JP5770529B2 - Dishwasher - Google Patents

Description

The present invention sucks hot water stored in the cleaning space and discharges it from the cleaning outlet by means of hot water intermittent means for intermittently supplying hot water to the cleaning space of the cleaning tank and forward / reverse switching of the rotation direction of the impeller. A first state where the cleaning discharge port is opened and the cleaning discharge port is opened and the external discharge port is closed. And a dual-purpose pump provided with valve means that can be switched to a second state in which the cleaning discharge port is closed and the external discharge port is opened, and stored in the cleaning space. A water level detecting means for detecting that the level of the hot and cold water to be cleaned is a cleaning water level, a cleaning process for cleaning the cleaning object in the cleaning space, a rinsing process for the cleaning object, and the cleaning object Drying process to dry And control means for performing is provided,
In the cleaning process and the rinsing process, the control means controls the hot water intermittent means based on detection information of the water level detection means so as to store hot water of the cleaning water level in the cleaning space, and In order to eject hot water from the washing nozzle, the dual-purpose pump is configured to operate in the washing state, and after the washing treatment and the rinsing treatment, the hot water stored in the washing space is to be discharged. The present invention also relates to a dishwasher configured to execute a washing drain operation for operating the dual-purpose pump in a hot water discharge state.

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.

  And in such a dishwasher, in the cleaning process and the rinsing process, hot water at the cleaning water level is stored in the cleaning space based on the detection information of the water level detecting means, and the dual-use pump is operated in the cleaning state. In addition, in the cleaning drain operation after the cleaning process and the rinsing process, the dual-purpose pump is configured to operate in a hot water discharge state in order to discharge the hot water stored in the cleaning space. (For example, refer to Patent Document 1).

  Although there is no detailed description of the dual-purpose pump in Patent Document 1, the dual-purpose pump sucks hot water stored in the cleaning space and discharges it from the cleaning discharge port by forward / reverse switching of the rotation direction of the impeller. A first state that can be switched between a cleaning state and a hot water discharge state in which hot water stored in the cleaning space is sucked and discharged to the external discharge port, and the cleaning discharge port is opened and the external discharge port is closed, and the cleaning state There is provided valve means that can be switched to a second state in which the discharge port is closed and the external discharge port is opened by the hot water flow pressure accompanying the rotation of the impeller (for example, see Patent Document 2).

JP 2010-233651 A JP 2008-38743 A

When the impeller of the dual-use pump is rotated in the cleaning state, the valve means is switched to the first state in which the cleaning discharge port is opened and the external discharge port is closed by the hot water flow pressure accompanying the rotation. In the first state, there is a possibility that an abnormality in which the external outlet is not properly closed by the valve means due to the biting of foreign matter such as dust.
If the external discharge port is not properly closed, the hot water stored in the cleaning space flows out from the external discharge port, so that the cleaning process and the rinsing process cannot be performed properly due to the lack of hot water stored in the cleaning space. There is a fear.

  Therefore, in the cleaning process and the rinsing process, if there is an abnormality that the hot water stored in the cleaning space flows out from the external discharge port, it is necessary to hurry and make a maintenance call to a maintenance contractor to perform inspection and maintenance. The occurrence of such an abnormality is difficult for the user to understand, so there is a possibility that the cleaning process and the rinsing process cannot be performed properly, and may continue to be used. It was desired.

  The present invention has been made in view of the above circumstances, and its purpose is to provide a dishwasher capable of avoiding continuous use in a state where the cleaning process and the rinsing process cannot be performed properly. The point is to provide.

The dishwasher of the present invention comprises hot and cold intermittent means for intermittently supplying hot water to the washing space of the washing tank,
By switching forward / reverse in the rotation direction of the impeller, the hot water stored in the cleaning space is sucked and discharged from the cleaning discharge port, and the hot water stored in the cleaning space is sucked and discharged to the external discharge port. It is switchable between a hot water discharge state, a first state in which the cleaning discharge port is opened and the external discharge port is closed, and a second state in which the cleaning discharge port is closed and the external discharge port is opened. A dual-purpose pump provided with valve means switchable by the hot and cold fluid pressure accompanying the rotation of the impeller;
A water level detecting means for detecting that the level of hot water stored in the cleaning space is a 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 at the cleaning water level in the cleaning space, and the hot water is supplied from the cleaning nozzle. The dual-purpose pump is configured to operate in the cleaning state to be ejected; and
After the cleaning process and the rinsing process, a cleaning drain operation for operating the dual-purpose pump in a hot water discharge state is performed in order to discharge the hot water stored in the cleaning space. The first characteristic configuration is
Detecting that the water level detecting means, said hot water in the water level reserved in the washing space is a hot water discharge level lower than the level at which low KuKatsu the purpose pump than the washing water level is activated in the cleaning state Configured to
The control means is
In the cleaning process and the rinsing process, when the hot water discharge water level is detected by the water level detection means, an external discharge port abnormality notification process for notifying that the hot water leaks from the external discharge port is executed. It is characterized by being configured as follows.

  That is, when the control means detects a hot water discharge water level lower than the cleaning water level by the water level detection means in the cleaning process and the rinsing process, the external discharge port for notifying that there is a leakage of hot water from the external discharge port An abnormality notification process is executed.

That is, in the cleaning process and the rinsing process, when the dual-purpose pump is operated in the cleaning state, the level of the hot water stored in the cleaning space is the level of the hot water discharge level if the external outlet is properly closed by the valve means. However, when the water level of hot water stored in the cleaning space drops to the hot water discharge water level, the external outlet is not closed by the valve means as appropriate. Then, the external discharge port abnormality notification process is executed.

  Incidentally, in the cleaning process and the rinsing process, when the dual-purpose pump operates in the cleaning state, the hot water level in the cleaning space is ejected from the cleaning nozzle, so that the hot water level in the cleaning space is slightly lower than the cleaning water level. Therefore, the hot water discharge water level is set to a lower water level than the water level when the dual-purpose pump is operated in the cleaning state.

  In short, according to the first characteristic configuration of the present invention, it is possible to provide a dishwasher capable of avoiding continuous use in a state where the cleaning process and the rinsing process cannot be performed properly.

The second feature configuration of the present invention is in addition to the first feature configuration described above.
Below the washing tank, a drain pan for receiving water leakage is provided,
Water leakage detection means for detecting the presence or absence of hot water collected and collected by the drain pan is provided,
The control means is
When the water leak detection means detects the presence of hot water, it executes hot water leak notification processing for notifying that there is a hot water leak, and
In the case where the water leakage detection means does not detect the presence of hot water, the external discharge port abnormality notification process is executed when the hot water discharge water level is detected by the water level detection means in the cleaning process and the rinsing process. It is characterized by being configured as described above.

That is, when the control means detects that there is hot water collected and received in the drain pan for receiving water leak arranged below the washing tank by the water leak detection means, it is notified that there is a leak of hot water. The hot water leak notification process is performed.
The control means executes the external outlet abnormality notification process when the water level detection means detects the hot water discharge water level in the cleaning process and the rinsing process when the water leakage detection means does not detect the presence of hot water. It will be.

In other words, when hot water leaks from the cleaning tank or piping, the hot water is received and collected in the drain pan for receiving water leaked below the cleaning tank. Thus, the presence of hot water is detected and the hot water leak notification process is executed.
Therefore, the user recognizes that there is an abnormal state in which hot water leaks from the cleaning tank and piping by the hot water leak notification process, makes a maintenance call to the maintenance company, etc., and the hot water from the cleaning tank and piping etc. The abnormal condition that leaks will be resolved.
By the way, when there is an abnormality that causes hot water to leak from the washing tank or piping, etc., in addition to executing the hot water leak notification process, a leak handling process is performed in which the hot water intermittent means is closed and the drain pump is operated in the hot water discharge operation state. It is preferable that this is performed automatically.

When the water leakage detection means does not detect the presence of hot water and the hot water discharge water level is detected by the water level detection means in the cleaning process and the rinsing process, the external discharge port is not properly closed by the valve means. Assuming that the state is in the state, the external outlet abnormality notification process is executed.
In other words, when there is no abnormality in which hot water leaks from the cleaning tank, piping, etc., when the hot water discharge level is detected by the water level detection means in the cleaning process and the rinsing process, the external discharge port is appropriate. Assuming that the valve is not closed by the passage means, the external outlet abnormality notification process is executed.

  Thus, by performing hot water leak notification processing, it is possible to eliminate the abnormal state in which hot water leaks from the cleaning tank and piping, etc., and when there is no abnormality in which hot water leaks from the cleaning tank and piping, In the cleaning process and the rinsing process, when the hot water discharge water level is detected by the water level detection means, the abnormality that the hot water leaks from the external discharge port can be eliminated by performing the external discharge port abnormality notification process.

  In short, according to the second characteristic configuration of the present invention, in addition to the operational effects of the first characteristic configuration, in the abnormality that hot water leaks from the cleaning tank, piping, etc., and in the cleaning process and the rinsing process, the hot water is supplied from the external outlet. It is possible to provide a dishwasher that can eliminate abnormalities that leak.

In addition to the first or second feature configuration described above, the third feature configuration of the present invention includes:
The valve means of the dual-purpose pump is elastically biased to the first state.

  That is, since the valve means of the dual-use pump is elastically biased to the first state in which the cleaning discharge port is opened and the external discharge port is closed, the hot water flow pressure accompanying the rotation of the impeller is weak, such as immediately after the impeller starts rotating. Even in the state, the valve means is maintained in the first state, and unnecessary discharge of hot water from the external discharge port can be suppressed.

  That is, in the cleaning process and the rinsing process, when storing hot water at the cleaning water level in the cleaning space, or immediately after starting to operate the dual-purpose pump in the cleaning state in order to eject hot water from the cleaning nozzle, The valve means is accurately maintained in the first state, and it is possible to suppress unnecessary discharge of hot water from the external discharge port.

Then, after the cleaning process and the rinsing process, when the cleaning drain operation is performed in which the dual-purpose pump is operated in the hot water discharge state in order to discharge the hot water stored in the cleaning space, the valve means rotates the impeller. The hot water flow pressure is switched to the second state where the cleaning discharge port is closed and the external discharge port is opened against the elastic biasing force.
Incidentally, when the hot water flow pressure accompanying the rotation of the impeller is weak, such as immediately after the combined pump is started to operate in the hot water discharge state, the valve means is maintained in the first state, and the washing discharge Hot water is unnecessarily discharged from the outlet, but since the hot water discharged from the cleaning outlet is jetted from the cleaning nozzle to the cleaning space, the dual-purpose pump must be operated in the hot water discharge state. When hot water is unnecessarily discharged from the cleaning outlet immediately after starting the operation, there is no problem that the hot water cannot be discharged.

  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 dishwasher can appropriately suppress unnecessary discharge of hot water from the external discharge port. Can provide.

In addition to any of the first to third feature configurations described above, the fourth feature configuration of the present invention includes:
The control means is
When the cleaning drainage operation is executed for a set time, if the water level detection means detects a water level higher than the hot water discharge water level, it is used for notifying that there is a leakage of hot water from the cleaning outlet. It is characterized by being configured to execute the discharge port abnormality notification process.

  That is, when the drainage operation for cleaning is executed for a set time, and the water level detection means detects a water level higher than the hot water discharge water level, the cleaning discharge port for notifying that the hot water leaks from the cleaning discharge port The abnormality notification process is executed.

  In other words, when the washing and draining operation is performed for the set time described above, if there is no leakage of hot water from the cleaning outlet, the water level in the cleaning space is lower than the hot water discharge level. By setting the predetermined time, when the drainage operation for cleaning is executed for the set time, when the water level detecting means detects a level higher than the hot water discharge water level, it is assumed that the hot water leaks from the cleaning outlet. The cleaning discharge port abnormality notification process is executed.

  Thus, when the cleaning / drainage operation is executed, even if the set time has elapsed, if the water level detecting means detects that the water level is higher than the hot water discharge water level, the cleaning discharge port abnormality notifying process is executed. Therefore, the user recognizes that there is an abnormal state in which hot water leaks from the cleaning discharge port, and makes a maintenance call to a maintenance company etc. to eliminate the abnormal leakage of hot water from the cleaning discharge port. .

  In short, according to the fourth feature configuration of the present invention, in addition to the operational effects of any of the first to third feature configurations described above, it is possible to provide a dishwasher that can eliminate abnormalities in which hot water leaks from the cleaning outlet. .

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 Block diagram showing control configuration Notched plan view of dual-purpose pump Notched plan view of the pump Notched plan view of the pump Notched side view of the pump Flow chart showing control operation of washing and drying operation Flow chart showing control operation of timer interrupt processing Flow chart showing control operation of cleaning operation Flow chart showing control operation of washing drain 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 V2; And a hot water intermittent means for intermittently supplying hot water to the water supply port 5 and intermittently supplying hot water to the dehumidifying part G from the first on-off valve V1, the second on-off valve V2, and the constant flow valve V3. E 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 sufficiently higher than a flow rate of hot water flowing through the dehumidification branch 4C (for example, 200 ml / min). Although it is a large flow rate, a constant flow valve V4 that restricts the excessive flow rate to be suppressed is provided in a state of being integrated.

  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.

  Moreover, as shown in FIG.2 and FIG.3, under the bottom part of the washing tank D in the drawer | drawing-out part 2, the combined use pump 6 which functions as a washing pump by forward rotation and functions as a drainage pump by reverse rotation is provided. Inside the washing space Q of the washing tank D, a washing nozzle 8 and an electric heater 9 as a heating means are arranged, and a washing basket 10 for storing and placing a washing object such as tableware is washed. It is detachably mounted inside the tank 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.

  In this embodiment, when the cleaning level Y2 is detected by the water level detection sensor J, 2.4 L (liter) of hot water is stored in the cleaning space Q, and hot water is discharged from that state. When the discharged water level Y1a is detected by the water level detection sensor J, hot water corresponding to 0.9 L (liter) remains in the cleaning space Q (stored).

As shown in FIG. 2, a drain pan 14 for receiving water leakage is provided at the bottom of the main body 1, and water leakage is detected as water leakage detecting means for detecting the presence or absence of hot water received and collected by the drain pan 14. Sensor Z is equipped.
That is, the drain pan 14 is arranged so as to be positioned below the cleaning tank D in the state where the drawer part 2 is housed in the main body part 1, and the cleaning tank D, the dual-purpose pump 6 and the cleaning nozzle 8 are arranged. When hot water leaks from pipes such as pipes that connect the two, the hot water is received and collected.

The water leakage sensor Z is equipped with a pair of electrodes 15 that come into contact with the collected hot water when the drain pan 14 collects more than a set amount of hot water, and the pair of electrodes 15 is added to the hot water collected in the drain pan 14. By being connected, the drain pan 14 is configured to detect that hot water has been collected.
Incidentally, in the present embodiment, in order to reduce power consumption, the pair of electrodes 15 are energized at a set cycle (for example, 500 ms), and the pair of electrodes 15 are made conductive by the hot water collected in the drain pan 14. It is determined whether or not.

When the dual-purpose pump 6 is described, as shown in FIG. 13, a DC motor 6a for driving the impeller 6A is mounted on the upper part of the pump casing 6B that houses the impeller 6A.
As shown in FIGS. 10 to 12, the pump casing 6 </ b> B includes a water inlet 16 connected to the water storage recess S of the cleaning tank D, a cleaning outlet 17 connected to the cleaning nozzle 8, and a drain pipe. 12 is formed in the pump casing 6B. The pump casing 6B has a first state in which the cleaning discharge port 17 is opened and the external discharge port 18 is closed, and the cleaning discharge port 17 is closed. A valve body 19 is provided as a valve means that can be switched to the second state in which the external discharge port 18 is opened by the hot water flow pressure accompanying the rotation of the impeller 6A.

The impeller 6A is in a cleaning state (see FIG. 10) in which hot water stored in the cleaning space Q is sucked and discharged from the cleaning discharge port 17 when the forward rotation is driven. It is configured to be in a hot water discharge state (see FIG. 12) in which the stored hot water is sucked and discharged to the external discharge port 18.
Incidentally, the rotation of the combined pump 6 corresponds to the rotation of the impeller 6A, and the driving of the impeller 6A by the DC motor 6a corresponds to the driving of the combined pump 6 by the DC motor 6a. Become.

The valve body 19 is pivotally supported so as to be switched between a first state and a second state, and a torsion coil spring 19A for elastically urging the valve body 19 to the first state is provided at the pivotal support portion.
And the receiving part 19a which receives the hot-water flow pressure accompanying the rotation when the impeller 6A is reversely driven is projected from the tip of the valve body 19.
Therefore, when the impeller 6A is driven in reverse when the valve body 19 is in the first state, the receiving portion 19a receives hot water flow pressure accompanying the rotation of the impeller 6A as shown in FIG. The body 19 is configured to accurately switch to the second state.

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. 9, the control unit H, based on a command input from the operation unit SS, a DC motor 6 a that drives 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. The drying operation as a drying process for performing the dehumidifying hot water jetting operation and the electric heater 9 being stopped, the ventilation operation of the circulation fan 23 and the dehumidifying hot water from the jet nozzle 25 It is configured to perform deodorization operation of a deodorizing process to perform an outgoing operation.

In addition, while the power is supplied, the control unit H instructs the drive circuit 15A for the pair of electrodes 15 of the water leakage sensor Z to energize every set cycle (for example, 500 ms), so that the pair of electrodes 15 It is configured to repeat the water leakage presence / absence detection process for determining whether or not the hot water collected in the drain pan 14 is conducting.
And the control part H stops the supply of the hot water to the washing tank D and the dehumidification part G which alert | reports that it is a leak of hot water, and the washing tank D, when the water leak sensor Z detects presence of hot water. The leak handling process for operating the hot and cold intermittent means E and reversely driving the dual-purpose pump 6 is executed as will be described in detail later.

In FIG. 9, 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 determine the 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.

In FIG. 9, 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. 9, N is a storage switch that detects that the drawer 2 is stored in the storage position of the main body 1, 9 A is a drive circuit for the heater 9, and 23 A is a drive voltage for the circulation fan 23. It is the circulation fan drive circuit to adjust.

Next, the cleaning / drying 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.

Based on the flowchart of FIG. 14, the control operation of the control unit H that performs the cleaning and drying operation will be described.
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 pump 6 is rotated forward and the heater 9 is operated, and the cleaning operation for spraying the cleaning water from the cleaning nozzle 8 toward the object to be cleaned is performed until the set cleaning operation time elapses. It will be.
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 combined 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 heated, the circulation fan 23 is ventilated and the dehumidifying hot water is ejected from the ejection nozzle 25, and the state is set and dried. 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, with the electric heater 9 being stopped, the circulation fan 23 is ventilated and the ejection nozzle 25 is ejected with dehumidifying water. For example, it is performed until 15 minutes).
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 the drainage operation is performed by reversing the operation of the dual-purpose pump 6, and the deodorizing drainage after the water level detection sensor J detects the drying discharge water level Y1 b. This is performed continuously until a set time for use (for example, 15 seconds) elapses.

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. The temperature is low (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. As a result, a large amount of air in the cleaning space Q contracts rapidly, and the cleaning space Q In some cases, the internal pressure of 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. The lid body 42 is equipped in a state of being conducted with hot water stored in the hot water storage tank 40 when the set amount becomes higher than the water level Y2 (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 repeats the water leakage presence / absence detection process every set cycle (for example, 500 ms) while the power is supplied, and the water leakage sensor Z detects the presence of hot water. When it does, it is comprised so that a hot water leak notification process and a leak countermeasure process may be performed, and the control action | operation is demonstrated based on the flowchart of FIG.

The hot / cold water presence / absence detection process is configured as a timer interrupt process for each set period (for example, 500 ms).
That is, at a set cycle (for example, 500 ms), energization of the pair of electrodes 15 of the water leakage sensor Z is started (# 21), and then the pair of electrodes 15 is conducted with the hot water collected in the drain pan 14. In order to determine whether or not they are in contact with each other, a resistance value between the pair of electrodes is measured (# 22).

  Next, based on the measurement result of # 22, it is determined whether or not the water leakage sensor Z has detected the presence of hot water, that is, whether or not there is hot water (# 23). 15 is stopped (# 27), and then the process before the timer interruption is started.

  In the process of # 23, when it is determined that there is hot water, the hot water leak notification process (# 24) for notifying that the hot water has leaked, and the hot water intermittent means E are closed and the combined pump 6 is driven in reverse. The leakage handling process (# 25) is executed.

  In the hot water leak notification process of # 24, 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, and in addition, water leakage has occurred in the display unit L3. An error code indicating an abnormality is displayed.

In the # 25 leak handling process, when the washing / drying operation is in progress, all the processes are stopped at that time, and the hot water intermittent means E is closed to avoid further leakage of hot water. In addition, the dual-purpose pump 6 is driven to rotate in reverse both during the cleaning / drying operation and not during the cleaning / drying operation.
Incidentally, the dual-purpose pump 6 is stopped when a set time (for example, 1 minute) for measures against water leakage elapses.

The hot water leak notification process of # 24 and the leak response process of # 25 are performed by, for example, pressing and holding two predetermined switches among a plurality of switches provided in the operation unit SS. This is continued until commanded (# 26).
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, in the case of an abnormality in which water leakage has occurred, after maintenance work is performed by a maintenance company or the like, until the restoration command is issued to the control unit H by the maintenance company or the like, the control unit H Is configured not to execute the cleaning / drying operation according to a command from the operation unit SS.

  In addition, although the hot water leak notification process can be stopped also by stopping the power supply to the dishwasher, in the present embodiment, the control unit H includes a nonvolatile memory and an abnormality in which water leaks has occurred. Is stored in association with the occurrence date and time, and when power is supplied again, the error code indicating that the water leak has occurred is displayed on the display unit L3. Is configured to display.

  Further, as described above, the dishwasher of this 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, when the controller H detects the hot water discharge water level Y1a by the water level detection sensor J in the cleaning operation, the rinse operation, and the heating rinse operation, it is a leakage of hot water from the external discharge port 18 of the dual-purpose pump 6. It is configured to execute an external discharge port abnormality notifying process for notifying.

The external discharge port abnormality notification process will be described based on the flowchart shown in FIG.
First, hot water supply start processing for supplying hot water to the cleaning space Q is performed (# 31). 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, it is determined whether or not the water level detection sensor J has detected the cleaning water level Y2 (# 32). If it is determined that the cleaning water level Y2 has been detected, the first on-off valve V1 and the second on-off valve V2 are detected. And the supply of hot water to the cleaning space Q is stopped (# 33).
Subsequently, the dual-purpose pump 6 is driven to rotate forward at the target rotational speed and the heater 9 is started to be driven (# 34). 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.

  Thereafter, it is determined whether or not the hot water discharge water level Y1a is detected by the water level detection sensor J (# 35). If the hot water discharge water level Y1a is not detected, the cleaning operation is started. It is determined whether or not the elapsed time has reached the set cleaning operation time, that is, whether or not the cleaning operation time has elapsed (# 37). If the cleaning operation time has elapsed, The dual-purpose pump 6 and the heater 9 are stopped (# 38), and then the process proceeds to the next process.

In the process of # 35, when it is determined that the hot water discharge water level Y1a is detected, the external discharge port abnormality notification process for notifying that the hot water leaks from the external discharge port 18 of the dual-purpose pump 6 is executed. (# 36).
In this external discharge port abnormality 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 external discharge port 18 is displayed on the display unit L3. An error code indicating that there is an abnormality in which hot water leaks from is displayed.

  Incidentally, when the external discharge port abnormality notification process is executed, the user recognizes that there is an abnormal state in which hot water leaks from the external discharge port 18 and makes a maintenance call to a maintenance company or the like. Note that the external outlet abnormality notification process is similar to the hot water leak notification process described above, for example, by pressing and holding a predetermined two of the plurality of switches provided in the operation unit SS. It can be stopped by giving a command.

As described above, in the cleaning operation, when the water level detection sensor J detects the hot water discharge water level Y1a before the cleaning operation time elapses, an external outlet abnormality notification process for urging maintenance is performed.
Further, in the rinsing operation and the heating rinsing operation, the external discharge port abnormality notification process is performed, but the content thereof is the same as that of the cleaning operation, and thus detailed description thereof is omitted.
Incidentally, as described above, the washing operation, the rinsing operation, and the heating rinsing operation are executed when the leakage sensor Z does not detect the presence of hot water, and are not executed when the leakage sensor Z detects the presence of hot water. The external discharge port abnormality notification process is executed when the leak sensor Z does not detect the presence of hot water, and is not executed when the leak sensor Z detects the presence of hot water.

Further, the control unit H is configured to execute a cleaning discharge port abnormality notification process for notifying that there is a leakage of hot water from the cleaning discharge port 17 in the cleaning drain operation.
Specifically, when the washing / drainage operation is performed for a set time (for example, 30 seconds) for washing / draining, and the water level detection sensor J detects a water level higher than the hot water discharge water level Y1a, the washing discharge The cleaning discharge port abnormality notifying process for notifying that the hot water leaks from the outlet 17 is executed.

  Hereinafter, the control operation of the cleaning drain operation of the control unit H will be described based on the flowchart of FIG.

First, the dual-purpose pump 6 is started to be driven in reverse (# 41).
Next, it is determined whether or not a set time for cleaning drainage (for example, 30 seconds) has elapsed (# 42), and if a set time for cleaning drainage (for example, 30 seconds) has elapsed, Subsequently, it is determined whether or not the water level detection sensor J detects the hot water discharge water level Y1a (# 43).

  In the process of # 43, when it is determined that the water level detection sensor J has detected the hot water discharge water level Y1a, the combined use pump 6 is stopped assuming that the hot water has been discharged properly (# 46), and thereafter The process proceeds to the next process.

  In the process of # 43, when it is determined that the water level detection sensor J does not detect the hot water discharge water level Y1a, hot water at a water level higher than the hot water discharge water level Y1a is stored in the cleaning space Q. Therefore, a cleaning discharge port abnormality notification process for notifying that the hot water leaks from the cleaning discharge port 17 is executed (# 44), and an additional operation time (for example, 15 seconds) continues. (# 45), and then shifts to the process of # 46, and the dual-purpose pump 6 is stopped.

  In the cleaning discharge port abnormality 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 cleaning discharge port is displayed on the display unit L3. An error code indicating that the hot water leaks from 17 is displayed.

  Incidentally, when the cleaning discharge port abnormality notifying process is executed, the user recognizes that the hot water leaks from the cleaning discharge port 17 and makes a maintenance call to a maintenance company or the like. Note that the cleaning discharge port abnormality notification processing is performed in the same manner as the hot water leak notification processing described above, for example, by pressing and holding two predetermined switches among a plurality of switches provided in the operation unit SS. Can be stopped by commanding.

  As described above, in the cleaning / drainage operation, when a set time for cleaning / drainage (for example, 30 seconds) has elapsed, if the water level detection sensor J detects a water level higher than the hot water discharge water level Y1a, maintenance is performed. In order to prompt, a cleaning discharge port abnormality notification process for notifying that the hot water leaks from the cleaning discharge port 17 is performed.

  Incidentally, in this embodiment, when a water level higher than the hot water discharge water level Y1a is detected by the water level detection sensor J when a set time for cleaning and draining (for example, 30 seconds) has elapsed in the cleaning and draining operation. In this example, the case where it is determined that there is a leakage of hot water from the cleaning discharge port 17 is shown. However, when a time shorter than the set time for cleaning drainage (for example, 30 seconds) has elapsed, for example, the cleaning discharge When there is no leakage of hot water from the outlet 17, a time (for example, 15 to 20 seconds) required for the hot water in the cleaning space Q to be discharged to the water level corresponding to the hot water discharge water level Y1a by the cleaning / drainage operation has elapsed. When the water level detection sensor J detects a water level higher than the hot water discharge water level Y1a, it may be determined that the hot water leaks from the cleaning outlet 17.

In addition, in this embodiment, when performing the discharge outlet abnormality notification process for cleaning, the case where it is configured to wait until the additional operation time elapses and discharge hot water as much as possible is illustrated. When the time (for example, 30 seconds) elapses, the dual-purpose pump 6 may be stopped immediately.
Similarly to the present embodiment, when the combined discharge pump 6 is additionally operated when the cleaning discharge port abnormality notification process is performed, the combined discharge pump 6 until the hot water discharge water level Y1a is detected by the water level detection sensor J. 6 may be implemented.

[Another embodiment]
In the above embodiment, when the controller H detects the hot water discharge water level Y1a even once by the water level detection sensor J before the cleaning operation time elapses in the cleaning operation, the external discharge of the combined pump 6 is performed. Although the case where it was comprised so that the external discharge port abnormality notification process which alert | reports that it was the leak of the hot water from the exit 18 was illustrated was illustrated, it can change as follows.

That is, when the controller H detects the hot water discharge water level Y1a by the water level detection sensor J before the cleaning operation time elapses in the cleaning operation, the set amount (for example, 0.1 to 0.3 liters). ), And when the hot water discharge water level Y1a is detected, an external discharge port abnormality notification process for notifying that the hot water leaks from the external discharge port 18 of the dual-purpose pump 6 is performed. It may be configured to execute.
Further, when the hot water discharge water level Y1a is detected after performing the additional water injection, the additional water injection is configured to be executed a plurality of times, and after the additional water injection is repeated a plurality of times. When the hot water discharge water level Y1a is detected, the external discharge port abnormality notification process may be executed.

  In this way, if a structure for performing additional water injection is adopted, in the case where bubbles are generated by the cleaning detergent until the cleaning operation time elapses after the start of the cleaning operation, Even if the water level is lowered due to the fact that hot water for cleaning is used, it is possible to avoid erroneous detection of leakage of hot water from the external discharge port 18 of the dual-purpose pump 6.

[Other alternative embodiments]
Next, other alternative embodiments are listed.
(A) In the above embodiment, the hot and cold intermittent means includes a first on-off valve that opens and closes the water supply channel, a second on-off valve that opens and closes the branch for the cleaning tank, and a constant flow valve equipped in the dehumidification branch However, in addition to these valves, an opening / closing valve for opening / closing the dehumidifying branch may be provided.
And when providing the on-off valve which opens and closes the dehumidification branch path, you may implement by the form which abbreviate | omits the 1st on-off valve which opens and closes a water supply path.

(B) In the above embodiment, the drawer type dishwasher in which the cleaning 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 cleaning tank is stored 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.

(C) In the above embodiment, the case where the impeller of the dual-purpose pump is driven by the direct current motor is exemplified. However, the impeller of the dual-purpose pump may be driven by the alternating current motor. In order to drive the impeller at a set target rotation speed, the driving power supplied to the AC motor may be adjusted by phase control.

(D) In the above embodiment, the case where a single valve body is provided as the valve means provided in the dual-purpose pump is exemplified. However, as the valve means, a valve body portion for opening and closing the cleaning discharge port and an external discharge port are provided. You may implement in the form provided with the valve body part to open and close separately.

(E) In practicing the present invention, various forms of water level detection means can be applied instead of the water level detection sensor described in the above embodiment.

6 Combined pump 6A Impeller 8 Cleaning nozzle 14 Drain pan 17 Cleaning outlet 18 External outlet 19 Valve means D Cleaning tank E Hot water intermittent means H Control means J Water level detecting means Q Cleaning space Z Water leakage detecting means

Claims (4)

Hot water intermittent means for intermittently supplying hot water to the cleaning space of the cleaning tank;
By switching forward / reverse in the rotation direction of the impeller, the hot water stored in the cleaning space is sucked and discharged from the cleaning discharge port, and the hot water stored in the cleaning space is sucked and discharged to the external discharge port. It is switchable between a hot water discharge state, a first state in which the cleaning discharge port is opened and the external discharge port is closed, and a second state in which the cleaning discharge port is closed and the external discharge port is opened. A dual-purpose pump provided with valve means switchable by the hot and cold fluid pressure accompanying the rotation of the impeller;
A water level detecting means for detecting that the level of hot water stored in the cleaning space is a 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 at the cleaning water level in the cleaning space, and the hot water is supplied from the cleaning nozzle. The dual-purpose pump is configured to operate in the cleaning state to be ejected; and
A dishwasher configured to execute a washing drain operation for operating the dual-use pump in a hot water discharge state to discharge hot water stored in the washing space after the washing process and the rinsing process. Because
Detecting that the water level detecting means, said hot water in the water level reserved in the washing space is a hot water discharge level lower than the level at which low KuKatsu the purpose pump than the washing water level is activated in the cleaning state Configured to
The control means is
In the cleaning process and the rinsing process, when the hot water discharge water level is detected by the water level detection means, an external discharge port abnormality notification process for notifying that the hot water leaks from the external discharge port is executed. Dishwasher that is configured to. Below the washing tank, a drain pan for receiving water leakage is provided,
Water leakage detection means for detecting the presence or absence of hot water collected and collected by the drain pan is provided,
The control means is
When the water leak detection means detects the presence of hot water, it executes hot water leak notification processing for notifying that there is a hot water leak, and
In the case where the water leakage detection means does not detect the presence of hot water, the external discharge port abnormality notification process is executed when the hot water discharge water level is detected by the water level detection means in the cleaning process and the rinsing process. The dishwasher of Claim 1 comprised as follows.   The dishwasher according to claim 1 or 2, wherein the valve means of the dual-purpose pump is elastically biased to the first state. The control means is
When the cleaning drainage operation is executed for a set time, if the water level detection means detects a water level higher than the hot water discharge water level, it is used for notifying that there is a leakage of hot water from the cleaning outlet. dishwasher according to claim 1, which is configured to perform the discharge port abnormality notifying process.

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