JP4887053B2 - Air conditioner indoor unit - Google Patents

Description

  The present invention relates to an indoor unit of an air conditioner having a cleaning function for automatically removing dust captured from room air by an air filter from the air filter.

In an indoor unit of an air conditioner, room air is sucked into the main body from the suction port, but dust contained in the room air is captured by an air filter provided facing the suction port, and only the room air is a heat exchanger. It is led to heat exchange. As the air conditioning operation continues, dust trapped in the air filter accumulates, and if left as it is, the flow of indoor air to the heat exchanger is hindered, leading to a decrease in heat exchange efficiency.
In order to improve heat exchange efficiency, it is ideally necessary to periodically remove dust adhering to the air filter. A front panel constituting the front surface of the main body is rotatably provided. When the front panel is opened, the air filter is exposed. The air filter can be easily removed from the main body by grasping and pulling down the lower end of the air filter. After removing the dust adhering to the air filter, it can be returned to its original position by pushing the air filter back into the main body.

However, an indoor unit of an air conditioner that is commonly used is called a so-called wall-mounted type, and is attached to a height of a wall surface of a room. For this reason, for example, it is difficult for elderly people and women to open and close the front panel and to attach and remove the filter, and the air filter is likely to remain dusty.
Thus, for example, [Patent Document 1] and [Patent Document 2] disclose an air conditioner including means for automatically removing dust adhering to an air filter. Specifically, an air filter is arranged from the front surface to the upper surface of the inverted V-shaped heat exchanger, and a dust removing portion for removing dust from the air filter is provided.
JP 2002-340395 A JP 2004-278923 A

According to the technique of the above-mentioned [Patent Document 1], dust adhering to the air filter is sucked by the suction fan disposed on the side surface of the main body by the dust suction part formed so as to be movable on the air filter, and the suction duct is formed. It is comprised so that it may accommodate in the garbage storage part provided in the suction fan vicinity. Further, according to the technique of [Patent Document 2], the air conditioner has a suction / exhaust device and an exhaust duct that exhausts air from the suction / exhaust device to the outside, and sucks dust adhering to the air filter with a suction nozzle. The suction exhaust device is configured to discharge the air from the exhaust duct to the outside of the room.
However, such cleaning of the air filter is performed at predetermined operation time intervals, and therefore, the joining state of the air filter and the air filter cleaning means is not always at the predetermined position, and a deviation may occur. For this reason, there is a possibility that the air filter cleaning means does not operate normally and the air filter is not cleaned or the operation is continued in a state where the air filter is not cleaned well.

  The present invention has been made on the basis of the above circumstances, and an object of the present invention is to always perform the air filter cleaning operation in a normal state, and to keep the air filter disposed in the indoor unit clean for a long period of time. It is an object of the present invention to provide an indoor unit for an air conditioner.

In order to satisfy the above object, the indoor unit of the air conditioner of the present invention, the indoor unit body accommodates a heat exchanger and a blower inside, and the suction port is provided on the upstream side of the heat exchanger of the indoor unit body,
The air filter divided into a plurality is arranged facing the suction port,
An air filter cleaning unit is disposed between the plurality of divided air filters, and is provided in opposition to the rotating brush and the rotating brush that are driven in conjunction with the movement of each air filter to remove dust adhering to each air filter. A dust box provided with a dust receiving passage for collecting the dust scraped by the rotary brush, and an opening for bringing the rotary brush into contact with the air filter, and the opening of the dust box can be freely opened and closed. A sealing member for closing,
An intake / exhaust device is provided on one side of the indoor unit body, and includes a fan that sucks dust collected in the dust receiving passage of the dust box and discharges it to the outside .
A check mode in which the air filter cleaning operation control means checks whether the air filter cleaning unit functions correctly at the start of the air filter cleaning operation. The air filter is guided to the air filter cleaning unit to remove dust adhering to the air filter. An air filter cleaning mode, and a dust discharge mode for operating the intake / exhaust device to discharge dust collected in the air filter cleaning unit to the outdoors.

  According to the present invention, the air filter automatic cleaning operation for automatically removing dust from the air filter is always performed in a normal state, so that the air filter automatic cleaning operation can be stably performed, and the reliability of the product is improved. As a result, it is possible to eliminate the trouble of cleaning the filter and to keep the filter clean.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic longitudinal sectional view and a configuration diagram relating to an indoor unit of an air conditioner. (Note that parts not marked in the description are not shown. The same applies hereinafter.)
The indoor unit body 1 is composed of a front panel 2 constituting a front case and a rear plate case 3 constituting a rear case, and has a horizontally long shape in the width direction with respect to the vertical direction. A front suction port 4 is opened at a part of the front side of the indoor unit body 1, and a movable panel 2 </ b> A supported by an opening / closing drive mechanism is fitted into the front panel 2 facing the front suction port 4.
When the operation is stopped, the movable panel 2A is joined to the surface of the front panel 2 to become the same surface and closes the front suction port 4. However, during operation, the movable panel 2A protrudes and displaces to the front, creating a gap communicating with the room. The front suction port 4 is controlled to be opened indoors. An upper surface suction port 5 is provided in the upper part of the indoor unit body 1. A frame-like crosspiece is fitted into the upper surface suction port 5 and is partitioned into a plurality of spaces by the crosspiece.

A blow-out opening 6 is opened at the lower front portion of the indoor unit body 1, and two blow-out louvers 7 a and 7 b are provided in parallel on the blow-out opening 6. The blowout louvers 7a and 7b can open and close the blowout opening 6 according to their respective rotation postures and set the blowout direction of the heat exchange air according to operating conditions.
Inside the indoor unit main body 1, an indoor heat exchanger 8 formed in a substantially inverted V shape by the front heat exchanger portion 8A and the rear heat exchanger portion 8B is disposed. The front heat exchanger section 8A is formed in a curved shape substantially parallel to the front panel 2 with a gap therebetween, and faces the front inlet 4 and the upper inlet 5. The rear heat exchanger portion 8B is formed in a straight shape and is opposed to the upper surface suction port 5 in an oblique manner.

An indoor fan 10 is disposed between the front and rear heat exchanger portions 8A and 8B of the indoor heat exchanger 8. The indoor blower 10 includes a fan motor disposed in a space on one side end of the indoor unit main body 1 and a cross-flow fan in which one support shaft is mechanically connected to the rotation shaft of the fan motor. The axial direction length of the cross flow fan is the same as the width direction dimension of the heat exchanger 8, and the cross flow fan is disposed correctly facing the heat exchanger 8.
The lower end portion of the front heat exchanger portion 8A is placed on the front drain pan 12a, and the lower end portion of the rear heat exchanger portion 8B is placed on the rear drain pan 12b. The front and rear drain pans 12a and 12b receive drain water dropped from the respective heat exchanger portions 8A and 8B, and can drain the water to the outside through a drain hose (not shown).

The outer surfaces of the side walls of the front and rear drain pans 12a and 12b are provided close to the indoor blower 10 and constitute a nose for the crossflow fan of the indoor blower 10. A partition wall member 14 connects the side wall portions of the front and rear drain pans 12a and 12b, which are noses, and the side portions of the outlet port 6. A space surrounded by the partition member 14 is a blowout ventilation path 15 that communicates the nose and the blowout opening 9.
On the other hand, a frame assembly 16 is interposed between the front panel 2 and the front side to the upper side of the indoor heat exchanger 8, and this frame assembly is attached to the front panel 2 via a fixture. A plurality of divided air filters are respectively disposed on the front surface portion and the upper surface portion of the frame assembly 16.
That is, a front air filter 17 that is divided into left and right parts is movably attached to the front part, and an air purifying unit 18 that is a secondary air filter is detachable inside the front air filter 17. Mounted on. An upper air filter 20 divided into left and right parts is movably attached to the upper surface of the frame assembly 16.

The frame assembly 16 is provided with a space for accommodating the upper air filter 20 moved from the upper surface side on the front surface side of the front air filter 17, and is moved to the upper surface side of the upper air filter 20 from the front surface side. A space for accommodating the partial air filter 17 is provided. Further, an air filter cleaning unit S is attached between the upper end of the front air filter 17 of the frame assembly 16 and the front end of the upper air filter 20.
That is, the front air filter 17 and the air cleaning unit 18 are interposed between the front suction port 4 and the front heat exchanger portion 8A. The upper air filter 20 is interposed between the upper surface suction port 5, a part of the front side heat exchanger part 8A, and the rear side heat exchanger part 8B. Accordingly, the air filter cleaning unit S is provided between the front suction port 4 and the upper suction port 5 so as to face each other.

The air filter cleaning unit S is formed to have the same length in the width direction as the width of the front air filter 17 and the upper air filter 20, which is the length in the width direction of the front suction port 4 and the upper suction port 5. . The arrangement position of the air filter cleaning unit S is within a so-called corner portion where the front surface portion and the upper surface portion of the front panel 2 intersect each other, and a dead space inevitably formed between the front panel 2 and the indoor heat exchanger 8. It is.
An electrical component box is attached to one side of the frame assembly 16, and a control unit (control means) N schematically shown in FIG. 1 is accommodated inside the electrical component box.

This control unit (control means) N receives signals from various switches and sensors provided in the remote controller (remote operation panel) or the indoor unit body 1, and in accordance with the signals, the compressor of the outdoor unit, the outdoor blower, Means for controlling the operation of the indoor blower 10 and the like, opening and closing of the movable panel 2A, control means for the blowout louvers 7a and 7b for adjusting the blowing direction blown from the blowout port 6, and operation of the air filter cleaning unit S described later Control means, display control means for displaying the operating state, and the like are provided.
An intake / exhaust device (a so-called “ventilation unit”) 11 is provided on the other side of the frame assembly 16. The control unit N and the intake / exhaust device 11 will be described later.

FIG. 2 is a longitudinal sectional view of the air filter cleaning unit S and the vicinity thereof.
As will be described later, the air filter cleaning unit S includes a rotary brush 30 that removes dust adhering to the front air filter 17 and the upper air filter 20, and accommodates the rotary brush 30 therein, and the rotary brush 30 removes the dust. The dust box 32 is provided with a dust receiving passage 31 for collecting the collected dust, and the sealing member 34 is configured to close the opening 33 on the lower surface of the dust box 32 so as to be freely opened and closed.
A part of the rotating brush 30 is exposed from the opening 33 in the dust box 32, and all except the opening 33 forms a sealed structure. The rotating brush 30 is assembled so as to be surely in contact with the front air filter 17 and the mesh surface of the upper air filter 20 passing therethrough. The dust receiving passage 31 is provided at the side of the rotating brush 30 and along the axial direction of the rotating brush 30, and the passage surface is formed below the axis of the rotating brush 30. Can be received.

The seal member 34 is formed of a flexible elastic material such as synthetic rubber, and is supported by the lift mechanism 45. Usually, it is in a position where it does not come into contact with the portion of the rotating brush 30 exposed from the opening 33, and the opening 33 can be closed by operating the lift mechanism 45 and driving the seal member 34 upward.
Inside the dust box 32, a scraping protrusion 35 is provided between the dust receiving passage 31 and the portion where the rotary brush 30 is accommodated. The scraping protrusion 35 is always inserted into the bristles of the rotary brush 30 in the axial direction of the rotary brush 30 and is in a position where the bristles are in sliding contact with the rotation of the rotary brush 30.

The dust box 32 is molded using an antistatic resin material and is subjected to antibacterial treatment. Therefore, it is possible to prevent the adhesion of dust and the generation of mold and maintain a clean state for a long time. Similarly, the antibacterial treatment of the rotating brush 30 can be used to prevent adhesion of dust and generation of mold and maintain a clean state for a long time.
Further, a smooth surface treatment is applied to the dust contact portion so that the movement of the dust within the dust box 32 is smooth. In particular, the dust receiving passage 31 is designed so that the thrust diameter is 12 mm or more over the entire cross-sectional area, and the pressure loss in the air filter cleaning operation is kept small, and the flow of wind is smooth. Further, the ridge line in the dust receiving passage 31 forms a curved surface of R2 mm or more on the windward side, thereby reliably preventing the occurrence of problems such as dust being caught and not moving.

FIG. 3 is a perspective view of one side portion (right side portion in front view) in which the front panel 2 is removed and the air filter cleaning unit S and the vicinity thereof are exposed.
On both the left and right sides of the dust box 32, handle portions 38 are integrally provided. When attaching or detaching the dust box 32 to or from a predetermined part of the frame assembly 16, it is easy to work with the handle portion 38. A rectangular air introduction hole 39 is provided on the upper surface of one side of the dust box 32. The air introduction hole 39 is provided to face the dust receiving passage 31 and communicates with each other.
A driving source and a driving mechanism for driving the air filter cleaning unit S and an air filter moving mechanism 55 to be described later are driven at a portion facing one side of the frame assembly 16 and facing the air filter cleaning unit S. A drive unit 25 including a drive source and a drive mechanism is attached.

The driving unit 25 includes four driving sources, i.e., first to fourth driving motors 46 to 49, and a casing 51 for mounting these driving motors 46 to 49 on a side surface and housing a gear train to be described later. The gear assembly G is provided.
The first drive motor 46 and the second drive motor 47 operate the gear train of the gear assembly G, move the front air filter 17 from the support position on the front side, and pass the air filter cleaning unit S. The front moving mechanism 52 that reciprocates up to the upper surface side of the upper air filter 20 and the upper air filter 20 are moved from the support position on the upper surface side, pass through the air filter cleaning unit S, and reach the front surface side of the front air filter 17. It is a drive source of the upper moving mechanism 53 which reciprocates.

The front moving mechanism 52 and the upper moving mechanism 53 constitute the filter moving mechanism 55. The front moving mechanism 52 and the upper moving mechanism 53 will be described in detail later with reference to FIGS.
In order to secure the torque required to drive these front and upper moving mechanisms 52 and 53, it is originally sufficient to prepare one large drive motor. Interference with panel 2 will occur. Therefore, two small drive motors 46 and 47 having half the required torque are prepared to eliminate the problem of the installation space.

The third drive motor 48 is a rotational drive source of the rotary brush 30. The fourth drive motor 49 selects and transmits the driving force of the first and second drive motors 46 and 47 to either the front moving mechanism 52 or the upper moving mechanism 53 via the gear train of the gear assembly G. Alternatively, it is a drive source for the switching mechanism 61 that switches the lift mechanism 45 to operate.
4 is a perspective view of a gear train constituting the gear assembly G. FIG. 5 shows a part of the gear train by omitting the side surface portion of the casing 51 of FIG. 4, and a lift mechanism 45 for supporting the seal member 34. FIG.
A pair of gears E having the same gear diameter are supported with a predetermined interval at the right corner of the casing 51. The shafts of the gears E are inserted with the rotation shafts of the first drive motor 46 and the second drive motor 47 described above through the casing 51, and the gears E are fitted to the drive motors 46 and 47, respectively. Fixed.

Each gear E is meshed with a gear (not shown), and a gear B is integrally provided on the back surface of the gear. The gear B meshes with an adjacent large-diameter gear A, and a small-diameter upper gear Fu is provided coaxially with the gear A. In other words, the gear A and the upper gear Fu are provided coaxially, but the gear A and the upper gear Fu are freely rotatable with respect to each other.
The casing 51 supports a gear C that meshes with the gear A. The gear C is always meshed with the gear C, and the gear D is supported at the tip of the drive arm 64 constituting the switching mechanism 61. Further, the front gear Ff is supported at a position symmetrical to the upper gear Fu around the gear C. The front gear Ff is fitted to the end of the spindle that constitutes the front moving mechanism 52.

On the other hand, the rotation shaft of the fourth drive motor 49 (not shown) projects inward through the casing 51, and the base end portion of the drive lever 65 is fitted and fixed to the rotation shaft. The drive lever 65 includes a tongue piece 65a that is integrally extended from the base end in a direction orthogonal to the axial direction, and the base end of the drive arm 64 rotates at the tip of the tongue piece 65a. It is connected freely.
The fourth drive motor 49, the drive lever 65, the drive arm 64, and the gear D constitute the switching mechanism 61. That is, the drive lever 65 and the drive arm 64 are integrally rotated according to the rotation direction of the fourth drive motor 49, and the position of the gear D at the tip of the drive arm 64 is changed.

Further, the front end portion of the drive arm 64 and the gear D constituting the switching mechanism 61 are rotatably supported by the lower end portion of the gear arm 66 through a pin. The gear arm 66 is supported at its upper end portion by the casing 51 via a support shaft portion p, and the gear C is also supported by the support shaft portion p.
The gear arm 66 is rotatable around the support shaft portion p together with the gear C, and the gear D and the distal end portion of the drive arm 64 are rotatably connected to the lower end portion of the gear arm 66. For this reason, the gear D always meshes with the gear C regardless of the rotational posture of the gear arm 66.

While the fourth drive motor 49 rotates the drive arm 64 via the drive lever 65, the gear D connected to the drive arm 64 maintains the meshed state with the gear C, while the gear D is the upper gear. It is possible to select a position that can mesh with either the Fu or the front gear Ff, or that does not mesh with any of the gears Fu and Ff.
As shown only in FIG. 4, microswitches 67 are attached to the corners of the casing 51. Depending on the rotationally displaced position of the driving arm 64, the driving arm 64 comes into contact with the actuator 67a of the micro switch 67 to be turned on, and a detection signal is sent to the control unit (control means) N shown in FIG. ing.

That is, the drive arm 64 turns on the micro switch 67 at a position where the gear D supported by the drive arm 64 does not mesh with either the upper gear Fu or the front gear Ff. In other words, when the micro switch 67 is in the OFF state, the gear D is in a position where it meshes with either the upper gear Fu or the front gear Ff.
The gear arm 66 constituting the switching mechanism 61 also serves as a lift mechanism 45 that supports the seal member 34. As shown only in FIG. 5, the lower end portion of the gear arm 66 forms a predetermined radius of curvature around the support shaft portion p, and an inner tooth portion 68 is provided on the inner surface side. A lift gear 69 meshes with the internal tooth portion 68, and the lift gear 69 is fitted and fixed to an end portion of a seal support shaft 70 that penetrates the side surface of the casing 51.

The seal support shaft 70 is supported by a bearing tool attached to the frame assembly 16 and is provided on the lower surface side of the seal member 34 and facing the longitudinal direction of the seal member 34. Therefore, when the fourth drive motor 49 constituting the switching mechanism 61 is driven to rotate the gear arm 66 via the drive lever 65 and the drive arm 64, the lift gear 69 also rotates. .
A seal drive cam 71 is provided at a predetermined portion of the seal support shaft 70. The seal drive cam 71 is generally cylindrical and includes a semi-disc-shaped cam portion q projecting in the radial direction at a part of the peripheral surface.

On the other hand, the seal member 34 is attached to a seal base 73, and the seal base 73 is supported by a seal guide mechanism 74 having a so-called pantograph structure. The seal guide mechanism 74 is provided in the frame assembly 16 and is folded in a flat shape in a normal posture where no lift force is applied. The seal guide mechanism 74 rises and deforms in a state where the lift force is applied upward, and the seal member 34 is moved together with the seal base 73. Pushes upward.
The seal driving cam 71 is configured to be able to contact and separate from a part of such a seal guide mechanism 74. When the seal drive cam 71 is in contact with a part of the seal guide mechanism 74, the seal guide mechanism 74 starts up, the seal member 34 is pushed up, and the seal drive cam 71 is separated from the seal guide mechanism 74. The seal guide mechanism 74 is naturally folded into a flat shape, and the seal member 34 is lowered.

The gear mechanism 66, the lift gear 69, the seal drive cam 71, and the seal guide mechanism 74 constitute the lift mechanism 45 for the seal member 34.
Next, the front moving mechanism 52 and the upper moving mechanism 53 will be described.
As shown in FIG. 2 again, a pair of support shafts 75a and 75b are provided in parallel along both sides of the seal member 34 that opens and closes the opening 33 of the dust box 32. The front gear Ff or the upper gear Fu constituting the gear assembly G is fitted and fixed to one end portion (right end portion) of each of the support shafts 75a and 75b. Actually, the front gear Ff is attached to the support shaft 75a, and the upper gear Fu is attached to the support shaft 75b.

The other end portions (left end portions) of the support shafts 75a and 75b are rotatably supported by the frame assembly 16 via bearings. Further, the front air filter drive gear 76 or the upper air filter drive gear 77 is fitted and fixed at the intermediate portion of the support shafts 75a and 75b and at the front and the portion facing the central reinforcing bar of the upper air filters 17 and 20. Is done. Before these, a part of upper air filter drive gear 76,77 protrudes from the opening part provided in the said frame assembly 16 to the front side or upper surface side.
On the other hand, a so-called rack (spur gear) 78 is provided along the longitudinal direction on the back surfaces of the central reinforcing bars of the upper air filters 17 and 20. The upper air filter drive gears 76 and 77 mesh with each rack 78 as a so-called pinion before protruding from the frame assembly 16.

When the front gear Ff rotates, the front air filter drive gear 76 provided on the support shaft 75a rotates, and the front air filter 17 rotates in the rotational direction of the front air filter drive gear 76 due to the relationship between the pinion and the rack. Is energized to move. When the upper gear Fu rotates, the upper air filter drive gear 77 provided on the support shaft 75b rotates, and the upper air filter 20 is moved in the rotational direction of the upper air filter drive gear 77 due to the relationship between the pinion and the rack. Be forced.
In this way, the front air filter drive gear 76 and the rack 78 provided on the front air filter 17 constitute a front moving mechanism 52 that moves the front air filter 17. The upper air filter drive gear 77 and the rack 78 provided on the upper air filter 20 constitute an upper moving mechanism 53 that moves the upper air filter 20.

FIG. 6 is a perspective view of one side portion (left side portion in front view) in which the front panel 2 is removed and the air filter cleaning unit S and the vicinity thereof are exposed.
A dust discharge cover is integrally attached to the other side of the dust box 32. The dust discharge cover communicates with the air introduction hole 39 through the dust receiving passage 31. With the air filter cleaning unit S attached to the frame assembly 16, the dust discharge cover is accommodated in a discharge box 41 provided in the frame assembly 16.
The discharge box 41 communicates with the intake / exhaust device 11 via a connection hose 42. Therefore, one end portion of the dust receiving passage 31 formed in the dust box 32 communicates with the outside of the air filter cleaning unit S outside the dust box 32 through the air introduction hole 39, and the other end portion of the dust receiving passage 31 is dust discharge. The intake / exhaust device 11 communicates with the cover through the discharge box 41 and the connection hose 42.

The connection hose 42 is bent so as to form a gentle curve and is connected to the intake / exhaust device 11. That is, since the dust removed from the upper air filters 17 and 20 circulates in the connection hose 42, it is considered not to be clogged in the middle. A dust guide case 95 is attached to the fan casing 90 constituting the intake / exhaust device 11.
The air filter cleaning unit S communicates with the inside of the fan casing 90 of the intake / exhaust device 11 through the connection hose 42. A wind damper is provided in the dust guiding case 95, and the dust is introduced into the fan casing 90 of the intake / exhaust device 11 through the wind damper.

When a wind pressure higher than a predetermined pressure is applied to the connection hose 42, the wind damper is pushed upward by the wind pressure to open the inside of the fan casing 90. Further, when the wind pressure becomes equal to or lower than the predetermined pressure, the wind damper closes the inside of the fan casing 90 again.
The intake / exhaust device 11 includes an opening / closing damper provided at a ventilation suction opening that opens at the center of the side surface of the fan casing 90, a mechanism for driving the opening / closing damper, and a ventilation mechanism such as a ventilation fan disposed in the fan casing 90. Consists of The fan casing 90 is provided with an exhaust port 90a, and an exhaust hose H connected to the exhaust port 90a extends to the outside through the mounting wall of the indoor unit body 1.

The intake / exhaust device 11 is originally provided with a ventilation function for discharging the air on the primary side or the secondary side of the indoor heat exchanger 8 to the outside after taking indoor air into the indoor unit body 1. In addition, as will be described later, the air filter cleaning unit S has an intake / exhaust function for sucking dust collected from the front air filter 17 and the upper air filter 20 and discharging it to the outdoors.
The control unit N shown in FIG. 1 again includes the above-described movable panel 2A, blowout louvers 7a and 7b, the indoor fan 10, the drive source of the ventilation fan of the intake / exhaust device 11, the air cleaning unit 18, the air filter cleaning unit S, and the air. The drive unit 25 of the filter moving mechanism 55 and the outdoor unit are electrically connected, and necessary control is performed based on an instruction signal from the remote controller.

Next, the operation of the air conditioner will be described.
When the user presses the operation button of the remote controller, the control unit N drives the indoor blower 10 and causes the air cleaning unit 18 to act. Further, the compressor in the outdoor unit is driven to start the refrigeration cycle operation, the indoor blower 10 is rotationally driven, and the blowout louvers 7a and 7b are rotationally displaced in a predetermined direction.
The room air is guided into the indoor unit body 1 from the front suction port 4 and the upper suction port 5 and passes through the front air filter 17 and the upper air filter 20. At this time, dust contained in the room air is captured by the front air filter 17 and the upper air filter 20. The room air from which the dust has been removed by the front air filter 17 passes through a pair of electrostatic precipitators constituting the air cleaning unit 18, and finer dust is electrically collected and deodorized.

The cleaned indoor air flows through the heat exchanger 8 and performs a heat exchange action with the refrigerant led to the room air. After that, the heat exchange air is guided along the blowout ventilation path 15, guided from the blowout opening 6 to the blowout louvers 7a and 7b and blown into the room, and the efficient air conditioning operation is continued.
The control unit N is set to perform a cleaning operation for automatically removing dust adhering to and adhering to the front air filter 17 and the upper air filter 20 when, for example, the above air conditioning operation is completed. .

  That is, as a cleaning operation mode for the air filters 17 and 20 set in the control unit N, basically, an air filter initialization mode for correctly correcting the position of the upper air filter 20 and the front air filter 17 at predetermined positions, A check mode for checking whether or not the air filter cleaning unit S functions correctly, and the upper air filter 20 and the front air filter 17 are guided to the air filter cleaning unit S and adhered to the air filters 20 and 17. The air filter cleaning mode for removing the dust and the dust discharge mode for discharging the dust collected in the air filter cleaning unit S to the outdoors by operating the intake / exhaust device 11 are executed in this order.

First, the air filter initialization mode will be described in detail.
FIGS. 7A and 7B are diagrams for sequentially explaining the air filter initialization mode. In FIG. 7, the air filters 20 and 17 and the air filter cleaning unit S are schematically shown. The detailed operation of the air filter cleaning unit S that executes the air filter initialization mode will be described in the description of the check mode and subsequent steps that are the next step.
In the air filter initialization mode, the a. ~ C. The initialization mode for the upper air filter 20 is executed as shown in FIG. ~ C. The initialization mode for the front air filter 17 is executed as shown in FIG.
That is, a. As shown, the upper air filter 20 is moved and the front end thereof is inserted into the air filter cleaning unit S. Specifically, the lift mechanism 45 is operated to move the seal member 34 downward to open the opening 33, and the upper moving mechanism 53 is driven to move the upper air filter 20 from the predetermined position to the front air filter cleaning unit S. Energize moving in the direction.

Inside the air filter cleaning unit S, the front end of the upper air filter 20 comes into contact with a filter detection microswitch provided in the dust box 32. The control unit N determines whether or not the contact time of the upper air filter 20 with respect to the microswitch has been in the ON state for a predetermined time (2 seconds).
When the control unit N determines that the upper air filter 20 continues to turn on the microswitch for a predetermined time or longer, the control unit N drives the upper moving mechanism 53 in the reverse direction, so that b. As shown, the upper air filter 20 is returned to a predetermined position. When the upper air filter 20 returns to the predetermined position, c. As shown, the lift mechanism 45 is actuated to move the seal member 34 up and close the opening 33. Therefore, the control unit N determines that the upper air filter 20 is in a predetermined position.

Next, an initialization mode for the front air filter 17 is executed as shown in FIG.
The front air filter initialization mode is the same as that shown in FIG. As shown in FIG. From the state where the sealing member 34 shown in FIG. 5 is closed, the lift mechanism 45 is operated, the sealing member 34 is moved downward to open the opening 33, and the front moving mechanism 52 is driven to move forward. The upper air filter 17 is moved and energized, and the upper end thereof is inserted into the air filter cleaning unit S.

Whether the upper end of the front air filter 17 is inserted into the air filter cleaning unit S and touches the filter detection micro switch provided therein, and whether or not the contact time has been kept on for a predetermined time (2 seconds). to decide. If the filter detection microswitch is continuously ON for a predetermined time, the front moving mechanism 52 is driven in the reverse direction, and b. As shown, the front air filter 17 is returned to a predetermined position.
When the front air filter 17 returns to the predetermined position, c. As shown, the lift mechanism 45 is actuated to move the seal member 34 up and close the opening 33. Therefore, the control unit N determines that the front air filter 17 is in a predetermined position.
Thus, the air filter initialization mode is completed, and then the check mode is executed, and the dust discharge mode is set through the air filter cleaning mode.

  The air filter cleaning mode includes an upper air filter cleaning mode for removing dust adhering to the upper air filter 20, a position confirmation mode for the upper air filter 20 for determining whether the upper air filter 20 has returned to a predetermined position, and A front air filter cleaning mode for removing dust adhering to the front air filter 17 and a position confirmation mode for the front air filter 17 for determining whether or not the front air filter 17 has returned to a predetermined position. It is executed in the order described above.

FIGS. 9A and 9B are schematic views for sequentially explaining the air filter cleaning mode, and FIG. 9C is a schematic view for sequentially explaining the dust discharge mode.
10 to 12 are schematic flowcharts of the check mode, the air filter cleaning mode, and the dust discharge mode. (In FIGS. 10 to 12, each air filter is simply described as “filter”.)
Further, in the following description, in addition to the description of the operation of each component shown in FIGS. 1 to 6, the description of the operation of the gear assembly G shown in FIGS. 8A to 8C is also performed.
First, the check mode will be described with reference to the flowchart of FIG. Specifically, the relationship between the seal member 34 constituting the air filter cleaning unit S and the opening 33 provided in the dust box 32 is checked.

In step T1 from the start, the air conditioning operation is stopped by pressing the stop button, and a predetermined time has passed since the previous air filter cleaning, or the manual cleaning button of the remote control is pressed and the signal is transmitted to the control unit N. The cleaning operation of the air filter is started.
In step T2, the open / close damper provided in the intake / exhaust device 11 is driven to close the intake port to enter the dust discharge mode. That is, the controller N instructs the intake / exhaust device 11 to enter the fully closed mode of the open / close damper.

In step T3, the switching mechanism 61 is moved to the front air filter 17 side. Specifically, the switching mechanism 61 is switched to the upper air filter 20 side in the previous air filter cleaning mode, and the gear D is engaged with the upper gear Fu as shown in FIG. Yes.
The control unit N sends a drive signal to the fourth drive motor 49 to rotate and displace the drive arm 64 via the drive lever 65. The gear D provided on the drive arm 64 changes from the meshing position with the upper gear Fu to the position where the gear D meshes only with the gear C as shown in FIG. 8C, and further as shown in FIG. Then, the gear D changes to a position where it engages with the front gear Ff and stops.

Along with the operation of the drive arm 64, a part of the drive arm 64 comes into contact with or separates from the actuator 67 a of the microswitch 67. In the initial state shown in FIG. 8B, the drive arm 64 is separated from the actuator 67a of the micro switch 67 and is turned OFF. In the next state shown in FIG. 8C, the drive arm 64 comes into contact with the actuator 67a and is turned on. In the next state shown in FIG. 8A, the drive arm 64 comes into contact with the actuator 67a and is turned off.
In step T4, it is determined whether or not the input of the micro switch 67 is repeated in the order of OFF-ON-OFF. If yes, the process moves to step T5 and is determined to be normal. That is, if it is normal, as shown in FIG. 2, the front air filter 17 and the upper air filter 20 do not exist in the dust box 32, and the opening 33 is open.

When No in step T4, a part of the front air filter 17 or the upper air filter 20 exists in the opening 33 of the dust box 32, and the drive arm 64 cannot contact the microswitch actuator 67a. In this case, the process proceeds to step T6 and an abnormality is displayed.
Thus, before the substantial air filter cleaning mode is performed, whether or not the front air filter 17 is correctly set in the front side air filter storage portion 16b of the frame assembly 16 and whether the upper air filter 20 is It is checked whether or not it is correctly set in the upper surface side air filter storage portion 16c.

Thus, the check mode is completed, and then the upper air filter 20 cleaning mode is entered.
In step T7, the switching mechanism 61 is moved to the upper air filter 20 side. That is, as shown in FIG. 8B, the gear D is engaged with the upper gear Fu. Moving to step T8, the switching mechanism 61 is continuously urged toward the upper air filter 20 side. In step T9, the filter drive motors 46 and 47 are driven.
Accordingly, the upper moving mechanism 53 operates to urge the upper air filter 20 to move to the front side of the front air filter 17. Specifically, the pair of gears E are rotationally driven in the same direction by driving the first and second drive motors 46 and 47. The gear B rotates through the gear E, and the rotational force is transmitted from the gear A meshing with the gear B to the gear C. Then, the rotational force is transmitted from the gear C to the upper gear Fu via the gear D, and the support shaft 75b that supports the upper gear Fu rotates.

The support shaft 75b is provided with an upper air filter drive gear 77, and the upper air filter 20 is pressed from the upper surface side and meshed with the rack of the central reinforcing bar. If the upper air filter drive gear 77 rotates, the upper air filter 20 starts to move reliably, and gradually moves down from the air filter housing portion 16c on the upper surface side.
At this time, the seal drive cam 71 constituting the lift mechanism 45 is separated from the seal guide mechanism 74, the seal guide mechanism 74 is folded flat, the seal member 34 is in the lowered position, and the opening 33 is opened. ing. Therefore, the upper air filter 20 is inserted through a gap formed between the lower end of the dust box 32 and the seal member 34.

Moving to step T10, the rotary brush 30 is driven after the upper air filter 20 starts moving. That is, the rotary brush 30 is set to be driven to rotate with a time difference from the movement of the upper air filter 20. Therefore, the bristles of the rotating brush 30 are in contact with only the mesh portion of the upper air filter 20 and do not need to be in contact with the frame portion.
In FIG. As shown, the upper air filter 20 faces the rotating brush 30 sequentially from the front end to the rear end side, and moves downward while sliding. Dust adhering to the upper air filter 20 is smoothly and reliably scraped off and removed by the rotating brush 30. Dust is transferred from the upper air filter 20 to the rotating brush 30.
Immediately after this, the rotating brush 30 passes in contact with the scraping projection 35. Since the scraping projection 35 is formed in a comb-like shape, the dust transferred to the rotary brush 30 is scraped off and falls into the dust receiving passage 31. Since the dust receiving passage 31 has a sealed structure except that a portion facing the rotating brush 30 is opened, the scraped dust does not scatter from the dust receiving passage 31 to the periphery.

The upper air filter 20 is inserted into a front-side air filter housing portion 16 d provided in the frame assembly 16 and housing the front air filter 17 while dust is removed by the rotating brush 30. That is, the upper air filter 20 is guided on the upper side of the front air filter 17 so as to face each other with a narrow gap therebetween.
Moving to Step T11, when the movement of the upper air filter 20 is completed, the cleaning actuator is stopped for a short time. Specifically, when the rear end of the upper air filter 20 is inserted into the upper end of the air filter housing portion 16d on the front side, the control unit N drives the first and second drive motors 46 and 47 and the rotary brush 30. Control to stop once.

Next, the process proceeds to step T12, and the rotary brush 30 is rotationally driven. In step T12, the filter drive motor is driven in reverse to move the upper air filter 20 to the original position. That is, the control unit N sends a drive signal that rotates in the reverse direction to the first and second drive motors 46 and 47.
B. In FIG. As shown, the gears rotate in the opposite direction, and the upper moving mechanism 53 moves the upper air filter 20 upward. Although all dust is removed from the upper air filter 20 by the dust removing action, dust may remain on the upper air filter 20 depending on conditions. Therefore, since the upper air filter 20 is slidably contacted with the rotating brush 30 even when it moves upward, all remaining dust is reliably removed.

In step T14, the driving of the rotating brush 30 is stopped before the movement of the upper air filter 20 is completed. That is, the upper air filter 20 moves backward and returns from the air filter housing portion 16b on the front surface side to the air filter housing portion 16c on the upper surface side, but the rotation of the rotary brush 30 immediately before the drive motors 46 and 47 stop driving. To stop. Therefore, the rotating brush 30 contacts only the mesh portion of the upper air filter 20 and efficiently removes dust.
C. In FIG. As shown in FIG. 4, when the upper air filter 20 is stopped, the cleaning process for the upper air filter 20 is completed. Next, the operation proceeds to the position confirmation mode of the upper air filter 20 shown in FIG.

In step T15, the switching mechanism 61 is moved to the front air filter 17 side. As described above, the gear D changes from being engaged with the upper gear Fu to being engaged with the front gear Ff after being engaged with the gear C. In step T15, it is determined in step T16 whether or not the input of the micro switch 67 has changed to OFF-ON-OFF. If Yes, it is normal and the front air filter 17 and the upper air filter 20 are not present in the dust box 23, so that the process proceeds to Step T17. If No, an abnormality is displayed in Step T18.
In step T17, it is determined whether or not cleaning has been performed for both the upper air filter 20 and the front air filter 17 in the previous air filter cleaning mode. That is, since the dirt of the upper air filter 20 is larger than that of the front air filter 17 as described above, the mode in which only the upper air filter 20 is cleaned is performed first, and then the upper air filter 20 and the front air filter 20 are cleaned. The control unit N is set to perform a mode for cleaning both the partial air filters 17.

Therefore, when it is determined No in step T17, only the upper air filter 20 is cleaned first, the front air filter 17 is not cleaned, and the front air filter cleaning mode is entered. If it is determined as Yes, it means that both the upper air filter 20 and the front air filter 17 have been cleaned last time. Therefore, the cleaning of the front air filter 17 is omitted, and the front air filter 17 described later is omitted. Move to position confirmation mode.
First, the case where it is determined No in step T17 and the front air filter 17 is shifted to the cleaning mode will be described.
In step T19, the switching mechanism 61 is continuously driven to the front air filter 20 side. The gear D meshes with the front gear Ff. In step T20, the filter drive motors 46 and 47 are driven to move the front air filter 17 to the upper air filter 20 side. At this time, since the sealing member 34 is in the lowered position and the opening 33 of the dust box 32 is opened, the front air filter 17 is inserted through a gap formed between the lower end of the dust box 32 and the sealing member 34.

Moving to step T21, the rotary brush 30 is driven after the front air filter 17 starts moving. Since the rotary brush 30 rotates with a time difference from the movement of the front air filter 17, the bristles of the rotary brush 30 come into contact with only the mesh part of the front air filter 17 and efficiently remove dust.
A. In FIG. As shown, the front air filter 17 faces the rotating brush 30 sequentially from the upper end to the lower end side, and moves upward while sliding. The dust adhering to the front air filter 17 is smoothly and reliably scraped off and removed by the rotating brush 30. Dust is transferred from the front air filter 17 to the rotating brush 30, but immediately after that, the rotating brush 30 comes into contact with the scraping projection 35, so that all dust is scraped off and falls into the dust receiving passage 31.

The upper air filter 20 is inserted into the air filter housing portion 16c on the upper surface side for housing the upper air filter 20 while dust is removed by the rotating brush 30. That is, the front air filter 17 is guided on the upper side of the upper air filter 20 so as to face each other with a narrow gap therebetween.
Moving to Step T22, when the movement of the front air filter 17 is completed, the cleaning actuator is stopped for a short time. Specifically, when the lower end of the front air filter 20 is inserted into the front end of the air filter housing portion 16c on the upper surface side, the control unit N drives the first and second drive motors 46 and 47 and the rotary brush 30. Control to stop once.

Next, the process proceeds to step T23, and the rotary brush 30 is rotationally driven. In step T24, the first and second drive motors 46 and 45, which are filter drive motors, are driven in reverse to move the front air filter 17 to the original position. To do.
B. In FIG. As shown, each gear rotates in the reverse direction, and the front moving mechanism 52 moves the front air filter 17 downward. Any remaining dust is reliably removed. In step T25, the driving of the rotating brush 30 is stopped before the movement of the front air filter 17 is completed. Therefore, the rotating brush 30 contacts only the mesh portion of the front air filter 17 and efficiently removes dust.

C. In FIG. As shown, the front air filter 17 cleaning mode ends when the front air filter 17 returns to the original storage position. In this state, the lift mechanism 45 is driven, and the seal member 34 is driven upward to close the opening 33 of the dust box 32.
Thus, the front air filter 17 cleaning mode is completed, and then the operation proceeds to the confirmation mode for the position of the front air filter 17 shown in FIG.
Moving to Step T26, the switching mechanism 61 is moved to the upper air filter 20 side. The gear D changes from being engaged with the front gear Ff to being engaged with the upper gear Fu after being engaged with the gear C. In step T26, it is determined again in step T27 whether or not the input of the micro switch 67 has changed to OFF-ON-OFF. If Yes, it is normal, the front air filter 17 and the upper air filter 20 are not present in the dust box 23, and the opening 33 is completely open, so the process proceeds to Step T28. If No, an abnormality is displayed in step T29.

In step T28, the switching mechanism 61 is moved toward the front air filter 17 as a pre-process for raising the seal member 34. Therefore, the gear D changes from being engaged with the upper gear Fu to being engaged with the front gear Ff after being engaged with the gear C. This operation is performed to keep the position of the switching mechanism 61 in the same state at the end of the process of cleaning only the upper air filter 20 and the process of cleaning both the upper air filter 20 and the front air filter 17. is there.
Next, moving to step T30, the switching mechanism 61 is moved from the front air filter 17 side to the intermediate position on the upper air filter 20 side. As a result, the sealing member 34 is raised. More specifically, as shown in FIG. 8C, when a part of the drive arm 64 comes into contact with the actuator 67a of the micro switch 67 and is turned ON, the control unit N receives the signal and receives the fourth drive motor. 49 is stopped.

The gear D supported by the drive arm 64 is separated from the upper gear Fu and the lower gear Ff and is not in meshing relation, and is located at an intermediate portion between the upper gear Fu and the front gear Ff. The gear C is in meshing relationship only. As shown in FIG. 5 again, the gear arm 66 connected to the drive arm 64 assumes a substantially vertical posture, and the cam portion q of the seal drive cam 71 provided on the seal support shaft 70 also projects in a substantially vertical direction. .
The cam guide q causes the seal guide mechanism 74 to rise, and the seal member 34 attached to the seal base 73 is lifted and urged so as to be in close contact with the lower surface of the dust box 32. Therefore, the opening 33 provided on the lower surface of the dust box 32 is completely closed by the seal member 34.

Thus, the confirmation mode for the position of the front air filter 17 is completed, and the operation proceeds to the next dust discharge mode. However, if the determination in step T17 in the confirmation mode for the upper air filter 20 position described above is Yes, the process proceeds to step T30 in the confirmation mode for the front air filter 17 position.
A. In FIG. As shown in FIG. 4, in the dust discharge mode, the rotating brush 30 is driven in step T31. Next, the process proceeds to step T32, a drive signal is sent to the ventilation fan of the intake / exhaust device 11, and the ventilation fan is operated at high speed for a predetermined time (10 seconds).
Therefore, a negative pressure is applied to the inside of the dust guiding case 95 of the intake / exhaust device 11, and the wind damper provided therein is opened. The negative pressure accompanying the high-speed rotation of the ventilation fan acts on the air filter cleaning unit S from the dust guiding case 95 via the connection hose 42 and the discharge box 41.

  The negative pressure is concentrated on the dust receiving passage 31 through the dust discharge cover 40 covered by the discharge box 41, and the dust collected in the dust receiving passage 31 is sucked. Since one end of the dust receiving passage 31 communicates with the air introduction hole 39 provided at the end of the dust box 32, the air around the dust box 32 is forcibly sucked from the air introduction hole 39 into the dust receiving passage 31. . Therefore, the dust collected in the dust receiving passage 31 is also scraped out by the sucked air, and comes out of the dust box 32 and guided to the connection hose 42.

In addition, the material selection and surface treatment of the dust box 32 itself are performed, and the conditions for allowing the dust to easily pass through the entire structure of the dust receiving passage 31 are adjusted. And is reliably discharged and sucked into the intake / exhaust device 11 from the connection hose 42. In the intake / exhaust device 11, dust moves from the dust guide case 95 along the inner peripheral surface of the fan casing 90 and is discharged to the outside from the exhaust port 90a.
Next, the process proceeds to step T33, and the ventilation fan is operated at a medium speed for a predetermined time. The dust remaining in the dust box 32 can be reliably discharged by performing the operation for a predetermined time (50 seconds) longer than the operation time (10 seconds) of the high-speed operation.
Since the ventilation fan is operated at high speed in the previous step, the dust collected in the dust receiving passage 31 is moving efficiently, and even if the speed of the ventilation fan is reduced, the movement of the dust does not change, and the power consumption is reduced. Reduction and driving noise can be reduced.

Moving to Step T34, the open / close damper provided in the intake / exhaust device 11 is switched to return to the normal ventilation mode position, and the ventilation fan is stopped. The rotation of the rotating brush 30 is stopped immediately before the ventilation fan is stopped (5 seconds before). In step T35, the switching mechanism 61 is moved to the upper air filter 20 side.
B. In FIG. Then, the lift mechanism 45 is driven to raise the seal member 34 and close the opening 33 to complete the process.
Thus, the control unit N checks the air filter initialization mode for correcting the position of the upper air filter 20 and the front air filter 17 at predetermined positions, and the check for checking whether the air filter cleaning unit S functions correctly. Collected in the air filter cleaning unit S by operating the air filter 20 and 17 to the air filter cleaning unit S and removing the dust adhering to the air filter, and the intake / exhaust device 11. And a dust discharge mode for discharging the dust to the outdoors.

More specifically, the control unit N has an air filter initialization mode for correcting the position of the upper air filter 20 and the front air filter 17 at predetermined positions when the start signal of the air filter cleaning operation is input. Check mode for checking whether or not the opening 33 is correctly opened and closed, the upper air filter 20 and the front air filter 17 are alternately guided to the air filter cleaning unit to remove dust adhering to the air filters 20 and 17. An air filter cleaning mode and a dust discharge mode for discharging dust collected in the air filter cleaning unit S to the outside by operating the intake / exhaust device 11 are provided.
Therefore, the dust adhering to the upper air filter 20 and the front air filter 17 is surely removed in the air filter cleaning unit S, and all the dust is smoothly discharged to the outdoors by the air intake / exhaust device 11, so that the indoor unit It is possible to automatically remove dust from the air filters 20 and 17 without increasing the size of the main body 1 to reduce the time required for cleaning and to shorten the cleaning time.

In the check mode, the seal member 34 is driven up and down to determine the opening / closing operation of the seal member 34 with respect to the opening 33. After the normality determination, the upper air filter 20 and the front air filter 17 are connected to the air filter cleaning unit. It was made to move to a predetermined position away from S. Therefore, smooth execution of the air filter cleaning mode can be achieved.
In the air filter cleaning mode, immediately before the upper air filter 20 and the front air filter 17 are sent to the air filter cleaning unit S, the rotary brush 30 is rotationally driven, and immediately before the air filters 20 and 17 are sent from the air filter cleaning unit S. The rotation of the rotary brush 30 is stopped. Therefore, idling of the rotating brush 30 is prevented.

The air filter cleaning mode is executed in the order of a cleaning mode for the upper air filter 20, a position confirmation mode for the upper air filter 20, a cleaning mode for the front air filter 17, and a position confirmation mode for the front air filter 17. . Therefore, smooth execution of the air filter cleaning mode can be achieved.
In the air filter cleaning mode, the rotary brush 30 is rotationally driven immediately before the upper air filter 20 and the front air filter 17 are sent to the air filter cleaning unit S, and the upper air filter 20 and the front air filter are moved from the air filter cleaning unit S to the air filter cleaning mode. The rotation of the rotary brush 30 is stopped immediately before the 17 is sent out. Therefore, idling of the rotating brush 30 is prevented.

In the dust discharge operation mode, the opening 33 of the air filter cleaning unit S is closed by the seal member 34, and then the rotary brush 30 is driven to rotate and the intake / exhaust device 11 is operated. Therefore, the action of the intake / exhaust device 11 is ensured.
Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments.

The schematic block diagram of the air conditioner indoor unit based on Embodiment in this invention. The longitudinal cross-sectional view of the air filter cleaning unit based on the embodiment. The perspective view of the one side part inside an indoor unit main body based on the embodiment. The perspective view of the gear assembly based on the embodiment. The gear assembly and the partial perspective view of a lift mechanism based on the embodiment. The perspective view of the other side part inside an indoor unit main body based on the embodiment. The figure which shows air filter initialization mode based on the embodiment roughly. The figure explaining the action | operation of the gear assembly based on the embodiment. The figure which shows schematically the upper air filter cleaning mode based on the embodiment, front air filter cleaning mode, and dust discharge mode. The 1st step of the air filter automatic cleaning flowchart based on the embodiment. The 2nd step of the air filter automatic cleaning flowchart based on the embodiment. The 3rd step of the air filter automatic cleaning flowchart based on the embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 8 ... Heat exchanger, 10 ... Blower, 1 ... Indoor unit main body, 4 ... Front suction port, 5 ... Top suction port, 17 ... Front air filter, 20 ... Upper air filter, S ... Air filter cleaning unit, 11 ... Intake / exhaust device, N ... control unit (control means), 30 ... rotating brush, 33 ... opening, 31 ... dust receiving passage, 32 ... dust box, 34 ... sealing member.

Claims (5)

In an indoor unit of an air conditioner that houses a heat exchanger and a blower in an internal air passage, and has a suction port on the upstream side of the heat exchanger,
A plurality of divided air filters disposed opposite to the suction port;
A rotating brush disposed between the plurality of divided air filters, driven in conjunction with the movement of each air filter to remove dust adhering to each air filter, and the rotating brush provided facing the rotating brush. A dust box provided with a dust receiving passage for collecting the dust scraped off by the rotary brush, and an opening for contacting the air filter and the side of the rotary brush, and the opening of the dust box can be freely opened and closed An air filter cleaning unit including a sealing member for closing;
An intake / exhaust device that is disposed on one side of the indoor unit main body and includes a fan that sucks dust collected in the dust receiving passage of the dust box and discharges it to the outdoors;
Check mode for checking whether or not the seal member correctly opens and closes the opening at the start of an air filter cleaning operation, and air for removing dust adhering to each air filter by guiding each air filter to the air filter cleaning unit An air conditioner comprising: a filter cleaning mode; and an air filter cleaning operation control means having a dust discharge mode for operating the intake / exhaust device to discharge dust collected in the air filter cleaning unit to the outside. Indoor unit. The check mode by the control means is
The seal member is driven up and down to determine the opening / closing operation of the seal member with respect to the opening, and after normality determination, each air filter is moved to a predetermined position away from the air filter cleaning unit. The indoor unit of the air conditioner according to claim 1 . The air filter cleaning mode by the control means is
The indoor unit for an air conditioner according to claim 1, wherein the cleaning is performed for one air filter and the position confirmation mode for the air filter, and the cleaning for the other air filter and the position confirmation mode for the air filter are executed in this order. The air filter cleaning mode by the control means is
Immediately before feeding each air filter to the air filter cleaning unit, the rotary brush is driven to rotate,
The indoor unit of an air conditioner according to claim 1, wherein the rotation of the rotary brush is stopped immediately before each air filter is sent out from the air filter cleaning unit. The dust discharge operation mode by the control means is
The indoor unit of an air conditioner according to claim 1, wherein the opening of the air filter cleaning unit is closed with a seal member, and then the rotary brush is driven to rotate and the intake / exhaust device is operated.

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