JP2011153761A - Automatic filter cleaning device and air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic filter cleaning device preventing increase in air course pressure loss due to a dust collecting filter and eliminating labor and time of a person during cleaning of the dust collecting filter, and an air conditioner including the automatic filter cleaning device. <P>SOLUTION: The automatic filter cleaning device includes: the dust collecting filter arranged in an air flow passage and collecting dust in the air made to flow in the air flow passage; and a dust removing body removing the dust collected by the dust collecting filter. The dust collecting filter is formed to have a belt shape wound astride a pair of rotating rollers and has an opening formed on a face positioned on the downstream side of the air flow passage of the dust collecting filter. Elastic bar-shaped bodies are arranged in the opening to remove the dust adhered to the dust removing body. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a dust collection filter used in an air conditioner or the like, and more particularly to an automatic filter cleaning device that automatically cleans a dust collection filter.

  Generally, a ceiling-embedded air conditioner (indoor unit) sucks indoor air from a suction port by a fan, adjusts the temperature of the indoor air in a heat exchanger, and blows out the temperature-adjusted air from the air outlet into the room. ing.

  A dust collection filter is installed at the suction port in order to prevent floating substances such as dust existing in the room air from entering the ceiling-embedded air conditioner. When the operation of the ceiling-embedded air conditioner is continued, the suspended matter in the room air gradually accumulates in the filter. And there existed a subject that the air resistance of a filter increased by the floating substance adhering to the filter and accumulate | stored, leading to a deterioration of operating efficiency and a reduction of energy saving property. Therefore, it is necessary to remove airborne substances such as dust accumulated on the filter.

  Moreover, many ceiling-embedded air conditioners are installed at high places, and it has been difficult to use a stepladder or the like when cleaning the filter. Therefore, many technical proposals related to cleaning of the filter have been made.

  For example, as a conventional technique, for the purpose of obtaining an air filter for an air conditioner that can remove dust from room air only on the front side of a looped air filter and that allows the ventilation resistance of the filter medium to be only on the front side, 1 An air conditioner that is hung on a pair of rotating shafts and formed into a ring so as to be driven to turn, and is formed of a fine filter medium with a mesh that has a filtering function only on the front side of the air filter, and has no filter medium on the rear side. An air filter for a machine is known (for example, see Patent Document 1).

  In addition, as a conventional technique, for the purpose of automatically detecting a deterioration in function due to contamination of the cleaning unit and informing the user of the air conditioner that maintenance is necessary, To move the filter and the cleaning mechanism relative to each other, a filter that collects dust in the air sucked from the suction port, a dust cleaning means that scrapes the dust adhering to the filter in contact with the filter, and scrapes the dust. A motor for applying the driving force, a current detection means for detecting the drive current value of the motor, and a notification means that the maintenance time is informed when the drive current value detected by the current detection means is equal to or greater than a threshold value. There is known an automatic filter cleaning device for an air conditioner including a control device (for example, see Patent Document 2).

Japanese Utility Model Publication No. 63-82414 (Page 5, line 8, Fig. 1) JP 2009-250449 A ([0010] paragraph, FIG. 3)

  The air conditioner described in Patent Document 1 is formed of a fine filter medium with a mesh that is hung on a pair of rotating shafts and formed into a ring shape so as to be turn-driven and has a filtering action only on the front side of the air filter. However, the rear side is equipped with an air filter that does not have a filter medium, but the rear side part that does not have the filter material of the air filter formed in the endless ring is simply a wasteful part. It was. Moreover, although the dust adhering to the filter medium of a filter is attracted | sucked by the filter cleaning apparatus, since the filter cleaning apparatus was operated manually, there was a problem of bothering human hands during filter cleaning.

  When the filter automatic cleaning mechanism of the air conditioner described in Patent Document 2 scrapes off the dust on the filter, the dust cleaning brush scrapes off the dust adhering to the filter, and further the dust scraping brush. The comb-shaped part arranged so as to comb the hair is configured to drop the dust remaining on the dust scraping brush into the dust box, but the dust remains attached to the comb-shaped part. In some cases, human hands were bothered to remove this dust.

  The present invention has been made to solve the above-described problems, and prevents an increase in air passage pressure loss due to a dust collection filter and does not bother a human hand when cleaning the dust collection filter. And it aims at providing the air conditioner provided with this automatic filter cleaning apparatus.

  An automatic filter cleaning device according to the present invention removes dust collected in a dust collection filter that is disposed in an air flow path and collects dust in the air flowing through the air flow path. The dust collection filter has a belt shape wound around a pair of rotating rollers, and has an opening formed on a surface located downstream of the air flow path of the dust collection filter. The elastic bar-like body is disposed in the opening, and the elastic bar-like body removes dust adhering to the dust removing body.

  ADVANTAGE OF THE INVENTION According to this invention, while preventing the increase in the air path pressure loss by a dust collection filter, the automatic filter cleaning apparatus which does not bother a human hand at the time of dust collection filter cleaning, and the air conditioner provided with this automatic filter cleaning apparatus Can be obtained.

It is an external view at the time of ceiling installation of the air conditioner concerning Embodiment 1. FIG. 1 is a longitudinal sectional view of an air conditioner according to Embodiment 1. FIG. It is a horizontal sectional view of the air conditioner concerning Embodiment 1, and is a horizontal sectional view in the XX plane of FIG. 3 is a perspective view of an automatic filter cleaning mechanism unit according to Embodiment 1. FIG. 3 is a configuration diagram in the vicinity of a dust box according to Embodiment 1. FIG. FIG. 5 is a longitudinal sectional view showing the operation of the automatic filter cleaning mechanism unit according to the first embodiment. It is a longitudinal cross-sectional view of the air conditioner according to Embodiment 2. It is a longitudinal cross-sectional view of the dust box vicinity which concerns on Embodiment 2. FIG.

Embodiment 1 FIG.
1 is an external view of the air conditioner according to Embodiment 1 when mounted on a ceiling. As shown in FIG. 1, the ceiling-embedded air conditioner 1 (indoor unit) is embedded in the ceiling of a room in a state where a substantially rectangular decorative panel 2 provided in the lower part thereof is visible. Near the center of the decorative panel 2, a substantially rectangular grill 3 that communicates with the indoor air inlet of the ceiling-embedded air conditioner 1 is formed. A communication outlet 4 is formed. Furthermore, each blower outlet 4 is provided with a vane 5 for controlling the direction of the blown air.

  FIG. 2 is a longitudinal sectional view of the air conditioner according to Embodiment 1. FIG. 3 is a horizontal cross-sectional view in the XX plane of FIG. As shown in FIG. 2, the ceiling-embedded air conditioner 1 is installed on the top of the decorative panel 2 with the decorative panel 2 engaged with the grille 3 at the center by, for example, claws, and the upper and lower surfaces. Is formed of a box-shaped casement 6 having an opening, and a box-shaped unit housing 7 which is installed on the upper part of the casement 6 and has an open lower surface.

  The casement 6 houses a dust collection filter 14 (to be described later) and an automatic filter cleaning mechanism 15 for cleaning the filter, and the unit casing 7 has a bell mouth 10 (to be described later) and a heat exchanger 11. The fan 9 and the fan motor 8 are accommodated.

  As shown in FIGS. 2 and 3, a fan motor 8 is attached to a substantially central portion of the ceiling surface in the unit housing 7. The fan motor 8 is provided with a fan 9 (turbo fan) having a suction port on the lower side, and the fan motor 8 and the fan 9 constitute a blower (centrifugal blower). A bell mouth 10 for guiding air to the fan 9 is arranged below the fan 9.

  A heat exchanger 11 is arranged in a substantially annular shape (substantially C shape) so as to surround the fan 9, and a drain pan for preventing dripping of the drain generated in the heat exchanger 11 is provided below the heat exchanger 11. 12 is installed. The heat exchanger 11 constitutes a refrigeration cycle together with a compressor that compresses refrigerant of an outdoor unit (not shown). In the heat exchanger 11, the indoor air sucked from the grill 3 by the fan 9 and the refrigerant in the refrigeration cycle exchange heat to generate cold air or hot air.

  A space between the unit housing 7 and the heat exchanger 11 communicates with the blower outlet 4 of the decorative panel 2 and serves as a main body blower outlet 13 that guides air that has passed through the heat exchanger 11 into the room. . A vane 5 is attached to the air outlet 4 so that the direction of the air exchanged by the heat exchanger 11 can be adjusted. The shape of the vane 5 is substantially the same as that of the air outlet 4, and is a shape that takes into account the design property of substantially closing the air outlet 4 when the vane 5 is closed. The dust collection filter 14 is provided in the casement 6 so as to be positioned between the bell mouth 10 and the grill 3.

  Note that the storage method illustrated in FIG. 2 is an example, and the dust collection filter 14 may be provided in the unit housing 7 or may be provided in the decorative panel 2. Further, it is not always necessary to divide the casement 6 and the unit housing 7 from each other, and they may be integrally formed. However, if the filter automatic cleaning mechanism 15 is housed in the case housing 6 separate from the unit housing 7 and the decorative panel 2, it can be retrofitted (as an option) to the existing ceiling-embedded air conditioner 1. The filter automatic cleaning mechanism 15 can be attached.

  FIG. 4 is a perspective view of the automatic filter cleaning mechanism 15 according to the first embodiment. In FIG. 4, the dust collection filter 14 has a belt shape wound around a pair of rotating rollers 16, and in the air flow path through which air sucked from the room passes from the bottom to the top in FIG. 4. Is arranged. The dust collection filter 14 includes a filter body 14b that collects dust and a frame portion 14a that protects both ends of the filter body 14b. The frame portion 14a is formed of a highly flexible material such as an elastomer.

  Moreover, the opening part 14c is formed in the surface used as a substantially 1/2 circumference among the filter bodies 14b wound ranging over a pair of rotation roller 16. FIG. During the operation of the ceiling-embedded air conditioner 1, the opening 14 c is disposed on the downstream side of the air flow path, and the upstream side of the air flow path is between the pair of rotating rollers 16. Is arranged so as to cover the filter body 14b.

  An elastic rod-like body 14d is installed in the opening 14c so as to be parallel to the rotating roller 16. The elastic rod-shaped body 14d may be attached by bonding to the filter body 14b around the opening 14c. Alternatively, the filter body 14b may not be provided around the opening 14c, and in this case, the elastic rod-shaped body 14d may be attached to the frame portion 14a. The elastic rod-shaped body 14d can be constituted by a wire-like member having elasticity, for example, but can also be constituted by another material having elasticity.

  The size of the opening 14c is preferably as large as possible from the viewpoint of reducing the air resistance to the air passing through the dust collection filter 14, but the mechanical strength of the dust collection filter 14 and the function of collecting dust are ensured. The size should be designed so that it can be done. In the present embodiment, the opening 14 c is formed so that its width is substantially the same as the width of the dust collection filter 14 and its length is substantially the same as the interval between the pair of rotating rollers 16.

  The frame portion 14a of the dust collection filter 14 is formed with arc gears (not shown) on two sides (both side frame portions) parallel to the filter moving direction. The rotating roller 16 has a cylindrical shape, and arc gears (not shown) are formed on the circumferences of both ends of the rotating roller 16. The rotating roller 16 has a rotating shaft in a direction perpendicular to the filter moving direction, and the circular arc gear formed on the dust collecting filter 14 and the gear formed on the rotating roller 16 mesh with each other. 14 is driven.

  The ring-shaped dust collection filter 14 is supported by the pair of rotating rollers 16, and the filter length is adjusted so that the dust collection filter 14 can be always kept in a tensioned state. Further, the rubber-like filter support belt 17 is provided so as to cover both ends of the filter frame portion 14a from above the rotating roller 16 and the dust collection filter 14, so that the dust collection filter 14 can be driven stably. I can do it. The filter support belt 17 is driven together with the rotation of the filter.

  The brush 18 which is a dust remover is a dust scraping means comprising a rotating body formed by spirally winding a flocking tape (not shown) having a hair tip of about 15 mm on a cylindrical shaft, for example. . The brush 18 is disposed so that the rotation shaft thereof is parallel to the rotation shaft of one rotation roller 16, and is adjacent to the lower side of the rotation roller 16 and is dust-collected around the rotation roller 16 in a ring shape. It arrange | positions so that the filter 14 and the hair | bristle tip of the brush 18 may contact. In this way, the brush 18 has a function of scraping off the suspended matter collected by the dust collection filter 14. Moreover, although the contact surface to the dust collection filter 14 in the brush 18 is set as hair transplant here, you may form this contact part in a spatula shape.

  The rotating shafts of the rotating roller 16 and the brush 18 are connected to driving motors (not shown) provided outside the gear box 19 via gears (not shown) provided in the gear box 19, respectively. 16 and the brush 18 are rotated by receiving power from the drive motor.

  If the same type of drive motor is used, the system can be easily simplified and can be configured at low cost. The drive motor may be provided separately for driving the rotating roller 16 and for driving the brush 18, but the roll driving motor and the brush driving motor can be provided by multiplying gears in the gear box 19. It is possible to unify them into one, in which case further cost reduction can be expected.

  The type of the driving motor described above may be an AC motor or a DC motor, may have a speed reduction mechanism, or may have no speed reduction mechanism. Further, the motor may be provided on each of the two rotating rollers 16.

  A substantially rectangular parallelepiped dust box 20 is disposed below the brush 18 and is formed of, for example, a transparent resin so that dust can be visually recognized from the outside. The dust box 20 is disposed at a position where it can receive fallen objects from the dust collection filter 14 and the brush 18, and the dust collection filter 14 so as not to affect the air suction capability of the ceiling-embedded air conditioner 1. It is arranged at the end. The dust box 20 is configured to be removable after the grill 3 provided at the suction port of the decorative panel 2 is removed.

  FIG. 5 is a configuration diagram in the vicinity of the dust box 20 according to the first embodiment, in which the gear box 19 is viewed from the lower side of the dust box 20 in FIG. In FIG. 5, the dust box 20 is provided with a dust box stopper 21 so as to be slidable in the longitudinal direction of the dust box 20.

  On the other hand, a dust box fixing hole 22 is formed in the automatic filter cleaning mechanism portion 15 corresponding to the dust box stopper, and the dust box 20 is fixed by inserting the dust box stopper 21 into the dust box fixing hole 22. Further, when the dust box 20 is removed, the dust box stopper 21 is slid to remove the dust box stopper 21 from the dust box fixing hole 22 so that the dust box 20 can be removed.

  Note that the structure for removing the dust box 20 is not limited to this, and other known techniques such as engagement with claws may be used. Further, the filter automatic cleaning mechanism 15 does not necessarily have to be fixed, and the filter 3 may be fixed to the grill 3.

  Further, it is desirable that the rotating roller 16, the brush 18, and the dust box 20 are arranged outside the bell mouth 10 in order to reduce the suction pressure loss during the operation of the ceiling-embedded air conditioner 1.

  In addition, a control unit (not shown) is provided inside the ceiling-embedded air conditioner 1 to monitor the operation status of the ceiling-embedded air conditioner 1 and drive the drive motor (not shown). Take control. The control unit is configured by a microcomputer in which a predetermined program is incorporated.

Next, the operation will be described.
FIG. 6 is a longitudinal sectional view showing the operation of the automatic filter cleaning mechanism 15 according to the first embodiment. FIG. 6 (1) shows a state in which the ceiling-embedded air conditioner 1 is in operation, and the opening 14c and the elastic rod-shaped body 14d of the dust collection filter 14 are connected to the fan 9 side of the dust collection filter 14 (air flow). On the downstream side of the passage, the filter body 14b is located on the grill 3 side (upstream side of the air flow path). During the operation of the ceiling-embedded air conditioner 1, air flows from the lower side to the upper side in the figure, so that the dust 99 is collected on the filter body 14b located on the upstream side of the air flow, that is, the lower side in FIG. Will be.

  When the ceiling-embedded air conditioner 1 stops and the automatic filter cleaning mechanism 15 starts to operate, the rotating roller 16 is driven by the driving motor in FIG. When the circular gear formed on the gear and the filter mesh with each other, the dust collection filter 14 and the filter support belt 17 also rotate (counterclockwise in the drawing). As the dust collection filter 14 rotates, the dust 99 collected by the filter body 14 b moves in the direction of the brush 18.

  At this time, the brush 18 is also driven by the driving motor in the same direction as the dust collection filter 14 (counterclockwise in the drawing). When the dust collection filter 14 passes near the brush 18, the dust 99 collected by the filter body 14 b by the brush 18 is scraped off. The dust 99 scraped off by the brush 18 falls as it is and accumulates in the dust box 20 (FIG. 6 (2)).

  At this time, some of the dust 99 may adhere to the brush 18, but the dust 99 attached to the brush 18 successively contacts the elastic rod-like body 14 d provided in the opening 14 c of the dust collection filter 14. And is dropped into the dust box 20 ((3) in FIG. 6).

  In the present embodiment, the elastic rod-shaped body 14d is disposed so as to be parallel to the rotating roller 16, but the elastic rod-shaped body 14d removes at least dust 99 adhering to the brush 18. It suffices if it is configured, and it does not necessarily have to be arranged so as to be parallel to the rotating roller 16. Further, the elastic rod-shaped body 14d may not be linear, and may be appropriately changed according to the shape of the brush 18 that is a dust removing body, for example, formed in a wavy shape.

  When the dust collection filter 14 moves once, the rotation roller 16 and the brush 18 are stopped, and the drive of the dust collection filter 14 is stopped ((4) in FIG. 6). In order to detect that the dust collection filter 14 has made one rotation, for example, a filter detection sensor 23 may be provided above the brush, or the rotation number of the rotating roller 16 may be counted by the control unit. Further, other known techniques may be used.

  It is conceivable that the operation timing of the automatic filter cleaning mechanism section 15 is performed at various timings by the control section. For example, when the ceiling-embedded air conditioner 1 is in a normal usage pattern (mainly in the daytime and operated for 8 to 10 hours / day), the automatic filter cleaning mechanism 15 is operated after the operation is completed. What should I do?

  When the ceiling-embedded air conditioner 1 is continuously operated (convenience store or the like), the control unit causes the fan 9 to stop and operate once a day at a predetermined time when the compressor is stopped. The predetermined time may be specified by the user using, for example, a remote controller, or the fan 9 is stopped when the compressor is stopped by temperature control 24 hours after the automatic filter cleaning mechanism 15 operates. Then, it may be operated.

  The dust collection filter 14 is a roll end type that rotates using two rotating rollers 16 and may be rotated only in the same direction. In addition, a stepping motor or the like may be provided to reciprocate the filter by rotating the filter only half a circle. In this case, dust adhered to the dust collection filter 14 on the indoor air suction side is scraped off by the brush 18. After confirming that, it is necessary to start the operation.

  The time required for the operation of the automatic filter cleaning mechanism 15 is preferably about 8 minutes or less from the start of operation ((1) in FIG. 6) to the end of operation ((4) in FIG. 6). This is because the function of the air conditioner is stopped during the automatic filter cleaning, in order to minimize the change in the room temperature due to the stop of the air conditioning function.

  During the operation of the automatic filter cleaning unit 15, the air conditioner fan 9 may be operated with a slight wind so that the dust 99 attached to the dust collection filter 14 due to vibration during driving of the filter does not fall on the grill 3. good.

  In FIG. 6, the brush 18, the dust box 20 and the like are arranged on the right side, but may be arranged on the left side. When arranged on the left side, the driving directions of the rotating roller 16, the brush 18, and the dust collecting filter 14 may be all opposite to those described above.

  According to the present embodiment, by providing the opening 14c in a part of the dust collection filter 14, there is an effect of reducing the pressure loss of the air passing through the dust collection filter 14 during the operation of the air conditioner. Further, by providing the elastic rod-like body 14d in the opening 14c, there is an effect that the dust 99 attached to the brush 18 can be removed in a form that suppresses an increase in the air path pressure loss. Then, the brush 18 removes the dust 99 adhering to the dust collecting filter 14, and the elastic rod-like body 14d removes the dust 99 adhering to the brush 18, so that an automatic filter that does not bother humans during filter cleaning is obtained. There is an effect that a cleaning device can be obtained.

  Further, since the dust collection filter 14 and the brush 18 rotate in the same direction, both movable directions on the contact surface between the dust collection filter 14 and the brush 18 are opposite to each other, and the brush 18 collects with a stronger reaction force. Dust adhering to the dust filter 14 can be removed.

  Furthermore, since the U-turn filter must drive the dust collection filter 14 in a reciprocating manner, the stability at the time of driving the filter is not good. However, since the filter is a roll-end filter, it rotates only in one direction. Therefore, the filter can be driven stably during cleaning. Further, since the rotation roller 16 for driving the dust collection filter 14 needs to be rotated only in one direction and there is no need to rotate in the opposite direction, the motor used for driving the dust collection filter 14 need not be a stepping motor. There is also an effect that the cost of the motor can be reduced.

  Further, the dust box 20 is provided below the contact surface between the dust collection filter 14 and the brush 18 so as to receive the scraped deposit, so that the brush 18 removes the deposit on the dust collection filter 14 and is elastic. When the stick 14d scrapes off the adhering matter adhering to the brush 18, it can be received in the dust box 20 without dropping the adhering matter into the room. Further, by arranging the dust box 20 so as to be removable, it is possible to easily discard the lump of deposits accumulated in the dust box 20.

  Further, by installing the brush 18 and the dust box 20 at the end of the filter that has little influence on the air flow sucked from the indoor air suction port, it is possible to reduce the suction pressure loss during the operation of the ceiling-embedded air conditioner 1. .

  Further, by providing the filter support belts 17 at both ends of the filter frame portion 14a and driving the dust collection filter 14, the drive of the dust collection filter 14 can be further stabilized.

  Further, by automatically cleaning the filter by the control unit, it is possible to eliminate clogging of the dust collection filter 14 to prevent an increase in pressure loss and to eliminate maintenance during filter cleaning.

  In the present embodiment, since the ceiling-embedded air conditioner 1 is described as an example, the dust collection filter 14 is installed horizontally, but the present invention is not limited to this. For example, even if the dust collection filter 14 is installed vertically, the same effect can be obtained.

Embodiment 2. FIG.
In the present embodiment, in addition to the configuration of the first embodiment, a configuration for raising and lowering the grill 3 and the dust box 20 is provided. FIG. 7 is a longitudinal sectional view of the air conditioner according to Embodiment 2. As shown in FIG. 7, a lifting device 24 is provided above the casement 6, and the grill 3 and the dust box 20 are lifted and lowered by the lifting device 24. As an installation method of the lifting device 24, it may be installed by an arbitrary installation method. For example, a columnar member may be installed horizontally on the casement 6 and the lifting device 24 may be installed thereon.

  Inside the elevating device 24, there is a string winding mechanism (not shown), and the string 25 can be fed and wound. The string 25 is guided by the string guide shaft 26 and attached to the peripheral edge of the grill 3. The string guide shaft 26 can be composed of a rod-shaped member provided in the casement 6. Further, the string guide shaft 26 is preferably configured to be rotatable in order to reduce friction with the string 25. It should be noted that it is preferable that the string 25 is attached to the grill 3 at least three places in order to stably lower the grill 3. This can be realized, for example, by branching the end of the string 25 on the grill 3 side and attaching it to the grill 3 or by connecting another string attached to the grill 3 to the string 25.

  FIG. 8 is a longitudinal sectional view of the vicinity of the dust box 20 according to the second embodiment. As shown in FIG. 8, the dust box 20 includes an upper dust box 27 fixed to the casement 6 and a lower dust box 28 attached to the grill 3. It has a structure.

  Thus, by fixing the lower dust box 28 to the grill 3 side and fixing the upper dust box 27 to the casement 6, the dust box 20 can be opened and closed as the grill 3 moves up and down. Since the brush 18 is fixed in the upper dust box 27, the positional relationship between the dust collection filter 14, the brush 18 and other cleaning parts and the dust box will not be displaced each time the dust box is raised or lowered.

  During the operation of the lifting device, the string 25 is fed from the lifting device 24, and the grill 3 and the dust box 20 can be lowered to the hand. Then, the dust 99 collected in the lower dust box 28 is discarded in a state where the lower dust box 28 is in the lowered position. After the work on the lower dust box 28, the string 25 is wound up by the lifting device 24, and the grill 3 and the dust box 20 can be raised and returned to their normal positions.

  According to the present embodiment, the lifting device 24 is provided above the casement 6, and the grill 3 and the dust box 20 are lifted and lowered by the lifting device 24. Therefore, by lifting and lowering the dust box 20 together with the grill 3, Maintenance work of the dust box 20 generated after filter cleaning can be easily performed. Moreover, the danger of working at heights can be avoided.

  In addition, the dust box is divided into two parts vertically, the lower dust box 28 is fixed to the grill 3 side, and the upper dust box 27 is fixed to the casement 6, so that the dust box 20 can be opened and closed as the grill 3 is raised and lowered. It becomes.

  The present invention is not limited to an air conditioner and can be widely used for devices that need to remove dust 99 attached to a filter provided in an air passage.

DESCRIPTION OF SYMBOLS 1 Ceiling embedded type air conditioner 2 Decorative panel 3 Grill 4 Outlet 5 Vane 6 Casement 7 Unit housing 8 Fan motor 9 Fan 10 Bell mouth 11 Heat exchanger 12 Drain pan 13 Main body outlet 14 Dust collection filter 14a Frame 14b Filter body 14c Opening 14d Elastic bar 15 Filter automatic cleaning mechanism 16 Rotating roller 17 Filter support belt,
18 Brush 19 Gear box 20 Dust box 21 Dust box stopper 22 Dust box fixing hole 23 Filter detection sensor 24 Lifting device 25 String 26 String guide shaft 27 Upper dust box 28 Lower dust box 99 Dust

Claims (12)

A dust collection filter that is disposed in the air flow path and collects dust in the air flowing through the air flow path;
A dust removing body for removing dust collected in the dust collecting filter,
The dust collection filter has a belt shape wound around a pair of rotating rollers, and an opening is formed on a surface located on the downstream side of the air flow path of the dust collection filter,
An automatic filter cleaning device in which an elastic bar-like body is disposed in the opening, and the elastic bar-like body removes dust adhering to the dust removing body. 2. The automatic filter cleaning device according to claim 1, wherein the opening has a width that is substantially the same as a width of the dust collection filter and a length that is substantially the same as a distance between the pair of rotating rollers. The automatic filter cleaning device according to claim 1, wherein the elastic rod-shaped body is formed of a wire-like member having elasticity. The automatic filter cleaning device according to any one of claims 1 to 3, wherein the dust removing body is provided outside the pair of rotating rollers. The automatic filter cleaning device according to any one of claims 1 to 4, wherein the dust removing body is a cylindrical brush. The automatic filter cleaning device according to claim 5, wherein the dust remover rotates in the same direction as the rotating roller. The automatic filter cleaning apparatus according to claim 1, wherein the rotating roller rotates in only one direction. The automatic filter cleaning device according to any one of claims 1 to 7, further comprising a dust box below a contact portion between the dust collection filter and the dust remover. The automatic filter cleaning device according to any one of claims 1 to 8, wherein filter support belts are provided at both ends of the dust collection filter. The air conditioner by which the automatic filter cleaning apparatus in any one of Claims 1 thru | or 9 is arrange | positioned in the air path between an air inlet and a fan. The pair of rotating rollers installed in the same horizontal plane;
A grill provided below the dust collection filter;
The dust box installed on the grill;
An elevating device that is provided above the dust collecting filter and raises and lowers the grill;
The air conditioner according to claim 10, comprising: The lifting device includes a string winding mechanism for feeding and winding the string,
The air conditioner according to claim 11, wherein the string is connected to a peripheral portion of the grill.

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