JP2822148B2 - Clothes dryer filter device - 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 a clothes dryer, and more particularly to a filter device provided at the center of the exhaust side wall of a rotary drum for storing clothes, the filter rotating integrally with the rotary drum. The present invention relates to a filter device including a filter cover covered with a filter for preventing contact between the filter and clothing.

[0002]

2. Description of the Related Art A filter device of this type has already been disclosed in Japanese Utility Model Laid-Open No. 61-56991.
In this device, as shown in FIGS.
The filter has a structure in which wet air is exhausted through a disk-shaped filter (2) provided at the center of the back of the rotary drum. The rotary drum (1) has a filter cover having a number of openings on the inner peripheral side of the filter (2). (3) is provided so as to be rotatable relative to the rotary drum (1).

In this apparatus, the clothes stored in the rotating drum (1) are agitated by the rotation of the rotating drum (1), and dried by the heated air sent into the rotating drum (1) to dry the clothes. The humid air is discharged to the outside from an exhaust outlet through an exhaust path such as an exhaust pipe by an exhaust fan (not shown) provided on the back surface of the filter (2).

At the time of this discharge, dust such as thread waste and fine fiber waste generated in the rotary drum (1) is collected by the filter (2) and is not discharged to the exhaust path. Therefore, the inconvenience of the dust and the like clogging the exhaust path and being discharged to the outside of the dryer is eliminated. When the drying step is repeatedly performed, dust or the like is eventually deposited on the entire surface of the filter (2), and drying is impossible. In such a state, it is necessary to disassemble the filter device and perform cleaning to remove dust and the like accumulated on the filter (2).

In this conventional device, the filter cover (3)
Is provided with a scraper (31) bent in an arc shape so as to contact the surface of the filter (2).
(31) is attached in a state where the inner peripheral side is forward and the outer peripheral side is backward in the direction of relative rotation of the filter cover (3) with respect to the filter (2). Also,
Projections (3a) (3a) are provided on the surface of the filter cover (3). Therefore, the protrusions (3a) (3a) and the rotating drum (1)
The filter cover (3) is rotated relative to the filter (2) by contact with the clothes inside, whereby dust and the like deposited on the filter (2) are scraped to the outer peripheral side by the scraper (31). As a result, the filter (2) is less likely to be clogged, and the usable time before the filter device needs to be cleaned is lengthened.

However, the effect of preventing clogging cannot be said to be sufficient even with this conventional technique. The force by which the dust and the like gathered by the scraper (31) are pushed to the outer peripheral side by the relative rotation between the scraper (31) and the filter (2) is extremely small.
This is because they are accumulated on the front side in the rotation direction of (31) and are not easily moved to the outer peripheral side for the reason described later.

In particular, as in the prior art, when the scraper (31) is provided with a plurality of slits (31a) (31a), accumulated dust and the like (hereinafter referred to as a dust accumulation body (M)) are The dust stack (M) is formed by being caught by the slit. Further, radial bars 32 extending in the radial direction protrude toward the dust collecting body M at the ventilation hole forming portion of the filter cover 3 provided with a large number of openings. By the way, the thickness of the dust accumulation body (M) is determined by the filter cover having a large number of openings.
It grows to reach between the inner surface of the air hole forming portion of (3) and the surface of the filter (2), and reaches a wide area on the front side in the rotation direction of the scraper (31). Therefore, the radial bars (32) protrude into the dust stack (M). On the other hand, the extension direction of the radial bar (32) is
Since the direction of the tangent at the outer peripheral end of (31) is substantially perpendicular to and different from that of the dust collecting body (M), the dust collecting body (M) is caught by these radial bars (32) and (32) when the scraper (31) rotates, and The body (M) is prevented from moving to the outer peripheral side.

[0008] Under the circumstances described above, in the above-mentioned prior art, the scraper (31) provided for scraping the dust accumulation body (M) to the outer peripheral side does not sufficiently exhibit its function. The present invention has been made in view of such a point, and a filter (2) provided in a ventilation path from a rotating drum (1) to an exhaust outlet and integrally rotating with the rotating drum (1), The filter cover is provided at a fixed interval on the inner surface side of the rotary drum (1) so as to be relatively rotatable and has a large number of ventilation holes.
(3) and a scraper (31) provided on the back surface of the filter cover (3) and substantially in sliding contact with the filter (2) ". An object of the present invention is to make it possible to surely move dust and the like accumulated in a filter to the outer peripheral side, so that the frequency of cleaning the filter device can be significantly reduced.

[Invention of claim 1]

[0010]

[Technical Means] The technical means of the present invention for solving the above-mentioned problem is as follows: "A filter cover (3) having a large number of openings (30), (30) is provided with a vent hole forming portion; ) Is formed concentrically and annularly with respect to
(31) is disposed in the ventilation hole forming portion by inclining such that the inner peripheral side of the ventilation hole forming portion is forward and the outer peripheral side is rearward in one relative rotation direction of the filter cover (3) with respect to the filter (2). Curved crossbars protruding from the rear surface side of the ventilation hole forming portion and extending from the inner peripheral side to the outer peripheral side of the ventilation hole forming portion
And the curved bar (33) is inclined in the same direction as the scraper (31) in the circumferential direction of the filter cover (3) ”.

[0011]

The above technical means operates as follows. Due to the relative rotation of the filter cover (3) with respect to the filter (2), dust and the like attached to the filter (2) are accumulated on the front side of the scraper (31) in the relative rotation direction. The relative rotation is given by the relative movement between the clothes and the like accommodated in the rotating drum (1) and the rotating drum (1). Usually, the movement of clothes and the like in the rotating drum (1) is not uniform, but moves in a wavy manner. That is, a substantially stopped state, a low-speed movement state in which the drum moves in synchronization with the rotating drum (1), a high-speed movement (movement falling in the rotating drum (1)) than the rotating drum (1) and the like are repeated.

Accordingly, the filter cover (3) moves intermittently, for example, when the filter cover (3) shifts from the stopped state or the low-speed moving state to the high-speed moving state, the filter cover (3) accumulates in front of the scraper (31). Due to the relationship with the inertia force that tries to maintain the stopped state or the low-speed moving state of the dust stack (M), the dust stack (M)
An external force that moves in the inclination direction of 1) acts. At this time,
Curved bars (33) (33) protrude from the inner surface of the ventilation hole forming portion and bite into the dust accumulation body (M), and the disposing direction of the curved bar (33) depends on the scraper (31). ), It does not become a resistance when the dust stack (M) moves.
Therefore, when the amount of dust accumulation (M) accumulated in the forward direction of the scraper (31) reaches a predetermined amount, the filter cover is removed.
The dust accumulation (M) is smoothly moved to the outer peripheral side of (3), and a part of the dust accumulation (M) escapes and is stored in the peripheral portion of the filter cover (3). Thereafter, each time the amount of the dust aggregate (M) reaches a predetermined amount, the movement to the outer peripheral side is repeated.

[0013]

[Effect] The dust stack (M) accumulated in the forward direction of the relative movement of the scraper (31) with respect to the filter (2) is repeatedly and smoothly moved to the outer periphery, and the scraper (3) in the filter cover (3) is removed. The amount of dust and the like accumulated on the outer peripheral portion and the amount of dust and the like accumulated on the front portion in the moving direction of the scraper (31) are within an allowable value (the filter (2) in the portion where no dust or the like is accumulated). The filter device can be used without cleaning until the passage area reaches a value where a predetermined area is secured), so that the frequency of cleaning the filter device is reduced.

The present invention solves the same problems as those of the first aspect of the present invention, and the technical means adopted for this purpose is "multiple openings (30) (30)". The filter cover (3) formed with the vent hole is formed so as to be concentric and annular with respect to the filter cover (3). The scraper (31) has a substantially spiral shape in which the inner peripheral side of the vent hole forming part is forward and the outer peripheral side is rearward in one relative rotation direction of the filter cover (3) with respect to the filter (2). And the ventilation hole forming portion is composed of the scraper (31) and a reinforcing bar protrudingly formed at an edge of the scraper (31) facing the inside of the rotary drum (1). "

In this case, the filter (2) of the scraper (31)
Dust accumulation body which is accumulated forward in the relative movement direction with respect to
Since (M) only contacts the scraper (31) and hardly contacts the reinforcing bar, when the amount of the dust accumulation (M) reaches the predetermined amount, This reinforcing bar does not cause movement resistance, and a part of the dust accumulation body (M) is more smoothly moved to the outer peripheral side, so that the same effect as that of the first aspect or more can be obtained.

[0016]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. Embodiment 1 shown in FIGS. 4 to 6 corresponds to the embodiment of the first aspect of the present invention. In this embodiment, the ventilation hole forming portion of the filter cover (3) has a large number of spiral curved cross sections. (33) (33) and one annular crosspiece (34) are formed.

Hereinafter, the relationship between the rotating drum (1) and the filter (2) will be described in detail. Also in this embodiment, similarly to the conventional one, the back filter (2) is provided inside the rotary drum (1) at the exhaust port (11) provided at the center of the rear wall (10) of the rotary drum (1).
1) is fixed. The back filter (21) includes a shaft insertion portion (22) that fits around the rotation shaft of the rotating drum (1), and an outer frame (removably attached to the outer periphery of the exhaust port (11)). Two
3) and a radial bar stretched between them (not shown)
And a filter sheet (24) stretched between the shaft insertion portion (22) and the outer peripheral frame (23). Then, in order to make the back filter (21) detachable, a plurality of key-shaped locking pieces (25) (25) protruding from the back surface of the outer peripheral frame (23) exhaust air from the rotating drum (1). Locking holes provided in the outer peripheral area of the mouth (11)
(12), and the rotary shaft cover (J) is screwed in and fixed. Since the entire back filter (21) is made of an elastic synthetic resin, after removing the rotary shaft cover (J), the back filter (21) is peeled off from the back wall (10). (25) is pulled out from the locking hole (12) so that the back filter (21) can be removed.

The filter (2) is detachably engaged with an annular portion (22a) provided in the shaft insertion portion (22), and is loosely fitted to the shaft of the rotary drum (1). 26), an annular wall (27) on the outer peripheral side, a flange portion (F ₁ ) extending from the middle of the cylindrical shaft portion (26), and an inner wall of the annular wall (27). A flange (F ₂ ), a plurality of radial bars (not shown) connecting these flanges to each other, and a filter sheet (28) provided inside the rotary drum (1); The filter (26) engages with the annular part (22a).
(2) and the rotary drum (1) are configured to rotate integrally.

The filter cover (3) is formed in a dish shape as a whole, and is provided with a protruding portion (3a) protruding into the rotary drum (1) at a part near the periphery thereof. )
An annular inner wall (35) that fits loosely onto the annular wall (27),
An annular outer wall (36) that fits loosely into an annular rib (23a) formed on the peripheral edge of an outer peripheral frame (23) of the back filter (21), and a rotating drum (1) Rotating shaft lid (J)
Is provided with an engaging cylinder portion (4) which is loosely fitted in a retaining state. The engaging cylinder portion (4) is provided with slits (41) and (41) which are partially opened in the axial direction as shown in the rear view of FIG. 6, and is configured to be elastically deformable in the radial direction. The projection (42) partially projecting from the inner peripheral surface of the tip of the cylindrical portion (4) is
It is loosely fitted in the annular groove (J ₁ ) formed in (J). Therefore,
This filter cover (3) consists of a rotating shaft lid (J) and a filter (2).
The filter (2) that rotates integrally with the rotating drum (1) because both the fitting portion with the back filter (21) is in a loosely fitted state.
Can rotate relative to.

In the flat part of the filter cover (3), there are provided ventilation holes formed through a large number of openings (30), (30).
The vent hole forming portion is provided between a central disk portion (37) having the engagement cylinder portion (4) and an outer peripheral portion (38) having the inner wall (35) and the outer wall (36). Many spiral curving bars installed in
(33) Composed of (33) and an annular bar (34) connecting slightly outside of the middle of these, a scraper is attached to the back of one curved bar (33).
(31) is formed to protrude. The rear edge of the scraper (31) has a configuration in which small mountain shapes are continuous, and the mountain-shaped continuous portion (31a) comes into contact with the filter sheet (28) of the filter (2).

The inner and outer ends of the curved bar (33) are circumferentially displaced from each other, so that both ends and the filter cover (3)
The angle between the line connecting the center of the filter and the filter cover (3) is about 30 degrees. In this embodiment, the relative rotation direction of the filter cover (3) is determined by the rotation direction of the rotating drum (1). Determined by the relationship with the direction. That is, when the garments fall, a relative rotational force is applied by contact between the garments and the protruding portion (3a), and the filter cover (3) is configured to rotate clockwise in FIG. In this relative rotation direction, the inner peripheral side of the curved bar (33) is forward of the outer peripheral side.

Each of the curved bars (33) is provided with a filter cover.
(3) is a bar of constant width protruding to the back surface side, and the annular bar (34) is formed at the inner end of the rotating drum (1) of these curved bars (33), (33). In the case of this embodiment, dust and the like adhere to the surface of the filter sheet (28) of the filter (2) during the drying operation. Since the filter cover (3) is relatively rotated clockwise in FIG. 5, dust and the like adhering to the surface of the filter sheet (28) are collected by the scraper (31). The dust and the like collected in this manner are collected at the front portion of the scraper (31) in the relative rotation direction to form a dust stack (M) as shown in FIG. As described above, when this reaches a certain amount (for example, a degree of a deformation sector having an angle θ of 30 to 40 degrees), the rotational force of the intermittently rotating scraper (31) and the inertial force of the dust stack (M) are compared. When the speed of the scraper (31) is increased, a part of the dust stack (M) is moved to the outer peripheral side by the correlation action.

In this embodiment, the filter cover (3) is located at a position outside the outer ends of the scraper (31) and the curved bar (33).
An annular lint receiving portion between the peripheral portion and the flange portion and (F ₂₎ of
Since (39) is formed, the dust accumulation body moved to the outer peripheral side
Part of (M) is stored or escaped to the lint housing (39) side as shown in (b) of FIG. When the amount of the dust accumulation (M) is increased to a predetermined amount, each time the intermittent rotation of the filter cover (3) is increased, the above operation is performed, and a part of the dust accumulation (M) is moved to the outer peripheral side. And is sequentially stored or escaped in the lint storage section (39). Usually, it is necessary to clean the filter device in a state where about 60% of the filter sheet (28) of the filter (2) is covered with dust or the like, but in this embodiment, the lint housing (39) The inside is filled with dust and the like, and continuous use is possible until the amount of dust accumulation (M) on the front side of the scraper (31) reaches the above-mentioned amount with respect to the filter sheet (28).

In this embodiment, the projecting width of the curved beam (33) to the rear side is set to be constant along the longitudinal direction, and
The distance from the back surface of (34) to the surface of the filter sheet (28) is set to about 1/3, but as shown in FIG. You may make it small. In this case, the dust accumulation body (M) easily moves to the outer peripheral side. This is because when the dust accumulation body (M) attempts to move to the outer peripheral side, the resistance on the outer peripheral side of the filter cover (3) is reduced at the protruding portion of the curved bar (33) toward the rear side.

[Embodiment 2] This embodiment is similar to the above-described claim 2.
In the first embodiment, the filter cover
Only the configuration of the scraper (31) and the ventilation hole forming section in (3) is different, and the other configuration is exactly the same as that of the first embodiment. As shown in FIG. 9 and FIG.
Two scrapers (31) (31) and a plurality of radial bars (32) as reinforcing bars connected to the inner edge of the rotating drum of the (31).
The scraper (31) is formed in a spiral shape over a range of one round in the circumferential direction of the ventilation hole forming portion.

In this device, the sections surrounded by the scrapers (31) and (31) and the radial bars (32) and (32) have openings (30) and (3).
0). In the case of this embodiment, the filter cover (3) is relatively rotated by contact with clothing in the same manner as in the above embodiment (1), and dust or the like is placed between the back surface of the ventilation hole forming portion and the filter sheet (28). Are collected at the front of the scraper (31). Then, the dust accumulation body (M) is moved to the outer peripheral side by the same operation as in the first embodiment, but the
(32) Since (32) does not protrude to the back side of the ventilation hole forming part,
These radial crossbars (32), (32) do not resist movement of the dust stack (M). Therefore, the dust accumulation body (M) accumulated forward in the rotation direction of the scrapers (31) and (31) is moved to the outer peripheral side more smoothly than in the first embodiment.

This means that the area in which the scrapers (31) and (31) are arranged in the circumferential direction of the ventilation hole forming portion is set to a range shorter than that of the embodiment shown in FIGS. 12, as shown in FIG. 12, four scrapers (31) and (31) disposed over a range of 90 degrees, and a plurality of annular bars (34) (34) ( Multiple openings (30) by 34)
The same applies when (30) is configured. The circular bar (3
4) (34) functions as a reinforcing bar.

[Others] In this embodiment, the relative rotation direction of the filter cover (3) with respect to the rotating drum (1) is clockwise in FIG. 5 in relation to the rotating direction of the rotating drum (1). However, in order to ensure relative rotation to one side, a chevron (5) as shown in FIG.
It may be formed on the outer peripheral portion of the surface of (3). This chevron (5)
Of the filter cover (3) in the direction of relative rotation
In 1), the other surface is a vertical surface (52). Therefore, in this case, the clothes in the rotating drum (1) and the filter cover
When (3) moves relative to each other, and when the garment moves clockwise in FIG. 5, the filter cover (3) is easily driven to rotate, and when the garment moves in the reverse direction, little rotational force is applied. . Therefore, the filter cover
The relative rotation of (3) to one of the rotating drum (1) and the filter (2) is further ensured.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a conventional example.

FIG. 2 is a front view thereof.

FIG. 3 is an enlarged sectional view of a main part.

FIG. 4 is a sectional view of a main part of an embodiment of the present invention.

FIG. 5 is a front view thereof.

FIG. 6 is a rear view of the filter cover (3).

FIG. 7 is an explanatory view showing a process of moving the dust accumulation body (M).

FIG. 8 is an explanatory view of a modified example of the filter cover (3) of the first embodiment.

FIG. 9 is a front view of the filter cover (3) according to the second embodiment.

FIG. 10 is a cross-sectional view of a main part thereof.

FIG. 11 is a front view of a modified example of the filter cover (3) of the second embodiment.

FIG. 12 is a sectional view of a main part thereof.

FIG. 13 is an explanatory view of another example of the protrusion (3a).

[Explanation of symbols]

 (1) ・ ・ ・ Rotating drum (2) ・ ・ ・ Filter (3) ・ ・ ・ Filter cover (31) ・ ・ ・ Scraper (33) ・ ・ ・ Curved bar

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) D06F 58/02 D06F 58/22

Claims (4)

(57) [Claims] 1. A filter provided in a ventilation path from a rotary drum (1) to an exhaust outlet and integrally rotating with the rotary drum (1).
(2), a filter cover (3) provided on the inner surface side of the rotating drum (1) at a fixed interval so as to be rotatable relative to each other, and having a large number of ventilation holes, and the filter cover (3).
And a scraper (31) provided on the back of the filter and substantially in sliding contact with the filter (2).
The ventilation hole forming portion of the filter cover (3) having a large number of openings (30) is formed concentrically and annularly with respect to the filter cover (3), and the scraper (31) is provided with a filter. The filter cover (3) is disposed so that the inner peripheral side of the filter cover (3) is inclined forward so that the inner peripheral side is forward and the outer peripheral side is rearward in one relative rotation direction of the filter cover (3). Curved bars (33) and (33) projecting from the inner surface of the ventilation hole forming portion to the outer surface of the air vent forming portion are provided on the back side of the filter, and the curved bar (33) is attached to the scraper in the circumferential direction of the filter cover (3). A filter device for a clothes dryer having a shape inclined in the same direction as (31). 2. The filter device for a clothes dryer according to claim 1, wherein the scraper (31) and the curved bars (33) and (33) are formed in a spiral shape which is the same and extends in the same direction with respect to the circumferential direction. . 3. A filter provided in a ventilation path from a rotating drum (1) to an exhaust outlet and integrally rotating with the rotating drum (1).
(2), a filter cover (3) provided on the inner surface side of the rotating drum (1) at a fixed interval so as to be rotatable relative to each other, and having a large number of ventilation holes, and the filter cover (3).
And a scraper (31) provided on the back of the filter and substantially in sliding contact with the filter (2).
The filter cover (3) having a large number of openings (30) (30) has a vent hole forming portion formed concentrically and annularly with respect to the filter cover (3), and the scraper (31) has a through hole. The scraper (31) is formed on the back surface of the pore forming portion, and the scraper (31) is a filter cover for the filter (2).
(3) In one of the relative rotation directions, the inner peripheral side of the vent hole forming portion is forward and the outer peripheral side is rearward in a substantially spiral shape,
The filter device for a clothes dryer, wherein the ventilation hole forming part includes the scraper (31) and a reinforcing bar formed to project from an edge facing the inside of the rotary drum (1). 4. The filter cover (3) has a protrusion (3a) on the inner surface of the rotating drum, the protrusion being in contact with clothing.
The filter device for a clothes dryer according to any one of claims 1 to 3.