the rotation speed adjustment method of 2nd Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10: Tableware washing machine 12: Main body 14: Washing tank 18: Exhaust path 18a: Opening 18b: Exhaust port 41: Water supply valve 50: Revolution sensor 52: Drying fan 60: Controller 63: Intake path 63a: Opening 200: Dishwashing Machine 210: Water supply start current value database 230: Water supply stop current value database 254: Ammeter

Claims (8)

A washing tank for storing tableware;
A switching device for switching between a water supply state for supplying cleaning water into the cleaning tank and a non-water supply state for not supplying cleaning water;
An intake path reaching from the outside to the inside of the washing tank;
An exhaust path reaching from the inside to the outside of the washing tank;
A fan that is disposed in at least one of the intake path and the exhaust path, introduces air outside the cleaning tank into the cleaning tank through the intake path, and exhausts air in the cleaning tank out of the cleaning tank through the exhaust path; ,
A thermistor that measures the temperature of the air passing through the fan and obtains the measured temperature;
A storage device that stores a normal index range of an index that varies depending on resistance when air passes through a path from an intake path to an exhaust path in association with each of a plurality of temperature ranges;
A control device that allows the switching device to be switched to the water supply state when the switching device is in a non-water supply state and the index is within a normal index range corresponding to a temperature range including the measured temperature;
A dishwasher characterized by comprising: The control device switches the switching device to the water supply state when the measured temperature when the fan is rotating is constant and the index is within a normal index range corresponding to the temperature range including the measured temperature. The dishwasher according to claim 1, wherein the dishwasher is allowed. It is further equipped with a drainage device that drains the cleaning water in the cleaning tank to the outside of the cleaning tank,
The control device corresponds to the temperature range in which the index includes the measured temperature after the drainage device drains the cleaning water in the cleaning tank for a predetermined time when there is cleaning water above the reference water level in the cleaning tank. The dishwasher according to claim 1 or 2, wherein the switching device is allowed to be switched to a water supply state when it is within a normal index range. The control device allows the switching device to be switched to a water supply state when the index is within a normal index range corresponding to a temperature range including the measured temperature after a lapse of a predetermined time from the start of rotation of the fan. The dishwasher according to any one of claims 1 to 3. The storage device stores the index determination time corresponding to each temperature range in addition to the normal index range,
The control device supplies water to the switching device when the index is within the normal index range corresponding to the temperature range including the measured temperature after the index determination time corresponding to the temperature range including the measured temperature has elapsed since the fan rotation start time. The dishwasher according to any one of claims 1 to 4, wherein switching to a state is allowed. The storage device further stores a reference index range set in the normal index range corresponding to each temperature range and a reference index value set in the reference index range corresponding to each temperature range. And
When the index when the switching device is allowed to be switched is outside the reference index range corresponding to the temperature range including the measured temperature, the control device allows the switching device to be switched to be the reference index value. The reference index value corresponding to the temperature range including the measured temperature is shifted, and the normal index range corresponding to the temperature range including the measured temperature and the reference index range are shifted by the same shift amount as the reference index value. The dishwasher as described in any one of Claim 1 to 5. The dishwasher according to any one of claims 1 to 6, wherein the index is either the number of rotations of the fan or power consumption of the fan. The index adjustment method for adjusting the index of the dishwasher according to any one of claims 1 to 7, wherein the index is determined based on at least one of a rotational speed of the fan and power consumption.
A fan rotation step for rotating the fan;
A temperature measurement step for obtaining a measurement temperature by a thermistor;
A reference value determination step for determining an index reference value within a normal index range;
An index measurement step for measuring the index;
When the index measured in the index measurement step is deviated by a predetermined range from the index reference value determined in the reference value determination step, the index is indexed by changing at least one of the fan speed and power consumption. An index adjustment step for adjusting the reference value closer to the reference value;
An index adjustment method having

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