JPH0732757B2 - Dishwasher - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a dishwasher for washing dishware stored in a washing cabinet by jetting washing water.

[Prior Art] FIG. 5 shows a configuration of a dishwasher that uses a wash water supply device such as a circulation pump to move a jet nozzle to the left and right to jet wash water to dishes in a washing cabinet for washing. It is sectional drawing which shows an example. In the figure, (1) is a washing cabinet, (2) is a basket in which dishes (14) are stored and which is stored and taken out from an opening (not shown) provided in the washing cabinet (1), and (3) is a water supply port , (4) are electromagnetic on-off valves that open and close the wash water supplied to the water supply port (3). (5) is an injection nozzle for ejecting the cleaning water pumped by the circulation pump (6) through the circulation passage (7) while moving horizontally, and (8) is a residue for adhering to the dishes. Primary filter, (9) a secondary filter provided in the drainage sump (10), (11) a drainage pump for discharging the wash water to the outside after washing the dishes, (12) The drain, (13) is a drainage channel.

Next, the operation will be described based on the above configuration. First, the electromagnetic on-off valve (4) is opened to allow a predetermined amount of water to flow into the washing chamber (1) through the water supply port (3) and then closed, and the circulation pump (6) is driven to drive the circulation passage (7). ), The washing water is pressure-fed to the nozzle (5), and the washing water ejected from the jet nozzle (5) removes the residue attached to the tableware (15),
The residue that has fallen together with the wash water is captured by the primary filter (8), and the wash water passed here is again discharged from the nozzle (5) through the circulation path (7),
Cleaning is performed.

When the washing for a predetermined time by the circulation of the washing water is completed, the circulation pump (6) is stopped and the drainage pump (11) is driven to discharge the used washing water to the outside through the drainage port (12). To do. In this case, since the residue remaining in the primary filter (8) flows into the secondary filter (9) and accumulates, the secondary filter (9) is taken out of the drainage sump (10) after the washing water is discharged, and the residue remains. By removing the water, it is possible to circulate clean cleaning water for the next use to efficiently perform the cleaning and to keep the inside of the cleaning chamber clean.

[Problems to be Solved by the Invention] In the conventional dishwasher as described above, the residue remaining in the secondary filter (9) must be removed each time the dishes are washed, unless the secondary filter (9) is removed. The residue remaining inside will clog the flow path to block the flow path, and the drainage pump (11) will not be able to completely discharge the wash water after use.
Further, the used cleaning water remains at the bottom of the cleaning cabinet (1) and the cleanliness cannot be maintained, and the remaining used cleaning water is mixed in the next cleaning water to reduce the cleaning ability. There are problems such as.

The present invention has been made to solve the above problems, and when the amount of the residue accumulated in the secondary filter reaches a predetermined amount, this can be easily confirmed and the residue can be immediately removed to maintain high cleanliness. Moreover, it is an object of the present invention to obtain a dishwasher which does not reduce the cleaning ability of the next time by completely discharging the washing water after use.

[Means for Solving the Problems] In the dishwasher according to the present invention, a sensor including a light emitting unit and a light receiving unit for detecting the amount of residue trapped in the secondary filter is arranged at a predetermined position of the drainage pool. At the same time, an informing unit is provided which is controlled by the output of this sensor and notifies that there is a residue.

[Operation] In the present invention, the amount of residue in the secondary filter of the drainage puddle, which becomes a clogging after use for draining, is detected in advance by the sensor, and the notification means is activated by the output of the sensor. As a result, by detecting that there is a residue in the secondary filter of the drainage pool and removing the residue, the wash water after use is completely discharged without clogging.

[Embodiment] FIG. 1 is a longitudinal sectional view of an embodiment of the present invention.
(14) to (14) indicate the same or corresponding portions as the portions having the same reference numerals in FIG. 5 showing the conventional example. FIG. 2 is a vertical cross-sectional view showing details of the drainage sump (10) shown in FIG.

In FIGS. 1 and 2, (16) and (17) are a pair of optical sensors, (16) is its light emitting part, and (17) is, for example,
It is a light receiving part composed of CdS etc.
It is fixed in close contact with the hole provided facing the wall of (0). (18) is a lead wire for connecting the light emitting part (16) to a power source,
(19) is a lead wire connected to a detection unit such as a relay (not shown), (20) is attached to the outer wall of the drainage sump (10), and the lead wire (21) is used to detect the operation of the detection unit. It is a blinking indicator lamp.

Next, the operation will be described based on the above configuration. First, similar to the operation in the conventional example, the solenoid on-off valve (4) is opened,
A predetermined amount of water is made to flow into the washing chamber (1) through the water supply port (3), and the washing water pumped by the drive of the circulation pump (6) is ejected from the nozzle (5), and the dishes (15) Wash off the residue adhering to the filter and leave it on the primary filter (8).
The circulation of the wash water passed is repeated to complete the washing of the tableware (15). Then, when the drainage pump (11) is driven, the residue remaining on the primary filter (8) flows into the drainage sump (10) through the drainage port (12) together with the used cleaning water,
The used cleaning water passed through the secondary filter (9) in the drainage sump (10) is drained to the outside, and the residue remains in the secondary filter (9).

When the residue accumulated in the secondary filter (9) accumulates to a height that blocks the light beam from the light emitting portion (16) of the optical sensor to the light receiving portion (17) as shown by the chain line in FIG.
The detection value of the light amount of the light receiving section (17) changes, and the display lamp (20) blinks by the operation of a relay or the like (not shown) in the detection section according to the change of the detection value.

The user who sees the blinking of the display lamp (20) knows that the residue removed from the tableware has accumulated in the secondary filter (9) in a predetermined amount or more, and the secondary filter is supplied from the drainage pool (10). If (9) is pulled out and the residue is removed, the secondary filter (9) will not be clogged with the residue and all the used cleaning water can be discharged to the outside.

FIG. 3 is a vertical sectional view of another embodiment of the present invention. In the figure, (1a) is the main body of the washing machine, (1) is the main body of the washing machine (1
In the washing room provided in a), the water supply port (3) is provided at the top, and the water supply port (25) for circulating the wash water and the drain port (26) for discharging the waste water are provided at the bottom. ) With a concave first drain sump (27). (8) is a primary filter detachably set in the upper opening of the first drainage sump (27). (28) is a solenoid valve (4)
A water supply hose, one end of which is connected to the water supply port (3) through the other end, is extended to the outside of the main body of the washing machine (1a) and is connected to a water tap or the like. (6) is a circulation pump connected to the water supply port (25), and its output side is connected to the injection nozzle (5) via the pipe (7). (5a) is a plurality of injection ports provided in the injection nozzle (5). (29) is a first end whose one end is connected to the drainage port (26) of the first drainage sump (17).
Of the washing machine body (1a) via the second drainage pipe (13) and the drainage pump (30). (31) is an opening provided in the washing machine body (1a), (32)
Is a door that opens and closes this opening (31), (2) is tableware (1
It is a basket for storing 4) and is accommodated in the cleaning cabinet (1) through the opening (31) along the rail provided in the cleaning cabinet (1).

(10) is an opening (31) on the outside of the main body of the washing machine (1a)
The second drainage reservoir provided below the first drainage reservoir (26) of the first drainage reservoir (27) and the drainage inlet (33) of the second drainage reservoir (10) are the first drainage reservoir. They are connected by a pipe (29), and the drain outlet (34) of the second drain sump (10) is the second
Of the washing machine main body (1a) through the drainage pump (30), and is led to a kitchen sink, for example. The second drainage sump (10) may be provided at another position, and the second drainage pipe (13) may be provided.
The drain pump (30) may be provided outside the main body of the washing machine (1a). (9) is a secondary filter arranged in the second drainage sump (10), which is connected to the inlet (33) to which the first drainage pipe (29) is connected and which contains wastewater. Are fed into the secondary filter (9).

FIG. 4 is an enlarged sectional view of the second drainage sump (10).
Reference numeral (35) is a lid that is attached to and detached from the opening of the second drainage sump (10) and is integrally provided with the secondary filter (9).
(36) is the permanent magnet embedded in the lid (35), (37) is the second
The reed switch is provided on the upper part of the drainage sump (10) so as to face the permanent magnet (36), and its output terminal is connected to a control circuit section (not shown).

Next, the operation of this embodiment will be described. Circulation pump (6)
The wash water pumped by is jetted from the jet port (5a), and the jet nozzle (5) is spun by the reaction force to the tableware (14) while rotating. When the tableware (14) is washed and the washing water containing the residue is drained to complete all the steps, the residue is accumulated in the secondary filter (9). In order to treat this residue, the secondary filter (9) together with the lid (35) is taken out from the second drainage sump (10) and the residue is discarded.

At this time, since the permanent magnet (36) moves, the reed switch (37) attached to the second drain sump (10) operates (the switch is turned on or off). This signal is input to the control circuit unit to store the presence / absence of attachment / detachment of the secondary filter (9). If the secondary filter (9) is left as it is and the cleaning is started again without treating the residue, the reed switch (37) and the permanent magnet (36) are removed between the end of the previous cleaning and the next cleaning. ) And the control circuit section detects that no change has occurred, and notifies the user. As the notification means, for example, an appropriate means such as blinking a lamp that sounds a buzzer can be used. It should be noted that when the residue is processed, the reed switch (37) and the permanent magnet (36) are changed, so that no notification is given.

[Effects of the Invention] As described above, according to the present invention, the residue adhering to the tableware is poured into the drainage pool together with the wash water after use after cleaning, and the residue collected in the secondary filter in the drainage pool. Is detected by the sensor when it exceeds a predetermined amount, and the output of the sensor activates the notification means to detect that there is a residue in the secondary filter and prompt the removal of the residue in the secondary filter. Therefore, there is no clogging due to the residue when draining, and the wash water after use can be completely discharged to the outside. Therefore, there is an effect that the cleanliness in the washing cabinet can be kept high and the circulation pump can be efficiently operated with clean washing water in the next use.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing the structure of a dishwasher according to an embodiment of the present invention, and FIG. 2 is a vertical sectional view showing a main part of FIG.
FIG. 3 is a vertical cross-sectional view of another embodiment of the present invention, FIG. 4 is a cross-sectional view of a main portion thereof, and FIG. 5 is a vertical cross-sectional view showing a configuration example of a conventional dishwasher. In the figure, (1) is a washing cabinet, (1a) is a washing machine main body,
(5) is an injection nozzle, (6) is a circulation pump, (7) is a circulation path, (8) is a primary filter, (9) is a secondary filter,
(10) is a drainage sump, (16) is a light emitting part, (17) is a light receiving part, (20) is an indicator lamp, (35) is a lid, (36) is a permanent magnet, and (37) is a reed switch. The same reference numerals in the drawings indicate the same or corresponding parts.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-62-201130 (JP, A) Actually opened 50-95857 (JP, U) Actually opened 57-81763 (JP, U)

Claims (1)

[Claims] 1. A washing cabinet having a spray nozzle for spraying the wash water toward the tableware, and a primary unit installed in a circulation path for sending the wash water to the spray nozzle to capture the residue washed off from the tableware. A filter, a drainage sump provided in the drainage passage of the used wash water discharged from the bottom of the washing chamber to the outside, and a secondary trapping the residue passed through the primary filter housed in the drainage sump. In a dishwasher equipped with a filter, a sensor for detecting the amount of residue trapped in the secondary filter arranged at a predetermined position of the drainage pool, and an output controlled by the sensor, and there is residue A dishwasher characterized by being provided with an informing means for informing.