JP3281862B2 - Dishwasher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a dishwasher,
More specifically, the present invention relates to a dishwasher that heats water stored in a washing room to make it hot water, and uses the hot water to wash dishes and the like housed in the washing room. The dishwasher of the present invention can be applied to a dishwasher that continuously performs not only washing but also drying.

[0002]

2. Description of the Related Art FIG. 5 is a side sectional view showing the structure of a conventional general dishwasher. A cleaning chamber (also serving as a drying chamber) 2 is disposed inside the machine casing 1, and a door 3 whose lower end is pivotally supported is provided at a front opening of the cleaning chamber 2 in a forward direction (FIG. 5).
In the left direction). A rotatable nozzle arm 4 is provided at the center of the bottom of the cleaning chamber 2, and an injection hole 5 is formed on the upper surface thereof at a predetermined angle. A circulation port 7 and a drain port 8 are provided at the bottom of the cleaning chamber 2.
Is disposed in communication with a water storage tank 6 provided on a side of the water storage tank 6, that is, between the upper surface of the water storage tank 6, that is, the washing chamber 2, for collecting residual vegetables that have flowed down from tableware. Is provided.

A washing and drainage pump 10 is disposed below the bottom of the washing chamber 2.
The water sucked from the water is sent to the nozzle arm 4 and the water sucked from the drain port 8 of the water storage tank 6 is drained at the time of drainage.
Discharge to the outside through 1. On the other hand, water supplied from outside via the water supply valve 12 is poured into the cleaning chamber 2 from a water supply port 13 provided behind the cleaning chamber 2. A water level detection chamber 14 having a float (not shown) for detecting the water level in the cleaning chamber 2 is disposed behind the cleaning chamber 2, and the water in the cleaning chamber 2 passes through a communication port (not shown). Water level detection room 1
Also flows into 4. Furthermore, a loop-shaped sheath is provided at the bottom of the cleaning chamber 2 to make a large orbit around the rotation axis of the nozzle arm 4 to warm the cleaning water and the rinsing water and to increase the temperature of the air in the cleaning chamber 2 during drying. A heater 15 is provided.

When washing dishes using the dishwasher, the user stores the dishes in a dish basket (not shown).
The door 3 is opened and the dish basket is set in the washing room 2. When cleaning is started, the water supply valve 12 is opened, and a predetermined amount of water is stored in the bottom of the cleaning chamber 2 and the water storage tank 6. This water is heated to a predetermined temperature (usually about 60 ° C.) by the sheath heater 15. When the washing / draining pump 10 is driven, the washing / draining pump 10 sucks hot water from the circulation port 7 of the water storage tank 6 and sends it out to the nozzle arm 4. The water rushes out of the small-diameter injection hole 5, and the nozzle arm 4 rotates by the reaction of the water injection. As a result, the water hits the tableware and flows down to the bottom of the washing chamber 2, and solids are removed by the filter 9 and circulated to the water storage tank 6. When the washing for a predetermined time (about 10 minutes) is completed, the washing and drainage pump 10 discharges the water sucked from the drainage port 8 of the water storage tank 6 to the drainage hose 11 and discharges the water at the bottom of the washing chamber 2.

[0005] Thereafter, the water supply valve 12 is opened, clean water for rinsing is newly introduced into the cleaning chamber 2, and rinsing is performed for about one minute in the same manner as at the time of cleaning. After rinsing with water is repeated two or three times, water is introduced into the cleaning chamber 2, and the water is heated to a temperature of about 70 to 80 ° C. by the sheath heater 15. Then, final rinsing is performed with the hot water. Thereby, the tableware can be sterilized, and the tableware is warmed, so that quick drying can be performed at the time of the next drying operation. After the final rinsing, the water at the bottom of the washing chamber 2 is discharged, and the dishes in the washing chamber 2 are heated by the sheath heater 15 to dry the dishes.

[0006] In this manner, in the dishwasher having the above structure, a series of operations from washing to drying are automatically performed.
For this reason, the user only has to perform the operation of storing the dirty dishes in the washing room and the operation of taking out the dishes after the completion of the washing and drying, thereby saving labor for housework.

[0007]

In the above-mentioned conventional dishwasher, the sheathed heater 15 is disposed at the bottom of the washing chamber 2, so that there is no danger of the user touching the sheathed heater 15 during normal work. However, for example, immediately after the end of the washing / drying operation, the sheath heater 15 itself is still hot. Therefore, for example, if a child or the like accidentally inserts his / her hand into the washing chamber 2, there is a risk of burns. Therefore, in order to further enhance safety, the user can easily set the sheath heater 15.
It is desirable that the structure be such that it cannot be touched. On the other hand, some commercially available dishwashers have, for example, a structure in which a heater 15 is disposed inside the water storage tank 6. However, the complexity of such a structure increases costs. Further, there is a problem that the efficiency in the drying operation is deteriorated as compared with the case where a heater is installed in the cleaning chamber 2.

Further, in a conventional dishwasher, for example, a plastic fork, spoon or the like drops from a dish basket and comes into contact with the heater and is melted and deformed. For this reason, the gap between the baskets is narrowed so that the objects do not fall from the baskets, and as a result, water does not easily pass through and the washing performance is sacrificed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and its object is to further enhance the safety for the user and to dissolve even if synthetic resin tableware or the like falls. It is an object of the present invention to provide a dishwasher capable of avoiding the problem.

[0010]

Means for Solving the Problems, Embodiments of the Invention, and Effects of the Invention The present invention, which has been made to solve the above-mentioned problems, mainly includes a cleaning chamber provided with water injection means,
A water tank communicating with the bottom wall of the chamber and water is supplied to the washing chamber.
Water supply means, and water flowing from the washing chamber into the water storage tank.
Water circulating means for sucking water and sending it to the water injection means.
The water in the washing chamber by water injected from the water injection means.
A dishwasher that cleans objects to be washed
There are, the savings have a lower bottom surface than the bottom wall of the washing chamber
A water reservoir connected to the water tank is formed, and a heater is arranged in the water reservoir.
As well as pulling large solids that have fallen off
Attach a heater cover for hanging and collecting on the upper surface of the water reservoir
It is characterized in that the.

In this configuration, when a predetermined amount of water is supplied into the cleaning chamber by the water supply means, the water flows into the water storage tank through the water storage section, and the water is stored in at least the water storage tank and the water storage section. Since the heating means is immersed in the stored water, the water is efficiently heated by the heating means. The heated water is sucked by the water circulation means and ejected from the water injection means,
After hitting the object to be cleaned, it falls to the bottom of the cleaning chamber. At that time, large solids that have flowed down from the object to be washed are trapped and trapped in the water holes of the cover. The cover is detachable, so when a lot of dust gets on the cover,
The user can easily remove and clean the cover and maintain cleanliness.

Thus, in the dishwasher according to the present invention,
Even if the user puts his hand in the cleaning chamber before the heating means cools down, the cover prevents the hand from touching the heating means, so that high safety can be ensured. Also,
Even when synthetic resin tableware falls from the tableware basket, the tableware does not directly contact the heating means, so there is no risk of melting or deformation due to heat. Further, according to this configuration, it is not necessary to store water in the entire bottom of the cleaning chamber, and it is sufficient to supply water at least in a state where water is stored in the water reservoir, so that there is an effect that the amount of water required for cleaning and rinsing is small. .

In the above construction, the water reservoir is formed along the side wall or the rear wall of the cleaning chamber, and has a shape depressed with a predetermined inclination from the bottom wall surface of the cleaning chamber. In this case, the shape is a flat plate shape so as to ride on a substantially horizontal step formed on the side wall or the rear wall, while, on the predetermined inclined side, the lower edge is bent downward so as to contact the inclined wall. Configuration. According to such a configuration, when the lower edge of the cover on the inclined wall side descends along the inclined wall, the cover is pressed toward the side wall or the rear wall of the cleaning chamber. It is stably held on the step, making it difficult to drop.

A supporting member for supporting the heating means is attached to the bottom surface of the water reservoir, and the upper portion of the supporting member is protruded above the heating means, while the cover is provided at a position corresponding to the projecting portion of the supporting member. It is preferable to have a configuration in which a bulge is formed upward. That is, in this configuration, when the cover is mounted on the upper surface of the water reservoir, the positioning can be performed by the projecting portion of the support member and the bulging portion of the cover,
It can be easily mounted at a predetermined position. Further, after the mounting, it is possible to prevent the cover from being displaced even if, for example, the pressure of flowing water is applied during water supply.

Further, it is preferable that a predetermined gap is provided between the edge of the cover and the bottom surface of the water reservoir on the downstream side of the water reservoir (that is, on the side closer to the water reservoir). That is, in this configuration, the small solid matter that has entered the water reservoir through the water passage hole of the cover rides on the water flow and flows out of the water reservoir from the gap. Therefore, it is possible to prevent dust from collecting in the water reservoir.

If the gap is made large enough to allow a finger to be inserted, the work of removing the cover when the user removes the cover becomes easy. In order to prevent a finger inserted at the time of removing the cover from touching the heating means, it is preferable that the heating means is formed in a retreated shape at that portion.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a dishwasher according to the present invention will be described below with reference to the drawings. FIG. 1 is a top plan view showing a part of the inside of the washing chamber of the dishwasher according to the present embodiment, FIG. 2 is a sectional view taken along line A1-A2 in FIG. 1, and FIG. 3 is a sectional view taken along line B1-B2 in FIG. In the drawings, these are cut-out portions of the left rear portion of the cleaning chamber 2.

As shown in FIGS. 1 and 3, the corner portion surrounded by the rear wall 21 and the side wall 22 of the cleaning chamber 2 is one step lower than the surface of the substantially flat bottom wall 23. A basin 24 is formed to be elongated along the side wall 22 of the cleaning chamber 2, and a side wall 26 of the basin 24 opposite to the side wall 22 of the cleaning chamber 2 is formed on the bottom wall 23 of the cleaning chamber 2 with a gentle inclination. It is connected. The bottom surface of the water reservoir 24 is gently downwardly inclined toward a connecting portion between a water storage tank (not shown) disposed in front (left side in FIG. 1) and the cleaning chamber 2. The heater mounting bracket 25 is fixed to the.

As shown in FIG. 3, the heater mounting bracket 25 includes two heater retainers 25a having a substantially semicircular cross section,
The positioning protrusion 25b of the heater cover 27 described later is integrated with the heater cover 27. The sheath heater 15, the end of which extends through the rear wall 21 of the cleaning chamber 2 and protrudes to the rear, is gripped by a heater holder 25 a of a heater mounting bracket 25, whereby the heater 15 is moved to the bottom of the cleaning chamber 2. The wall 23 is stably supported at a position below the height of the horizontal plane.

A detachable heater cover 27 made of a metal plate (punched metal) having a large number of water holes is mounted on the upper opening of the water reservoir 24. In FIG. 1, only a part of the water passage hole of the heater cover 27 is described for easy understanding of the configuration inside the water reservoir 24, but actually the water passage hole is provided on the entire upper surface. I have.

As shown in FIGS. 2 and 3, the heater cover 27 has a flat plate shape on two sides in contact with the rear wall 21 and the side wall 22 of the cleaning chamber 2, and has an L-shaped cross section facing the two sides. It is folded into a shape. (Note that in FIGS. 2 and 3, the bent portion on the side of the inclined side wall 26 of the water reservoir 24 is
The bent portion on the water tank (not shown) is indicated by 29. In addition, an engagement projection 30 that engages with the projection 25b of the heater mounting bracket 25 is formed to bulge upward substantially at the center of the upper surface. Further, in each of the bent portions 28 and 29 having the L-shaped cross section, the vertical width near the center is narrower than that near both ends.

As shown in FIG. 4, the edge of the heater cover 27 is formed into a shape combining a bent portion 32 with a step and a folded portion 33 at the end, as shown in FIG.
Since the structure is such that the cut piece of the metal plate is not exposed, safety when the user touches with a finger is ensured.

When the heater cover 27 is placed on the water reservoir 24 so that the engagement projection 30 of the heater cover 27 and the projection 25b of the heater mounting bracket 25 are engaged, the heater cover 27
Are placed on the horizontal step 31 at the connecting portion between the rear wall 21 and the side wall 22 of the washing chamber 2 and the water reservoir 24, while the bent portion 28 contacts the inclined side wall 26 of the water reservoir 24. . Accordingly, the position of the heater cover 27 is stabilized, and the once mounted heater cover 27 does not shift. At this time, as shown in FIG. 2, the vicinity of the center of the bent portion 28 has a narrow width as described above, so that it does not contact the inclined side wall 26, and a predetermined gap is formed. The other bent portion 29 having the L-shaped cross section does not contact the bottom surface of the water reservoir 24,
A gap is open throughout.

In the above configuration, the water supply port 13 for supplying water from the outside to the cleaning chamber 2 is provided on the rear wall 21 of the cleaning chamber 2, and the water discharged from the water supply port 13 is supplied to the bottom wall of the cleaning chamber 2. 1 flows as shown by the arrow C in FIG. 1 and flows into the water reservoir 24, and flows into the water reservoir (not shown) through the water reservoir 24. The bottom of the water reservoir 24 is the bottom wall 2 of the cleaning chamber 2.
3 and a predetermined amount of water
The water supply can be stopped in a state where the water is stored in the water reservoir 24 to such an extent that the entire sheathed heater 15 is immersed in the water (for example, position D in FIG. 3).
That is, since it is not necessary to store water in the entire bottom of the cleaning chamber 2 as in the related art, the amount of water required for cleaning and rinsing is reduced.

When a heating current is supplied from the outside to the sheath heater 15 in a state where the water is stored as described above, the stored water is heated to become hot water. When a cleaning / draining pump (not shown) is driven, the water sucked from the water storage tank is jetted from the injection hole 5, and the nozzle 4 is rotated by the force of the water. The water that has been sprayed and falls on the bottom of the washing chamber 2 upon hitting the tableware or the like flows into the water reservoir 24 in the same manner as the water supplied earlier,
It returns to the water storage tank via the water reservoir 24. At this time, large solids mixed in the water are caught without passing through the water holes of the heater cover 27. In addition, small solids that pass through the water holes and large solids that pass through the gap between the lower edge of the bent portion 28 of the heater cover 27 and the inclined side wall 26 enter the water reservoir 24, Bent portion 29 of heater cover 27
Since there is a predetermined gap between the bottom edge of the water reservoir 24 and the bottom surface of the water reservoir 24, most of the solid matter exits the water reservoir 24 by riding the flow of water.

When cleaning the heater cover 27 itself, the user easily removes the heater cover 27 by inserting a finger into the gap at the lower edge of the bent portion 29 of the heater cover 27 and lifting it up. be able to. Inside the gap at the lower edge of the bent portion 29, the sheathed heater 15 is bent right into a U-shape and recedes. Therefore, even if the user inserts his / her finger into the gap, the user does not touch the heater 15, and even if such an action is performed before the heater 15 cools, the safety of the user can be ensured. I have.

The above embodiment is merely an example, and it is apparent that modifications and changes can be made as appropriate within the scope of the present invention.

[Brief description of the drawings]

FIG. 1 is a top plan view showing a part of the inside of a washing chamber of a dishwasher according to one embodiment of the present invention.

FIG. 2 is a sectional view taken along line A1-A2 in FIG.

FIG. 3 is a sectional view taken along line B1-B2 in FIG.

FIG. 4 is a cross-sectional view showing the structure of the edge of the heater cover in the embodiment.

FIG. 5 is a side sectional view showing the configuration of a conventional general dishwasher.

[Description of Signs] 2 ... Cleaning chamber 4 ... Nozzle arm 5 ... Injection hole 6 ... Water tank 10 ... Cleaning and drainage pump 15 ... Seed heater 24 ... Water reservoir 25 ... Heater mounting bracket 26 ... Inclined side wall 27 ... Heater cover 28, 29… Bend

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2-185223 (JP, A) JP-A-11-206683 (JP, A) JP-A-11-151190 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) A47L 15/42

Claims (5)

(57) [Claims] 1. A cleaning chamber provided with a nozzle-shaped water injection means, a water storage tank communicating with a bottom wall of the cleaning chamber, a water supply means for supplying water to the cleaning chamber, and a water stored in a bottom of the cleaning chamber. A water circulation means for sucking the discharged water through the water storage tank and sending the water to the water injection means, and washing the object to be washed contained in the cleaning chamber with the water injected from the water injection means. in the above form a water reservoir communicating with the reservoir recessed flat part of the bottom wall surface of the cleaning chamber, into the water reservoir, with disposing the heater at a position lower than the bottom wall of the washing chamber , heating of the water reservoir-like lid drilled many water passing holes covering the upper surface of the
Provided Takaba detachably, when the water reservoir is formed along the washing chamber side walls or the rear wall DOO
The shape is recessed with a predetermined slope from the bottom wall of the washing room
The heater cover is provided on the side wall or the rear wall side.
Riding on a substantially horizontal step formed on the side wall or rear wall
It has a flat plate shape, while, on the predetermined inclined side, a lower edge
Is bent downward so as to contact the inclined wall.
Dishwasher, characterized in that that. 2. A washing chamber provided with a nozzle-shaped water jetting means.
A water reservoir communicating with a bottom wall of the cleaning chamber;
Water supply means for supplying water to the cleaning chamber,
Water is sucked through the water tank and sent out to the water injection means.
Water circulating means, and water jetted from the water jetting means.
Cleans the object to be cleaned contained in the cleaning chamber
In the dishwasher , the flat part of the bottom wall of the washing chamber is flatly recessed and
A continuous water reservoir is formed, and the bottom of the washing chamber is formed in the water reservoir.
While arranging the heater at a position lower than the wall surface,
A lid-shaped heater with a large number of water holes covering the top of the reservoir
The heater cover is detachably provided, and an edge of the heater cover is provided downstream of the water reservoir.
And a bottom surface of the water reservoir having a predetermined gap.
Dishwasher to mark. 3. The gap is so large that a finger can be inserted.
The dishwasher according to claim 2, wherein the dishwasher is used. 4. A cleaning chamber provided with water injection means, and said cleaning chamber
A water tank communicating with the bottom wall of the chamber and water is supplied to the washing chamber.
Water supply means, and water flowing from the washing chamber into the water storage tank.
Water circulating means for sucking water and sending it to the water injection means.
The water in the washing chamber by water injected from the water injection means.
A dishwasher that cleans objects to be washed
There are, in the water reservoir has a lower bottom than the bottom wall of the washing chamber
A continuous water reservoir is formed, and the water reservoir has a bottom wall of the cleaning chamber.
Place the heater lower than the surface and
A heater that catches and collects large solids dropped from elephants
A cover is mounted on the upper surface of the water reservoir, and an edge of the heater cover is provided downstream of the water reservoir.
And a bottom surface of the water reservoir having a predetermined gap.
Dishwasher to mark. 5. A cleaning chamber provided with water injection means, and said cleaning chamber.
A water tank communicating with the bottom wall of the chamber and water is supplied to the washing chamber.
Water supply means, and water flowing from the washing chamber into the water storage tank.
Water circulating means for sucking water and sending it to the water injection means.
The water in the washing chamber by water injected from the water injection means.
A dishwasher that cleans objects to be washed
There are, in the water reservoir has a lower bottom than the bottom wall of the washing chamber
When a continuous water reservoir is formed and a heater is disposed in the water reservoir,
In both cases, catch large solids dropped from the object
A heater cover to be collected is mounted on an upper surface of the water reservoir, and an edge of the heater cover is provided downstream of the water reservoir.
And a bottom surface of the water reservoir having a predetermined gap.
Dishwasher to mark.