JP2863889B2 - Dishwasher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher of the type in which a predetermined amount of cleaning water is stored in a cleaning chamber and the stored cleaning water is sprayed onto an object to be cleaned.

[0002]

2. Description of the Related Art As a dishwasher of the above-mentioned type, as shown in FIG. 7, a washing chamber (2) having a front opening is formed in a casing (1). In this case, a storage unit (23) having a certain depth for storing the washing water is formed at the bottom of the washing chamber (2), and a filtering device (70) for filtering the washing water is provided. A filter device housing chamber (7) to be housed is protruded downward from the bottom of the storage part (23), and a side body of the filter device housing chamber (7) and a nozzle arm (6) for jetting washing water. The inlet end of the washing pump (6
This is a configuration in which communication is established via 2). A water supply circuit for supplying cleaning water to the inside of the cleaning chamber (2) is connected to the side wall of the cleaning chamber (2). Also, the filtering device housing chamber
A drain port (7a) is opened on the bottom wall of (7).
A drain circuit for discharging the stored washing water to the outside is connected to (7a). Further, tableware (M) is provided in the washing room (2).
A rack (4) for mounting the rack is housed in a freely removable manner.

As shown in FIGS. 8 and 9, the filtering device (70) has a double structure having two inner and outer filters (72) and (71). One outer filter (71) is constituted by integrally connecting a first filter (710) formed in a rectangular dish shape and a cylindrical second filter (711) protruding from the bottom wall thereof. ing. Other inner filter (72)
Is formed in a cylindrical shape with a bottom, and the second filter (71
1) housed inside.

The rack (4) is formed in a rectangular basket shape, and has support rollers (40) (40) protruding from the lower end side thereof.
Are supported by a support rail (5) attached to the side wall of the cleaning chamber (2). In this machine, a rack (4) containing tableware (M) is housed in the washing room (2), and when the washing machine is operated with the door (3) closed, the water supply circuit causes the storage unit ( twenty three)
Wash water is stored in the inside. Then, this stored washing water is
The tableware (M) is suctioned by the washing pump (62) and is passed through a number of nozzles provided on the nozzle arm (6) through the filtration device (70).
It is gushing. The jetted washing water is used to wash the tableware (M), wash away the residue attached thereto, and return to the storage section (23) together with the residue. Thereafter, the relatively large residue is collected at the center of the filtration device (70) and collected by the inner filter (72), and thereafter, this washing step is repeated. That is, in this washing machine, the inner and outer two filters (72)
By passing the washing water through the filtration device (70) consisting of the (71), the residue is removed and the washing water is circulated.

[0005] When the washing step is completed, the dirty washing water in the storage section (23) is discharged to the outside from the drain circuit through the filtration device (70), thereby collecting the same residue as above. Will be In this case, since the stored cleaning water is circulated during the cleaning, the amount of the cleaning water used is small, and the residue is not discharged to the outside together with the cleaning water at the time of drainage.

[0006] However, in this washing machine, a filtration device is used.
There has been a problem that the operation of removing the (70) from its mounting part in order to clean the (70) becomes complicated. Generally, racks (4)
The rack is made as large as possible to increase the holding capacity of the tableware (M), and is located between the lower front edge of the rack (4) and the corresponding peripheral edge of the opening of the washing room (2). Does not have much spacing. Therefore, when the rack (4) is housed in the washing room (2), the rack (4) becomes an obstacle and the filtering device (70) cannot be removed.
In order to clean the rack, another operation to move the rack (4) out of the cleaning room is required. This complicates the cleaning of the filtering device (70).

According to the present invention, a storage section (23) provided at the bottom of the washing chamber (2) which is open frontward, and a filter device storage chamber () provided continuously below the storage section (23) are provided. 7), a relatively flat first filter (710) provided with an opening (710c) on the bottom wall, and the opening (710).
c) has an outside diameter that can be inserted into the opening, and the opening (710)
a filtering device (70) including a cylindrical second filter (711) having an engagement piece (711d) engaged from above with the peripheral portion of (c), and a washing chamber above the storage portion (23). (2) and a rack (4) housed therein.
After the washing water stored in the storage section (23) is passed through the filtering device (70) in the filtering device accommodating chamber (7) and ejected to the object to be cleaned in the rack (4), the storage portion ( Dishwasher of the type to be returned to 23)
It is an object of the present invention to facilitate the cleaning operation of 0).

[0008]

[0009]

The technical means of the present invention taken to solve the above-mentioned problem is as follows. "The rack (4) has a shape in which the lower part on the front side is cut off, and the rack (4) is cut out. The distance between the portion and the peripheral edge of the opening of the cleaning chamber (2) is made larger than the length in the depth direction of the filtering device (70), and the filtering device (70) is accommodated in the cleaning chamber (2) with the rack (4) housed therein. Is set so that it can be attached to and detached from the filtering device accommodating chamber (7). "

[0010]

The above technical means of the present invention operates as follows. The filter device (7) is provided between the cutout at the lower part on the front side of the rack (4) and the corresponding wall surface of the washing room (2).
0) is formed so as to be able to be taken in and out while maintaining the mounting posture. From this, in a state where the rack (4) is accommodated in the cleaning chamber (2), it is possible to pass the filtration device (70) at the above-mentioned interval in almost the mounting posture and take out from the front opening of the cleaning chamber (2). it can.

[0011]

According to the present invention having the above-described configuration, the present invention has the following specific effects. Since the filter (70) can be attached and detached in a state where the rack (4) is housed in the washing room (2) and the mounting posture thereof is substantially maintained, it is extremely easy to remove the filter (70). Become. In cleaning, the operation of moving the rack (4) out of the cleaning chamber is not required, and the cleaning operation of the filtering device (70) is facilitated.

[0012]

[0013]

[0014]

[0015]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. The embodiment shown in FIGS.
A cleaning chamber (2) that opens forward is formed in (1), and this front opening is closed by a door (3) that opens and closes vertically. These are racked up and down in the washing room (2).
(4) and (4) are accommodated, and nozzle arms (6) and (6) for jetting the washing water are separately arranged below these racks (4) and (4). In addition, an air supply device (8) for supplying drying air to the space behind the cleaning chamber (2) is provided, and the cleaning chamber (2)
A washing pump (6) for sucking washing water is provided in a space below the bottom of the washing machine through a filtering device housing chamber (7) housing a filtering device (70).
2) Drain pump for draining dirty washing water after washing and
(75) and so on.

Hereinafter, each of the components will be described in detail. Washing room
(2), as shown in FIG. 1, is constituted by a box having a substantially square cross section open frontward. The lower side of the open end is set higher than the bottom wall (21) of the cleaning chamber (2) by a predetermined height, so that the bottom of the cleaning chamber (2) has a certain depth of washing water storage. Storage section (23) is formed. At the upper center and lower center of the cleaning chamber (2), there are arranged nozzle arms (6) and (6) having a large number of nozzles for jetting cleaning water. The support (P) protruding from the bottom wall (21) of the chamber (2) is rotatably supported, and the upper nozzle arm (6) protrudes from the rear wall (27) of the cleaning chamber (2). Each of the nozzles is rotatably supported by a support (P) provided on the support arm (61), and each of the nozzles is set in a posture in which the nozzle mounting portion faces upward.

The length of each of the nozzle arms (6) and (6) is set to be slightly smaller than the width and depth of the cleaning chamber (2), and the whole of the nozzle arm (6) including the rotating shaft is formed in a hollow shape. . And a cleaning pump protruding through the bottom wall (21)
The discharge port of (62) is connected to the lower nozzle arm (6), and the upper nozzle arm (6) and the discharge port of the washing pump (62) are connected via a communication circuit (60) connected to this connection portion. Are connected. As a result, the cleaning water supplied to the nozzle arms (6) and (6) from the cleaning pump (62) in the above-described path is ejected from a number of nozzles arranged on the upper surface thereof, and each nozzle arm
(6) (6) is driven to turn by the reaction force of the injection output.

Racks for accommodating tableware (M) (4) (4)
Are disposed above and above the nozzle arms (6) and (6) so as to be freely taken in and out, and are each formed of a metal wire coated with a resin. The upper rack (4) is formed in the shape of a rectangular basket and has rails attached to both side walls of the cleaning chamber (2).
(5) It is supported so that it can be pulled out freely.

For this reason, support rollers (40) (40) project outward from the lower end side wall of the rack (4) and are movably mounted on the rail (5). Lower rack
As shown in FIG. 1, (4) has a rectangular basket-like overall shape like the upper rack (4), but has a notch (R). That is, a mode in which the rack (4) is notched obliquely from the front surface to the lower surface (in this embodiment, the size of the notch is set to 6 cm in the height direction and 7.5 cm in the depth direction). It is.) Support rollers (40) (40) project outward from the lower end side wall of the rack (4), and these support rollers (40) (4)
0) is supported by a support rail (5) attached to the side wall of the cleaning chamber (2) near the upper part of the nozzle arm (6), whereby the rack (4) is connected to the lower nozzle arm (6). It is arranged so that it can be pulled out near the upper part. The degree of cutout of the cutout (R) is set to such an extent that the filter (70) can be detached while the rack (4) is housed in the washing room (2). That is, the distance (X) between the rack (4) and the peripheral edge of the opening of the cleaning chamber (2) is the vertical height of the filtration device (70) described later.
(Y) and the front-rear width (Z) are set to be larger (see FIGS. 3 and 4). In this embodiment, the interval (X) is 12 cm, the height (Y) and the front-rear width (Z) are 10 cm.
Is set to Also, the part where the opened door (3) is closest to the rack (4) (the lower corner of the door (3)) and the rack (4)
The distance from (4) is set to 11 cm.

The filtering device accommodating chamber (7) is formed by deeply recessing the bottom wall (21) of the washing chamber (2) downward, and the filtering device (70) is disposed at the upper peripheral edge thereof. . The side body of the filtering device housing chamber (7) is connected to the suction port of the washing pump (62). Therefore, the nozzle arm (6) (6)
The washing water discharged from is filtered by the filtration device (70). Further, a drain port (7a) is formed at the bottom of the filtering device housing chamber (7), and is connected to the suction port of the drain pump (75). The drain pipe (74) connected to the discharge port of the drain pump (75) is connected to the rear plate (1b) of the casing (1).
From the outside. Therefore, by operating the drain pump (75) after the completion of the cleaning, the stored cleaning water in the storage section (23) is filtered by the filtration device (70) and discharged to the outside.

As shown in FIGS. 2 to 4, the filtering device (70) comprises an outer filter comprising a first filter (710) and a second filter (711) disposed at the bottom wall opening (710c). (71), and an inner filter (72) disposed at the upper peripheral portion of the second filter (711) and housed inside the second filter (711). ) (711) (72) have handles (710a) (711a)
(72a). This is a filter device storage room
At the periphery of the top opening of (7), the frame of the first filter (710)
(710d) are engaged with each other, and when the filters (710), (711), and (72) are housed in the filtering device housing chamber (7), the lower end of the second filter (711) is closed. However, it comes into contact with the upper surface of the bottom wall of the filtering device accommodating chamber (7) so as to surround the drain port (7a). In addition, filtration device accommodation room
(7) On the bottom wall, around the drain (7a), a second filter (7
An annular upright piece (7b) for positioning the lower end of 11) is projected.

The first filter (710) is formed of a flat dish-shaped body that expands upward. And the first
The filter (710) has a through hole (710b) (7
10b) is formed of a perforated stainless steel punching plate, and an opening (710c) for inserting the second filter (711) is provided at the center of the bottom wall thereof. A frame (710d) made of polypropylene resin is mounted on the outer peripheral edge of the upper end.

The second filter (711) has a diameter of 0.2 mm inside a cylindrical frame (711b) made of polypropylene resin.
A stainless steel screen (711c) in which a number of small holes are formed innumerably is mounted, and an opening (710c) of the first filter (710) is provided on the outer periphery of the upper end of the frame (711b). An engaging piece (711d) that engages with the peripheral edge of is provided. A step (711e) is provided on the outer surface of the frame (711b) and the outer surface of the screen (711c) (see FIG. 5).

The inner filter (72) is formed of a bottomed cylinder made of polypropylene resin, and has a large number of long holes running vertically in the side wall thereof, and a diameter of 2 mm in the bottom wall. Many small holes of about 5 mm are drilled. An engagement piece (72b) that engages with an upper edge of the frame (711b) of the second filter (711) is provided around the outer periphery of the upper end of the inner filter (72).

In this embodiment, the cleaning water is stored in the storage section (23), and the stored cleaning water is supplied to the upper and lower nozzle arms (6), (6).
And the washing operation is performed. Therefore, as shown in FIG. 1, a water supply port (2a) at the downstream end of the water supply pipe (25) is opened above the rear wall (27) of the cleaning chamber (2), and the water supply pipe (25) is opened.
The washing water supplied through the water supply port (2a)
(23).

For this water supply control, as shown in FIG.
A water level sensor (78) for detecting the water level in the storage section (23) is provided in communication with the filtration device housing chamber (7), and the output of the water level sensor (78) is applied to the water supply control device (C ₁ ), and the output Is input to the on-off valve (22) inserted into the water supply pipe (25). Therefore, the opening / closing valve (22) is opened by the start operation, and water is supplied from the water supply port (2a) to the storage section (23), and when the water level in the storage section (23) reaches a set value, the water supply is stopped. The on-off valve (22) is closed by the output of the control device (C ₁ ), and a predetermined amount of washing water is automatically supplied.

At the time of washing dishes, the storage section (2) of the washing room (2) is used.
3) The cleaning water stored in the racks above and below the upper and lower nozzle arms (6) and (6) by the cleaning pump (62).
(4) After being ejected toward (4), the water returns to the storage section (23). At this time, the temperature of the washing water is controlled to increase the washing efficiency. Therefore, in order to maintain the temperature of the washing water at a predetermined temperature, a heater (20) is added to the surface of the bottom wall (21) of the washing chamber (2), and the back surface of the bottom wall (21) is provided. Is provided with a temperature detection sensor (S). Then, the temperature detected by the temperature detection sensor (S) is input to the temperature control device (C ₂ ), and the heater (20) is controlled by the output from the temperature control device (C ₂ ), whereby the temperature in the storage unit (23) is reduced. The temperature is controlled to be suitable for the degree of progress of the cleaning operation.

After the completion of the cleaning step, a drying step is performed. For this drying, the wall of the cleaning chamber (2) and the casing are removed.
Between the wall of (1), an air supply device (8) is provided, and an exhaust device is built in. The air supply device (8) has an inverted L extending from an air supply port (10) provided at the upper end of the front surface of the casing (1) to an opening (81) below the rear wall (27) constituting the washing chamber (2). The air supply passage (83) has a built-in air supply fan (80) inside, and the temperature of the air supplied by the air supply device (8) is set to a predetermined temperature by the heater (20). You.

The other exhaust device includes a discharge port (36) provided at the upper end of the front surface of the casing (1) and an inflow port (35) formed at the center of the ceiling wall (26) constituting the washing chamber (2). And exhaust passage (34)
Are connected in communication. In the dish dryer of the above embodiment, the operation of each part is performed at a predetermined timing by the control device (C), and the rack (4)
(4) The tableware is stored in this rack (4) (4) and the washing room (2)
When the start switch is operated in this state, the water supply switch is turned on, and a predetermined amount of washing water is supplied from the water supply pipe (25) by the water supply control device (C ₁ ) included in the control device (C). Is stored in the storage section (23), and the water supply operation is automatically stopped. Thereafter, a cleaning operation signal is output from the control device (C), and the stored cleaning water is sucked by the cleaning pump (62), passes through the filtration device (70), and is pressure-fed to the nozzle arms (6), (6). The cleaning operation is performed by the cleaning water ejected from the nozzle. At this time, the residue washed from the dishes is
Although collected by the second filter (710) (711) or the inner filter (72), a relatively large residue is transferred to the inner filter (72) due to the diameter of the hole provided in the inner filter (72). Collected. At the time of this washing, the temperature of the washing water in the storage section (23) is maintained at a predetermined temperature by the temperature control device (C ₂ ) included in the control device (C).

When the cleaning operation is completed, the control device (C)
The drainage pump (75) is operated by the output of, and the water stored in the storage part (23) is discharged from the drainage pipe (74) through the filtration device (70), and the residue is collected by the filtration device (70). Is performed.
At this time, the lower end of the second filter (711)
(7a) is in contact with the bottom wall of the filtration device accommodating chamber (7) so as to surround the second filter (7).
11) enters the inside of the screen (711c) from the entire outer surface thereof and flows out to the drain port (7a). Thus, the residue that has passed through the through-holes (710b) and (710b) of the first filter (710) is
Although it is finally collected by the second filter (711), due to the diameter of the small hole provided in the screen (711c), a relatively small residue is collected therein, and the residue is collected. ,
It adheres to the entire outer surface of the screen (711c).

Thereafter, a finishing step and a drying step are performed, and air is supplied into the cleaning chamber (2) by the air supply device (8), and is discharged from the exhaust device to the outside. This drying step is continued for a predetermined time and ends. After the above steps are completed, when removing the residue collected in the filtration device (70),
Open the door (3), lift the handle (711a) of the second filter (711), and place the second filter (711) in the inner filter.
Then, the first filter (710) may be removed and the filters (710), (711), and (72) may be cleaned. At this time, the lower rack (4) has a notch (R), and the notch (R) is provided between the rack (4) and the cleaning chamber.
Since the space (X) between the opening (2) and the periphery of the opening is larger than the vertical height (Y) and the front-rear width (Z) of the filtration device (70), the rack (4) is The second filter (711) and the first filter (710) provided with the inner filter (72) can be easily removed while being housed in the cleaning chamber (2).
At this time, as described above, the residue collected by the second filter (711) is adhered to the entire outer surface of the screen (711c), but is located between the frame (711b) and the screen (711c). Step
Since (711e) is provided, the residue
When the second filter (711) is removed from the first filter (710), the residue is removed from the first filter (710).
There is no inconvenience that the edge of the opening (710c) of (710) is scraped off. In this filter, the filters (710) (71)
1) The notch (R) is formed large so that the (72) can be removed integrally, and the handle (7) of the first filter (710) is formed.
It is also possible to lift 10a) and simultaneously remove and clean the entire filter (710) (711) (72).

In the above embodiment, the inner filter (72)
Is configured to be detachably provided on the second filter (711), but may be configured integrally with the second filter (711).

[Brief description of the drawings]

FIG. 1 is an explanatory view of an embodiment of the present invention.

FIG. 2 is an exploded side view of the filtration device.

FIG. 3 is a plan view of this.

FIG. 4 is a cross-sectional view of a state where a filtration device is accommodated in a filtration device accommodation chamber (7).

FIG. 5 is a detailed view of a second filter (711).

FIG. 6 is an explanatory diagram of a control device (C).

FIG. 7 is an explanatory view of a conventional example.

FIG. 8 is a cross-sectional view of the filtration device.

FIG. 9 is a plan view of this.

[Explanation of symbols]

 (2) ・ ・ ・ Washing room (23) ・ ・ ・ Reservoir (4) ・ ・ ・ Rack (7) ・ ・ ・ Filter device storage room (70) ・ ・ ・ Filter device (710) ・ ・ ・ First filter (710c) ・ ・ ・ Open part (711) ・ ・ ・ Second filter (711d) ・ ・ ・ Engagement piece (72) ・ ・ ・ Inner filter

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁶ , DB name) A47L 15/42 A47L 15/50

Claims (1)

(57) [Claims] 1. A storage section (23) provided at the bottom of a washing chamber (2) which is open frontward, and a filter device storage chamber (7) provided continuously below the storage section (23). Opening on bottom wall (7
10c) provided with a relatively flat first filter (7
10) and a cylindrical second filter having an outer diameter capable of being inserted into the opening (710c), and having an engagement piece (711d) engaged with a peripheral portion of the opening (710c) from above. (711), and a rack (4) housed in the washing room (2) above the storage part (23), and stored in the storage part (23). The washed washing water is supplied to the filtration device (7) in the filtration device accommodation room (7).
In the dishwasher of the type in which the object to be washed in the rack (4) is ejected after passing through the container (0) and then returned to the storage part (23), the rack (4) is cut off at the lower front side. The clearance between the cut-out portion of the rack (4) and the peripheral edge of the opening of the cleaning chamber (2) is made larger than the length in the depth direction of the filtering device (70), and the rack is placed in the cleaning chamber (2). A dishwasher set so that the filtering device (70) can be attached to and detached from the filtering device housing chamber (7) while the (4) is stored.