JP5731289B2 - Dishwasher - Google Patents

Description

The present invention provides ventilation means through a ventilation path extending from a water supply port for supplying hot water for cleaning and rinsing into the cleaning space of the cleaning tank, an air suction port from the cleaning space, and an air supply port to the cleaning space. The air in the cleaning space circulated in the air is cooled by contact with hot water for dehumidification to condense moisture in the air to dehumidify, and the hot water and condensed water after dehumidification treatment are removed from the cleaning tank. A dehumidifying part configured to flow in, a heating means for heating the air in the cleaning space, a hot water intermittent means for intermittently supplying hot water to the water supply port and intermittently supplying hot water to the dehumidifying part And a drainage pump that draws hot water from the bottom of the cleaning space and discharges it to the outside, and that the level of hot water stored in the cleaning space is the cleaning water level and the drainage discharge water level lower than the cleaning water level To detect A position detecting means, cleaning, processing rinsed rinsing said washing object to wash the washing object of the washing space, and a control means for performing a drying process for drying the cleaned object is provided,
In the cleaning process and the rinsing process, the control means stores the hot water at the cleaning water level in the cleaning space and performs cleaning and rinsing based on the detection information of the water level detecting means. And, after the cleaning process and the rinsing process, to perform a drainage operation for cleaning that operates the drain pump to discharge hot water stored in the cleaning space, and the drying process In order to contact the hot water for dehumidification and the air passing through the ventilation path while heating the air in the cleaning space with the heating means, the ventilation means, the heating means, and the hot water intermittent means And when the water level detecting means detects the drainage water level for drying, the drainage pump for drying which operates the drainage pump to discharge hot water at the level of drainage water for drying is controlled. It relates configured dishwasher to repeat.

Such dishwashers are used for washing dishes such as dishes and teacups.
That is, the dishwasher is operated in various usage forms, and the standard usage form is that hot water for washing is contained in the washing space in a state where the object to be washed is accommodated in the washing space. The cleaning water is discharged from the cleaning nozzle equipped in the cleaning space as cleaning water, and then the hot water in the cleaning space is discharged by the cleaning drainage operation. Rinsing water is supplied into the space, and the rinsing process is performed by ejecting the rinsing water from the cleaning nozzle equipped in the cleaning space. Then, the hot water in the cleaning space is discharged by the cleaning drain operation. After that, the drying process is performed.

  Moreover, the above-described dishwasher cools the air passing through the ventilation path by contacting with the hot water for dehumidification while heating the air in the washing space by the heating means as a drying process. Since moisture is condensed and dehumidified, when performing the drying process, moist air is not discharged outside the machine, so the moist air is installed by the user or the dishwasher. Therefore, it can be prevented from being sprayed on other devices existing in the place where the operation is performed, and it is easy to use.

  As a conventional example of such a dishwasher, a hot water intermittent means is a branching from a water supply path connected to a water supply source and opens and closes a cleaning branch path connected to a water supply port, and a water supply path A dehumidifying on-off valve that opens and closes a dehumidifying branch that is branched from the dehumidifier, and a governor that is equipped on the dehumidifying branch and stabilizes the flow rate of hot water flowing through the dehumidifying branch The control means closes the on-off valve for cleaning and the on-off valve for dehumidification when supplying hot water in the cleaning process and the rinsing process, and supplies hot water in the drying process. In some cases, the on-off valve for cleaning is closed and the on-off valve for dehumidification is opened (see, for example, Patent Document 1).

  In the above-mentioned patent document 1, when supplying hot water in the cleaning process and the rinsing process, the control means opens the dehumidifying on-off valve in addition to the cleaning on-off valve. Since it is possible to quickly store the hot water, it is possible to improve the work efficiency and the frequency of flowing the hot water to the dehumidifying part is increased, so that the dehumidifying part can be easily kept clean. .

  Incidentally, although not described in Patent Document 1, in general, a dishwasher is equipped with an abnormal water level detection means for detecting that hot water is stored in an abnormally high water level in the washing space. When the abnormal water level is detected by the abnormal water level detecting means, the control means is configured to operate the drain pump to execute a discharge process for discharging hot water in the cleaning space.

JP 2010-233653 A

  In a dishwasher, when hot water is stored in the cleaning space at an abnormally high water level, such an abnormal state is detected by the abnormal water level detecting means, and the hot water in the cleaning space is discharged. Discharge processing will be performed, but if such discharge processing is repeated repeatedly in a short period of time, a large amount of hot water will be consumed wastefully, so there will be abnormalities in the cleaning space in a short time. It is necessary to suppress the state where the water is stored at a high water level.

  However, conventionally, when the on-off valve for cleaning cannot be operated in a closed state due to the inclusion of foreign matter or the like, hot water flows into the cleaning space through the branch for the cleaning tank, so that hot water flows into the cleaning space in a short time. Is stored at an abnormally high water level, a large amount of water may be wasted.

  That is, in the dishwasher, it is desired to improve the working efficiency by storing hot water at the cleaning water level in a short time in the cleaning process and the rinsing process. Since the washing tank branch and the on-off valve for cleaning are configured so that the flow rate that can be supplied is increased, if the on-off valve for cleaning cannot be operated to the closed state due to the inclusion of foreign matter, etc. There was a risk that the water would be wasted.

  The present invention has been made in view of the above circumstances, the purpose of which is to suppress the wasteful consumption of a large amount of water in a state where the configuration of the hot and cold intermittent means is suppressed, and It is in the point which provides the dishwasher which can detect the failure state of a hot-water intermittent means appropriately.

The dishwasher of the present invention includes a water supply port for supplying hot water for washing and rinsing into the washing space of the washing tank,
By cooling the air in the cleaning space circulated by the ventilation means through the ventilation path extending from the air suction port to the cleaning space and the air supply port to the cleaning space by contact with hot water for dehumidification, A dehumidifying part configured to condense and dehumidify moisture in the air, and to flow the dehumidified hot water and condensed water into the washing tank;
Heating means for heating the air in the cleaning space;
Hot water intermittent means for intermittently supplying hot water to the water supply port and intermittently supplying hot water to the dehumidifying section;
A drainage pump for sucking hot water from the bottom of the washing space and discharging it to the outside;
A water level detecting means for detecting that the level of hot water stored in the cleaning space is a cleaning water level and a drying discharge water level lower than the cleaning water level;
A cleaning unit that cleans an object to be cleaned in the cleaning space, a rinsing process for rinsing the object to be cleaned, and a control unit that executes a drying process for drying the object to be cleaned;
The control means is
In the cleaning process and the rinsing process, the hot water intermittent means is controlled based on the detection information of the water level detecting means to store the hot water of the cleaning water level in the cleaning space and perform cleaning and rinsing, and , After the cleaning process and the rinsing process, in order to discharge the hot water stored in the cleaning space, to perform a cleaning drain operation that operates the drain pump, and
In the drying treatment, the heating means, the heating means, and the air passing through the ventilation path are brought into contact with the hot water for dehumidification and the air passing through the ventilation path. When the hot water intermittent means is controlled and the water level detecting means detects the water level for drying, the water draining operation for operating the water pump is repeated to discharge the hot water at the water level for drying. The first characteristic configuration is configured as follows:
The hot water interrupting means is branched from a first on-off valve for opening and closing a water supply path connected to a water supply source, a washing tank branch path branched from the water supply path and connected to the water supply port, and the water supply path. Of the dehumidifying branch connected to the dehumidifying section, a second on-off valve that opens and closes the cleaning tank branch, and the first on-off valve and the second open / close equipped on the dehumidifying branch. A constant flow valve that restricts the flow rate of hot water flowing through the dehumidifying branch path to be less than the flow rate of hot water flowing through the washing tank branch path when the valve is open;
The control means is
When supplying hot water in the cleaning process and the rinsing process, open the first on-off valve and the second on-off valve, and when supplying hot water in the drying process, open the first on-off valve; and Configured to close the second on-off valve; and
In the cleaning process and the rinsing process, the hot water storage elapsed time from the start of supplying hot water to the cleaning space from which hot water has been discharged until the drying discharged water level is detected is equal to or longer than a first set time. And when the second set time or less, the second on-off valve is configured to execute a closed failure determination process for determining that the valve is closed.
In the state where the first on-off valve is not closed, the first on-off valve and the second on-off valve are opened to start supplying hot water to the cleaning space from which hot water is discharged. The cleaning is performed for a longer time than the first estimated time required for detecting the level of drainage discharged water, and opening the first on-off valve and closing the second on-off valve to discharge hot water. It is set to a time shorter than the second predicted time required from the start of hot water supply to the space until the drying discharge water level is detected, and the second set time is longer than the second predicted time. It is characterized by the points specified in.

That is, when supplying hot water to the cleaning space in the cleaning process and the rinsing process, the first on-off valve and the second on-off valve are opened, and hot water from the water supply channel is supplied from the water supply port to the cleaning space through the cleaning tank branch. And hot water from the water supply channel is supplied to the cleaning space from the dehumidifying section through the dehumidifying branch channel.
In the drying process, the first on-off valve is opened and the second on-off valve is closed, and the hot water from the water supply passage is dehumidified in a state where the flow of hot water through the washing tank branch passage is stopped. It will be supplied to the dehumidifying part through the road.

  In the dehumidification branch, when the first on-off valve and the second on-off valve are in the open state, the flow rate of hot water flowing through the dehumidification branch path is greater than the flow rate of hot water flowing through the branch path for the washing tank. Since the flow rate valve for limiting the flow rate is provided, the flow rate of the hot water supplied through the dehumidification branch path is limited to a small amount required for the dehumidifying action in the dehumidifying section.

  And about the stop of the hot water supply to the washing space through the branch for the washing tank, the first on-off valve equipped in the water supply path and the second on-off valve equipped in the branch for the washing tank are used in a double manner. Even if one of the first on-off valve and the second on-off valve becomes incapable of being closed due to a foreign object or the like, the cleaning tank branch is opened. The supply of hot water to the cleaning space that has passed through is stopped, and in a short time, the hot water is prevented from being stored in the cleaning space at an abnormally high water level, and a large amount of water is wasted. It is avoided.

  In other words, the flow rate of hot water through the washing tank branch in the open state of the first on-off valve and the second on-off valve can quickly store hot water at the cleaning water level in the washing space. In order to reduce the supply of hot water to the cleaning space through the branch for the washing tank, the flow rate is configured to be greater than the flow rate of hot water through the dehumidification branch having the constant flow valve. In this case, when the hot water supply cannot be stopped properly, the hot water is stored in the cleaning space at an abnormally high water level in a short time, and the discharge of hot water stored at the abnormally high water level is discharged. There is a possibility that a large amount of hot and cold water is consumed wastefully because the processing is repeatedly performed in a short cycle.

  According to the first characteristic configuration, with respect to the stop of hot water supply to the cleaning space through the cleaning tank branch path, the first on-off valve provided in the water supply path and the second on-off valve provided in the cleaning tank branch path Therefore, the hot water supply to the cleaning space through the cleaning tank branch path prevents the hot water from being stored in an abnormally high water level. As a result, it is avoided that a large amount of hot and cold water is consumed.

  In addition, when the first on-off valve installed in the water supply path cannot be properly shut off due to a foreign object or the like, hot water flows through the dehumidifying branch and passes through the dehumidifying section. Although it will flow into the cleaning space, the flow rate of hot water through the dehumidifying branch is limited to a small amount by the constant flow valve, so the first on-off valve equipped in the water supply channel should be properly Even if it cannot be shut off, it takes a long time for hot water to be stored at an abnormally high water level in the cleaning space, and the above-described discharge process is repeatedly performed in a short cycle. And a large amount of hot water is not wasted.

  That is, in addition to the first on-off valve and the second on-off valve described above, an on-off valve for opening and closing the dehumidifying branch is provided, and the first on-off valve and the dehumidifying valve are also used for stopping the supply of hot water to the dehumidifying branch. It is possible to adopt a structure that shuts off twice by using an open / close valve that opens and closes the branch path, but the flow rate of hot and cold water through the dehumidification branch path is limited to a small amount by a constant flow valve. Paying attention, because it is configured not to be equipped with an on-off valve that opens and closes the dehumidifying branch, it is possible to suppress wasteful consumption of a large amount of hot water in a state in which the configuration of the hot water intermittent means is suppressed. .

  In addition, according to the first characteristic configuration, in the cleaning process and the rinsing process, the control unit starts supplying hot water to the cleaning space from which the hot water has been discharged until the drying discharge water level is detected. When the hot water storage elapsed time is not less than the first set time and not more than the second set time, it is configured to execute a closed failure determination process for determining that the second on-off valve is closed. In a state where the second opening / closing valve is not closed, the set opening time opens the first opening / closing valve and the second opening / closing valve, starts supplying hot water to the cleaning space where hot water is discharged, and then discharges the water level for drying. Is longer than the first predicted time required until the water is detected, opens the first on-off valve and closes the second on-off valve, and starts supplying hot water to the cleaning space from which the hot water is discharged, It takes to detect the discharge water level for drying. 2 is set to a time shorter than the predicted time, and the second set time is set to a time longer than the second predicted time. It is possible to appropriately detect that the second on-off valve is in the closed state when the time is 1 set time or more and 2nd set time or less.

That is, since the flow rate of hot water through the dehumidification branch is limited to a small amount by a constant flow valve, such as 0.15 L / min, the first on-off valve is opened and the second on-off valve is opened. When the hot water is supplied to the cleaning space from which the hot water has been discharged, the second predicted time until the dry discharged water level is detected is a considerably long time such as 360 seconds.
Further, since the flow rate of hot water through the branch for the washing tank is determined to be a large amount, for example, 5 L / min for the purpose of improving the working efficiency in the washing process and the rinsing process, the second In a state where the on-off valve is not closed, the first on-off valve and the second on-off valve are opened, and when the hot water is supplied to the cleaning space from which the hot water has been discharged, One prediction time is considerably short, for example, 11 seconds.

  Therefore, if the second on-off valve is in a closed failure state, the first on-off valve and the second on-off valve are opened, and when the hot water is supplied to the cleaning space from which the hot water has been discharged, the drying discharge water level is detected. Since the hot water storage elapsed time until the time is equal to the second predicted time when the first on-off valve is opened and the second on-off valve is closed, the first set time is larger than the first predicted time. If the second set time is set to a time longer than the second predicted time, and the second set time is set to a time shorter than the second predicted time, it can be determined that the second on-off valve is closed.

  Incidentally, the cleaning space from which the hot water is discharged is, of course, a cleaning space immediately after the hot water is discharged in the cleaning drain operation.

  In short, according to the first characteristic configuration of the present invention, it is possible to suppress wasteful consumption of a large amount of water in a state in which the configuration of the hot water interrupting means is suppressed, and to detect a failure state of the hot water interrupting means. It is possible to provide a dishwasher capable of appropriately performing the above.

The second feature configuration of the present invention is in addition to the first feature configuration described above.
In the closed failure determination process, when the hot water storage elapsed time has passed the second set time and the drying discharge level is not detected, the control means determines that the first on-off valve is closed. It is characterized by being configured to determine.

  That is, in the closed failure determination process, the control means determines that the first on-off valve is closed when the drying water discharge level is not detected even after the hot water storage elapsed time has passed the second set time. Therefore, it can be appropriately detected that the first on-off valve is in a closed failure state.

  In other words, if the first on-off valve is in a failure state, hot water is not supplied to the cleaning space even if the first on-off valve and the second on-off valve are opened. Therefore, the hot water storage elapsed time opens the first on-off valve. In addition, if the discharge water level for drying is not detected even after the elapse of a second set time set to a time larger than the second predicted time when the second on-off valve is closed, the first on-off valve is in a closed failure state. It can be determined that

  In short, according to the second characteristic configuration of the present invention, it is possible to provide a dishwasher that can appropriately determine the closed failure state of the first on-off valve in addition to the operational effects of the first characteristic configuration.

In addition to the first or second feature configuration described above, the third feature configuration of the present invention includes:
The control means is
The cleaning space in which hot water is discharged by opening the first on-off valve and the second on-off valve when executing the cleaning process or the rinsing process at every measurement timing when a set period elapses from a reference time point. Measuring the time from the start of the supply of hot water to the time when the discharge water level for drying or the water level for washing is detected, updated and stored as a first measured value, and
Each time the cleaning process and the rinsing process are performed, the first on-off valve and the second on-off valve are opened, and the supply of hot water to the cleaning space from which hot water has been discharged is started. It is configured to measure the time until the discharged water level or the cleaning water level is detected, and update and store the second measured value, and
When it is determined in the closed failure determination process that the second on-off valve has a closed failure, the second time measured in the cleaning process or the rinsing process when it is determined that the second on-off valve has a closed failure. When the value obtained by normalizing the measured value with the first measured value satisfies a criterion for indicating that the second on-off valve is closed, the second on-off valve is determined to be closed. In addition, when the determination criterion condition is not satisfied, a filter clogging determination process is performed in which it is determined that the second on-off valve is not closed and the filter provided in the water supply channel is clogged. It is characterized by.

  That is, the control means, for example, at the measurement timing when a set period (for example, 10 days) elapses from the reference time, with the time when the power is turned on at the time of installation of the dishwasher or the time when maintenance is completed, as the reference time, When performing the cleaning process or the rinsing process, the first on-off valve and the second on-off valve are opened, and the supply of hot water to the cleaning space from which the hot water has been discharged is started. Is measured and is updated and stored as the first measurement value.

  The control means opens the first on-off valve and the second on-off valve every time the cleaning process and the rinsing process are executed, starts supplying hot water to the cleaning space from which the hot water has been discharged, and then performs drying. The time until the discharged water level or the cleaning water level is detected is measured and updated and stored as the second measured value.

  When the control means determines that the second on-off valve has a closed fault in the above-described closed fault determination process, the control means performs a measurement in the cleaning process or the rinsing process when it is determined that the second on-off valve has a closed fault. A value obtained by normalizing the second measured value with the first measured value is obtained, and when the normalized value satisfies a criterion condition indicating that the second on-off valve is closed, the second on-off valve If the second on-off valve is not a closed fault and the filter equipped with the water supply path is clogged, the filter clogging determination process is executed. become.

  That is, the hot water storage elapsed time from when the first on-off valve and the second on-off valve are opened and hot water is supplied to the cleaning space from which hot water has been discharged until the discharge water level for drying is detected is the equipment of the water supply channel. Even when the filter is clogged, the second on-off valve tends to become longer as in the case of the closed failure state.

  Specifically, when hot water is supplied to the cleaning space from which hot water has been discharged, the hot water storage elapsed time until the drying discharge water level is detected indicates that the second on-off valve is in a closed failure state. Since the supply of hot water through the service branch is stopped, the time corresponds to the second predicted time when the first on-off valve is opened and the second on-off valve is closed. However, the filter provided in the water supply passage is clogged. In some cases, the flow of hot water through the washing tank branch is continued because there is no flow of hot water due to clogging of the filter, so the hot water storage elapsed time is less than the second predicted time. Will also be shorter.

  Since the first set time is set to a time shorter than the second predicted time, the hot water storage elapsed time is longer than the first set time even when the hot water storage elapsed time becomes longer due to clogging of the filter provided in the water supply channel. In this case, it is determined that the second on-off valve is in the closed failure state by the closed failure determination process.

  Thus, even if it is determined by the closed failure determination process that the second on-off valve is closed due to the clogging of the filter provided in the water supply channel, the second on-off valve is closed by the filter clogging determination process. It is determined whether it is not a failure but a clogged filter in the water supply channel or a closed failure of the second on-off valve.

When the filter clogging determination process is described, the first measurement value and the second measurement value are determined by opening the first on-off valve and the second on-off valve when the cleaning process or the rinsing process is executed, and hot water is discharged. This corresponds to the time from the start of supplying hot water to the washing space until the detection of the discharge water level for washing or the washing water level, but the first measured value is the closing failure of the second on-off valve. Since this is a value before the occurrence of, the value is irrelevant to the closing failure of the second on-off valve.
However, although the first measured value tends to increase due to the clogging of the filter installed in the water supply channel, the clogging of the filter equipped in the water supply channel gradually proceeds. Since the flow rate of the hot water does not decrease at a stroke, the first measured value does not increase greatly.

On the other hand, the second measured value is a value corresponding to the case where it is determined that the second on-off valve has a closed fault in the closed fault determination process. Since the flow of hot water through the service branch is stopped, it is sufficiently larger than the first measured value.
When the second on-off valve is closed, the flow of hot water through the washing tank branch is stopped, whereas when the filter equipped in the water supply channel is clogged, the washing tank branch Since the flow of hot water through the water continues, the second measured value is larger when the second on-off valve is closed and malfunctioned than when the filter provided in the water supply channel is clogged.

Therefore, for example, when a division value obtained by dividing the first measurement value by the second measurement value is obtained as a value obtained by normalizing the second measurement value by the first measurement value, the division value is obtained by the second on-off valve. The value at the time of a closed failure is smaller than when the filter installed in the water supply channel is clogged.
Therefore, when the above-mentioned division value is obtained as a normalized value, the determination reference value as the determination reference condition is clogged when the second on-off valve is closed and when the filter provided in the water supply channel is clogged. A value obtained by normalizing the second measurement value with the first measurement value is a value corresponding to the case where the second on-off valve has failed to close, as a determination criterion condition, such as setting the value to be distinguishable from the time. Or by determining that the value corresponding to when the filter installed in the water supply channel is clogged is determined, the closed failure determination process determines that the second on-off valve is in the closed failure state. In addition, the filter clogging determination process makes it possible to determine whether the second on-off valve is not a closed failure, but is a clogged filter in the water supply channel or a closed failure of the second on-off valve.

  Further, based on the value obtained by normalizing the second measured value to the first measured value, the second on-off valve is not closed and the filter equipped with the water supply channel is clogged or the second on-off valve is closed. Even if the water supply pressure of hot water supplied to the water supply channel may fluctuate due to fluctuations in the water supply pressure of the water supply source connected to the water supply channel, filter clogging determination Processing can be performed appropriately.

  In short, according to the third feature configuration of the present invention, in addition to the operational effects of the first or second feature configuration described above, the second on-off valve is in an open failure or the filter provided in the water supply channel is clogged. It is possible to provide a dishwasher that can appropriately determine whether or not it is working.

The fourth feature configuration of the present invention is in addition to the third feature configuration,
The control means is configured to execute a notification process for notifying a determination result of the closed failure determination process and a determination result of the filter clogging determination process.

  That is, the determination result of the closed failure determination process and the determination result of the filter clogging determination process are notified by the notification process.

  As described above, since the determination result of the closed failure determination process and the determination result of the filter clogging determination process are notified, the user can confirm that the second on-off valve is closed or a filter installed in the water supply channel. Recognizing that clogging has occurred, make a maintenance call to a maintenance company, etc., and resolve the abnormalities of the second on-off valve closing failure and the clogging of the filter installed in the water supply channel Will do.

  In short, according to the fourth characteristic configuration of the present invention, in addition to the operational effects of the third characteristic configuration described above, it is possible to satisfactorily perform the repair work of the second on-off valve and the repair work of the filter installed in the water supply channel. Can provide a dishwasher that can.

Perspective view of dishwasher Notched side view with the cleaning tank stored Schematic diagram of dishwasher Schematic perspective view showing the flow state of drying air Notched perspective view of water level detection sensor Longitudinal side view of detection state of hot water discharge water level Longitudinal side view of cleaning water level detection state Vertical side view of abnormal water level detection Vertical side view of the closed state of the second on-off valve Vertical side view of the valve in the open state Block diagram showing control configuration Flow chart showing control operation Flow chart showing control operation Flow chart showing control operation Flow chart showing control operation

Embodiment
Next, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1 and FIG. 2, a main body portion 1 is provided as a main body case portion having an open front portion, and a drawer portion 2 having a cleaning tank D having a square shape in plan view is provided on the main body portion 1. On the other hand, the drawer-type dishwasher as an example of the dishwasher is provided so that it can be pulled out and stored along the horizontal direction.
Although not illustrated, a slide-type rail mechanism is provided that supports the drawer portion 2 so as to be movable with respect to the main body portion 1, and the drawer portion 2 exposes most of the main body portion 1 to the outside. It is configured so that it can be pulled out to the state.

  The inner lid 3 that closes the upper surface of the cleaning tank D when the drawer 2 is housed in the main body 1 opens the upper surface of the cleaning tank D when the drawer 2 is pulled out from the main body 1. Thus, it is provided in a form that is automatically opened and closed as the drawer part 2 is pulled out and stored, and an openable and closable cleaning space Q is configured in the internal space of the cleaning tank D.

The front part of the drawer part 2 is provided with a door body A that opens and closes the opening of the front part of the main body part 1, and the door body A is gripped when the drawer part 2 is pulled out from the main body part 1 or stored. A holding part B is provided. Although not described in detail, an engaging means P that engages with the engaging portion Pa of the main body 1 as the drawer 2 is housed in the main body 1 is provided at the inner side portion of the grip B. When the engaging means P is engaged with the engaging portion Pa, the drawer portion 2 is held in the state of being housed in the main body portion 1. Then, the engaging means P can be operated in a released state in which the engagement is released with the fingers supporting the gripping part B when the drawer part 2 is pulled out from the main body part 1.
Further, the door body A is provided with an operation unit SS for performing various operations for driving.

As shown in FIG. 3, a water supply channel 4A connected to a water supply source such as a water supply, a washing tank branch channel 4B branched from the water supply channel 4A, and a dehumidification branch channel 4C branched from the water supply channel 4A are provided. Is provided.
The washing tank branch 4B is connected to a water supply port 5 (see FIG. 2) for supplying hot water for cleaning and rinsing into the washing space Q of the washing tank D. The dehumidifying branch 4C is connected to the washing tank D. It is connected to a dehumidifying part G, which will be described later, provided on the front side wall Df.

  The first on-off valve V1 that opens and closes the water supply path 4A, the second on-off valve V2 that opens and closes the washing tank branch path 4B, and the dehumidification branch path 4C are equipped with the first on-off valve V1 and the second on-off valve. A constant flow valve V3 for limiting the flow rate of hot water flowing through the dehumidification branch 4C to be smaller than the flow rate of hot water flowing through the washing tank branch 4B in the open state of the on-off valve; Hot water / interrupting means E, which is provided and performs intermittent connection of hot water supply to the water supply port 5 and intermittent supply of hot water to the dehumidifying part G from the first open / close valve V1, the second open / close valve V2, and the constant flow valve V3. Is configured.

That is, when hot water is supplied to the cleaning space Q, the first on-off valve V1 and the second on-off valve V2 are opened, and when hot water is supplied only to the dehumidifying section G, the first on-off valve V1 is opened. As a result, the second on-off valve V2 is closed.
The second on-off valve V2 has a flow rate of hot water flowing through the washing tank branch 4B higher than a flow rate of hot water flowing through the dehumidification branch 4C (for example, 0.15 L / min). A constant flow valve V4 that controls the flow rate (for example, 5 L / min), which is sufficiently large but suppresses excessive flow, is provided in a state of being integrally incorporated (see FIGS. 9 and 10).

In addition, a first on-off valve V1, a second on-off valve V2, and a constant flow valve V3 are arranged at the back side portion of the main body 1, and the second on-off valve V2 and the water supply port 5 in the washing tank branch 4B. Are connected by a flexible hose R1, and a portion connecting the constant flow valve V3 and the dehumidifying part G in the dehumidifying branch 4C is formed by a flexible hose R2.
Incidentally, a filter Vf for filtering and removing foreign matters is provided at the upper position of the first on-off valve V1 in the water supply channel 4A.

  As shown in FIG. 2 and FIG. 3, a dual-purpose pump 6 that functions as a cleaning pump in the forward direction and functions as a drainage pump in the reverse direction is provided below the bottom of the cleaning tank D in the drawer 2. In the cleaning space Q of D, a cleaning nozzle 8 and an electric heater 9 as a heating means are arranged, and a cleaning basket 10 for storing and placing an object to be cleaned such as tableware is a cleaning tank. It is detachably mounted inside D.

The dual-purpose pump 6 is connected to a water storage recess S formed at the bottom of the cleaning tank D by a suction pipe 11, and the dual-purpose pump 6 is connected to a drain pipe 12.
That is, in the forward rotation state, the dual-purpose pump 6 pumps hot water stored in the bottom of the cleaning space Q to the cleaning nozzle 8 and jets hot water from the cleaning nozzle 8. In the reverse rotation state, The hot water stored in the cleaning space Q is discharged to the outside through the drain pipe 12.

The drain pipe 12 is equipped in a state extending to the back part of the drawer part 2, and the tip part of the drain pipe 12 is connected to the drain trap 12B disposed at the back part side of the main body part 1 by a drain hose 12A. The external connection hose 12C is connected to the drain trap 12B.
Therefore, the external connection hose 12C is connected to the drain pipe of the installation location equipped in the location where the dishwasher is installed, so that hot water in the cleaning space Q can be drained to the outside.

Moreover, as shown in FIG. 3, the water level detection sensor J is connected to the recessed part S for water storage via the guide tube 13 as a communicating path.
As will be described later, the water level detection sensor J stores that the level of hot water stored in the cleaning space Q of the cleaning tank D is the cleaning water level Y2 (see FIG. 7), and stores in the cleaning space Q of the cleaning tank D. The level of the hot water to be discharged is equivalent to a state in which most of the hot water has been discharged from the cleaning space Q, and is a hot water discharge water level Y1a (see FIG. 6) that is low enough to expose the heater 9. The hot water stored in the cleaning water level Y3 (see FIG. 8) is higher than the cleaning water level Y2, and the level of the hot water stored in the cleaning space Q of the cleaning tank D is the hot water discharge water level Y1a. The discharge water level Y1b for drying (see FIG. 6), which is a little higher than that and low enough to expose the heater 9, is configured to be detected.

  That is, in the water level detection sensor J, the level of the hot water stored in the cleaning space Q of the cleaning tank D is the cleaning water level Y2, and the level of the hot water stored in the cleaning space Q of the cleaning tank D is the cleaning water. The hot water discharge water level Y1a lower than the position Y2, and the level of hot water stored in the cleaning space Q of the cleaning tank D is lower than the cleaning water level Y2 and slightly higher than the hot water discharge water level Y1a. The water level detecting means for detecting the water level Y1b and the abnormal water level detecting means for detecting that the level of the hot water stored in the cleaning space Q of the cleaning tank D is the abnormal water level Y3 are configured. Become.

In the present embodiment, when the water level detection sensor J detects the cleaning water level Y2, 2.4 L (liter) of hot water is stored in the cleaning space Q, and the drying discharge water level Y1b is the water level detection sensor. When detected at J, hot water corresponding to 0.9 L (liter) is stored in the cleaning space Q.
As shown in FIG. 2, a drain pan 14 for receiving water leakage is provided at the bottom of the main body 1. Although not illustrated, the presence or absence of water received and collected by the drain pan 14 is detected. It will be equipped with a leak sensor.

As shown in FIGS. 2 and 3, of the four side walls that form the cleaning space Q in the cleaning tank D, the front side wall Df corresponding to the front side of the machine body, that is, the front side of the drawer, is provided with the drying unit K. Is attached.
That is, as shown in FIG. 4, the air supply port 21 that supplies the air from the drying unit K to the cleaning space Q and the drying unit K suck the air in the cleaning space Q into the front side wall portion Df. The air suction port 22 is formed at a position corresponding to the lower side of the cleaning space Q and at positions separated on both the left and right sides. Specifically, the air supply port 21 and the air suction port 22 are formed so as to be positioned below the cleaning basket 10 and above the above-described water storage recess S, and in this embodiment, Has the air supply port 21 on the right side and the air suction port 22 on the left side.

As shown in FIG. 3, the drying unit K has a cleaning space Q through a ventilation path F extending between the air suction port 22 and the air supply port 21 inside the casing 20 fixed to the front side wall portion Df of the cleaning tank D. The circulation fan 23 as a ventilation means for circulating the air and the above-mentioned dehumidifying part G for dehumidifying the air circulated through the ventilation path F are provided.
The ventilation path F has an inverted U-shape composed of an ascending path part f1 extending upward from the air suction port 22 and a descending path part f2 extending downward from the upper end of the ascending path part f1 toward the air supply port 21. The dehumidifying part G is disposed in the ascending path part f1, and the circulation fan 23 is disposed in the descending path part f2.

The dehumidifying part G includes a plurality of heat transfer plates 24 juxtaposed at intervals along the plate thickness direction and ejects hot water for dehumidification from the ejection nozzle 25 toward the heat transfer plates 24. The air flowing upward through the heat transfer plates 24 is cooled by contact with dehumidification water flowing down the surface of the heat transfer plate 24 and contact with dehumidification water flowing down between the heat transfer plates 24. Thus, the moisture in the air is condensed and dehumidified.
The dehumidified hot water and condensed hot water ejected from the ejection nozzle 25 flow into the cleaning space Q of the cleaning tank D through the air suction port 22 and are stored in the water storage recess S.

  Then, in a state where the electric heater 9 is heated, the circulation fan 23 is ventilated and hot water for dehumidification is ejected from the ejection nozzle 25, so that the air sucked from the cleaning space Q is supplied to the dehumidifying part G. After the dehumidification, the drying air is supplied to the cleaning space Q as drying air, and the supplied air is heated by the electric heater 9 to dry the cleaning object in the cleaning space Q. It is configured to do so.

  Further, the odor in the air sucked from the cleaning space Q is obtained by performing the ventilation operation of the circulation fan 23 and the ejection operation of hot water for dehumidification from the ejection nozzle 25 with the electric heater 9 stopped. The components are absorbed in dehumidifying water by the dehumidifying unit G and then supplied to the cleaning space Q so that a deodorizing operation for deodorizing the cleaning space Q can be performed.

The air flow in the drying operation will be described. As shown in FIG. 4, the air supplied to the cleaning space Q from the air supply port 21 formed in the front side wall portion Df of the cleaning tank D rises as the main flow. Then, it flows toward the back side, and then flows while moving downward toward the air suction port 22 formed on the lower side of the front side wall portion Df and at a position separated from the air supply port 21 in the left-right direction. Thus, the air flows in a form discharged from the air suction port 22, and the air easily flows to the lower portion of the cleaning tank where the air suction port 22 is located.
Therefore, it is possible to shorten the drying time by allowing air to flow through the entire cleaning object in the cleaning tank and drying the cleaning object efficiently.

As shown in FIG. 3, the drawer unit 2 is equipped with a control unit H as a control means for controlling the operation.
Then, as shown in FIG. 11, the control unit H, based on a command input from the operation unit SS, a DC motor 6a for driving the dual-purpose pump 6, an electric heater 9, a circulation fan 23, and The operation of the hot water intermittent means E is controlled to perform a cleaning operation as a cleaning process for cleaning the cleaning object in the cleaning space Q formed inside the cleaning tank D, and a rinsing process for rinsing the cleaning object. From the rinsing operation, the drainage operation as a drainage treatment for draining hot water stored in the cleaning space Q of the cleaning tank D, the ventilation operation of the circulation fan 23 and the ejection nozzle 25 in a state where the electric heater 9 is heated. In the drying operation as a drying process for performing the dehumidifying hot water jetting operation and the electric heater 9 being stopped, the circulation fan 23 is ventilated and the dehumidifying hot water from the jet nozzle 25 is used. It is configured to perform deodorization operation of a deodorizing process to perform the ejection operation.

In FIG. 11, 6A is a DC motor drive circuit that adjusts the drive voltage applied to the DC motor 6a that drives the dual-purpose pump 6, and commands the control unit H to specify the positive and negative direction of the drive voltage applied to the DC motor 6a. The drive voltage applied to the DC motor 6a is adjusted to the command voltage commanded from the control unit H.
That is, the DC motor driving circuit 6A switches the driving voltage applied to the DC motor 6a to drive the DC motor 6a in the normal rotation or reverse rotation state, and in each of the normal rotation driving state and the reverse rotation driving state. The rotational speed of the dual-purpose pump 6 can be changed by adjusting the magnitude of the drive voltage applied to the DC motor 6a.

  In the present embodiment, the control unit H controls the dual-purpose pump 6 at the target rotational speed based on the detection information of the rotational speed sensor M as the rotational speed detecting means for detecting the rotational speed of the dual-purpose pump 6. Rotation speed adjustment processing (hereinafter abbreviated as FB control) in which a drive voltage supplied to the DC motor 6a is obtained by proportional-integral control and the DC motor drive circuit 6A is commanded using the drive voltage as a command voltage in order to drive in reverse and reverse directions. ) Is configured to perform.

  By the way, when the dual-purpose pump 6 is driven in reverse, the control unit H is more than the amount of hot water supplied per unit time supplied to the cleaning space Q of the cleaning tank D through the cleaning tank branch 4B and the dehumidification branch 4C. The dual-purpose pump 6 is configured to operate with a large amount of drainage per hour.

In FIG. 11, L1 is an alarm lamp provided in the operation unit SS, L2 is an alarm buzzer built in the operation unit SS, and L3 is a display unit provided in the operation unit SS. The buzzer L2 and the display unit L3 function as an alarm means L that operates when an abnormality occurs. Incidentally, a code corresponding to the content of the abnormality that has occurred is displayed on the display unit L3.
In FIG. 11, N is a storage switch for detecting that the drawer 2 is stored in the storage position of the main body 1, 9A is a drive circuit for the heater 9, and 23A is a drive voltage for the circulation fan 23. It is the circulation fan drive circuit to adjust.

Next, the operation performed by the control unit H will be described.
The operation unit SS is configured to select various operation courses such as a continuous operation course in which the washing operation, the rinsing operation, the drying operation, and the deodorizing operation are sequentially performed, and a drying only course in which only the drying operation is performed. The standard driving course, the careful driving course, the speedy driving course, and the rapid driving course can be selected as the continuous driving course. In the present embodiment, only the standard driving course of the continuous course will be described.

A control operation of the control unit H will be described based on the flowchart of FIG.
First, the storage switch N detects that the drawer 2 is stored in the storage position of the main body 1 (# 1), the power switch of the operation unit SS is turned on (# 2), and the driving course is selected. When the start switch of the operation unit SS is turned on (# 4), the selected driving course is executed.

Hereinafter, the description will be continued assuming that the standard operation course of the continuous course is selected and the start switch of the operation unit SS is turned ON.
After the operation unit SS start switch is turned ON, first, the cleaning operation (# 5) and the drainage operation (# 6) after the cleaning operation are executed, and then the rinsing operation (# 7) and the rinsing operation. The subsequent drain operation (# 8) is executed. Then, it is determined whether or not the rinsing operation has been completed twice (# 9). If the rinsing operation has not been completed twice, the rinsing operation (# 7) and the drain operation (# 8) after the rinsing operation are performed. Will be executed again.

  If it is determined in # 9 that the rinsing operation has been completed twice, the heating rinsing operation (# 10) and the drainage operation (# 11) after the heating rinsing operation are performed, followed by the drying operation (# 12). ) And deodorizing operation (# 13) are sequentially executed.

  In the washing operation, first, the first on-off valve V1 and the second on-off valve V2 are opened, and hot water is supplied into the washing space Q from the water supply port 5 through the water supply passage 4A and the washing tank branch passage 4B. Then, hot water is supplied to the dehumidifying part G through the dehumidifying branch 4C, and hot water is supplied from the dehumidifying part G into the cleaning space Q through the air suction port 22. When the water level detection sensor J detects that the water level in the cleaning space Q has reached the cleaning water level Y2, the first on-off valve V1 and the second on-off valve V2 are closed to supply hot water to the cleaning space Q. Stop supplying.

Thereafter, the combined operation of the combined pump 6 and the heater 9 is performed, and the cleaning operation of spraying the cleaning water from the cleaning nozzle 8 toward the object to be cleaned is continued until the set cleaning operation time elapses. Will do.
In addition, before the user turns on the start switch of the operation unit SS, the cleaning detergent can be put into the cleaning tank D to perform cleaning using the detergent.

  In the drainage operation after the cleaning operation, the dual-purpose pump 6 is reversely operated to start the draining operation for draining hot water in the cleaning tank D, and then until the set time for cleaning drainage (for example, 30 seconds) elapses. The drainage operation will be continued.

In the rinsing operation, when hot water is supplied to the cleaning space Q and the cleaning water level Y2 is detected by the water level detection sensor J, the supply of hot water is stopped as in the above-described cleaning operation.
Thereafter, the dual-purpose pump 6 and the heater 9 are operated, and the rinsing operation that rinses the object to be cleaned with the rinsing water heated by the heater 9 is performed until the set rinsing operation time elapses. become.

  In the drainage operation after the rinsing operation, the drainage operation in which the dual-purpose pump 6 is reversely operated to drain the hot water in the cleaning tank D in the same manner as the drainage operation after the cleaning operation is performed for a set time for cleaning drainage (for example, 30 Until the second) elapses.

In the heating rinse operation, when hot water is supplied to the cleaning space Q and the cleaning water level Y2 is detected by the water level detection sensor J, the hot water supply is stopped as in the above-described cleaning operation.
Thereafter, the dual-purpose pump 6 and the heater 9 are operated to perform a rinsing operation for rinsing the object to be cleaned with the rinsing water heated by the heater 9, and the temperature sensor (not shown) When the temperature of the rinsing water reaches the set temperature for finishing (for example, 67 ° C.), the heating rinsing operation is finished.

  The drainage operation after the heating rinse operation is continuously performed until the set time (for example, 30 seconds) for cleaning drainage elapses by operating the dual-purpose pump 6 in the reverse direction, similarly to the draining operation after the cleaning operation. become.

  Incidentally, in the following description, the drain operation after the cleaning operation, the drain operation after the rinse operation, and the drain operation after the heating rinse operation are referred to as a cleaning drain operation.

In the drying operation, with the electric heater 9 being heated, the ventilation operation of the circulation fan 23 and the ejection operation of ejecting hot water for dehumidification from the ejection nozzle 25 are performed. Continue until time (eg, 25 minutes) has elapsed.
During the drying operation, when the water level detection sensor J detects the above-described drying discharge water level Y1b, the drying drainage operation is performed.
This drying drainage operation is performed until the set time (for example, 15 seconds) for drying drainage elapses, in which drainage is performed by reversely operating the dual-purpose pump 6.

In the deodorizing operation, the electric heater 9 is stopped, and the ventilation operation of the circulation fan 23 and the ejection operation of ejecting hot water for dehumidification from the ejection nozzle 25 are performed. This is performed until a set time (for example, 15 minutes) has elapsed.
During the deodorizing operation, the deodorizing drainage operation is performed when the water level detection sensor J detects the discharge water level Y1b for drying, as in the case of the drying operation.
This deodorizing drainage operation is similar to the drying drainage operation, in which drainage operation is performed by reversely operating the dual-purpose pump 6 and the drainage operation for deodorizing drainage after the drying level Y1b is detected by the water level detection sensor J. Will continue until the set time (for example, 15 seconds) elapses.

  Incidentally, in the operation stop state in which the controller H does not execute the cleaning operation, the rinsing operation, the drying operation, the deodorizing operation, etc., the water level of the hot water in the cleaning space Q is the drying discharge water level Y1b in the water level detection sensor J. When this is detected, an abnormality determination drainage process is performed in which the dual-purpose pump 6 is operated for a set time (for example, 15 seconds) in order to drain the hot water stored in the cleaning space Q. .

That is, when the first on-off valve V1 is in an open failure state, hot water is supplied to the cleaning space Q through the dehumidifying branch 4C, and the first on-off valve V1 and the second on-off valve V2 are When an open failure state occurs, hot water is unnecessarily supplied to the cleaning space Q through the cleaning tank branch 4B and the dehumidification branch 4C. The hot water supplied to the space Q is discharged.
When such an abnormality occurs, the alarm means L is activated to prompt maintenance. Incidentally, an error code indicating that the water level detection sensor J has detected that the water level of the hot water in the cleaning space Q is the drying discharge water level Y1b is displayed on the display unit L3. become.

  In addition, the control unit H is also used when the abnormal water level Y3 is detected by the water level detection sensor J when the first on-off valve V1 and the second on-off valve V2 are closed in the cleaning operation or the rinsing operation. The pump 6 is configured to perform wastewater treatment for avoiding abnormal water levels that operates for drainage. The waste water treatment for avoiding the abnormal water level is executed in a form in which the dual-purpose pump 6 is operated until the water level detection sensor J detects that the water level is lower than the cleaning water level Y2.

That is, when the first on-off valve V1 is in an open failure state, hot water is supplied to the cleaning space Q through the dehumidifying branch 4C, and the first on-off valve V1 and the second on-off valve V2 are When an open failure state occurs, hot water is unnecessarily supplied to the cleaning space Q through the cleaning tank branch 4B and the dehumidification branch 4C, but the waste water treatment for avoiding abnormal water levels is executed. The hot water supplied to the cleaning space Q is discharged.
When such an abnormality occurs, the alarm means L is activated to prompt maintenance. Incidentally, the display unit L3 indicates that the abnormal water level Y3 is detected by the water level detection sensor J when the first on-off valve V1 and the second on-off valve V2 are closed in the washing operation and the overrun operation. The error code shown will be displayed.

In the dishwasher of this embodiment, as shown in FIG.2 and FIG.3, the pressure adjustment means W which adjusts automatically so that the internal pressure of the washing space Q of the closed state may turn into an external pressure is provided.
That is, for example, in the cleaning process, when the electric heater 9 is heated, the temperature in the cleaning space Q becomes a considerably high temperature (for example, 67 ° C.). Thereafter, the washing water is discharged, and the rinsing water is supplied to the washing space Q for the rinsing process, and the rinsing water is ejected from the washing nozzle 8 by the operation of the combined pump 6. Is a low temperature (for example, 13 to 17 ° C.). For this reason, when low-temperature rinse water is ejected from the cleaning nozzle 8, the temperature in the cleaning space Q rapidly decreases, and as a result, a large amount of air in the cleaning space Q contracts rapidly, and cleaning is performed. In some cases, the internal pressure of the space Q tends to decrease greatly. In such a case, the internal pressure of the cleaning space Q is automatically adjusted to the external pressure by the action of the pressure adjusting means W.

The pressure adjusting means W is configured to adjust the pressure in the cleaning space Q by communicating with the cleaning space Q in the cleaning tank D through the communication hole 32 formed in the rear side wall portion DR of the cleaning tank D. However, in the present embodiment, description of the detailed configuration is omitted.
In addition, although the condensed water may be generated in the pressure adjusting means W, the condensed water is configured to be collected in the cleaning tank D through the water level detection sensor J.

Next, the water level detection sensor J will be described with reference to FIGS.
The hot water storage tank 40 for detecting the water level in which the hot water in the cleaning tank D is introduced by the guide tube 13 described above, and the level of the hot water stored in the hot water storage tank 40 provided in the hot water storage tank 40. The float 41 for detecting the water level that moves up and down according to the position, the guide portion U that guides the shaft portion 41B that extends upward from the main body portion 41A of the float 41, and the upper portion of the hot water storage tank 40 are located above the upper end. Thus, a pair of first water level detection unit T1 and second water level detection unit T2 that detect the two vertical positions of the float 41 are provided.

  The hot water storage tank 40 is formed in a bottomed cylindrical shape having a quadrangular cross section, and at the bottom thereof, a connecting cylinder portion 40C to which the above-described guide tube 13 is connected is formed. And the upper opening is covered with the lid body 42 fitted on the upper part (see FIG. 5).

Incidentally, the upper end portion of the hot water storage tank 40 is provided with a washing water receiving portion 40A and a dew condensation water receiving portion 40B for receiving dew condensation water from the pressure adjusting means W in a protruding state outward, and a lid 42 is provided. In addition, the opening for connecting with the pressure adjusting means W is formed in the cover 42 so as to cover the storage portion 40A and the condensed water receiving portion 40B for receiving the washing water, and covering the condensed water receiving portion 40B in the lid body 42. Vk is formed.
The function of the washing water receiving unit 40A will be described later.

  The two up / down positions of the float 41 are an up / down position (see FIG. 7) for detecting the cleaning water level Y2 and an up / down position (see FIG. 6) for detecting the hot water discharge water level Y1a. Yes, the first water level detection unit T1 detects that the float 41 is located at the lift position for detecting the high-level washing water level Y2, and the second water level detection unit T2 detects the low-side hot water discharge water level Y1a. It is configured to detect that the float 41 is positioned at the lift position.

The first water level detection unit T1 and the second water level detection unit T2 are configured using a photo-interrupter type optical sensor, and the first water level detection unit T1 projects from the top of the lid body 42. The second water level detection portion T2 is attached to a second sensor attachment portion 42b protruding from the upper portion of the lid body 42.
5-8, in order to show the internal structure of the water level detection sensor J, some description of the hot water storage tank 40 and the cover body 42 is abbreviate | omitted. And since the 1st sensor attachment part 42a is a thing with which the description in the cover body 42 is abbreviate | omitted, it cannot show in figure, In FIG. 6, it is a 2 dot chain line (virtual line) Show.

Further, the above-described abnormal water level detecting electrode 43 for detecting the abnormal water level is located on the lid body 42 such that the upper end side is positioned above the lid body 42 and the lower end side protrudes into the hot water storage tank 40. Is provided.
That is, the electrode 43 for detecting an abnormal water level is washed in which the water level of the hot water storage tank 40 is detected by the first water level detection unit T1 on the high water level side of the first water level detection unit T1 and the second water level detection unit T2. When the set amount is higher than the water level Y2, the lid body 42 is equipped in a state of being conducted by hot water stored in the hot water storage tank 40 (see FIG. 8).

In the state where the shaft portion 41B of the float 41 is located at the elevated position on the low water level side among the plurality of elevated positions, that is, in the state positioned at the elevated position for detecting the hot water discharge water level Y1a, The upper end portion is formed to have a length that is positioned below the upper end of the hot water storage tank 40 (see FIGS. 5 and 6).
And the swing lever 44 provided with the to-be-detected part 44a detected in the 2nd water level detection part T2 of the low water level side among the 1st water level detection part T1 and the 2nd water level detection part T2 is the axis | shaft of the float 41 It is linked to the upper end of the part 41B and is provided in a state of swinging up and down.

In other words, the swing lever 44 is pivotally supported by the second sensor mounting portion 42b so as to swing up and down around the horizontal axis X, and one end side portion of the horizontal axis X is the above-described detected portion. The other end side portion of the horizontal axis X is formed in the linkage portion 44b with the shaft portion 41B.
The linkage portion 44b is formed in a bifurcated shape, and is configured such that the upper end of the shaft portion 41B is engaged with the linkage portion 44b.
That is, a pair of left and right plate-like bodies 41a project from the upper end portion of the shaft portion 41B and below the upper end, and a protrusion 41b for preventing the left and right ends from the upper end of the shaft portion 41B. It is formed in a state protruding in the same direction as the pair of plate-like bodies 41a.
The bifurcated linkage portion 44b of the swing lever 44 is inserted between the protrusion 41b for preventing detachment and the pair of left and right plate-like bodies 41a, and the upper end of the shaft portion 41B is a bifurcated linkage portion. 44b is configured to penetrate through 44b.

In the state where the float 41 is located at the elevated position on the high water level of the up and down positions, that is, in the state where the float 41 detects the cleaning water level Y2, the shaft portion 41B of the float 41 has hot water as its upper end. It is formed in a length that is positioned above the upper end of the storage tank 40 (see FIG. 7).
Of the pair of plate-like bodies 41a described above, one protruding toward the presence side of the first water level detection unit T1 is configured to function as a detected portion detected by the first water level detection unit T1. ing.

One of the pair of plate-like bodies 41a provided at the upper end of the shaft portion 41B is different from the one that functions as the detected portion detected by the first water level detecting portion T1. It is comprised as a guide groove which carries out engagement guidance over the whole raising / lowering range of 41 (refer FIG. 5).
In other words, a downwardly recessed portion 42A that protrudes downward from the upper end of the water storage tank in a state in which the lid 42 covering the upper opening of the hot water storage tank 40 becomes lower as the insertion portion of the shaft 41B of the float 41 becomes lower. In addition, the guide portion U is formed in a state including the recessed portion 42A in the lid body 42 and the upward projecting portion 42B of the lid body.

  In addition, although not illustrated, the plate-like body 41a that functions as the detected portion detected by the first water level detection unit T1 of the pair of plate-like bodies 41a is engaged along the ascending / descending direction of the float 41. Although an auxiliary guide groove for guiding is provided, this auxiliary guide groove exists up to the vicinity of the first water level detection unit T1, but a plate-like body 41a that functions as a detected portion is provided in the first water level detection unit T1. Therefore, the float 41 is not guided over the entire lifting / lowering range of the float 41.

Since the swing lever 44 is received on the upper surface of the lid 42 when swinging to a lower position corresponding to the hot water discharge water level Y1a, the water level detection sensor J of the present embodiment The lowest water level in the detection range corresponds to the hot water discharge water level Y1a.
For this reason, the water level detection sensor J of the present embodiment stores a little more hot water than the hot water discharge water level Y1a from the state where hot water less than the hot water discharge water level Y1a is stored at the bottom of the cleaning space Q, and discharges hot water. The change from the state in which the water level Y1a is detected to the state in which it is not detected corresponds to the state in which the discharge water level Y1b for drying is detected (see FIG. 6).

  In other words, in the case of the present embodiment, the controller H changes the hot water discharge level Y1b from the state in which the water level detection sensor J detects the hot water discharge water level Y1a to the state in which the hot water discharge water level Y1a is not detected. It is comprised so that it may discriminate | determine that was stored.

  Incidentally, in the case where the lowest water level in the detectable range of the water level detection sensor J is configured to be lower than the hot water discharge water level Y1a, the water level detection sensor J does not detect the hot water discharge water level Y1a. By changing to a state in which the discharge water level Y1a is detected, it is possible to detect that hot water of a water level corresponding to the drying discharge water level Y1b is stored at the bottom of the cleaning space Q. In this case, the hot water discharge water level Y1a and the drying discharge water level Y1b are the same water level.

When the above-described washing water receiving unit 40A is described, as shown in FIG. 3, when performing the drainage operation, a part of hot water flowing through the drain pipe 12 passes through the branch pipe 12a to the water level detection sensor J side. The branch pipe 12a is connected to a pipe connection part 40a provided in the washing water receiving part 40A.
Accordingly, when a drainage operation is performed, a part of hot water drained by the dual-purpose pump 6 flows into the washing water receiving portion 40A and then discharged into the hot water storage tank 40, whereby the hot water storage tank 40 The wall surface can be cleaned.

  As described above, the dishwasher according to the present embodiment cleans and dries the object to be cleaned by performing the washing operation, the rinsing operation, the heating rinsing operation, the washing drain operation, the drying operation, and the deodorizing operation. However, in addition to the above-described configuration, the following configuration is provided.

  That is, in the drying process, the elapsed time for drying from the start of supplying hot water to the cleaning space Q from which hot water has been discharged to the time when the drain discharge water level Y1b is detected is the set determination time. In the following cases, it is configured to execute an open failure determination process for determining that the second open / close valve V2 is open, and the set determination time is determined by opening the first open / close valve V1 and the second open / close valve V2. In a time (for example, 30 seconds) longer than the time (for example, 11 seconds) required from the start of the supply of hot water to the cleaning space Q from which the hot water has been discharged until the discharge drain water level Y1b is detected. Is set.

Incidentally, the cleaning space Q from which hot water has been discharged means that the hot water in the cleaning space Q has been discharged by the cleaning drainage operation and the drying drainage operation. The same applies to the following description. is there.
The setting determination time is from when supply of hot water to the cleaning space Q from which hot water has been discharged is detected until the drying discharge water level Y1b is detected when the second on-off valve V2 is not in an open failure state. Of course, the time is shorter than the time required (for example, 360 seconds).

When the control unit H determines that the second on-off valve V2 is an open failure in the open-failure determination process, the control unit H performs an open-fault notification process for notifying that the second on-off valve V2 is an open failure. It is configured.
In this open failure notification process, the alarm lamp L1 of the alarm means L described above is turned on and the alarm buzzer L2 is operated for a set short time. In addition, the second on-off valve V2 is displayed on the display unit L3. An error code indicating an open failure is displayed.

  Furthermore, in this embodiment, after the control part H starts supply of the hot water to the washing | cleaning space Q where the hot water is discharged | emitted in the washing | cleaning process and a rinsing process, it is from the discharge water level Y1b for drying being detected. When the hot water storage elapsed time is greater than or equal to the first set time and less than or equal to the second set time, it is configured to execute a closed failure determination process for determining that the second on-off valve V2 is closed. In the determination process, the first open / close valve V1 is closed and it is determined that there is a failure when the discharge water level Y1b for drying is not detected even when the hot water storage elapsed time has passed the second set time.

  During the first set time, in a state where the second on-off valve V2 is not closed, the first on-off valve V1 and the second on-off valve V2 are opened, and supply of hot water to the cleaning space Q from which hot water has been discharged is started. Is longer than a first predicted time (for example, 11 seconds) required until the drying discharge water level Y1b is detected, and the first on-off valve V1 is opened and the second on-off valve V2 is closed. In a time (for example, 50 seconds) smaller than the second predicted time (for example, 6 minutes) required from the start of the supply of hot water to the discharged cleaning space Q until the drying discharge water level Y1b is detected. The second set time is set to a time (for example, 8 minutes) larger than the second predicted time.

  In addition, the control unit H performs a cleaning process or a rinsing process at every measurement timing when a set period (for example, 10 days) elapses from a reference time point when the power is turned on at the time of installation of the dishwasher or at the end of the maintenance. At the time of execution, the first on-off valve V1 and the second on-off valve V2 are opened, and the time from when the hot water is supplied to the cleaning space from which hot water has been discharged to when the cleaning water level Y2 is detected is determined. The measurement space Q is updated and stored as the first measurement value, and each time the cleaning process and the rinsing process are executed, the first on-off valve V1 and the second on-off valve V2 are opened, and the cleaning space Q in which the hot water is discharged. The time until the cleaning water level Y2 is detected after the hot water supply is started is measured and updated and stored as the second measured value.

  Incidentally, in the present embodiment, the case where the update storage of the first measurement value is performed only when the cleaning process is executed is illustrated, but the update storage of the first measurement value is performed for each of the cleaning process and the rinsing process. Alternatively, it may be performed only when the rinsing process is performed.

  Then, when the controller H determines that the second on-off valve V2 has a closed failure in the above-described closed failure determination process, the control unit H performs the measurement in the cleaning process when the second on-off valve V2 has determined to have a closed failure. The second measured value is normalized with the first measured value, and when the normalized value satisfies a criterion condition indicating that the second on-off valve V2 is closed, the second on-off valve V2 is closed. When it is determined that there is a failure and the determination criterion condition is not satisfied, a filter clogging determination process is executed in which it is determined that the second on-off valve V2 is not a closed failure and that the filter Vf installed in the water supply channel 4A is clogged. It is configured as follows.

  In the present embodiment, the normalized value obtained by dividing the first measured value by the second measured value measured in the cleaning process when it is determined that the second on-off valve V2 has a closed failure is obtained. When the division value is smaller than the determination reference value as the determination reference condition, the determination reference condition is satisfied, and it is determined that the second on-off valve V2 has a closed failure and is equal to or higher than the determination reference value. The second on-off valve V2 is not closed but is determined to be clogged with the filter Vf provided in the water supply channel 4A.

That is, the amount of hot water supplied to the cleaning space Q when the second on-off valve V2 is not closed and the filter Vf of the water supply path 4A is not clogged varies depending on the water supply pressure of the water supply source, for example, Since it is 5 L / min, the first measurement value is, for example, about 30 seconds.
Then, since the amount of hot water supplied to the cleaning space Q in the state where the second on-off valve V2 is in a closed failure is, for example, 0.15 / min, the second on-off valve V2 is in the state in which the second on-off valve V2 is in a closed failure. 2 The measured value is, for example, about 960 seconds, and the amount of hot water supplied to the cleaning space Q in a state where the filter Vf of the water supply channel 4A is clogged changes depending on the clogging condition. If it is 2.4 L / min, the second measured value is 60 seconds, which is a considerably smaller value than the state where the second on-off valve V2 is closed.

  Therefore, based on such a situation, it is possible to discriminate between the closed failure of the second on-off valve V2 and the clogging of the filter Vf in the water supply path 4A, for example, by setting the determination reference value as a value of 30/500. By setting the value, it is possible to determine whether the second on-off valve V2 is closed or whether the second on-off valve V2 is not closed but is clogged with the filter Vf provided in the water supply channel 4A.

  Incidentally, in normalizing the second measurement value with the first measurement value, the second measurement value may be divided by the first measurement value, and the normalized value is used as the second opening / closing valve V2. As a criterion condition for indicating that is a closed failure, a criterion value is set as in the case where the first measurement value is divided by the second measurement value and normalized.

And the control part H is comprised so that the alerting | reporting process which alert | reports the determination result of a closed failure determination process and the determination result of a filter clogging determination process may be performed.
This notification process notifies whether the second on-off valve V2 has a closed failure, whether the filter Vf provided in the water supply channel 4A is clogged, or whether the first on-off valve V1 has a closed failure, The above-described alarm lamp L1 of the alarm means L is turned on, and the alarm buzzer L2 is operated for a set short time. In addition, the display unit L3 indicates that the second on-off valve V2 has a closed failure. An error code, an error code indicating that the filter Vf provided in the water supply channel 4A is clogged, and an error code indicating that the first on-off valve V1 is closed are displayed.

Hereinafter, the control operation of the cleaning operation of the control unit H will be described based on the flowcharts of FIGS. 13 and 14.
First, hot water supply start processing for supplying hot water to the cleaning space Q is performed (# 20). In this hot water supply start process, as described above, the first on-off valve V1 and the second on-off valve V2 are opened, and hot water is supplied from the water supply port 5 into the cleaning space Q through the water supply passage 4A and the washing tank branch passage 4B. In addition to supplying hot water, hot water is supplied to the dehumidifying part G through the dehumidifying branch 4C, and hot water is supplied from the dehumidifying part G into the cleaning space Q through the air suction port 22.

  Next, a first timer for measuring the hot water storage elapsed time from the start of hot water supply to the cleaning space Q from which hot water has been discharged until the drying discharge water level Y1b is detected, and the hot water Processing for starting measurement of the second timer for measuring the time from the start of the supply of hot water to the discharged cleaning space Q to the detection of the cleaning water level Y2 is performed (# 21).

Thereafter, it is determined whether or not the water level detection sensor J has detected the drying discharge water level Y1b (# 22). When the drying discharge water level Y1b is detected, the first timer for measuring the hot water storage elapsed time is detected. The measurement operation is stopped (# 23).
Subsequently, whether or not the hot water storage elapsed time measured by the first timer satisfies the closed failure determination condition that is not less than the first set time (for example, 50 seconds) and not more than the second set time (for example, 8 minutes). Is determined (# 24), and if it is determined that the closed failure determination condition is satisfied, processing is performed to turn on the second on / off valve abnormality flag indicating that the second on-off valve V2 is closed. (# 25).

  Then, after executing the process of # 25 or when it is determined in the process of # 24 that the closed failure determination condition is not satisfied, the process for determining whether or not the water level detection sensor J has detected the cleaning water level Y2. (# 29).

When it is determined in # 22 that the drain discharge water level Y1b is not detected, whether or not the hot water storage elapsed time measured by the first timer exceeds the second set time (for example, 8 minutes) is determined. The determination is repeated (# 26).
When the hot water storage elapsed time exceeds the second set time, the first on-off valve V1 has a closed failure, so the operation stop process (# 27) for emergency stop of the operation and the first on-off valve V1 has a closed failure. The notification process (# 28) for notifying that is sequentially executed.
The operation stop process of # 27 is a process of closing the first on-off valve V1 and the second on-off valve V2 to stop the subsequent operation, and the notification process of # 28 operates the alarm means L. Thus, whether the first on-off valve V1 is closed or not is informed, and the details thereof are as described above, so the description thereof is omitted here.

The operation stop process of # 27 and the notification process of # 28 are performed until a reset command is instructed by, for example, pressing and holding two predetermined switches among a plurality of switches provided in the operation unit SS. Will continue.
That is, the user, when recognizing that the water leakage has occurred in the hot water leakage notification process, makes a maintenance call to a maintenance company, and then issues a reset command.
By the way, when an abnormality occurs that causes the first on-off valve V1 to close, a maintenance contractor performs an inspection / maintenance operation, and then the recovery contractor is instructed to the control unit H by the maintenance contractor. Until this time, the control unit H is configured not to execute the cleaning / drying operation according to a command from the operation unit SS.

  When it is determined at # 29 that the water level detection sensor J has detected the cleaning water level Y2, the first on-off valve V1 and the second on-off valve V2 are closed to stop the supply of hot water to the cleaning space Q. After the process is executed (# 30), the second timer for measuring the time from the start of the supply of hot water to the cleaning space Q where hot water is discharged until the time when the cleaning water level Y2 is detected is measured. A process of stopping the measurement operation and updating and storing the measurement value as the second measurement value is executed (# 31).

  Next, it is determined whether or not the second on-off valve abnormality flag is ON (# 32). If it is determined that the second on-off valve abnormality flag is not ON, the measurement timing when a set period (for example, 10 days) has elapsed from the reference time point. (# 33), and when it is the measurement timing, the measurement value of the second timer is updated and stored as the first measurement value (# 34).

When it is determined at # 32 that the second on-off valve abnormality flag is ON, the filter clogging determination process (# 35) and the notification process (# 36) are sequentially executed.
The filter clogging process of # 35 determines whether or not the second on-off valve V2 is not closed and is clogged with the filter Vf installed in the water supply channel 4A, and the details thereof are as described above. Therefore, explanation here is omitted.

The notification process of # 36 operates the alarm means L to notify whether the second on-off valve V2 is closed or whether the filter Vf provided in the water supply path 4A is clogged. Is the same as described above, and a description thereof is omitted here.
In addition, the # 36 notification process is continued until a reset command is issued by, for example, pressing and holding two predetermined switches among a plurality of switches provided in the operation unit SS.
That is, the user, when recognizing that the water leakage has occurred in the hot water leakage notification process, makes a maintenance call to a maintenance company, and then issues a reset command.

  When it is determined at # 33 that the measurement timing is not reached, or after the process of updating and storing the first measurement value of # 34 or the notification process of # 36 is executed, the dual-purpose pump 6 is set at the target rotational speed. Rolling driving and driving of the heater 9 are started (# 37). That is, the hot water for cleaning is ejected from the cleaning nozzle 8 while the hot water for cleaning is heated by the heater 9.

  Next, it is determined whether or not the elapsed time since the start of the cleaning operation has reached the set cleaning operation time, that is, whether or not the cleaning operation time has elapsed (# 38). If the operation time has elapsed, the dual-purpose pump 6 and the heater 9 are stopped (# 39), and then the process proceeds to the next process.

  As described above, in the cleaning operation, it is determined whether or not the first on-off valve V1 and the second on-off valve V2 are closed, and when it is determined that the second on-off valve V2 is closed, It is determined whether or not the second on-off valve V2 is not closed but is clogged with the filter Vf installed in the water supply channel 4A, and the first on-off valve V1 and the second on-off valve V2 are closed. When the filter Vf installed in the water supply channel 4A is clogged, the alarm means L is activated to perform a notification process for urging maintenance.

  And, in the rinsing operation and the heating rinsing operation as the rinsing process, the failure determination and the notification process are performed as in the cleaning operation, but the content is the same as the failure determination and the notification process in the cleaning operation. The description is omitted in this document.

  Next, the control operation of the drying operation of the control unit H will be described based on the flowchart of FIG.

First, a process of starting the operation of the heater 9 and the circulation fan 23 and starting the supply of dehumidified hot water is executed (# 41).
Subsequently, it is determined whether or not the combined use pump 6 is in the operation of the drainage operation for drying (# 42). If the drainage operation for drying is not in operation, immediately after the start of the drying operation or the drainage of drying operation It is determined whether it is immediately after the end of the operation (# 43).

If it is determined at # 43 that the drying operation has just started, or that the drying drainage operation has just ended, the timer for the elapsed time for drying is measured to measure the elapsed time for drying. It starts (# 44).
If it is determined at # 43 that it is not immediately after the start of the drying operation or immediately after the completion of the drying drainage operation, or after the processing of # 44 has been executed, whether or not the water level detection sensor J has detected the drying discharge water level Y1b. Is discriminated (# 45).
That is, in this embodiment, it is determined whether or not the water level detection sensor J has changed from a state in which the hot water discharge water level Y1a is detected to a state in which the hot water discharge water level Y1a is not detected.

If it is determined at # 45 that the discharge level is not the drying discharge water level Y1b, it is determined whether or not the elapsed time from the start of the drying operation has passed the set drying processing time (# 55). When the drying processing time has elapsed, the heater 9, the circulation fan 23, and the dual-purpose pump 6 are stopped, and the dehumidifying hot water supply is stopped (# 56), and the next operation is started. Will do.
If it is determined at # 55 that the set drying process time has not elapsed, the process proceeds to # 42.

When it is determined at # 45 that the discharge water level Y1b is for drying, it is determined whether or not the timer for elapsed time for drying is operating (# 46).
If it is determined at # 46 that the timer for elapsed time for drying is in operation, the measurement operation of the timer is stopped and the measured value is transferred to the cleaning space Q where hot water is discharged. A process of updating and storing is performed as the elapsed time for drying from the start of the supply of hot water until the water level detection sensor J detects the discharge water level Y1b for drying (# 47).
Incidentally, the timer for the elapsed time for drying is not only immediately after the completion of the drying drainage operation in # 43, but also when it is determined that it is immediately after the start of drying, the measurement is started. The measurement is started immediately after the drying operation is started following the washing drain operation in the heating rinse operation.

  After the processing of # 47, it is determined whether or not the elapsed time for drying is equal to or less than a set determination time (for example, 30 seconds) (# 48), and the elapsed time for drying is equal to or less than the set determination time. Then, the open failure notification process is executed (# 49), and then the process proceeds to # 50, where the dual-purpose pump 6 is started to be driven in reverse at the target rotational speed.

The notification process of # 49 is to notify that the second on-off valve V2 is in an open failure by operating the alarm means L, and the details thereof are as described above, so the description thereof is omitted here. To do.
In addition, the notification process of # 49 is continued until a reset command is instructed by, for example, pressing and holding two predetermined switches among a plurality of switches provided in the operation unit SS. .
In other words, when the user recognizes that the second on-off valve V2 has an open failure in the notification process, the user makes a maintenance call to a maintenance company or the like, and then issues a reset command.

  When it is determined at # 46 that the timer for the elapsed time for drying is not in operation, the routine proceeds to # 50, where the dual-use pump 6 is started to be driven in reverse at the target rotational speed, and the drying is started. In the case where the standard operation course of the continuous course is selected, etc., when it is determined that the drainage water level for drying is normally determined in # 45, the elapsed time for drying is used. Since the timer is in operation, the process of # 46 may be omitted.

  After the dual-purpose pump 6 is driven in reverse at # 50, it is determined whether or not it has changed from the drying discharge water level Y1b (# 51). That is, in the case of this embodiment, it is determined whether or not the water level detection sensor J has changed from a state in which the hot water discharge water level Y1a is not detected to a state in which the hot water discharge water level Y1a is detected.

If it is determined at # 51 that the discharge water level has changed from the drying discharge water level Y1b, it is determined whether or not the elapsed time from that time has passed a set time for dry drainage (for example, 15 seconds). If the set time for dry drainage has elapsed (# 53), the dual-purpose pump 6 is stopped (# 54), and then the process proceeds to # 55.
Also, if it is not determined in # 51 that the level has changed from the drying discharge water level Y1b, the process proceeds to # 55.

If it is determined at # 42 that the drainage operation for drying is being performed, it is determined whether or not it has already been determined that the change has occurred from the drying discharge water level Y1b (# 52).
When it is determined that the water level has already changed from the drying discharge water level Y1b, the process proceeds to # 53, and when it is determined that the water level has not yet changed from the drying water level Y1b, the process proceeds to # 51. become.

  As described above, in the drying operation, an open failure of the second on-off valve V2 is determined, and when the second on-off valve V2 is in an open failure, maintenance is performed by the operation of the alarm means L. An open failure notification process for prompting is performed.

As described above, in the present embodiment, when the open / close failure of the second on-off valve V2 is determined and a failure has occurred, a notification process for urging maintenance is executed by the operation of the alarm means L. However, in the present embodiment, the second on-off valve V2 is configured to be inspected and maintained satisfactorily.
That is, as shown in FIGS. 9 and 10, the second on-off valve V2 is configured such that the valve body portion 50A can be attached and detached while the valve housing 50 is incorporated in the flow path.

If it demonstrates, the 2nd on-off valve V2 will be comprised from the valve housing 50 integrated in the branch channel 4B for washing tanks, and the valve body part 50A with respect to the valve housing 50 being attached or detached.
Inside the valve casing 50, an upstream flow path side portion 51 </ b> A that is upstream from the valve seat 52 provided inside the valve casing 50 and a downstream flow path portion 51 </ b> C that is downstream from the valve seat 52 are provided. The provided flow path 51 is formed.

50 A of valve body parts are formed in the valve body 53 switched to the closed state which contacts the valve seat 52 of the valve housing 50, and the open state spaced apart from the valve seat 52, and the back part side of the valve body 53 is formed upstream. A back side pressure chamber 51B into which the fluid of the side flow path portion 51A flows and a valve operating body 54 are provided.
The valve body 53 is formed with a through hole 53b that communicates the back side pressure chamber 51B and the downstream flow path portion 51C, and the valve operating body 54 is configured to open and close the through hole 53b.

The valve body 53 is disposed so as to face the upstream portion 51A, is configured to be pressed to the side away from the valve seat 52 by the fluid pressure of the upstream portion 51A, and the upstream side flow of the valve body 53 A bleed hole 53a that guides the fluid in the upstream-side channel portion 51A to the back-side pressure chamber 51B is formed at a location facing the passage portion 51A.
When the valve operating body 54 closes the through hole 53b, the fluid in the upstream flow path portion 51A flows into the back side pressure chamber 51B, and the valve body 53 is operated to the closed state (see FIG. 9). On the other hand, when the valve operating body 54 opens the through hole 53b, the valve body 53 is operated to open by the fluid in the upstream flow path portion 51A (see FIG. 10).

  That is, when the valve operating body 54 is operated so as to close the through hole 53b, as shown by an arrow in FIG. 9, the back side pressure chamber from the upstream flow path portion 51A via the bleed hole 53a. The fluid (hot water) flows into 51B, the fluid pressure in the back side pressure chamber 51B increases, and the valve body 53 comes into contact with the valve seat 52. Therefore, the space between the upstream flow path portion 51A and the downstream flow path portion 51C in the valve casing 50 is closed, and the supply of hot water is stopped.

When the valve operating body 54 is operated so as to open the through-hole 53b, the back-side pressure chamber 51B communicates with the downstream-side flow passage portion 51C through the through-hole 53b, and the back-side pressure chamber 51B. Since the internal fluid pressure is lower than that of the upstream flow path portion 51 </ b> A, the valve body 53 is operated to the open state, and the valve body 53 is opened to be separated from the valve seat 52. Therefore, as shown by an arrow in FIG. 10, the upstream flow path portion 51A and the downstream flow path portion 51C in the valve casing 50 are connected, and hot water is supplied.
That is, the second on-off valve V2 is configured in a so-called pilot valve system.

When each part is described, a valve seat contact portion 53c that is in close contact with the valve seat 52 is provided at a portion of the valve body 53 that faces the valve seat 52. A contact portion 54b that comes into contact with the through hole 53b is provided at an end portion on the body 53 side.
The solenoid 55 that operates the valve operating body 54 is directed toward the state that opens the through hole 53b against the return biasing force of the spring 56 that returns and biases the valve operating body 54 toward the state that closes the through hole 53b. The valve operating body 54 is provided to operate.
Therefore, by energizing the solenoid 55 and operating the valve operating body 54, the second on-off valve V2 is switched to the open state, and by stopping energization of the solenoid 55, the second on-off valve V2 is switched to the closed state. It is configured.

  By the way, the flow rate of hot water flowing through the washing tank branch 4 </ b> B is flown at the upstream side of the valve housing 50, although the flow rate is sufficiently larger than the flow rate of hot water flowing through the dehumidification branch 4 </ b> C. A constant flow valve V4 that restricts the set amount is provided, and a filter 57 that prevents foreign matter from flowing into the second on-off valve V2 is provided in the constant flow valve V4.

  Then, a valve body portion 50A of the illustrated second on-off valve V2 is connected to a valve body casing 58 that is detachably bolted to the valve housing 50, a valve body 53, a valve operating body 54, a solenoid 55, a spring 56, and the like. Is constructed so that the maintenance work of the second on-off valve V2 can be performed while the valve body casing 58 is attached to and detached from the valve housing 50.

[Another embodiment]
In the above embodiment, the first on-off valve V1 and the second on-off valve V2 are opened as the first measurement value and the second measurement value to be measured and updated for the filter clogging determination process, and hot water is discharged. The case where the time until the cleaning water level Y2 is detected after the supply of hot water to the cleaning space is measured and updated and stored is illustrated, but instead, this is implemented in the form described below. May be.

  That is, the first open / close valve V1 and the second open / close valve V2 are opened and the hot water is discharged as the first measurement value and the second measurement value that are measured and updated for the filter clogging determination process. Alternatively, the time from when the hot water supply is started to when the drying discharge water level Y1b is detected may be measured and updated and stored.

  In this case, since the hot water storage elapsed time measured for performing the open failure determination process becomes a value corresponding to the first measurement value and the second measurement value, the first measurement value and the second measurement value are separately measured. Therefore, the measured hot water storage elapsed time can be updated and stored as the first measurement value and the second measurement value, and the overall configuration can be simplified.

[Other alternative embodiments]
Next, other embodiments are listed.
(A) In the above embodiment, the drawer-type dishwasher in which the washing tank is provided so as to be freely drawn out and stored in the horizontal direction with respect to the main body case part is illustrated, but the washing tank is accommodated in the main body case part. The present invention can also be applied to a dishwasher in which the washing space of the washing tub is opened and closed by opening and closing the front door of the main body case.

(B) In the above embodiment, the drain pump is driven by a DC motor. However, the drain pump may be driven by an AC motor. In this case, for example, the cleaning pump is set to a target rotational speed. The driving power supplied to the AC motor may be adjusted by phase control.

(C) In the above embodiment, a dual-purpose pump that functions as a cleaning pump in forward rotation and functions as a drainage pump in reverse rotation is illustrated. However, the present invention may be implemented in a form in which a cleaning pump and a drainage pump are provided separately.

(D) As a water level detection means, it can replace with the water level detection sensor as described in the said embodiment, and can apply the thing of a various form.

4A Water supply channel 4B Cleaning tank branch 4C Dehumidification branch 5 Water supply port 6 Drain pump 9 Heating means 21 Air supply port 22 Air suction port 23 Ventilation means D Washing tank E Hot water intermittent means F Ventilation path G Dehumidification part H Control means J Water level detection means Q Cleaning space V1 First on-off valve V2 Second on-off valve V3 Constant flow valve Y2 Cleaning water level Y1b Drying discharge water level

Claims (4)

A water supply port for supplying hot water for cleaning and rinsing into the cleaning space of the cleaning tank;
By cooling the air in the cleaning space circulated by the ventilation means through the ventilation path extending from the air suction port to the cleaning space and the air supply port to the cleaning space by contact with hot water for dehumidification, A dehumidifying part configured to condense and dehumidify moisture in the air, and to flow the dehumidified hot water and condensed water into the washing tank;
Heating means for heating the air in the cleaning space;
Hot water intermittent means for intermittently supplying hot water to the water supply port and intermittently supplying hot water to the dehumidifying section;
A drainage pump for sucking hot water from the bottom of the washing space and discharging it to the outside;
A water level detecting means for detecting that the level of hot water stored in the cleaning space is a cleaning water level and a drying discharge water level lower than the cleaning water level;
A cleaning unit that cleans an object to be cleaned in the cleaning space, a rinsing process for rinsing the object to be cleaned, and a control unit that executes a drying process for drying the object to be cleaned;
The control means is
In the cleaning process and the rinsing process, the hot water intermittent means is controlled based on the detection information of the water level detecting means to store the hot water of the cleaning water level in the cleaning space and perform cleaning and rinsing, and , After the cleaning process and the rinsing process, in order to discharge the hot water stored in the cleaning space, to perform a cleaning drain operation that operates the drain pump, and
In the drying treatment, the heating means, the heating means, and the air passing through the ventilation path are brought into contact with the hot water for dehumidification and the air passing through the ventilation path. When the hot water intermittent means is controlled and the water level detecting means detects the water level for drying, the water draining operation for operating the water pump is repeated to discharge the hot water at the water level for drying. A dishwasher configured as follows:
The hot water interrupting means is branched from a first on-off valve for opening and closing a water supply path connected to a water supply source, a washing tank branch path branched from the water supply path and connected to the water supply port, and the water supply path. Of the dehumidifying branch connected to the dehumidifying section, a second on-off valve that opens and closes the cleaning tank branch, and the first on-off valve and the second open / close equipped on the dehumidifying branch. A constant flow valve that restricts the flow rate of hot water flowing through the dehumidifying branch path to be less than the flow rate of hot water flowing through the washing tank branch path when the valve is open;
The control means is
When supplying hot water in the cleaning process and the rinsing process, open the first on-off valve and the second on-off valve, and when supplying hot water in the drying process, open the first on-off valve; and Configured to close the second on-off valve; and
In the cleaning process and the rinsing process, the hot water storage elapsed time from the start of supplying hot water to the cleaning space from which hot water has been discharged until the drying discharged water level is detected is equal to or longer than a first set time. And when it is equal to or shorter than the second set time, it is configured to execute a closed failure determination process for determining that the second on-off valve is closed.
In the state where the first on-off valve is not closed, the first on-off valve and the second on-off valve are opened to start supplying hot water to the cleaning space from which hot water is discharged. The cleaning is performed for a longer time than the first estimated time required for detecting the level of drainage discharged water, and opening the first on-off valve and closing the second on-off valve to discharge hot water. It is set to a time shorter than the second predicted time required from the start of hot water supply to the space until the drying discharge water level is detected, and the second set time is longer than the second predicted time. A dishwasher as defined in   In the closed failure determination process, when the hot water storage elapsed time has passed the second set time and the drying discharge level is not detected, the control means determines that the first on-off valve is closed. The dishwasher of claim 1 configured to determine. The control means is
The cleaning space in which hot water is discharged by opening the first on-off valve and the second on-off valve when executing the cleaning process or the rinsing process at every measurement timing when a set period elapses from a reference time point. Measuring the time from the start of the supply of hot water to the time when the discharge water level for drying or the water level for washing is detected, updated and stored as a first measured value, and
Each time the cleaning process and the rinsing process are performed, the first on-off valve and the second on-off valve are opened, and the supply of hot water to the cleaning space from which hot water has been discharged is started. It is configured to measure the time until the discharged water level or the cleaning water level is detected, and update and store the second measured value, and
When it is determined in the closed failure determination process that the second on-off valve has a closed failure, the second time measured in the cleaning process or the rinsing process when it is determined that the second on-off valve has a closed failure. When the measurement value normalized by the first measurement value satisfies a criterion for indicating that the second on-off valve is in a closed failure state, it is determined that the second on-off valve is in a closed failure. In addition, when the determination criterion condition is not satisfied, a filter clogging determination process is performed to determine that the second on-off valve is not in a closed failure but is clogged in the filter provided in the water supply channel. The dishwasher according to claim 1 or 2.   The dishwasher according to claim 3, wherein the control means is configured to execute a notification process for notifying a determination result of the closed failure determination process and a determination result of the filter clogging determination process.

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