JP4909699B2 - Air conditioner indoor unit - Google Patents

Description

  The present invention relates to an air conditioner indoor unit having a cleaning function for an air filter and a blower fan and a function of discharging dust removed therefrom to the outside.

  An indoor unit of an air conditioner that is generally used frequently 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 attach and detach the air filter, and dust is likely to remain attached to the air filter. If left for a long period of time, the air filter will be clogged with dust, leading to a decrease in heat exchange efficiency.

  Recently, an indoor unit of an air conditioner having a mechanism for automatically removing dust adhering to an air filter has been provided. However, since the air filter cleaning mechanism contacts the surface of the air filter to remove dust, a part of the dust falls on the back side of the air filter and adheres to the heat exchanger. Or, for example, powdery dust passes through the air filter and adheres to the heat exchanger.

In [Patent Document 1], a cleaning spray device is provided on the top of the heat exchanger, and cleaning liquid and rinsing liquid are sprayed to remove dust adhering to the fin surface. Furthermore, an air conditioner is disclosed in which a movable drip-proof cover is installed so that splashed water drops do not fall on other structures (blowers), and the washed liquid is collected in a dew tray and discharged outside the machine. ing.
JP 11-337105 A

  By the way, in the technique of the above-mentioned [Patent Document 1], the drip-proof cover operates at a timing immediately before spraying a liquid such as a cleaning liquid and covers the blower. In other words, water droplets are not applied to the blower during liquid spraying, but the fine water droplets that bounce off the drip-proof cover become mist and float in the indoor unit main body.

  In a general indoor unit, an electrical component box is juxtaposed on the side of a heat exchanger, and an electrical component such as a blower or an electrical component that controls a signal sent from a remote controller is accommodated. Since some of these electrical components generate a significant amount of heat, they have a structure in which cooling air is taken into the box to cool the electrical components and take out the air whose temperature has risen. Absent.

  Therefore, a part of the floating mist-like water droplets may enter the electrical component box, wet the electrical components, and cause a leakage accident. In addition, the powdery dust passes through the heat exchanger and reaches the blower, and easily adheres to the fan due to the influence of static electricity generated as the fan rotates. Therefore, it is necessary to clean the fan, and development of an effective cleaning mechanism that does not use a cleaning liquid is desired.

  The present invention has been made on the basis of the above circumstances, and its purpose is to automatically remove dust adhering to the blower fan and to reduce the time required for cleaning the fan. It aims to provide an indoor unit of an air conditioner that can improve the cleanliness of the air conditioner.

In order to satisfy the above object, an indoor unit of an air conditioner of the present invention includes an indoor air inlet and a heat exchange air outlet in an indoor unit main body, and an air passage that connects the inlet and the outlet. An air filter, a heat exchanger, and a cross flow fan are disposed along the air flow path, and a fan cleaning mechanism is provided for removing dust adhering to the cross flow fan and adhering to the cross flow fan as the cross flow fan rotates. An air intake / exhaust air that is installed next to the side and facing the side end face of the cross-flow fan and that communicates with the fan cleaning mechanism and sucks the dust removed by the fan cleaning mechanism together with air from the dust inlet and discharges it outside the room. Mechanism.

  According to the indoor unit of the air conditioner of the present invention, it is possible to reduce the time required for cleaning the fan and to improve the cleanliness inside the main body.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic longitudinal sectional view of an indoor unit of an air conditioner, and FIG. 2 is a front perspective view of the interior of the indoor unit body 1 with the front panel 2 removed. (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 and a rear panel housing 3, and has a horizontally long shape when viewed from the front. A front suction port 4 is opened at a part of the front side of the front panel 2 and a movable panel P supported by an opening / closing drive mechanism is fitted therein. When the operation is stopped and when the air filter cleaning mechanism A and the fan cleaning mechanism B described later are operated, the movable panel P becomes flush with the front panel 2 and closes the front suction port 4. Further, during the air-conditioning operation, the movable panel P is controlled to project and displace to the front side and form a gap with the main body 1 to open the front suction port 4.

  An upper suction port 5 is provided across the upper portions of the front panel 2 and the rear panel housing 3. A frame-like crosspiece 6 is fitted into the upper suction port 5 and is partitioned into a plurality of spaces by the crosspiece 6. A blowout port 7 is opened at the lower portion of the movable panel P, and a blowout louver 8 is provided at the blowout port 7. The blowout louver 8 can open and close the blowout opening 7 when the operation is stopped and when the air filter cleaning mechanism A and the fan cleaning mechanism B are operated, and can set the blowout direction of the heat exchange air according to the air conditioning operation conditions.

  In the indoor unit main body 1, a heat exchanger 10 formed in a substantially inverted V shape by a front heat exchanger portion 10A and a rear heat exchanger portion 10B is disposed. The front heat exchanger portion 10A is formed in a substantially parallel curved shape with a gap with the front panel 2, and faces a part of the front suction port 4 and the upper suction port 5, and the rear heat exchanger portion 10B. Is formed in a straight shape and is opposed to the upper suction port 5 in an inclined manner.

  The lower end portion of the front heat exchanger portion 10A is placed on the front drain pan 9a, and the lower end portion of the rear heat exchanger portion 10B is placed on the rear drain pan 9b, and is dripped from the respective heat exchanger portions 10A and 10B. It receives water and can drain to the outside through a drain hose (not shown).

  On the other hand, a front air filter 11A is attached between the front suction port 4 and the front heat exchanger portion 10A. An upper air filter 11B is attached between the upper suction port 5 and a part of the front heat exchanger portion 10A and the upper heat exchanger portion 10B. Both the front air filter 11A and the upper air filter 11B may not be configured to be easily detachable by the user as in a conventional indoor unit.

  That is, the front air filter 11A and the upper air filter 11B are configured to automatically remove dust that has been captured and adhered by the air filter cleaning mechanism A provided on the surface side thereof. Therefore, the front air filter 11A and the upper air filter 11B may have any configuration that can be removed as necessary by a professional worker for maintenance or the like.

  The air filter cleaning mechanism A is supported by a pair of left and right main guides 12 whose longitudinal ends are provided along both widthwise sides of the front air filter 11A and the upper air filter 11B, and an intermediate portion is a front portion. The air filter 11A and the upper air filter 11B are supported by a pair of left and right sub guides 13 provided in the middle portion. Both the main guide 12 and the sub guide 13 are provided from the lower end of the front air filter 11A (also the upper end of the outlet 7) to the rear end of the upper air filter 11B.

  A so-called rack a is provided on the surface of the main guide 12, whereas the air filter cleaning mechanism A includes a pinion gear that meshes with the rack a. Since one side portion of the air filter cleaning mechanism A is provided with a drive mechanism for driving the pinion gear, the air filter cleaning mechanism A automatically moves along the main guide 12 and the sub guide 13 by rotationally driving the pinion gear. I can run.

  The air filter cleaning mechanism A includes a horizontally long dust box 15 that extends over the left and right main guides, and a roll brush that is accommodated in one side of the dust box 15 and has an axial length extending over the entire length of the dust box 15. 16, a dust receiving passage 17 formed on the other side of the dust box 15, and a brush driving mechanism that rotationally drives the roll brush 16.

  The roll brush 16 is supported so that the tip of the roll brush contacts the front air filter 11A and the upper air filter 11B. Therefore, when the roll brush 16 is driven to rotate, the dust adhering to the front air filter 11A and the upper air filter 11B can be removed and taken into the dust box 15. The dust receiving passage 17 is formed at a position for receiving the dust removed by the roll brush 16.

  As shown in FIG. 1 again, the indoor blower 20 is disposed between the front and rear heat exchanger portions 10A and 10B of the heat exchanger 10 formed in the umbrella shape. The indoor blower 20 includes a fan motor and a fan 21 whose one support shaft is mechanically connected to the rotation shaft of the fan motor. The fan 21 is a cross-flow fan (cross-flow fan), and is processed as described later.

  As shown only in FIG. 2 (omitted in FIG. 1), an air cleaning unit C is attached between the front air filter 11A and the front surface of the front heat exchanger 10A of the heat exchanger 10. ing. The air cleaning unit C collects fine dust that cannot be captured by the front air filter 11A and also performs a deodorizing action.

FIG. 3 is a schematic configuration diagram of the cross-flow fan 21.
The cross-flow fan 21 includes disk-shaped end plates 22 provided on both sides in the axial direction, and a plurality of disk-shaped intermediate partition plates juxtaposed at a predetermined interval between the both side end plates 22. 23, and a plurality of blades 24 that pass through the groove portions provided along the peripheral end portions of the both side end plates 22 and the intermediate partition plate 23, and are attached and fixed by means such as adhesion.

  A hole 22a is provided in the shaft core portion of the right end plate 22 in the figure, and the rotation shaft of the fan motor is inserted and fixed therein. A support shaft 22b is projected outwardly from the shaft core portion of the left end plate 22 in the drawing, and this support shaft 22b is supported by a bearing portion provided on the side of the cross flow fan 21.

  Further, the right end plate 22 in the drawing is provided with a plurality of arc-shaped elongated holes b between the hole portion 22a and the peripheral end portion, and the left end plate 22 has a support shaft 22b and a peripheral end portion. A plurality of holes c are provided in between. The intermediate partition plate 23 is provided with a circular opening d in an axial center portion excluding the attachment portion of the blade 24.

  The cross-flow fan 21 can be driven to rotate to suck air from the circumferential direction and blow it out in the circumferential direction. On the other hand, the arc-shaped elongated hole b provided in one end plate 22 and the opening d provided in the intermediate partition plate 23 and the hole c provided in the other end plate 22 are in communication with each other. . That is, a dust collection opening 25 made of the hole b or the like is formed inside the blades 24 constituting the cross flow fan 21.

As shown in FIG. 1 again, the outer surfaces of the side walls of the front and rear drain pans 9a and 9b are provided at positions close to the indoor fan 20, and these constitute a nose for the cross-flow fan 21 of the indoor fan 20. A partition wall member 26 connects the side wall portions of the front and rear drain pans 9a and 9b constituting the nose and each side portion of the outlet 7. A space surrounded by the partition wall member 26 becomes a blowout air passage 27 that communicates the nose and the blowout port 7.

  By rotating and driving the cross-flow fan 21 of the indoor blower 20, a blower passage 28 that connects the front suction port 4 and the upper suction port 5 and the blowout port 7 is formed, and a part thereof is the blowout blower passage. 27. The front air filter 11 </ b> A and the upper air filter 11 </ b> B, the heat exchanger 10, and the indoor blower 20 are sequentially arranged from the upstream side to the downstream side of the air blowing path 28.

  The fan cleaning mechanism B for cleaning the cross-flow fan 21 of the indoor blower 20 is provided in the vicinity of the nose component of the front drain pan 9a. The fan cleaning mechanism B includes a cleaning tool 30 such as a brush that is disposed to face the entire length of the cross flow fan 21 in the axial direction, and an advance / retreat drive mechanism that moves the cleaning tool 30 back and forth. In a state where the cleaning tool 30 is moved forward, the brush tip contacts the cross flow fan 21 and moves backward so that the brush tip is separated from the cross flow fan 21.

  An electric component box 29 is juxtaposed on one side of the heat exchanger 10. In the electrical component box 29, a control that is an assembly of semiconductor components and electrical components that control the indoor blower 20 and other electric components based on signals sent from a remote controller and signals sent from various sensors. Part S is accommodated. Some electric components generate a remarkably large amount of heat, so they are provided with cooling openings for taking in the cooling air to cool the electric components and taking out the air whose temperature has risen, and are not sealed.

An intake / exhaust mechanism D, which will be described later, is provided on the side of the heat exchanger 10 opposite to the electrical component box 29. The intake / exhaust mechanism D is provided adjacent to the side of the cross-flow fan 21 constituting the indoor blower 20, and has an axis on the extension of the axis of the cross-flow fan 21.
Next, the intake / exhaust mechanism D will be described in detail.
4 is a diagram for explaining the operation of the air filter cleaning mechanism A and the fan cleaning mechanism B with respect to the intake / exhaust mechanism D, FIG. 5 is a perspective view of a part of the intake / exhaust mechanism D and the air filter cleaning mechanism A, and FIG. FIG. 7 is an exploded perspective view of a part of the intake / exhaust mechanism D, and FIG.

  The intake / exhaust mechanism D has a function of discharging dust removed by the air filter cleaning mechanism A and the fan cleaning mechanism B to the outside. Specifically, as shown in FIG. 4, an air filter guide path 32 for guiding the removed dust is interposed between the air filter cleaning mechanism A and the intake / exhaust mechanism D, and the fan cleaning mechanism B is provided. Between the air intake and exhaust mechanism D, a fan guide path 33 for guiding the removed dust is formed.

  The air filter guide path 32 and the fan guide path 33 include opening / closing mechanisms 34 and 35 that open and close in reverse. That is, when the open / close mechanism 34 opens the air filter guide path 32, the fan guide path 33 is closed by the open / close mechanism 35, and when the open / close mechanism 35 opens the fan guide path 33, the air filter guide path 33. 32 is operated so that the opening / closing mechanism 34 is closed.

  The air filter guide path 32 is connected to a part of the peripheral surface of the fan casing 36 constituting the intake / exhaust mechanism D. The fan guide path 33 is opposed to a dust introduction port 37 formed in the intake / exhaust mechanism D, and the dust introduction port 37 is located at a position opposed to the bearing portion of the cross-flow fan 21.

  Therefore, the air filter guide path 32 and the fan guide path 33 are joined by the intake / exhaust mechanism D. Therefore, the air filter cleaning mechanism A and the fan cleaning mechanism B can be handled by one intake / exhaust mechanism D, and the indoor unit main body 1 can be made compact and simplified by common parts.

The intake / exhaust mechanism D includes a ventilation fan 38 formed of a multiblade fan in a fan casing 36. The axial centers of the ventilation fan 38 and the cross flow fan 21 are on the same axis L, and the dust inlet 37 is formed between them.
Moreover, the fan cleaning mechanism B and the intake / exhaust mechanism D are controlled so as to interlock with each other. For example, the intake / exhaust mechanism D may be started in synchronism with the start of operation of the fan cleaning mechanism B, and the intake / exhaust mechanism D is operated after a predetermined time has elapsed since the fan cleaning mechanism B started operating. Alternatively, the fan cleaning mechanism B may be operated after a predetermined time has elapsed after the operation of the intake / exhaust mechanism D is started.

Further, an exhaust duct 39 is connected to the fan casing 36, and the exhaust duct 39 extends through the wall K of the house and has an open end extending to the outdoors.
As shown in FIG. 5, only one end of the dust box 15 constituting the air filter cleaning mechanism A is opened and covered with the discharge box 40. The discharge box 40 and the fan casing 36 of the intake / exhaust mechanism D are communicated with each other by a connection hose 41, and the connection hose 41 forms a part of the air filter guide path 32.

  The connection hose 41 is bent so as to form a gentle curve as a whole, and consideration is given so that dust that conducts the inside does not get clogged in the middle. The air filter cleaning mechanism A has a sufficient length so as not to be affected by the movement and displacement position of the dust box 15 during the operation of the air filter cleaning mechanism A.

  The fan casing 36 constituting the intake / exhaust mechanism D is formed in a scroll shape, and is provided with a dust guide case 42 provided with a mouth body to which the connection hose 41 is connected at a part of the peripheral surface. Therefore, the air filter guide path 32 is formed by the dust guide case 42 and the connection hose 41.

As shown in FIG. 6, a part of the dust guide case 42 protrudes as a damper case 43, and a wind damper that is the opening / closing mechanism 34 of the air filter guide path 32 is provided in the damper case 43.
The wind damper 34 is a plate piece that is bent into a generally U shape when viewed from the side, and the damper case 43 is formed so as to project to match the shape of the wind damper 34. One end of the wind damper 34 is rotatably supported by a dust guide case 42 via a support shaft, and the other end of the wind damper 34 hangs down due to gravity to block the inside of the dust guide case 42.

  When a wind pressure (negative pressure) equal to or higher than a predetermined pressure is applied to the connection hose 41, the free end of the wind damper 34 is pushed upward by the wind pressure, and the air filter guide path 32 is opened. If the wind pressure of a predetermined pressure or more disappears from this state, or if positive pressure is applied, the wind damper 34 blocks the air filter guide path 32.

As shown in FIGS. 7 and 8, the intake / exhaust mechanism D is provided with a unit base 45 on one side and a blower mechanism 50 having the fan casing 36 on the other side. Between the blower mechanism 50, a ventilation damper and a damper drive mechanism 55 which are opening / closing mechanisms 35 of the fan guide path 33 are interposed. (Here, the dust guiding case 42 is omitted)
The upper part of the unit base 45 matches the combined shape of the front heat exchanger part 10A and the rear heat exchanger part 10B constituting the heat exchanger 10, and the side end part of the heat exchanger 10 is placed thereon. A mounting opening 46 is provided at a substantially central portion of the unit base 45 so that a rib f protrudes along the periphery. A plurality of full-closing pieces 47 are provided along a substantially half circumference of the mounting opening 46 at predetermined intervals, and a secondary ventilation port 48 is provided between some of the full-closing pieces 47. Is opened.

  A bearing tool 49 is fitted and fixed to the mounting opening 46, and pivotally supports a support shaft 22 b of the cross-flow fan 21 constituting the indoor blower 20. A small gear 56 constituting a damper drive mechanism 55 is rotatably fitted to two stays g protruding from the inner surface side. A mounting screw 51 for mounting and fixing the blower mechanism 50 is screwed into an end surface screw hole of another stay h.

  The unit base 45 is provided with a driving motor 57 that constitutes a damper driving mechanism 55, and is provided with a receiving portion 59 that rotatably supports a driving gear 58 that is coupled to the rotating shaft of the driving motor 57.

  A hole 60 provided at the center of the ventilation damper 35 is rotatably fitted into a rib f formed along the peripheral surface of the mounting opening 46. The ventilation damper 35 is formed in a substantially dish-shaped cross section along the radial direction from the hole 60, and a gear portion G is provided along a circular outer peripheral edge. The gear portion G meshes with two small gears 56 and a drive gear 58 that constitute the damper drive mechanism 55.

  Between the hole portion 60 and the outer peripheral gear portion G in the ventilation damper 35, a plurality of guide ventilation ports 62 are provided in a part in the circumferential direction. The guide vents 62 have the same opening size and shape as the secondary vents 48 of the unit base 45, and the guide vents 62 have the same spacing as the full-close piece 47. Is set.

  When the ventilation damper 35 is fitted in the rib f, there is a gap with the inner surface of the unit base 45, and one side surface of the ventilation damper 35 is always in sliding contact with the edge of the full-closing piece 47. Accordingly, each secondary ventilation port 48 is closed by the ventilation damper 35 except for the state where the guide ventilation port 62 of the ventilation damper 35 is opposed to the secondary ventilation port 48.

  The blower mechanism 50 includes an intake port 63 that opens to the side surface on the ventilation damper 35 side, the fan casing 36 that has an exhaust port body 64 protruding from a peripheral end thereof, and the intake port 63 of the fan casing 36. The fan motor 65 is mounted on the opposite surface, and the ventilation fan 38 is mounted on the rotation shaft of the fan motor 65.

  The ventilation fan 38 is a so-called centrifugal fan type (multi-blade type) in which air is sucked from the axial direction along with rotation and blown in the circumferential direction. Actually, air is sucked from the air inlet 63 of the fan casing 36 and blown to the air outlet 64. 4 is connected to the exhaust port body 64, and the exhaust duct 39 extends through the wall K to the outside as described above.

  The indoor unit of the air conditioner configured as described above, when the operation switch of the remote control is turned on, the movable panel P opens the front suction port 4 and according to the designation of the cooling operation and the heating operation. The blowout louver 8 provided in the blowout opening 7 rotates to set the wind direction posture. At the same time, the indoor blower 20 performs a blowing action, while the compressor of the outdoor unit is driven to start the refrigeration cycle operation.

  The room air is guided from the front suction port 4 and the upper suction port 5 along the air passage 28 formed in the indoor unit body 1. That is, room air passes through the front air filter 11A and the upper air filter 11B, and dust contained in the room air is captured. Further, the indoor air purified by circulating through the air purification unit C is guided to the heat exchanger 10 to perform a heat exchange action. This heat exchange air is guided from the blow-out air passage 27 to the blow-out port 7, guided by the blow-out louver 8 and blown into the room, and efficient air-conditioning operation can be continued.

  If the air-conditioning operation is continued for a long period of time, the dust trapped from the room air inevitably accumulates in the upper air filters 11A and 11B, and the dust that has passed through the air filters 11A and 11B and the heat exchanger 10 is transferred to the indoor fan. It adheres to the crossflow fan 21 constituting 20 under the influence of static electricity.

  Therefore, the control unit S sends an operation start signal to the air filter cleaning mechanism A and the fan cleaning mechanism B every time the air conditioning operation ends or after a predetermined cumulative air conditioning operation time has elapsed. Or you may set so that an operation start signal can be sent to each cleaning mechanism A and B from the control part S by a user pushing the cleaning switch of a remote control arbitrarily.

  The control unit S sends a signal to the drive mechanism of the movable panel P to close the front suction port 4 and sends a signal to the drive mechanism of the blowout louver 8 to close the blowout port 7. That is, the indoor unit main body 1 is made to have a substantially sealed structure in advance to prevent the collected dust from leaking as much as possible. An operation start signal is sent to the air filter cleaning mechanism A at the timing after completion of the closing.

  As shown in FIG. 1, the dust box 15 constituting the air filter cleaning mechanism A has a front panel 2 portion between the upper end of the front suction port 4 and the front end of the upper suction port 5 as shown in FIG. Since it exists in the position which opposes, the distribution | circulation of the indoor air suck | inhaled in the main body 1 from the front suction inlet 4 and the upper suction inlet 5 does not become an obstacle especially in an air conditioning driving | operation.

  When an operation start signal is sent to the air filter cleaning mechanism A, the pinion gear is driven, the dust box 15 is guided by the main guide 12 and the sub guide 13, and moves along the front side of the front air filter 11A. At the same time, the brush drive mechanism rotationally drives the roll brush 16 in the dust box 15, and the hair tip contacts the front air filter 11A. Dust adhering to the front air filter 11 </ b> A is scraped off by the roll brush 16 and received in the dust receiving passage 17 in the dust box 15.

When the dust box 15 moves from the upper end to the lower end of the front air filter 11A, this time the dust box 15 moves from the lower end to the upper end to remove the dust remaining on the front air filter 11A. Thereafter, the dust box 15 moves from the front end to the rear end of the upper air filter 11B to remove the adhering dust, returns to the front end position of the upper air filter 11B again, removes the dust, and then performs the cleaning action. Stop.

  Both the front air filter 11A and the upper air filter 11B are subjected to dust removal work twice, and the cleaning effect becomes perfect. Since dust removed from the air filters 11A and 11B is collected in the dust receiving passage 17 of the dust box 15, the control unit S sends an operation end signal to the air filter cleaning mechanism A and then operates to the intake / exhaust mechanism D. A signal is sent and the collected dust is discharged outdoors.

  The intake / exhaust mechanism D can be switched to three types of modes: “secondary air ventilation mode”, “primary air ventilation mode”, and “damper fully closed mode”. Here, the designation of the secondary side and the primary side is based on the heat exchanger 10 here, and the secondary side air means the air after flowing through the heat exchanger 10, and the primary side air is heat exchange. The air before flowing into the vessel 10.

  When the intake / exhaust mechanism D is operated, the control unit S selects the “damper fully closed mode”. The ventilation damper 35 is rotated, and the guide ventilation port 62 is surrounded by the full-closing piece 47 and the rib f of the unit base 45 to be in a completely closed state. Further, the secondary ventilation port 48 of the unit base 45 is completely closed by the surface of the ventilation damper 35, and the intake port 63 of the fan casing 36 is closed. That is, the ventilation damper 35, which is an opening / closing mechanism, closes the dust inlet 37, and thus closes the fan guide path 33.

  Next, when the ventilation mechanism 50 is actuated to rotationally drive the ventilation fan 38, the inside of the fan casing 36 is in a negative pressure state. Due to this influence, the damper case 43 is also in a negative pressure state, and the wind damper 34 as an opening / closing mechanism opens the air filter guide path 32.

  Negative pressure is also applied to the dust receiving passage 17 in the dust box 15 via the air filter guide path 32, and the dust collected here is guided from the air filter guide path 32 into the fan casing 36, Further, it is discharged to the outside through the exhaust duct 39. When the ventilation damper 35 closes the fan guide path 33, the wind damper 34 opens the air filter guide path 32.

  After the dust collected by the air filter cleaning mechanism A is discharged to the outside, the control unit S sends a work start signal to the fan cleaning mechanism B, and the intake / exhaust mechanism D is switched to “secondary air ventilation mode”. Send. The forward / backward drive mechanism that constitutes the fan cleaning mechanism B moves the cleaning tool 30 forward to bring the brush tip into contact with the cross-flow fan 31.

In addition, the control unit S operates the cross flow fan 31 at a low speed. That is, the cross flow fan 31 is driven to rotate forward during the air conditioning operation, and the cross flow fan 31 is driven to rotate reversely during the operation of the fan cleaning mechanism B, or the forward rotation drive and the reverse rotation drive are repeated.
As shown in FIG. 8, the hair tip of the brush cleaning tool 30 comes into sliding contact with the rotation of the cross flow fan 31, and dust attached to the cross flow fan 31 is removed. At the same time, the damper drive mechanism 55 in the intake / exhaust mechanism D is operated to rotate the ventilation damper 35, and the guide ventilation port 62 of the ventilation damper 35 and the secondary ventilation port 48 of the unit base 45 face each other.

That is, the dust inlet 37 of the intake / exhaust mechanism D is opened, and the dust inlet 37 and the dust collection opening 25 of the crossflow fan 31 are the gap between the unit base 45 and the end plate 22 of the crossflow fan 31. It faces through the fan guide path 33.
The indoor air is sucked into the indoor unit body 1 from the upper suction port 5 that is always open by the low-speed rotation of the cross-flow fan 31 and flows through the heat exchanger 10. The secondary air flowing out of the heat exchanger 10 is sucked into the intake / exhaust mechanism D through the secondary ventilation port 48, the guide ventilation port 62 and the intake port 63 by the operation of the ventilation fan 38.

  At the same time, negative pressure is applied from the dust introduction port 37 to the dust collection opening 25 of the cross flow fan 31 through the fan guide path 33. Dust scraped off from the cross flow fan 31 is guided to the fan guide path 33 from the dust collection opening 25 and merges with the secondary side air at the dust introduction port 37 to be introduced into the intake / exhaust mechanism D. Then, dust together with the secondary side air is discharged to the outside through the exhaust duct 39.

  In this way, when the ventilation damper 35 opens the fan guide path 33, the wind damper 34 closes the air filter guide path 32. The fan guide path 33 is formed by a gap between the end of the cross flow fan 31 and the unit base 45, and there is no connection hose 41 like the air filter guide path 32, but the distance is short and dust collection is performed. Since the negative pressure with respect to the opening portion 25 is large, the dust is discharged without difficulty.

  The intake / exhaust mechanism D can also select a “primary air ventilation mode”. At this time, the position of the guide ventilation port 62 of the ventilation damper 35 is shifted from the position of the secondary ventilation port 48 of the unit base 45, and the surface of the damper 35 is brought into contact with the edge of the fully closed piece 47 of the unit base 45. The secondary ventilation port 48 is closed by the ventilation damper 35. Accordingly, a gap is formed between the circumferential surface of the blower mechanism 50 and the inner surface of the unit base 45, and the guide vent 62 communicates with the gap to guide the primary air.

  However, since the secondary ventilation port 48 constituting the dust introduction port 37 is closed, it is difficult to apply a negative pressure to the dust collection opening 25 of the cross flow fan 31 even if the ventilation fan 38 is driven. It becomes difficult to suck dust into the intake / exhaust mechanism D. Therefore, when the intake / exhaust mechanism D selects the “primary air ventilation mode”, the fan cleaning mechanism B is not interlocked.

  In the “secondary air ventilation mode” and the “primary air ventilation mode”, the air pressure is applied to the damper case 43 from the fan casing 36 that constitutes the air blowing mechanism 50, so that the damper case 43 is provided. The wind damper 34 prevents airflow from flowing to the connection hose 41 side. Therefore, there is no backflow of airflow from the connection hose 41 to the dust box 15.

  As described above, in the present invention, the front air filters 11A and 11B and the cross-flow fan 21 of the indoor blower 20 are brought into contact with each other to automatically remove dust adhering to them, so that it is not necessary to use a cleaning liquid. The time and effort for cleaning the air filters 11A and 11B and the fan 21 can be reduced, and the cleanliness inside the indoor unit body 1 can be improved.

  The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the components 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 sectional drawing of the air conditioner indoor unit based on one embodiment in this invention. The front perspective view inside an indoor unit main body based on the embodiment. The schematic block diagram of the crossflow fan based on the embodiment. The figure explaining the flow of dust at the time of the effect | action of the air filter cleaning mechanism and fan cleaning mechanism based on the embodiment. The external appearance perspective view of a part of air filter cleaning mechanism and intake / exhaust mechanism based on the embodiment. The perspective view which expanded a part of intake-exhaust mechanism based on the embodiment. The perspective view which decomposed | disassembled the component of the intake / exhaust mechanism based on the embodiment. Action | operation explanatory drawing of the intake / exhaust mechanism based on the embodiment.

Explanation of symbols

  4, 5 (front, upper) suction port, 7 ... outlet, 1 ... indoor unit main body, 28 ... air passage, 11A ... front air filter, 11B ... upper air filter, 10 ... heat exchanger, 20 ... Blower, A ... Air filter cleaning mechanism, B ... Fan cleaning mechanism, D ... Intake / exhaust mechanism, 37 ... Dust inlet, 30 ... Cleaning tool (rotary brush), 22 ... End plate, 23 ... Intermediate partition plate, 24 ... Blade , 21 ... Cross-flow fan, 25 ... Dust collection opening.

Claims (2)

An indoor unit body equipped with a room air inlet and a heat exchange air outlet;
A blower passage formed in the indoor unit main body and communicating the suction port and the blowout port,
An air filter, a heat exchanger and a cross flow fan arranged along the air passage;
A fan cleaning mechanism that contacts the crossflow fan and removes dust adhering to the crossflow fan as the crossflow fan rotates;
A dust inlet that is adjacent to the side of the cross-flow fan and communicates with the fan cleaning mechanism is formed facing the side surface of the cross-flow fan, and dust removed by the fan cleaning mechanism is sucked together with air from the dust inlet. An air conditioner indoor unit comprising an intake / exhaust mechanism that exhausts the air to the outside. The cross-flow fan includes both side end plates and an intermediate partition plate made of discs provided at predetermined intervals in the axial direction, and a plurality of blades installed between the both side end plates and the intermediate partition plate. With
2. An air conditioner according to claim 1, wherein a dust collection opening for guiding the dust scraped off by the fan cleaning mechanism is provided at both side end plates of the cross flow fan and the shaft core of the intermediate partition plate. Indoor unit.

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