JP3066477B2 - Filter device for 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 filter device for filtering washing water mounted on a dishwasher.

[0002]

2. Description of the Related Art In a dishwasher, as shown in FIG. 1, washing water stored in the bottom of a washing chamber (1a) in a casing (1) is usually supplied to the washing chamber (1a). cleaning object by ejected allowed to reach the nozzle arm (N) by the bottom wall portion water supply circuit including a water pump from the outlet of the washing water provided to the (11) (14) (P 1) (C 1) ( has a structure of removing stains M) (M), the said washing water after circulation using a predetermined time, is discharged outside through the drain circuit (C ₃₎ from the outlet (14). And the water supply circuit (C ₁ ) and the drain circuit (C ₃ )
A filter device (F) for removing residues contained in the washing water is provided at the upstream end of the filter.

A conventional filter device (F) is disclosed in Japanese Patent Application Laid-Open No. 63-153036. In this apparatus, as shown in FIG. 2, a recess (12) is formed in a part of the bottom wall (11), and the outlet (14) is provided in the bottom wall thereof. Support flange on (14)
As (13), a cylindrical body (2) having a bottom with a water supply circuit (C ₁ ) and a drain port (22) to a drain circuit (C ₃ ) provided on the bottom of the support flange (13). The upper end is integrated, and the supporting flange (13) supports the peripheral portion (31) of the filter body (3). Further, the peripheral portion (31) has a configuration in which the upper and lower surfaces thereof are covered with a covering material (33) made of synthetic resin.

In order to integrate the cylindrical body (2) and the support flange (13), a method by spot welding can be considered.
At the time of this welding operation, it is necessary to handle the large box-shaped cleaning chamber (1a), and the workability is poor. Also, when the cylindrical body (2) is made of synthetic resin, it cannot be connected. Therefore, usually, as shown in FIG. 3, a packing seal (D) is provided between the cylindrical body (2) and the support flange (13).
In this state, the cylinder (2) is screwed in a suspended state from above the support flange (13) with the fastening screws (B) (B) penetrating therethrough.

However, in this case, as shown in the figure, the heads (B ₁ ) and (B ₁ ) of the tightening screws (B) and (B) are supported by a support flange.
(13), the heads (B ₁ ) and (B ₁ ) (B ₁ ) are provided between the covering material (33) of the filter body (3) and the support flange (13).
A vertical gap corresponding to the height of ₁ ) is generated. Since the upper and lower gaps are relatively large, the washing water passes through this gap,
A large amount of relatively large residue contained in the washing water
(2) Leak inside. This reduces the residue removal effect of the filter body (3). In order to prevent this, it is conceivable to eliminate or substantially eliminate the horizontal gap between the covering material (33) and the peripheral wall of the concave portion (12), but in this case, the filter body ( 3) At the time of desorption, the coating material (33)
And the above-mentioned peripheral wall are easily caught, and the operability of attachment and detachment is significantly reduced.

On the other hand, these residue leakage and the filter body
In order to solve both problems of the detachability of (3),
As shown in FIG. 4, a mounting flange (15) is further protruded from the support flange (13) to the inner peripheral side.
It is conceivable to screw the cylinder (2) to 5). With this one, the heads (B ₁ ) and (B ₁ ) do not protrude from the support flange (13),
Since the support flange (13) and the covering material (33) are in close contact with each other, the residue is prevented from leaking, and the horizontal gap is increased, so that the filter body (3) can be smoothly attached and detached. However, in this case, since the inner diameter of the cylindrical body (2) with respect to the support flange (13) is small, there is a problem that the capacity of the cylindrical body (2) is smaller than that described above.

[0007]

[Technical problem] The present invention has been made in view of the above-mentioned point, and is described as follows. "A recess (12) is formed in a part of a bottom wall (11) of a cleaning chamber (1a). Outlet (14) on bottom wall of section (12)
And an outer peripheral portion of the outlet (14) is used as a support flange (13) for continuously connecting a cylindrical body (2) serving as a connection portion with a downstream circuit from the outlet (14) in a suspended state. This recess (1
A peripheral portion (31) of the filter body (3) accommodated in 2) is supported on the upper surface of the support flange (13), and the peripheral portion (31)
Is coated with a synthetic resin covering material (33) on both upper and lower surfaces of the dishwasher ''), while ensuring the capacity of the cylinder (2) while removing and removing the filter body (3). The task is to improve the effect.

[0008]

[Technical Means] The technical means of the present invention taken to solve the above-mentioned problem is that "the cylindrical body (2) is fixed to the support flange (13) by tightening screws (B) (B) penetrated from above. ) Is screwed on the lower half (33a) of the covering material (33).
A notch that is larger than the head of (B) and does not open on the outer edge side of the covering material (33) is provided corresponding to the portion where the tightening screws (B) and (B) are provided, and The thickness dimension of the half part (33a) is set to a value slightly smaller than the height of the heads (B ₁ ) and (B ₁ ) ”.

[0009]

The above technical means of the present invention operates as follows. In this case, a peripheral portion (31) of the filter body (3) is supported by a support flange (13). At this time, the lower half (33a) of the covering material (33) covering the peripheral edge (31) and the cylindrical body
(2) Head (B ₁ ) (B) of tightening screw (B) (B) for screwing
₁ ) are opposed to each other. However, the lower half portion in (33a) is a head (B ₁₎ (B ₁₎ a large notch than (4) (4) is provided, these arrangement distances screws fastening (B) (B), the peripheral portion (31) is supported by a support flange.
(13) When placed on top, the notch (4) (4)
(B ₁ ) All or most of (B ₁ ) is immersed. As a result, the vertical gap between the covering material (33) and the support flange (13) becomes extremely small.

[0010] Therefore, this filter device is provided with a cleaning chamber (1).
When the washing water in a) is allowed to pass, the relatively large residue contained in the washing water hardly passes through the upper and lower gaps and the cylindrical body (2)
No leakage inside. In addition, since the passage of the residue is substantially prevented at this portion, even if the gap between the covering material (33) and the peripheral wall of the concave portion (12) is increased, the residue does not leak.

[0011]

According to the present invention having the above configuration, the following specific effects are obtained. In this case, relatively large residues contained in the washing water are deposited on the filter body (3) covering material (33) and supporting flange.
The filter body (3) hardly passes through and the residue does not leak into the cylindrical body (2), so that the filter body (3) improves the residue removal effect. Moreover, even if the gap between the covering material (33) and the peripheral wall of the recessed portion (12) is increased, leakage of the residue can be prevented, so that the operability of attaching and detaching the filter body (3) is improved.

Further, the diameter of the cylindrical body (2) is adjusted by the support flange (13).
Since it can be set to the same degree as that of the above, the inner diameter of this cylindrical body (2) can be made large, and its capacity is sufficiently ensured. In this case, when the filter body (3) is
(31) the head (B ₁₎ the lower half of the dressing (33) between the (B ₁₎ and (33a)
The upper half of the covering material (33) is
(11) In the case of being accommodated in the recessed portion (12) so as not to protrude above the bottom wall portion (1) from the support flange (13).
The height up to 1) is smaller than the conventional one described above. Accordingly, workability such as drawing when forming the concave portion (12) is improved.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.
You. This embodiment is similar to the conventional tableware as shown in FIG.
A washing machine equipped with the filter device (F) of the present invention.
The dishwasher is equipped with a casing as shown in the figure.
A cleaning chamber (1a) that opens forward in the
That is closed by a door (T) that opens and closes the open part up and down
The objects to be cleaned (M) and (M) are placed above and below the cleaning chamber (1a).
Arrange the racks (R) (R) to be accommodated, and below these (R) (R)
Separate a pair of nozzle arms (N) and (N) for jetting the washing water
At the bottom wall (11) of the washing chamber (1a).
Connect a filter device (F) including an outlet (14)
Between the filter device (F) and the nozzle arm (N) (N).
Water pump (P₁) Containing water supply circuit (C ₁)
It has a configuration.

The washing chamber (1a) is formed in a box having a substantially square cross section which is open frontward, and the lower side of this open end is provided in the washing chamber (1a).
It is set higher than the bottom wall portion (11) of (a) by a predetermined dimension, so that a washing water storage chamber having a constant depth is formed at the bottom of the washing chamber (1a). An outlet (14) described later is provided in a front portion of the bottom wall (11). The nozzle arm (N) (N) in the cleaning chamber (1a) is connected to the support (G) connected to the bottom wall (11) and the tip of the support arm protruding from the rear wall of the cleaning chamber. The lower nozzle arm (N) is connected to the discharge port of the water supply pump (P ₁ ) through the bottom wall (11), and is rotatably supported by the provided support (G). The discharge port communicates with the upper nozzle arm (N) via a communication circuit (C ₁₁ ) with the lower nozzle arm (N). Further, an inlet of the water supply pump (P ₁ ) is connected to a tubular body (2) described later.

As shown in FIGS. 7 and 8, the bottom wall (11) is provided with a recess (12) having a substantially rectangular planar shape, and the bottom wall is provided with the recess (12). A rectangular outlet (14) is provided concentrically with the part (12). This outlet (14)
The outer peripheral part is a support flange (13) with a fixed width,
This support flange (13) has a bottomed and rectangular cylindrical body (2).
Is screwed down from above via a packing seal (D), and a peripheral portion (31) of the filter body (3) is supported on the support flange (13). In this embodiment, the width of the support flange (13) is set to a value slightly larger than the diameter of the heads (B ₁ ) and (B ₁ ) of the screw tightening screws (B) and (B). You have set.

In this embodiment, the cylindrical body (2) is made of polypropylene resin, and is provided at its upper end with an annular convex portion (21) projecting outward. The size of the inner and outer circumferences of the annular convex portion (21) is approximately equal to that of the support flange (13), and a tightening screw (B) () for screwing the annular convex portion (21) is used. The head (B ₁ ) (B ₁ ) of B) protrudes from the upper surface of the support flange (13). In addition, a drain port (22) is provided in the center of the bottom wall of the cylindrical body (2), and as shown in FIG.
A pipe extending below the pipe is branched in two directions and connected to the respective constituent pipes of the water supply circuit (C ₁ ) and the drain circuit (C ₃ ).

The filter body (3) is shown in FIG.
As shown in FIG. 8, a flat dish-shaped first filter (3a) expanding upward and an opening (34) provided at the center of the bottom wall thereof.
A cylindrical second filter (3b) housed and arranged in the second filter (3b), and a bottomed cylindrical third filter (3c) housed and arranged in the second filter (3b). Are provided with grip portions (30a) (30b) (30c), respectively. In this case, as shown in FIG. 7, in a state where each filter is mounted, the lower end of the second filter (3b) is
The second filter (3b) is arranged so as to be in contact with the upper surface of the bottom wall of the cylindrical body (2) so as to surround the drain port (22). An annular upright piece (23) is provided to position the lower end of the pipe around the drain port (22).

The first filter (3a) is shown in FIGS.
As shown in the figure, while being formed with a stainless steel punching plate provided with a number of small through holes (A) (A),
The peripheral portion (31) is formed in a rectangular and horizontal annular plate. 9 and FIG.
As shown in FIG. 0, a covering material (33) made of a polypropylene resin having a horizontal U-shaped cross section is coated on both upper and lower surfaces, and the lower half (33a) of the covering material (33a) is shown in FIGS. The head (B) according to the spacing of the tightening screws (B) and (B).
₁ ) Notches (4) and (4) slightly larger than (B ₁ ) are provided. That is, in this embodiment, the thickness dimension of the lower half (33a), the head (B ₁₎ of the threaded the fastening (B) (B) (B 1) of the slightly less degree value than the height At the same time, set the notches (4) and (4) to the head (B ₁ )
A straight portion that opens to the inner peripheral edge of the covering material (33) is continuous with a semicircular arc portion slightly larger in diameter than (B ₁ ).

FIG. 6 and FIG. 7 show the second filter (3b).
As shown in (1), numerous small holes (about 0.2 mm in diameter) are provided on the inner peripheral surface of a cylindrical frame (35) made of polypropylene resin and having four large openings in the body. A stainless steel screen (36) is fixed. And, at the outer periphery of the upper end of the cylindrical frame (35),
An engaging piece (37) fitted around the peripheral portion of (34) is provided around.

The third filter (3c) is made of a polypropylene resin, and has a number of vertically long holes formed on the side wall thereof, and a bottom wall formed with the through holes (A) and (A). Are provided with a number of small holes of slightly larger diameter. An engagement piece (38) that engages with the inner peripheral edge of the upper end of the cylindrical frame (35) is provided around the outer periphery of the upper end of the third filter (3c).

As shown in FIG. 5, a water supply port (6) as a downstream end of a water supply circuit (C ₂ ) is provided at an upper portion of a rear wall of the washing chamber (1a).
1) is open, and washing water from outside the machine is supplied into the washing chamber (1a) through the water supply circuit (C ₂ ). Cleaning room (1a)
A water level sensor (S) for detecting the level of the stored water in the tank is provided in such a manner that its detection pipe is inserted into the inlet of the water supply pump (P ₁ ), and the output value from this water level sensor (S) At this point, the on-off valve (62) is closed. Further, a drain pump (P ₂ ) is interposed in the drain circuit (C ₃ ), and a downstream side thereof is drawn out from a rear wall of the casing (1).

[Practice of Cleaning Operation] As described above, after a predetermined amount of washing water is stored in the washing room (1a) of the dishwasher configured as described above, the water supply pump (P ₁ ) is operated. The stored washing water is sent to the nozzle arm (N) (N) through the water supply circuit (C ₁ ), and is blown onto dishes and dishes (M) (M) housed in the racks (R) and (R). Can be attached. As a result, the residue adhering to the objects to be cleaned (M) (M) is dropped and falls along with the cleaning water to the bottom of the cleaning chamber (1a). The washing water containing the residue is discharged from the outlet (14) by the operation of the water supply pump (P ₁ ).
At the time, the residue is collected by each filter of the filter body (3), and the washing water is sent to the nozzle arms (N) and (N) again. .

At this time, most of the residues are collected by the first filter (3a), and relatively large residues are collected in the third filter (3c) located on the inner peripheral side of the first filter (3a). Is reached by the third filter (3c) due to the relationship between the width of the long hole provided in the third filter (3c) and the diameter of the hole. Also, the head (B ₁ ) of the tightening screw (B) (B) protruding from the upper surface of the support flange (13)
(B ₁ ) and the peripheral portion (31) of the first filter (3a) are opposed to each other. In this case, the notch described above is formed in the lower half (33a) of the covering material (33) of the peripheral portion (31). Since the parts (4) and (4) are provided, when the first filter (3a) is set, most of the heads (B ₁ ) and (B ₁ ) are inside the cutouts (4) and (4). You will be immersed. Thereby, the vertical gap generated between the covering material (33) and the support flange (13) is extremely small. Therefore, relatively large residues contained in the washing water do not leak into the cylinder (2). Moreover, even if the gap between the outer peripheral edge of the coating material (33) and the peripheral wall of the recess (12) is set large enough to allow the filter body (3) to be smoothly attached and detached, the above-mentioned residue leakage does not occur.

Further, in this embodiment, the first filter (3
The second filter (3b) is provided in order to also collect minute residues that pass through the through holes (A) and (A) in the above a) and the upper and lower gaps. That is, the lower end of the second filter (3b)
(22) is in contact with the bottom wall of the cylindrical body (2) in a manner surrounding the same, so that the fine residue is collected on the entire outer surface of the screen (36) of the second filter (3b), Wash water enters the second filter (3b) and flows out to the drain port (22).

When the above cleaning operation is completed, the drainage pump (P
₂ ) is activated, and the stored washing water is discharged out of the machine via the filter device (F) and the drain circuit (C ₃ ), and at this time, the residue is collected by the filter body (3) as described above. . Thereafter, the objects to be cleaned (M) and (M) are dried by dry air from an air supply device (K) provided in the casing (1). In order to remove the residue collected by the filter body (3), after opening the door (T), lift the grip (30b) of the second filter (3b), and remove the second filter (3b). ) Is removed together with the third filter (3c), and then the first filter (3a) is removed to clean these filters.

[Regarding Modification] The filter body (3) is not limited to the one in the above embodiment, and may have another configuration. . In the above embodiment, the cutouts (4) and (4) are opened to the inner peripheral edge of the covering material (33), but the cutouts (4) and (4) may not be opened. That is, it may be a round hole.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a dishwasher equipped with a conventional filter device (F).

FIG. 2 is a cross-sectional view of a conventional filter device (F).

FIG. 3 is a cross-sectional view when the cylindrical body (2) is screwed to the support flange (13).

FIG. 4 is a cross-sectional view when a mounting flange (15) is connected to a support flange (13).

FIG. 5 is a sectional view of a dishwasher equipped with a filter device (F) according to an embodiment of the present invention.

FIG. 6 is an explanatory view for assembling the filter body (3) according to the embodiment of the present invention.

FIG. 7 is a sectional view of a filter device (F) according to an embodiment of the present invention.

FIG. 8 is a top view of this.

FIG. 9 is a cross-sectional view of a main part thereof.

FIG. 10 is a bottom view of the first filter (3a).

[Explanation of symbols]

(1a) ・ ・ ・ Cleaning room (11) ・ ・ ・ Bottom wall (14) ・ ・ ・ Outlet (B) ・ ・ ・ Tightening screw (B ₁ ) ・ ・ ・ Head (2) ・ ・ ・ Cylinder Body (13) ・ ・ ・ Support flange (31) ・ ・ ・ Peripheral part (33) ・ ・ ・ Coating material (4) ・ ・ ・ Notch (12) ・ ・ ・ Recess

Claims (1)

(57) [Claims] 1. A recess in a part of a bottom wall (11) of a cleaning chamber (1a).
(12) is formed, an outlet (14) is opened in the bottom wall of the recess (12), and the outer peripheral portion of the outlet (14) is connected to the downstream side circuit as a connection portion with a circuit. The support flange (13) for connecting the body (2) in a suspended state and the recess (12)
The peripheral portion (31) of the filter body (3) accommodated in the supporting flange (13) is supported on the upper surface of the support flange (13), and the peripheral portion (31) is
In a filter device for a dishwasher covered with a synthetic resin covering material (33) on both upper and lower surfaces, a tightening screw penetrated from above the support flange (13).
(B) The cylinder (2) is screwed with (B), and the lower half (33a) of the covering material (33) is larger than the head of the tightening screw (B) (B) and A notch that does not open on the outer edge side of the covering material (33) is provided corresponding to the portion where the tightening screws (B) and (B) are provided, and the thickness dimension of the lower half (33a) is A filter device for a dishwasher, which is set to a value slightly smaller than the height of the head (B ₁ ) (B ₁ ).