JPH07236796A - Filter device of clothes dryer - Google Patents

Abstract

PURPOSE:To reduce the frequency of cleaning of a filter device by a method wherein curved frames, projecting on the rear side of a vent hole forming part and extending from the radially inward side of the vent hole forming part to the outward side, are slanted in the direction of the circumference of a filter cover and in the same direction as a scraper, and consequently, dust, or the like, accumulated on the forward side in the direction of the revolution of a scraper, is moved toward the radially outward side. CONSTITUTION:A vent hole forming part, penetratingly forming a large number of openings 30 at the flat part of a filter cover 3, comprises a mid disk part 37 equipped with a connecting cylinder, a large number of spiral, curved frames 33 laid between the mid disk part and a peripheral part 38 equipped with an inner wall and an outer wall, and an annular frame 34 connecting the curved frames at an almost mid but a little outward position, and a scraper 31 is projectingly formed on the rear of one of the curved frames 33. The scraper 31 is slanted so that the inward side of the vent hole forming part is ahead and the outward side is behind in the direction of a rotation of the filter cover 3 relative to a filter 2, and the curved frames 33 are formed so as to slant in the direction of the circumference of the filter cover 3 and in the same direction as the scraper 31.

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 in the center of an exhaust side wall surface of a rotary drum for accommodating clothes. The present invention relates to a filter device including a filter and a filter cover that covers the filter to prevent contact with clothing.

[0002]

2. Description of the Related Art A filter device of this kind has already been disclosed in Japanese Utility Model Laid-Open No. 61-56991.
In this one, as shown in FIGS. 1 to 3, the rotary drum (1)
Wet air is exhausted through a disk-shaped filter (2) provided in the center of the back surface of the rotary drum (1), and the rotary drum (1) has a large 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 case, the clothes contained in the rotating drum (1) are agitated by the rotation of the rotating drum (1), and then dried by the heated air sent into the rotating drum (1) to dry the clothes. The humid air is exhausted from the exhaust outlet to the outside through an exhaust passage such as an exhaust pipe by an exhaust fan (not shown) provided on the back surface of the filter (2).

During 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 that these dusts and the like clogging the exhaust path and being discharged to the outside of the dryer is eliminated. When the drying process is repeatedly performed, dust and the like are finally accumulated on the entire surface of the filter (2) and the filter cannot be dried. In such a state, it is necessary to disassemble the filter device and clean it to remove dust and the like accumulated on the filter (2).

In this conventional device, the filter cover (3)
The scraper (31) that bends in an arc shape is provided on this so that it contacts the surface of the filter (2).
The (31) is attached in an inclined state such that the inner peripheral side is the front side and the outer peripheral side is the rear side in the relative rotation direction of the filter cover (3) with respect to the filter (2). Also,
Protrusions (3a) (3a) are provided on the surface of the filter cover (3). Therefore, the protrusion (3a) (3a) and the rotary drum (1)
The filter cover (3) is relatively rotated with respect to the filter (2) by contact with the clothes inside, whereby dusts and the like accumulated on the filter (2) are attracted 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 until the filter device needs to be cleaned becomes longer.

However, in practice, even with this conventional technique, the effect of preventing clogging cannot be said to be sufficient. The dust and the like scraped by the scraper (31) is pushed out to the outer peripheral side by the relative rotational force between the scraper (31) and the filter (2), and rather, the dust and dirt are scraped off by the scraper (31).
This is because they are accumulated on the front side in the rotation direction of (31) and are difficult to move to the outer peripheral side for the reason described later.

Particularly, in the prior art in which the scraper (31) is provided with a plurality of slits (31a) (31a), accumulated dust (hereinafter referred to as dust accumulation body (M)) The dust accumulation body (M) is formed by being caught by the slit. Further, radial bars (32) (32) extending in the radial direction project toward the dust accumulation body (M) side in 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 collecting body (M) is equal to that of the filter cover having a large number of openings.
It grows until it reaches between the inner surface of the ventilation hole forming part of (3) and the surface of the filter (2), and further reaches a wide range on the front side in the rotation direction of the scraper (31). Therefore, the radial bars (32) (32) project into the dust collecting body (M). On the other hand, the extension direction of the radial bar (32)
Since it is almost perpendicular to the tangential direction of the outer peripheral edge of (31) and is different, the dust accumulation body (M) is caught by these radial bars (32) and (32) when the scraper (31) rotates. It will prevent the body (M) from moving outward.

From the above facts, in the above-mentioned prior art, the scraper (31) provided for scraping the dust collecting body (M) to the outer peripheral side does not sufficiently exhibit its function. The present invention has been made in view of the above points, and "a filter (2) provided in the ventilation path from the rotary drum (1) to the exhaust outlet and rotating integrally with the rotary drum (1), Filter cover provided with a large number of ventilation holes on the inner surface side of the rotating drum (1) so as to be rotatable relative to each other at regular intervals.
(3) and a scraper (31) provided on the back surface of the filter cover (3) and substantially in sliding contact with the filter (2) '', the front of the scraper (31) in the rotating direction. It is an object of the present invention to make it possible to reliably move dust or the like accumulated on the outer peripheral side to significantly reduce the frequency of cleaning the filter device.

[Invention of Claim 1]

[0010]

[Technical Means] The technical means of the present invention for solving the above-mentioned problem is that "a vent hole forming part of a filter cover (3) having a large number of openings (30) (30) is ), And the scraper
The reference numeral (31) is arranged in the ventilation hole formation portion so that the ventilation hole formation portion is inclined so that the inner circumference side is the front side and the outer circumference side is the rear side in the relative rotation direction of the filter cover (3) with respect to the filter (2). A curved bar (33) (33) that protrudes from the rear surface side of the air hole forming portion and extends from the inner peripheral side of the air hole forming portion to the outer peripheral side thereof.
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. It should be noted that this relative rotation is imparted by the relative movement of the clothes and the like housed in the rotary drum (1) and the rotary drum (1). Normally, the movement of clothes and the like in the rotating drum (1) is not uniform, but moves wavy. That is, a substantially stopped state, a low-speed moving state in which the rotary drum (1) moves in synchronization, a high-speed moving state (movement in which the rotary drum (1) falls), and the like are repeated.

Therefore, the filter cover (3) is, so to speak, intermittently moved. For example, when the filter cover (3) changes from a stopped state or a low speed moving state to a high speed moving state, the filter cover (3) is accumulated in front of the scraper (31). Due to the relationship with the inertial force for maintaining the stopped state or the low speed movement state of the dust collecting body (M), the dust collecting body (M) has a scraper (3
The external force that moves in the tilt direction of 1) acts. At this time,
Curved bars (33) (33) project from the inner surface of the air hole forming portion and bite into the dust collecting body (M) .The arrangement direction of the curved bars (33) is the scraper (31). Since it is inclined in the same direction as), it does not become a resistance when the dust accumulation body (M) moves.
Therefore, when the dust accumulation body (M) accumulated on the front side in the moving direction of the scraper (31) reaches a predetermined amount, the filter cover
The dust accumulation body (M) is smoothly moved to the outer peripheral side of (3), and a part of the dust accumulation body (M) escapes and is stored in the peripheral portion of the filter cover (3). After that, the movement toward the outer peripheral side is repeated every time the amount of the dust accumulation body (M) reaches a predetermined amount.

[0013]

[Effect] The dust accumulation body (M) accumulated in front of the scraper (31) relative to the filter (2) in the direction of one movement is repeatedly and smoothly moved to the outer peripheral side, and the scraper (3) in the filter cover (3) ( 31) and the amount of dust accumulated on the outer peripheral part of the scraper (31) and the amount of dust accumulated on the front part in the moving direction of the scraper (31) are within an allowable value Until the passage area reaches a value where a predetermined area is secured), the filter device can be used without cleaning, so the frequency of cleaning the filter device decreases.

[Invention of Claim 3] This invention solves the same problem as that of the invention of Claim 1 described above, and the technical means adopted for this purpose is "a large number of openings (30) (30)". ) Is formed in the vent hole forming portion of the filter cover (3) which is concentric with the filter cover (3) and is formed in an annular shape, and the scraper (31) has 1 or A plurality of scrapers (31) are formed in a substantially spiral shape in which the inner peripheral side of the vent hole forming part is the front and the outer peripheral side is the rear in the relative rotation direction of the filter cover (3) with respect to the filter (2). The ventilation hole forming portion is composed of the scraper (31) and a reinforcing bar projectingly formed at the end of the scraper (31) facing the inside of the rotating drum (1).

In this case, the filter (2) of the scraper (31)
Dust collector accumulated in the forward direction relative to the above
(M) only contacts the scraper (31) and hardly contacts the reinforcing bars, so when the amount of dust accumulation (M) reaches the specified amount, it is attempted to move to the outer peripheral side. However, the reinforcing bar does not act as a movement resistance, and a part of the dust accumulation body (M) is moved to the outer peripheral side more smoothly, and the same effect as that of the invention of claim 1 or more can be obtained.

[0016]

Embodiments of the present invention described above will now be described in detail with reference to the drawings. Embodiment 1 shown in FIGS. 4 to 6 corresponds to the embodiment of the invention of claim 1 described above, in which the ventilation hole forming portion of the filter cover (3) has a large number of spiral curved bars. (33) (33) and one ring cross ring (34) are formed.

The relationship between the rotary drum (1) and the filter (2) will be described in detail below. Also in this embodiment, as in the conventional one, the back filter (2) is provided inside the rotary drum (1) of 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) externally fitted to the rotary shaft portion of the rotary drum (1) and an outer peripheral frame (removably attached to the outer peripheral portion of the exhaust port portion (11). 2
3) and radial bars (not shown) stretched between them
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) removable, a plurality of hook-shaped locking pieces (25) (25) protruding from the back surface of the outer peripheral frame (23) are provided in the rotary drum (1). Locking hole provided in the outer peripheral area of the mouth (11)
The rotary shaft lid (J) is fixed by screwing it in (12). Since the entire back filter (21) is made of elastic synthetic resin, if the back filter (21) is peeled off from the back wall (10) after the rotary shaft lid (J) is removed, the locking piece The back filter (21) can be removed by pulling out (25) from the locking hole (12).

The filter (2) is detachably engaged with an annular portion (22a) provided in the shaft insertion portion (22) and is loosely fitted into the shaft portion of the rotating drum (1) (a cylindrical shaft portion ( 26), the annular wall (27) on the outer peripheral side, the flange portion (F ₁ ) which is projected from the middle of the tubular shaft portion (26), and the annular wall (27). The cylindrical portion includes a flange portion (F ₂ ), a plurality of radial bars (not shown) connecting the flange portions to each other, and a filter sheet (28) attached to the inside of the rotary drum (1). By engaging the part (26) with the annular part (22a),
(2) and the rotary drum (1) are integrally rotated.

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

The flat surface of the filter cover (3) is provided with a vent hole forming portion through which a large number of openings (30) (30) are formed.
The vent hole forming portion is provided between the central disk portion (37) having the engaging cylinder portion (4) and the outer peripheral portion (38) having the inner wall (35) and the outer wall (36). A large number of spiral curved bars installed on the
(33) It consists of (33) and an annular bar (34) that connects the outside slightly from the middle of these, and a scraper is attached to the back of one curved bar (33).
(31) is formed so as to project. The edge on the back side of the scraper (31) has a structure in which small chevrons are continuous, and the chevron continuous portion (31a) contacts the filter sheet (28) of the filter (2).

In addition, the inner peripheral edge and the outer peripheral edge of the curved bar (33) are displaced in the circumferential direction, and the both ends and the filter cover (3).
The angle between the line connecting the center of the filter cover and the center of the filter cover is about 30 degrees. In this embodiment, the relative rotation direction of the filter cover (3) is the fall of clothes caused by the rotation direction of the rotating drum (1). It is determined by the relationship with the direction. That is, when the clothes are dropped, a relative rotational force is applied by the contact between the clothes and the protruding portion (3a), which is adopted for the filter cover (3) which rotates clockwise in FIG. In this relative rotation direction, the inner peripheral side of the curved bar (33) is forward of the outer peripheral side.

The curved bars (33) are filter covers.
An annular bar (34) is formed on the inner end of the rotary drum (1) of the curved bars (33) and (33) with a bar having a constant width protruding to the back surface side of (3). In the case of this embodiment, dust or the like adheres 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 scraped by the scraper (31). As shown in FIG. 7, the dust collected in this manner is accumulated in the front part of the scraper (31) in the relative rotation direction to form a dust accumulation body (M). As described above, when this reaches a certain amount (for example, the degree of deformation fan shape with the angle θ = 30 to 40 degrees), the rotational force of the scraper (31) rotating intermittently and the inertial force of the dust accumulation body (M) are Due to the correlation, a part of the dust accumulation body (M) is moved to the outer peripheral side when the scraper (31) is accelerated.

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).
A ring-shaped lint accommodating part between the peripheral edge and the flange (F ₂ )
Since (39) is formed, the dust aggregate moved to the outer peripheral side
A part of (M) is stored or escaped to the lint storage section (39) side as shown in (B) of the figure. When the amount of the dust accumulation body (M) is increased to a predetermined amount, the above operation is performed every time the intermittent rotation of the filter cover (3) is increased, and a part of the dust accumulation body (M) is moved to the outer peripheral side. To be stored in or escaped from the lint storage section (39). Normally, it is necessary to clean the filter device with about 60% of the filter sheet (28) of the filter (2) covered with dust or the like, but in this embodiment, the lint storage section (39) is required. The inside of the scraper (31) can be continuously used until the amount of the dust accumulation body (M) on the front side of the scraper (31) reaches the above-mentioned amount with respect to the filter sheet (28) when dust and the like are filled therein.

In this embodiment, the protruding width of the curved bar (33) to the back 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, and as shown in FIG. You may make it smaller. In this case, the dust accumulation body (M) easily moves to the outer peripheral side. This is because when the dust accumulating body (M) tries to move to the outer peripheral side, the resistance on the outer peripheral side of the filter cover (3) decreases at the protruding portion of the curved bar (33) to the back side.

[Embodiment 2] In this embodiment, the above-mentioned claim 2 is adopted.
The first embodiment corresponds to the filter cover
Only the configurations of the scraper (31) and the vent hole forming portion in (3) are different, and the other configurations are the same as those of the first embodiment. As shown in FIGS. 9 and 10, the vent hole forming portion is
Two scrapers (31) (31) and a plurality of radial bars (32) as reinforcing bars connected to the inner edge of the rotating drum of these (31)
The scraper (31) is composed of (32), and is formed in a spiral shape over the range of about one round in the circumferential direction of the vent hole forming portion.

In this case, the compartment surrounded by the scrapers (31) (31) and the radial crosspieces (32) (32) has openings (30) (3).
0). In this embodiment, the filter cover (3) is relatively rotated by contact with clothes in the same manner as the above-mentioned embodiment (1), so that dust or the like is generated between the back surface of the ventilation hole forming portion and the filter sheet (28). Are accumulated in the front part of the scraper (31). Then, the dust accumulation body (M) is moved to the outer peripheral side by the same action as in the case of the first embodiment, but
(32) (32) does not project to the back side of the ventilation hole forming part,
These radial bars (32) (32) do not resist the movement of the dust collecting body (M). Therefore, the dust accumulation body (M) accumulated in front of the scrapers (31) (31) in the rotation direction is moved to the outer peripheral side more smoothly than in the first embodiment.

This means that the arrangement area of the scrapers (31) and (31) in the circumferential direction of the vent hole forming portion is set to a range shorter than that of the embodiment of FIGS. As shown in FIG. 12, four scrapers (31) (31) are arranged over a range of 90 degrees, and a plurality of annular bars (34) (continuously connected to the inner edge of the rotary drum). Multiple openings by 34) (30)
The same applies to the configuration of (30). The circular crosspiece (3
4) (34) functions as a reinforcing bar.

[Others] Further, 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 this one side, the chevron protrusions (5) as shown in Fig. 13 are used for the filter cover.
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) and (3) move relative to each other, when the clothes move clockwise in FIG. 5, this causes the filter cover (3) to be easily driven to rotate, and when the clothes move in the opposite direction, almost no rotational force is applied. . Therefore, the filter cover
The relative rotation of (3) with respect to the rotating drum (1) and the filter (2) in one direction becomes more reliable.

[Brief description of drawings]

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

[Figure 2] Front view

FIG. 3 is an enlarged sectional view of an essential part.

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

[Figure 5] Front view

[Fig. 6] Rear view of the filter cover (3)

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

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

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

FIG. 10 is a sectional view of the main part

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

FIG. 12 is a sectional view of the main part

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

Claims (4)

[Claims] 1. A filter provided in a ventilation path from a rotating drum (1) to an exhaust outlet and rotating integrally with the rotating drum (1).
(2), a filter cover (3) provided with a large number of vent holes, which are provided on the inner surface side of the rotary drum (1) so as to be rotatable relative to each other at regular intervals, and the filter cover (3)
In a filter device for a clothes dryer, which comprises a scraper (31) provided on the back surface of the filter and substantially slidingly contacting the filter (2),
The ventilation hole forming part of the filter cover (3) having a large number of openings (30) (30) is concentric with the filter cover (3) and formed in an annular shape, and the scraper (31) is a filter. In the relative rotation direction of the filter cover (3) with respect to (2), the ventilation hole forming portion is inclined so that the inner peripheral side is the front side and the outer peripheral side is the rear side, and the air is formed in the ventilation hole forming section. The curved bar (33) (33) that protrudes from the inner surface of the ventilation hole and extends from the inner peripheral side to the outer peripheral side of the vent hole forming part is provided in the scraper in the circumferential direction of the filter cover (3). A filter device for a clothes dryer, which is shaped to be 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 crosspieces (33) (33) are both spiral and extend in the same direction with respect to the circumferential direction. . 3. A filter provided in a ventilation path from the rotating drum (1) to an exhaust outlet and rotating integrally with the rotating drum (1).
(2), a filter cover (3) provided with a large number of vent holes, which are provided on the inner surface side of the rotary drum (1) so as to be rotatable relative to each other at regular intervals, and the filter cover (3)
In a filter device for a clothes dryer, which comprises a scraper (31) provided on the back surface of the filter and substantially slidingly contacting the filter (2),
The vent hole forming part of the filter cover (3) having a large number of openings (30) (30) is concentric with the filter cover (3) and formed in an annular shape, and the scraper (31) is passed through. The scraper (31) is a filter cover for the filter (2), and one or more are formed on the back surface of the pore forming part.
(3) In one relative rotation direction of one, the inner peripheral side of the ventilation hole forming part is a front side and the outer peripheral side is a rear side in a substantially spiral shape,
The ventilation hole forming portion is a filter device for a clothes dryer, which comprises the scraper (31) and a reinforcing bar projectingly formed on an edge of the scraper (31) facing the rotating drum (1). 4. The filter cover (3) is provided with a protrusion (3a) on the inner surface of the rotary drum for contacting clothes.
4. The filter device for a clothes dryer according to any one of 3 to 3.