JP2010043786A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner reducing load in moving a dust box up and down, and easily disposing of dust in the dust box. <P>SOLUTION: This ceiling-recessed air conditioner 100 including a body unit 1 having a heat exchanger 11 and an air blower 9, and a decorative panel 21 having a suction opening 26, further includes a rolled filter 40 wound into the rolled shape at one side in the suction opening 26, and supplied between a suction opening and the air blower to collect dust of the sucked air from the suction opening, a first take-up motor 45 and a second take-up motor 46 for supplying or taking up the rolled filter 40, a brush 51 kept into contact with the rolled filter 40 and removing dust, the dust box 57 for accumulating the dust removed by the brush 51, and a suction grille 30 and an elevating unit 35 for supporting the dust box 57 while being moved up and down to the rolled filter 40 and the brush 51. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an air conditioner provided with a filter that collects dust of suction air.

Conventionally, in order to facilitate maintenance of a filter that removes dust in the intake air in an air conditioner, there has been proposed one provided with a dust removing unit that removes dust from the filter (see, for example, Patent Document 1). The dust removing unit includes a rotating brush for removing dust attached to the filter, a dust box for collecting the dust removed by the rotating brush, a guide rail and a drive motor for moving the dust box and the rotating brush along the air filter. Are provided on the suction grille.
JP 2007-40689 A

However, in the conventional configuration, since an air filter, a rotating brush, a dust box, a guide rail, a drive motor, and the like are arranged on the suction grill, the load on the mechanism including the lifting motor that lifts and lowers the suction grill is large and heavy. There was a problem that the ability to move up and down stably was required.
Therefore, the present invention provides an air conditioner that solves the problems of the conventional technology described above, reduces the load when the dust box is raised and lowered, and can easily dispose of dust in the dust box. With the goal.

  In order to solve the above-described problems, the present invention provides an air conditioner including a main body unit having a heat exchanger and a blower, and a decorative panel that is disposed below the main body unit and has a suction port for sucking air in a conditioned room. A roll filter that is wound in a roll shape on one side of the suction port and that is drawn out between the suction port and the blower to collect dust from the suction air from the suction port, and the roll filter Removing means for removing the dust from the roll filter in contact with the surface of the roll filter, and dust removed from the roll filter by the removing means from the removing means. A dust box that is transferred and integrated, and further, the dust box is raised with respect to the roll filter and the removing means. Characterized by comprising a lifting means for movably supported.

  According to this configuration, the dust attached to the surface of the roll filter can be easily removed and removed by the removing means that comes into contact with the surface of the roll filter by feeding or winding the roll filter by the winding means. The dust in the dust box can be easily removed by raising and lowering the dust box in which the accumulated dust is accumulated. Accordingly, it is possible to provide an air conditioner in which the maintenance of the filter is easy and the load when raising and lowering the dust box is very light. Moreover, by removing dust from the roll filter that can be used without replacement over a long period of time, the replacement period of the roll filter can be further extended, and the labor involved in maintenance can be greatly reduced.

  In this configuration, the roll filter that collects dust from the suction air from the suction port is wound around one side or the other side in the suction port from between the suction port and the blower by the winding means. It is good also as a structure which removes dust with the said removal means, and after that, the said roll filter of the part from which dust was removed is let out between the said suction inlet and the said air blower again.

  In this case, after removing the dust by winding the roll filter with the winding means, the roll filter is again extended between the suction port and the blower and used as a filter for collecting the dust of the suction air. It can be used repeatedly by removing dust from the roll filter. Thereby, the exchange period of a roll filter can be extended significantly and the labor concerning a maintenance can be reduced.

  Further, in this configuration, a moving means that moves the removing means so as to come into contact with and separate from the surface of the roll filter is provided, and the removing means is brought into contact with the surface of the roll filter by the moving means, and the roll After removing the dust by the removing means by winding the filter on one side or the other side in the suction port by the winding means, and then separating the removing means from the surface of the roll filter by the moving means. It is good also as a structure which pays out again the said roll filter of the part which removed dust between the said suction inlet and the said air blower.

  In this case, the removing means is brought into contact with the surface of the roll filter to remove the dust by winding up the roll filter, and the removing means is separated from the surface of the roll filter and the roll filter is fed out again. The dust is efficiently removed from the surface of the roll filter. On the other hand, when the roll filter is simply wound or fed out, the removing means does not contact the roll filter. For this reason, the roll filter can be wound or fed out efficiently, and the durability of the removing means and the roll filter can be expected to be improved.

Further, in this configuration, the removing means may be a brush that comes into contact with the surface of the roll filter on which dust adheres, and a pressing plate may be provided at a position facing the brush across the roll filter. Good.
In this case, dust on the surface of the roll filter can be efficiently and reliably removed by bringing the brush into contact with the roll filter and providing a pressing plate facing the brush.

In this configuration, a filter chamber may be provided between the main unit and the decorative panel, and the roll filter, the winding unit, and the removing unit may be provided in the filter chamber.
In this case, since the roll filter, the winding unit, and the removing unit are provided in the filter chamber, the load on the lifting unit can be reduced.

  According to the present invention, it is possible to significantly reduce the labor involved in maintenance by using a roll filter and lengthening the replacement period of the roll filter, and the load when raising and lowering the dust box can be very light. An air conditioner can be realized.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a ceiling-embedded air conditioner 100 according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the ceiling-embedded air conditioner 100. FIG. 3 is a cross-sectional view of the ceiling-embedded air conditioner 100.
The ceiling-embedded air conditioner 100 includes a sheet metal main unit 1 formed in a box shape, and the main unit 1, the filter chamber 20, and the decorative panel 21 are stacked in three stages. ing.
A plurality of suspension fittings 1B are provided on the outer surface of the main unit 1, and suspension bolts 2 fixed to the ceiling are fixed to the respective suspension fittings 1B by nuts 4 via these suspension bolts 2. The ceiling-embedded air conditioner 100 is suspended and installed in the ceiling space.

As shown in FIG. 3, inside the main body unit 1, a heat insulating material 3 made of foamed polystyrene is disposed almost entirely on the inner side of the side plate 1 </ b> A and the top surface, and inside the heat insulating material 3, a blower 9, and A heat exchanger 11 is accommodated.
The blower 9 includes a motor 5 having a shaft disposed downward, and a turbo fan 7 attached to the shaft of the motor 5. The heat exchanger 11 is a plate fin type heat exchanger formed in a pentagonal shape in a top view, and is disposed so as to surround the blower 9.

Below the heat exchanger 11, a drain pan 13 made of a synthetic resin such as styrene resin is disposed so as to cover the lower surface 11 </ b> A of the heat exchanger 11, and a drain pump (not shown) that discharges the drain accumulated in the drain pan 13 to the outside. Abbreviation) is provided.
The drain pan 13 is disposed so as to be in contact with the inner surface of the side plate 1A of the main unit 1, the suction opening 14 is opened at the center of the drain pan 13, and the exhaust of the blower 9 passing through the heat exchanger 11 is passed through the peripheral portion. A blowout opening 15 is formed. A nozzle 17 that guides the air in the conditioned room that has passed through the suction opening 14 to the blower 9 is attached to the upper part of the suction opening 14. The drain pan 13 is screwed with various components such as an electrical box (not shown) that houses a control circuit, a power supply circuit, and the like of the ceiling-embedded air conditioner 100.

The filter chamber 20 is disposed directly below the drain pan 13, and the filter chamber 20 is formed with a ventilation hole 25 communicating with the blowout opening 15 of the drain pan 13 and a suction opening 26 communicating with the suction opening 14. ing.
A decorative panel 21 is attached to the lower surface of the filter chamber 20, and the decorative panel 21 is substantially flush with the ceiling board 10 as shown in FIG.
The decorative panel 21 is formed with a suction port 22 for sucking in air in the conditioned room and a blow-out port 23 for blowing out conditioned air that has passed through the heat exchanger 11 to the conditioned room, and the suction port 22 serves as a suction port for the filter chamber 20. The air outlet 23 communicates with the opening 26 and is formed in a position and a shape communicating with the vent hole 25 of the filter chamber 20.
Further, as shown in FIG. 1, an indicator 21 </ b> A is arranged at the bottom corner of the decorative panel 21. The indicator 21A includes a plurality of LEDs, and displays the operation state of the ceiling-embedded air conditioner 100 according to the lighting states (lighting, extinguishing, and blinking) of these LEDs, and various notifications.

  The decorative panel 21 is fitted with a suction grill 30 that fits into the suction port 22 and a lifting unit 35 that supports the suction grill 30 by four hanging straps 36, 37, 38, 39. Yes. A suction port 31 for sucking room air is formed in the center of the suction grill 30, and the suction port 31 communicates with the suction opening 26 in a state where the suction grill 30 is fitted to the suction port 22.

The lifting / lowering unit 35 is attached to the inside of the decorative panel 21, that is, the surface on the filter chamber 20 side through a sheet metal stay (not shown), and the four hanging straps 36 to 39 are fed or unwound. The suction grill 30 is raised and lowered within a predetermined range. The elevating unit 35 functions as an elevating means together with the suction grill 30.
The suction grill 30 has two hanging straps 36 and 37 fixed to one side thereof, and two hanging straps 38 and 39 fixed to the other side thereof. The lifting / lowering unit 35 is a housing in which a lifting / lowering mechanism (not shown) for feeding and unwinding the hanging straps 36 to 39 and a control board (not shown) for controlling the lifting / lowering mechanism are housed in one casing.

One end of each of the hanging straps 36 to 39 is fixed to the back surface of the suction grill 30, that is, the upper surface in the figure, and the other end is horizontally turned by a guide provided on the back surface of the decorative panel 21. 35.
The lifting mechanism includes a bobbin (not shown) around which the hanging straps 36 to 39 are wound, a gear (not shown) for rotating the bobbin, and a grill lifting motor 37 (FIG. 6). The bobbin is rotated in the forward direction or the reverse direction by rolling or reversing operation, and the hanging straps 36 to 39 are fed out or rewound.
Each bobbin around which the hanging straps 36 to 39 are wound has a diameter and a diameter so that each of the hanging straps 36 to 39 is uniformly fed out or rewound in order to raise and lower the suction grill 30 as much as possible. The amount of rotation is set. Each bobbin may be supported by an independent shaft, or a plurality of bobbins may be supported coaxially and rotated simultaneously.

  The ceiling-embedded air conditioner 100 configured as described above allows a refrigerant supplied from an outdoor unit (not shown) to pass through the heat exchanger 11, and causes the heat exchanger 11 to function as an evaporator or a condenser. Cool or heat the room air in the conditioned room. That is, the ceiling-embedded air conditioner 100 sucks room air from the suction port 31 of the suction grill 30 by the operation of the blower 9, and this room air is sucked into the suction port 22 of the decorative panel 21, the suction opening 26 of the filter chamber 20, It is sucked up through the suction opening 14 and the nozzle 17 of the main unit 1. This indoor air is sent to the heat exchanger 11 by the blower 9 and is cooled or heated when passing through the heat exchanger 11 to become conditioned air. The conditioned air flows downward from the blowout opening 15 of the main unit 1 through the ventilation hole 25 of the filter chamber 20 and is blown out from the blowout port 23 of the decorative panel 21 to the conditioned room. Heat up.

  A roll filter 40 is disposed in the suction opening 26 of the filter chamber 20. The roll filter 40 is a filter that collects dust floating in the suction air when passing through the air in the conditioned room sucked from the suction port 31 by the blower 9, and the suction port 31 side into which the room air enters. This surface is a collecting surface 40A to which dust adheres.

One end of the roll filter 40 is wound around a first roll 41 disposed on one end side of the suction opening 26, and the other end is wound on a second roll 42 disposed on the other end side of the suction opening 26. ing. The roll filter 40 is bridged between guide rollers 47 and 48 disposed at the end of the suction opening 26 between the first roll 41 and the second roll 42. The guide rollers 47 and 48 are respectively disposed at positions very close to the end of the suction opening 26, and the roll filter 40 stretched between the guide rollers 47 and 48 covers almost the entire surface of the suction opening 26, Suction air is passed between the guide rollers 47 and 48.
The first roll 41, the second roll 42, and the guide rollers 47 and 48 are all attached to the inner wall surface of the suction opening 26 so as to be rotatable directly or via a stay or the like.

  A roll filter 40 before use is wound around the first roll 41, and the roll filter 40 is sequentially fed out and used as a filter. Since a portion of the roll filter 40 located between the guide rollers 47 and 48 functions as a filter that allows the intake air to pass therethrough, the length corresponding to the distance between the guide rollers 47 and 48 is defined as one time. A roll filter 40 having a length that is several times to several tens of times, for example, is wound around the first roll 41 that is sufficiently longer than the amount used for one time. For this reason, when dust adheres to the collection surface 40A during the operation of the ceiling-embedded air conditioner 100, the roll filter 40 of one length is wound around the second roll 42, which corresponds to the amount taken up. By extending the length to be fed from the first roll 41, all the filters covering the suction openings 26 can be replaced with new ones. According to this operation, just by rotating the first roll 41 and the second roll 42, the dust collecting ability is restored, the ventilation resistance is reduced, etc., as in the case where the old filter is replaced with a new filter. The effect is obtained.

  A gear 41 </ b> A is attached to the shaft of the first roll 41, and a transmission gear 43 is engaged with the gear 41 </ b> A. . On the other hand, a gear 42 </ b> A is attached to the shaft of the second roll 42, and this gear 42 </ b> A meshes with the transmission gear 44. Yes. For this reason, the 1st roll 41 rotates by rotation operation of the 1st winding motor 45 (winding means), and the 2nd roll 42 rotates by rotation operation of the 2nd winding motor 46 (winding means).

  In the present embodiment, the direction in which the roll filter 40 is sent from the first roll 41 toward the second roll 42 (reference numeral A in FIG. 3) is the forward direction, and the direction in which the roll filter 40 is sent from the second roll 42 toward the first roll 41 (see FIG. The middle code B) is the reverse direction. When the roll filter 40 is fed in the forward direction, the second roll 42 is rotated by the second winding motor 46, and the roll filter 40 is wound around the second roll 42. On the other hand, when the roll filter 40 is fed in the reverse direction, the first roll 41 is rotated by the first winding motor 45, and the roll filter 40 is wound around the first roll 41.

A brush 51 and a pressing plate 53 are disposed between the guide rollers 47 and 48 at a position close to the guide roller 47 side. The brush 51 is a brush that is implanted on one surface side and scrapes off dust adhering to the collecting surface 40A in a state where the flocked surface is in contact with the collecting surface 40A of the roll filter 40. The pressing plate 53 is a plate-like member that is located at a position facing the brush 51 with the roll filter 40 interposed therebetween, and that sandwiches the roll filter 40 together with the brush 51.
The brush 51 and the pressing plate 53 are both rod-shaped members extending in the width direction of the roll filter 40, and both ends thereof are supported by the wall surface of the suction opening 26. The brush 51 and the pressing plate 53 can be moved in a direction approaching the roll filter 40 and a direction away from the roll filter 40 by a moving unit 50 described later.

4 is an enlarged view showing a main part configuration of the ceiling-embedded air conditioner 100, and FIG. 4A is a main part enlarged side view showing a configuration of a moving unit 50 that moves the brush 51 and the pressing plate 53. FIG. 4B is a cross-sectional view of the main part showing the attached state of the dust box 57.
As shown in FIG. 4A, the moving unit 50 (moving means) includes a brush lifting / lowering gear 61 disposed at a substantially intermediate position between the brush 51 and the pressing plate 53, and a drive attached to the rotating shaft of the brush lifting / lowering motor 64. A gear 63 and a transmission gear 62 that transmits the rotational force of the drive gear 63 to the brush elevating gear 61 are provided. The brush elevating gear 61, the transmission gear 62, and the drive gear 63 are rotatably supported on the wall surface of the filter chamber 20 that forms the suction opening 26.

  A brush support shaft 52 projects from the end of the brush 51, and a presser plate support shaft 54 projects from the end of the presser plate 53. The brush support shaft 52 and the pressing plate support shaft 54 are sandwiched from the side by two guide frames 55 fixed to the wall surface of the filter chamber 20, and can be slid up and down along the guide frames 55. It has become.

A rack 56 that protrudes toward the presser plate 53 is attached to the brush support shaft 52, and a rack 58 that protrudes toward the brush 51 is attached to the presser plate support shaft 54. These racks 56 and 58 are brushes. The lift gear 61 is engaged with the lift gear 61. For this reason, the racks 56 and 58 are moved up and down by the rotation of the brush elevating gear 61, and the brush 51 and the pressing plate 53 are simultaneously raised or lowered.
In the configuration shown in FIG. 4A, when the brush elevating gear 61 rotates counterclockwise as indicated by reference numeral D1, the rack 56 rises and the rack 58 falls. For this reason, the brush 51 and the pressing plate 53 are moved in the direction indicated by the arrow D3 in the drawing so as to approach each other, and the roll filter 40 is sandwiched therebetween.
On the other hand, when the brush raising / lowering gear 61 rotates clockwise as indicated by a symbol D2 in the drawing, the rack 56 is lowered while the rack 58 is raised. For this reason, the brush 51 and the pressing plate 53 move in the direction indicated by the arrow D4 in the figure so as to be separated from each other, and are separated from the roll filter 40.

In this way, the moving unit 50 moves the brush 51 and the pressing plate 53 so as to approach, contact, or separate from the roll filter 40 by the operation of the brush lifting / lowering motor 64. For this reason, when it is necessary to scrape off the dust on the collection surface 40A, the brush 51 and the pressing plate 53 are brought into contact with the roll filter 40. In other cases, the brush 51 and the pressing plate 53 are brought into contact with the roll filter 40. Can be kept away from
When the brush 51 and the pressing plate 53 are moved to the roll filter 40 side by the moving unit 50, the brush 51 contacts the collecting surface 40A and the pressing plate 53 contacts the back side of the roll filter 40. That is, since the roll filter 40 is sandwiched between the brush 51 and the pressing plate 53, the brush 51 can reliably contact the collecting surface 40A, and dust on the collecting surface 40A can be reliably scraped off. Dust strongly adhered to the surface can also be removed.

A dust box 57 that collects dust scraped off from the collection surface 40 </ b> A by the brush 51 is disposed below the brush 51. The dust box 57 is an open top and receives and accumulates dust falling from the end of the brush 51.
As shown in FIG. 4B, the dust box 57 is supported by being sandwiched between two ribs 33 erected on the upper surface of the suction grill 30. A boss 59 is provided on the side surface of the dust box 57, and a receiving hole 34 into which the boss 59 is fitted is formed in the rib 33. The boss 59 fits into the receiving hole 34 so that the dust box 57 does not fall off. It is supported.
When dust accumulates in the dust box 57, the dust box 57 can be removed from the suction grill 30 and the dust in the dust box 57 can be discarded. In this case, the dust box 57 is removed by pressing both ends of the upper opening of the dust box 57 in a direction away from the rib 33 as shown by arrows in FIG. Can do.

Further, since the dust box 57 is supported by the suction grill 30, when the suction grill 30 is lowered by the operation of the elevating unit 35, the dust box 57 is lowered together with the suction grill 30.
FIG. 5 is a cross-sectional view showing a state where the suction grill 30 is lowered in the ceiling-embedded air conditioner 100.
As shown in FIG. 5, the suction grill 30 is suspended by the four hanging straps 36 to 39 fed out from the lifting unit 35, and descends directly below the decorative panel 21. At this time, the dust box 57 held by the ribs 33, 33 on the rear surface, that is, the upper surface of the suction grill 30 is lowered together with the suction grill 30. Therefore, when dust accumulates in the dust box 57, the suction grill 30 is lowered, the dust box 57 is removed as described above, the dust is discarded, and the dust box 57 is washed as necessary.
Further, since the suction grill 30 is not mounted with each part including the roll filter 40 and only the dust box 57 is attached, the weight load applied to the lifting unit 35 when the suction grill 30 is raised and lowered can be reduced. There is.

FIG. 6 is a functional block diagram showing the configuration of the control circuit 70 related to driving of the roll filter 40.
The control circuit 70 is configured by connecting a nonvolatile memory 72, a motor driver 73, a sensor control circuit 74, and a communication unit 78 to a control circuit 70 that centrally controls each unit.
The microcomputer 71 incorporates a memory (not shown), and controls each part of the control circuit 70 by reading and executing a program stored in the memory.
The nonvolatile memory 72 is configured by an EEPROM or a flash memory, and stores setting values and the like necessary for controlling the motor driver 73 and the sensor control circuit 74 by the microcomputer 71.
The motor driver 73 is connected to each of the first winding motor 45, the second winding motor 46, the brush lifting / lowering motor 64, and the grill lifting / lowering motor 37 included in the ceiling-embedded air conditioner 100. The motor driver 73 supplies drive current to each of these motors according to the control of the microcomputer 71 to drive and control each motor. Here, when any of the first winding motor 45, the second winding motor 46, the brush lifting / lowering motor 64, and the grill lifting / lowering motor 37 is configured by a stepping motor, the motor driver 73 is driven with respect to the motor. A pulse is output to operate the motor by the required amount.

The sensor control circuit 74 is connected to each of the winding position sensor 66, the grill position sensor 67, and the dust box sensor 68. The winding position sensor 66 is a sensor that detects a winding amount of the roll filter 40 in one or both of the first roll 41 and the second roll 42. Based on the detection value of the winding position sensor 66, the amount of the roll filter 40 wound around each of the first roll 41 and the second roll 42 can be obtained. Specifically, the winding position sensor 66 can be realized by using a rotary encoder that detects the rotation amounts of the first roll 41 and the second roll 42.
The grill position sensor 67 is a sensor that detects the position of the suction grill 30 when the grill lifting motor 37 is raised or lowered by the lifting unit 35. Specifically, the grill position sensor 67 can be realized by using a rotary encoder that detects the amount of rotation of the bobbin that winds the hanging straps 36 to 39.

The dust box sensor 68 is a sensor that detects that dust accumulated in the dust box 57 has reached a predetermined amount. Based on the detection value of the dust box sensor 68, it is determined whether or not the dust in the dust box 57 needs to be discarded. Can be determined. For example, when the dust box 57 is formed of a transparent box, the dust box sensor 68 is a sensor that detects the amount of dust by transmitting light through the dust box 57 and detecting the amount of transmitted light, or the upper end of the dust box 57. This can be realized by a sensor that optically detects the presence or absence of dust in the vicinity, a sensor that detects the weight of the dust box 57, or the like.
The sensor control circuit 74 samples the detection values in each of the winding position sensor 66, the grill position sensor 67, and the dust box sensor 68 at a predetermined cycle, and outputs digital data indicating the detection value to the microcomputer 71.

Further, the microcomputer 71 can perform wireless communication with the remote controller 80 that operates the ceiling-embedded air conditioner 100 by the communication unit 78.
The remote controller 80 includes a plurality of operators and a liquid crystal display device that displays the contents set by the operations of the operators, and wirelessly transmits an operation signal to the communication unit 78 in accordance with the operations of the operators. The communication unit 78 receives an operation signal transmitted from the remote controller 80 and outputs it to the microcomputer 71. For example, when instructed to lower the suction grill 30 by an operator provided in the remote controller 80, the microcomputer 71 causes the motor driver 73 to rotate the grill lifting motor 37 forward in response to an operation signal indicating this operation. The suction grill 30 is lowered. Here, the microcomputer 71 acquires the detection value of the grill position sensor 67 via the sensor control circuit 74, and stops the grill lifting motor 37 when the suction grill 30 is lowered to a predetermined position. Thereafter, when an instruction to raise the suction grill 30 is input by the remote controller 80, the microcomputer 71 reversely operates the grill elevating motor 37 by the motor driver 73 in response to the operation signal of this instruction operation. Raise.

The microcomputer 71 controls the motor driver 73 based on data input from the sensor control circuit 74 to operate each motor, thereby executing a winding operation of the roll filter 40, a cleaning operation of the roll filter 40, and the like. .
Further, when the microcomputer 71 determines that it is necessary to throw away the dust in the dust box 57 based on the data input from the sensor control circuit 74, the indicator 71A is turned on or blinked in a predetermined state. Notify that it is necessary to throw away the trash.

FIG. 7 is a flowchart showing the operation of the ceiling-embedded air conditioner 100, and particularly shows the operation related to the driving of the roll filter 40.
The operation shown in FIG. 7 is executed each time the air conditioning operation time of the ceiling-embedded air conditioner 100 reaches a predetermined time set in advance.

The microcomputer 71 of the control circuit 70 controls the motor driver 73 to clean the roll filter 40 every time the cumulative operation time of the air conditioning operation of the ceiling-embedded air conditioner 100 reaches a predetermined time. 64 is operated, and the brush 51 and the pressing plate 53 are moved so that the brush 51 contacts the collecting surface 40A of the roll filter 40 (step S11).
Next, the microcomputer 71 operates the first winding motor 45 to wind the roll filter 40 around the first roll 41, thereby moving the roll filter 40 in the reverse direction (the direction of arrow B in FIG. 3) ( Step S12).
As a result of this winding operation, the portion of the roll filter 40 that collects the dust of the suction air from the suction port 31 is sent to the first roll 41 side, and the dust on the roll filter 40 is scraped off by the brush 51 in the middle thereof. It is.

  During the operation of winding the roll filter 40 around the first roll 41, the microcomputer 71 monitors the detection value of the winding position sensor 66 (step S13) and winds up the roll filter 40 by a length corresponding to one time. (Step S13; Yes), the motor driver 73 is controlled to stop the first winding motor 45 (Step S14), and the brush lifting motor 64 is operated to move the brush 51 away from the collection surface 40A (Step S15). ). Thereby, the movement of the roll filter 40 is stopped, and the brush 51 is separated from the collection surface 40A.

Here, the microcomputer 71 determines whether or not the portion of the roll filter 40 wound around the first roll 41 can be reused (step S17). The roll filter 40 can use the same part as a filter a plurality of times by scraping off dust with the brush 51, and the upper limit of the number of times of use is set in advance. The microcomputer 71 compares the cumulative use count of the roll filter 40 for one time taken up in steps S12 to S13 with the usable upper limit, and determines whether the roll filter 40 for one time can be reused. .
And when reusable, the amount of winding is set to the length equivalent to 1 time (step S16), and when the wound part cannot be reused, it is set as 2 times (2 for 1 time). Is set (step S18).
When the winding amount is set to one time, the roll filter 40 for one time is fed out from the first roll 41 and is arranged on the downstream side of the suction port 31. In this case, the portion where dust is written off by the brush 51 is used again as a filter. On the other hand, when the winding amount is set to two times, the roll filter 40 for two times is fed from the first roll 41. That is, the portion where the dust is previously written by the brush 51 is wound around the second roll 42, and the unused portion following this portion is disposed on the downstream side of the suction port 31 and used as a filter. That is, when the winding amount is set to two times, it is equivalent to replacing the part used as a filter with an unused product.

The microcomputer 71 controls the motor driver 73 to operate the second winding motor 46, thereby winding the roll filter 40 around the second roll 42 and moving it in the forward direction (the direction of arrow A in FIG. 3) ( Step S19). During the winding operation, the microcomputer 71 monitors the detection value of the winding position sensor 66 (step S20), and continues the winding operation until the roll filter 40 having the set winding amount is wound.
When winding of the set winding amount is completed (step S20; Yes), the microcomputer 71 controls the motor driver 73 to stop the second winding motor 46 (step S21), and the sensor control circuit 74 Based on the detected value of the dust box sensor 68, it is determined whether or not the dust in the dust box 57 is full (step S22). Here, if the dust box 57 is full (step S22; Yes), the microcomputer 71 performs notification by the indicator 21A (step S23), and ends this process. If it is determined from the detection value of the dust box sensor 68 that the dust box 57 is not full (step S22; No), the microcomputer 71 ends this processing as it is.

  As described above, according to the ceiling-embedded air conditioner 100 according to the embodiment to which the present invention is applied, the roll filter 40 is fed or wound by the first winding motor 45 and the second winding motor 46. The dust adhered to the surface of the roll filter 40 can be easily removed by the brush 51 in contact with the surface of the roll filter 40, and the dust box 57 in which the removed dust is collected is moved up and down to move the dust inside the dust box 57. Dust can be easily discarded. Thereby, the maintenance of the roll filter 40 is easy, and the ceiling-embedded air conditioner 100 in which the load when raising and lowering the dust box 57 is very light can be realized. Moreover, by removing the dust adhering to the roll filter 40, the replacement cycle of the roll filter 40 that can be used without replacement over a long period of time can be further increased, and the labor involved in maintenance can be greatly reduced.

  In addition, dust is removed by the brush 51 while winding up the roll filter 40 that has collected the dust of the suction air, and then the portion of the roll filter 40 from which the dust has been removed is again fed between the suction port 31 and the blower 9. . For this reason, the dust of the roll filter 40 can be removed and used repeatedly. Thereby, the exchange period of the roll filter 40 can be extended significantly and the labor concerning maintenance can be reduced.

  Moreover, the moving unit 50 which moves the brush 51 to the surface of the roll filter 40 so that contact / separation is possible is carried out, the brush 51 is made to contact | abut to the surface of the roll filter 40, dust is removed, Separated from the surface, the part of the roll filter 40 from which dust has been removed is fed out again between the suction port 31 and the blower 9. Thereby, dust can be efficiently removed from the surface of the roll filter 40 using the power of the first winding motor 45 and the second winding motor 46. On the other hand, when the roll filter 40 is simply wound or fed out, the brush 51 does not come into contact with the roll filter 40, so that the roll filter 40 can be wound or fed out efficiently. Furthermore, by eliminating unnecessary contact between the brush 51 and the roll filter 40, it is possible to expect improvement in durability of the brush 51 and the roll filter 40.

Further, since the roll filter 40 includes the brush 51 that contacts the collecting surface 40A to which dust adheres and the pressing plate 53 that faces the brush 51 with the roll filter 40 interposed therebetween, the collecting surface 40A of the roll filter 40 is provided. Can be removed efficiently and reliably.
In addition, the filter chamber 20 is provided with a roll filter 40, a first winding motor 45 and a second winding motor 46, and a brush 51, and only the dust box 57 is supported on the suction grill 30. And the load of the lifting unit 35 can be lightened.

  The ceiling-embedded air conditioner 100 controls the first winding motor 45, the second winding motor 46, and the brush lifting / lowering motor 64 via the motor driver 73 by the microcomputer 71 provided in the control circuit 70. The detection values of the winding position sensor 66 and the dust box sensor 68 are acquired via the sensor control circuit 74, and the roll filter 40 is wound and the brush 51 and the holding plate 53 are moved. Therefore, efficient control is performed. , Make each part operate quickly. Then, the microcomputer 71 causes the moving unit 50 to bring the brush 51 into contact with the collecting surface 40A, drives the first winding motor 45 to wind up the roll filter 40, and removes the dust. Since the roll filter 40 is taken up by the second take-up motor 46 separated from the collection surface 40A, the same part of the roll filter 40 is used many times. The frequency can be greatly reduced. Until the time for replacing the roll filter 40 is reached, the user simply looks at the notification operation of the indicator 21A under the control of the microcomputer 71, moves the suction grill 30 down by operating the remote controller 80, and throws away the dust in the dust box 57. It is easy to use the air conditioner 100 with a built-in ceiling comfortably by performing simple maintenance with little effort and avoiding clogging of the roll filter 40 due to dust and a decrease in operating efficiency due to this. it can.

As mentioned above, although one Embodiment of this invention was described, this invention is not limited to this, A various change implementation is possible. For example, in the above-described embodiment, the dust box 57 has been described by taking as an example a configuration in which the dust box 57 is held by the rib 33 provided on the back surface of the suction grill 30. It may be fixed, or may be detachably fixed by a clip or the like. In addition, a guide for guiding dust scraped off from the collection surface 40 </ b> A by the brush 51 to the upper surface of the dust box 57 may be provided below the brush 51. Furthermore, the specific structure of the mechanism for raising and lowering the dust box 57 is also arbitrary. In addition to the structure for raising and lowering the entire suction grill 30 with the four hanging straps 36 to 39, only a part of the suction grill 30 is raised and lowered. In this case, the number of the hanging straps is arbitrary. The configuration for removing dust from the roll filter 40 is not limited to the brush 51, and a rotary brush can be used, and the configuration for rotating the first roll 41 and the second roll 42 is also used for the transmission gear 43. 44, the mechanism using the first winding motor 45 and the second winding motor 46, for example, the shafts of the first roll 41 and the second roll 42 may be directly driven by the motor, and the moving unit 50 The specific configuration of is also arbitrary.
Furthermore, the air conditioner to which the present invention is applied is not limited to the ceiling-embedded air conditioner 100 but can be applied to a ceiling-suspended air conditioner, and other specific modes can be arbitrarily changed. .

1 is a perspective view of a ceiling-embedded air conditioner according to an embodiment of the present invention. It is a disassembled perspective view of a ceiling embedded type air conditioner. It is sectional drawing in the normal operation state of a ceiling-embedded air conditioner. It is sectional drawing which shows the state which lowered | hung the grill in the ceiling-embedded air conditioner. It is an enlarged view which shows the principal part structure of a ceiling-embedded air conditioner, (A) is a principal part enlarged side view which shows the structure of a movement unit, (B) is principal part sectional drawing which shows the attachment state of a dust box. It is. It is a functional block diagram which shows the structure of the control circuit which concerns on the drive of a roll filter. It is a flowchart which shows the operation | movement which concerns on the drive of a roll filter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body unit 9 Blower 11 Heat exchanger 13 Drain pan 20 Filter chamber 21 Cosmetic panel 22 Suction port 26 Suction opening 30 Suction grill (lifting means)
31 Suction port 33 Rib 34 Receiving hole 35 Elevating unit (elevating means)
40 roll filter 40A collection surface 41 first roll 42 second roll 45 first winding motor (winding means)
46 Second winding motor (winding means)
47, 48 Guide roller 50 Moving unit (moving means)
51 Brush 53 Holding Plate 57 Dust Box 64 Brush Lifting Motor 70 Control Circuit 71 Microcomputer 100 Ceiling Embedded Air Conditioner

Claims (5)

In an air conditioner including a main body unit having a heat exchanger and a blower, and a decorative panel that is disposed below the main body unit and has a suction port for sucking air in a conditioned room,
A roll filter wound around in one side of the suction port and drawn out between the suction port and the blower to collect dust from the suction air from the suction port; A winding means for winding,
A removing unit that contacts the surface of the roll filter and removes dust from the roll filter; and a dust box in which the dust removed from the roll filter by the removing unit is transferred from the removing unit and accumulated. And a lifting means for supporting the dust box so as to be lifted and lowered relative to the roll filter and the removing means,
Air conditioner characterized by. The roll filter, which has collected dust from the intake air from the suction port, is wound by the removing means while being wound from one side of the suction port to the other or the other side between the suction port and the blower by the winding means. Removing the dust, and then feeding out the part of the roll filter from which the dust has been removed again between the suction port and the blower,
The air conditioner according to claim 1. A moving means for moving the removing means so as to come in contact with and separate from the surface of the roll filter;
The removing means is brought into contact with the surface of the roll filter by the moving means, and dust is removed by the removing means by winding the roll filter to one side or the other side in the suction port by the winding means. Then, the part of the roll filter from which the dust is removed after separating the removing unit from the surface of the roll filter by the moving unit is again fed between the suction port and the blower,
The air conditioner according to claim 2. The removing means is a brush that contacts the surface of the roll filter on which dust adheres, and has a pressing plate at a position facing the brush across the roll filter;
The air conditioner according to any one of claims 1 to 3. A filter chamber is provided between the main unit and the decorative panel, and the roll filter, the winding unit, and the removing unit are provided in the filter chamber.
The air conditioner according to any one of claims 1 to 4.

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