JP3062867B2 - 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 rotating 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 being clogged in 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,
Drive projections (39) (39) are provided on the surface of the filter cover (3). Therefore, the driving projections (39) (39) and the rotating drum
The filter cover (3) is rotated relative to the filter (2) by contact with the clothes in (1), whereby dust or the like accumulated on the filter (2) is scraped by the scraper (31). As a result, clogging of the filter (2) is less likely to occur, and the usable time until the filter device needs to be cleaned becomes longer.

However, when the amount of dust and the like (hereinafter referred to as a dust aggregate (M)) gathered and gathered by the scraper (31) increases, the dust and the like become large on the front side in the rotation direction of the scraper (31). The dust accumulates over the area, and in some cases these dusts pass through the vent (3b), which forms a number of openings (30) (30) in the filter cover (3).
(1) Backflow to the side or protrude
(1) Clothes and the like inside will be stained.

SUMMARY OF THE INVENTION The present invention has been made in view of the above point, and has been made in view of the following problem.
And a cover for covering the filter (2) from the inside of the rotary drum (1) and having a ventilation portion having a large number of openings on a portion facing the filter (2).
(1) Filter cover (3) provided rotatable relative to
The filter cover (3)
And a scraper (31) substantially slidably contacting the filter (2). The dust and lint collected on the filter (2) by the relative rotation of the filter cover (3) and the filter (2) during the drying operation are removed. In the filter device of the clothes dryer in which the scraper (31) is collected in the forward direction in the direction of rotation of the clothes dryer, the dust and the like accumulated in the forward direction in the direction of rotation of the scraper (31) may flow into the rotating drum (1) or flow backward. The task is not to do so.

[0008]

[Technical means] The technical means of the present invention for solving the above-mentioned problem is as follows: "The scraper (31) rotates together with the filter cover (3) during the drying operation, and the filter (2) of the filter cover (3) A non-opening portion (3a) provided from the disposition portion of the scraper (31) to a certain range ahead of the filter cover (3) relative to the filter (2) in the direction of rotation relative to the filter (2).
And a ventilation portion (3b) in which a number of openings (30) and (30) are arranged in a band shape and in an arc shape so as to connect both ends thereof. "

[0009]

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. When the amount of accumulated dust and the like increases, the dust tends to flow back into the rotating drum (1) as described above.However, the rotating drum (1) side of the accumulation portion of the dust and the like has a non-opening portion of the filter cover (3). Since it is closed by 3a), the backflow and the protrusion can be prevented.

The larger the area of the non-opening portion (3a), the more dust and the like can be accommodated and accumulated in the space between the non-opening portion (3a) and the ventilation portion of the filter (2). When the area of the portion (3b) is reduced, the resistance of the exhaust from the inside of the rotary drum (1) increases, which is not desirable. Therefore, the resistance is set so as not to greatly increase the resistance to the passage of the exhaust gas from the filter cover (3). That is, the ventilation part (3) of the filter cover (3)
The area of the non-opening portion (3a) is set so that the passage resistance of b) is equal to or smaller than the passage resistance of the filter (2). For example, it is set to about two thirds of the case where the ventilation portion (3b) is formed over the entire circumference.

[0011]

[Effect] Even if a large amount of dust or the like is accumulated in the front of the relative rotation direction of the scraper (31), the dust does not flow back into the rotating drum (1), and clothes and the like in the rotating drum (1) are accumulated once. There is no need to worry about contamination by dust and the like.

[0012]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. In the first embodiment shown in FIGS. 4 to 6, the ventilation portion (3a) of the filter cover (3) has a large number of spirally curved bars (33) (3).
3) and one annular bar (34) are formed, and openings (30) (30) are formed between the bars.

Hereinafter, a filter device provided at the center of the back surface (10) of the rotary drum (1) and having the filter cover (3) will be described in detail. [Back filter (21)] Also in this embodiment, as in the prior art, an annular exhaust port having a large number of through holes formed in the center of a rear wall (10) serving as a rear wall of the rotary drum (1). A back filter (21) is fixed inside the rotating drum (1) of the section (11).

The back filter (21) is a rotary drum.
(1) a shaft insertion portion (22) which is fitted to the rotary shaft portion, and an outer peripheral frame (23) detachably attached to an outer peripheral portion of the exhaust port (11).
And a radial bar (not shown) stretched between them,
The filter sheet (24) is stretched between the shaft insertion portion (22) and the outer peripheral frame (23). Then, the back filter (2
In order to make 1) detachable, a plurality of (four) key-shaped locking pieces 25, 25 protruding from the back of the outer peripheral frame 23 are provided at the exhaust port of the rotary drum 1. The rotary shaft cover (J) is screwed in and fixed to a locking hole (12) provided in the outer peripheral area of the portion (11). 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.

Inside the back filter (21), a filter (2) rotating integrally with the rotary drum (1), and an auxiliary filter
(7) is provided. [Filter (2)] As shown in FIGS. 4 and 8, the filter (2) is spline-fitted to an annular portion (22a) provided in the shaft insertion portion (22) of the back filter (21). A cylindrical shaft portion (26) loosely fitted in a paired state, an annular wall (27) and a peripheral tongue portion (271) provided on an outer peripheral annular frame, and projecting from the middle of the cylindrical shaft portion (26). Flange portion (F ₁ ) and the annular wall (27)
Flange (F ₂ ) protruding inside the filter, and a fixed width annular filter sheet (28) stretched so as to connect these flanges to each other (200 mesh: equivalent to the ventilation part (2a)) As shown in FIG. 9, the filter (2) is formed by spline fitting (smooth pair) between a plurality of convex portions provided on the outer periphery of the cylindrical shaft portion (26) and a plurality of concave portions of the annular portion (22a). And the rotary drum (1) are integrally rotated.

The auxiliary filter (7) is, as shown in FIGS.
It is attached to the filter (2) and located on the back filter (21) side with respect to the filter (2). The auxiliary filter (7) includes a filter sheet (70) (100 mesh) coarser than the filter sheet (28) of the filter (2). As in 22a),
An annular mounting plate (7
2), the filter sheet between the peripheral annular frame (73)
(70) is a structure to be stretched.

An annular mounting plate (72) for the auxiliary filter (7)
On one side of the flange part (F ₁)
The key-shaped engaging projections (74) (7)
4), and the opposite surface matches this engagement protrusion
Operation protrusions (75) and (75) are formed at the positions. This auxiliary file
The filter (7) fits the annular mounting plate (72) to the cylindrical shaft (26).
9, a plurality of notches (72a) in the center hole and
Relative rotation prevention by fitting the cylindrical shaft (26) with the protrusion (26a)
State, and the engagement holes (9) (9) and the engagement protrusions (74) (74)
It is mounted in a retaining state by engaging with The staff
The mating projections (74) and (74) engage with the inner side of the engaging hole (9) from outside.
It has a relationship. Therefore, the operation protrusions (75) and (75)
Pinch and tilt it inward, the engaging projections (74) and (74)
The auxiliary filter (7) is removed from the engagement holes (9) (9)
(2) can be removed.

[Filter cover (3)] Filter cover
(3) is formed in a dish shape as a whole, and a drive projection (39) projecting into the rotary drum (1) is provided in a part near the periphery thereof, and an annular wall (5) of the filter (2) is provided on the periphery. An annular inner wall (35) that fits loosely on the outer peripheral frame (23) of the back filter (21), and an annular outer wall that fits loosely on an annular rib (23a) formed on the periphery of the outer frame (23) of the back filter (21). (36), and an engagement cylinder (4) is provided at the center rear surface so as to be loosely fitted to the rotary shaft lid (J) of the rotary drum (1) in a state where it cannot be removed. This engagement cylinder (4)
As shown in the rear view of FIG. 6, slits (41) and (41) which are partially opened in the axial direction are provided so as to be elastically deformable in the radial direction. A protrusion (42) partially projecting from the annular groove (J ₁ ) formed in the rotating shaft lid (J)
Is loosely fitted.

The engagement projections (4a) (4a) provided at two places on the outer periphery of the engagement cylinder (4) are connected to the rotary drum (1) side of the cylinder shaft (26) of the filter (2). Engagement pawls provided on the inner circumference of the end over substantially the entire circumference
(26b) are engaged in the axial direction. Therefore, the filter cover (3) rotates integrally with the rotary drum (1) because the fitting portions of the rotary shaft cover (J), the filter (2), and the back filter (21) are all in a loosely fitted state. Relative to the filter (2).

Further, as shown in FIGS. 4, 5, 6, and 9, a part of the outer wall (36) and the outer periphery of a portion where the scraper (31) is provided, as shown in FIGS. (361) is provided, and a peripheral portion located further outside the annular wall (27) of the filter (2).
(271). That is, the engagement tongue piece (361) prevents the peripheral edge portion from escaping from the outer wall (36) of the filter cover (3) to the outside (back filter (21) side). One end of the engaging tongue piece (361) is located at a position away from the scraper (31) forward in the rotation direction,
The engaging tongue piece (361) is disposed at least a certain range forward from the outermost end of the scraper (31).

As shown in FIG. 5, among the flat portions of the filter cover (3), the annular band facing the ventilation portion (2a) of the filter (2) has a large number of openings (30) and (30). An arc-shaped ventilation part (3b) formed through and a non-opening part (3a) sandwiched between both ends of the ventilation part. The area of the non-opening portion (3a) is desirably set so as not to increase the passage resistance of the exhaust gas, and the passage resistance from the ventilation portion (3b) is reduced by the passage resistance of the filter sheet (28). Is also small,
The area of the non-opening (3a) is set.

The ventilation part (3b) has a central disk part (37) provided with the engaging cylinder part (4) and an outer peripheral part (38) provided with the inner wall (35) and the outer wall (36). And a number of spiral curved bars (33), (33) provided between them, and an annular bar (34) connecting slightly outside the middle of these bars. A scraper is attached to the back of one curved bar (33) located at the back of the non-opening (3a) and at the rear end of the filter cover (3) in the direction of rotation relative to the filter (2).
(31) is formed to protrude. The rear edge of the scraper (31) has a configuration in which small projections are continuous at a predetermined pitch, 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 shifted from each other, and the two 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 clothes fall, a relative rotational force is applied by contact between the clothes and the drive projection (39), 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 peripheral ends of the scraper (31) and the curved bar (33).
Since an annular lint housing portion (3c) is formed between the outer peripheral portion (38) and the flange portion (F ₂ ), a part of the dust accumulation body (M) moved to the outer peripheral side is shown in FIG. As shown in (b), the lint is stored or escaped on the lint storage section (3c) side. 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 (3c). Normally, about 60% of the filter sheet (28) of the filter (2) is covered with dust or the like, and it is necessary to clean the filter device to remove the dust and the like. , The lint housing part (3c) is filled with dust and the like, and the dust stack (M) on the front side of the scraper (31) is filled.
Can be continuously used to the extent that the amount reaches about 60% of the filter sheet (28). Therefore,
It can be used continuously for a much longer time than one without a scraper.

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 of (34) to the surface of the filter sheet (28) is set to about 1/3. [Embodiment 2] This embodiment is different from Embodiment 1 only in the configuration of the scraper (31) and the ventilation part (3b) in the filter cover (3). 1 is configured exactly the same.

As shown in FIGS. 10 and 11, the ventilation portion (3b) is provided with four scrapers (31) and (31) and reinforcing bars connected to the inner edges of the scrapers (31) inside the rotating drum. The scraper (31) is composed of a plurality of annular bars (34) and (34),
It is formed in a spiral shape over a range of about 1/4 circumference in the circumferential direction of the ventilation part (3b). In this device, the sections surrounded by the scrapers (31) and (31) and the annular bars (34) and (34) become openings (30) and (30), and a fixed amount is provided on the front side in the relative rotation direction of each of the scrapers (31). The range is a non-opening portion (3a) that is a closing piece (311) that partially closes the opening (30). The area of the non-opening (3a) is set to the same value as in the above embodiment.

In this embodiment, the filter cover (3) is relatively rotated by contact with the garment in the same manner as in the above embodiment (1), so that the back surface of the ventilation section (3b) and the filter sheet (28) are separated. Dust and the like are accumulated in the front part in the relative rotation direction of the scraper (31). Then, the dust accumulation body (M) is moved to the outer peripheral side by the same operation as that of the first embodiment, but the annular bars (34) and (34) are located on the rear side of the ventilation part (3b). Since they do not protrude, these annular bars (34) (34) 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. Further, even if the amount of the dust accumulation body (M) is increased,
(1) The backflow (return) into the inside is prevented by the closing piece (311).

[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 the relative rotation to one side, an angled projection (5) as shown in FIG. 12 may be formed on the outer peripheral surface of the filter cover (3) as the driving projection (39). . In the angled projection (5), the surface in the relative rotation direction of the filter cover (3) is an inclined surface (51), and the other surface is a vertical surface (52). Therefore, in this case, when the clothes in the rotating drum (1) and the filter cover (3) move relative to each other, FIG.
When the clothes move clockwise in, this makes it easy for the filter cover (3) to rotate clockwise,
When moving in the reverse direction, almost no rotational force is applied. Therefore, the rotating drum (1) of the filter cover (3)
And relative rotation to one side with respect to the filter (2) is further ensured. Note that the direction of the relative rotation may be set in a direction opposite to the rotation direction of the rotary drum (1), and the driving protrusion (3
9) may be a sub number (for example, 3 or 4).

In the above embodiment, the filter cover
Although (3) is configured to rotate mainly in one direction relative to the filter (2), the present invention can also be implemented in a configuration that rotates relatively in both directions. In this case, the non-opening portion (3a) may be formed on both sides of the scraper (31) according to the rotation rate.

In the first embodiment, the filter cover
(3) rotates in one direction relative to the rotating drum (1),
The ratio of the relative rotation amount in this direction to the relative rotation amount in the opposite direction is 9: 1. Therefore, 10 of the non-opening part (3a)
% Is provided behind the scraper (31) in the relative rotation direction as the reverse rotation corresponding portion (3a ₁ ).

[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 a detailed view of a main part of the filter cover (3), the filter (2), and the auxiliary filter (7).

FIG. 9 is a rear view thereof.

FIG. 10 is a front view of a filter cover (3) according to a second embodiment.

FIG. 11 is a sectional view taken along line XX of FIG.

FIG. 12 is an explanatory view of another example of the driving projection (39).

[Explanation of symbols]

 (1) ・ ・ ・ Rotating drum (2) ・ ・ ・ Filter (3) ・ ・ ・ Filter cover (31) ・ ・ ・ Scraper (33) ・ ・ ・ Curved bar (36) ・ ・ ・ Outer wall (361) ・ ・Engagement tongue (4) ... engagement cylinder (26) ... cylinder shaft

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-150788 (JP, A) JP-A-60-122598 (JP, A) JP-A-60-68897 (JP, A) JP-A-60-1988 63099 (JP, A) JP-A-60-53195 (JP, A) JP-A-60-48794 (JP, A) JP-A-60-63098 (JP, A) Real opening 60-63200 (JP, U) Japanese Utility Model Showa 61-56991 (JP, U) Japanese Utility Model Showa 64-55897 (JP, U) Japanese Utility Model Showa 62-134595 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) D06F 58/02

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).
And (2) a cover which covers the filter (2) from the inside of the rotary drum (1) and has a ventilation portion having a large number of openings on a portion facing the filter (2). A filter cover (3) provided on the drum (1) so as to be relatively rotatable; and the filter (2) protruding from the filter cover (3).
The filter cover (3) and the filter during the drying operation.
(2) A filter device for a clothes dryer in which dust and lint collected in the filter (2) by the relative rotation with the filter (2) are collected by the scraper (31) forward in the rotation direction of the scraper (31). 31) is the filter cover during the drying operation
(3), the filter cover (3) faces the filter (2) in a fixed area in the direction of rotation of the filter cover (3) relative to the filter (2). And a ventilation section (3a) in which a number of openings (30) (30) are arranged in a band and arc so as to connect both ends thereof.
and b) a filter device for a clothes dryer. 2. A filter cover (3) and a filter (2) are arranged in the center of a rear wall of a rotary drum (1) in the form of concentric disks, and a ventilation part (2a) of the filter (2) is attached to the filter. (2), and an annular frame portion continuously provided inside and outside the annular ventilation portion (2a) rotatably contacts the filter cover (3) over the entire circumference. The arc-shaped ventilation part (3b) of the filter cover (3) is
2. The arrangement according to claim 1, wherein the arrangement is arranged on substantially the same circumference as that of (2a).
3. The filter device for a clothes dryer according to claim 1. The scraper (31) is inclined such that the inner peripheral side is forward and the outer peripheral side is rearward in the direction of relative rotation of the filter cover (3) with respect to the filter (2), and is inclined in the same direction. The clothes drying device according to claim 1 or 2, wherein the plurality of curved bars (33) (33) to be protruded from the non-opening portion (3a) and the ventilation portion (3b) of the filter cover (3) toward the filter (2). Machine filter device. 4. A filter device for a clothes dryer according to claim 3, wherein the scraper (3) and the curved bars (33) (33) are formed in a similar spiral shape extending in the same direction.