JP2010065897A - Indoor unit of air conditioning device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an indoor unit miniaturized without degrading heat exchanging performance of an indoor-side heat exchanger, in the indoor unit including an air supply duct. <P>SOLUTION: A suction opening 6 is formed at an upper part with respect to a region overlapped to a cross flow fan 40 in a front view of a body casing 5. An opening section 55 of the humidification duct 20 is formed on a position opposed to a lower section of the indoor-side heat exchanger 36, that is, a lower front face-side heat exchanger 36ab. As the opening section 55 of the humidification duct 20 is opposed to the lower section of the indoor-side heat exchanger 36 positioned outside of strong flow of the indoor air from the suction opening 6 to the cross flow fan 40, a region of the indoor-side heat exchanger 36 not activated much in exchanging heat of the indoor air, is utilized, and its circumferential space is effectively used, thus the indoor unit is miniaturized. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an indoor unit of an air conditioner, and more particularly to an indoor unit of an air conditioner including a mechanism for cleaning an air filter.

  The indoor unit of the air conditioner includes an indoor heat exchanger in the main body casing. The indoor unit sucks room air into the main body casing by a blower fan, and blows it out of the main body casing through the indoor heat exchanger. In the indoor heat exchanger, the air is conditioned by heating or cooling the indoor air, so if dust is included in the sucked indoor air, the dust adheres to the heat exchanger and the blower fan, It may cause a decrease in heat exchange capacity and equipment failure. Therefore, an air filter is attached to the air suction port of the air conditioner in order to prevent intrusion of dust contained in the sucked air (Patent Document 1 and Patent Document 2).

In addition, the indoor unit may be provided with an air supply duct such as a humidification duct in order to take in moisture from the outside air that cannot be supplemented by room air for the purpose of humidification. Since the outside air is different from the air after air conditioning, heat exchange by the indoor heat exchanger is required as in the case of room air.
JP 2002-98367 A JP 2002-98368 A

  In an indoor unit including the above air supply duct, an opening of the air supply duct is provided on the downstream side of the suction port with respect to the outside air supplied by the air supply duct, and air conditioning is performed together with the room air. . For this reason, the air supply duct becomes a draft resistance and the performance of the indoor heat exchanger cannot be improved, or the indoor unit tends to be enlarged in order to give priority to improving the performance of the indoor heat exchanger. is there.

  The subject of this invention is providing the indoor unit reduced in size, without reducing the heat exchange performance of an indoor side heat exchanger in an indoor unit provided with an air supply duct.

  The indoor unit of the air conditioner according to the first aspect of the present invention includes a main body, an air supply duct, an indoor heat exchanger, and a blower fan. The main body has a suction port and a blower outlet disposed below the suction port. The air supply duct is disposed between the air outlet and the air inlet and has an opening for supplying air to the ventilation path extending from the air inlet to the air outlet. The indoor heat exchanger is disposed on the downstream side of the suction port. The blower fan is disposed on the downstream side of the indoor heat exchanger so as to come out above the air supply duct in a front view. The suction port is provided above a region overlapping with the blower fan in a front view among all the regions except the back surface of the main body. Moreover, the opening part of an air supply duct is arrange | positioned in the position facing the lower part of an indoor side heat exchanger.

  According to the present invention, since the suction port is provided above the region overlapping the blower fan in front view, the lower part of the indoor heat exchanger facing the opening of the air supply duct is connected to the blower fan from the suction port. It will be located outside the strong flow of indoor air to. Since outside air is supplied to the lower part of such an indoor heat exchanger from the opening of the air supply duct, heat exchange with the outside air is performed using the lower part of the indoor heat exchanger that is not often used for heat exchange of the indoor air. Can be performed. Therefore, it is possible to reduce the size of the indoor unit without degrading the heat exchange performance.

  An indoor unit of an air conditioner according to a second aspect of the present invention is the indoor unit of the air conditioner of the first aspect of the present invention, and further includes a first air filter that collects dust from the indoor air sucked from the suction port. . The first air filter is disposed on the downstream side of the suction port. The air supply duct has a detachable second air filter.

  According to the present invention, since the dust from the outside air can be removed by the second air filter, the dust from the air supply can be removed without extending the first air filter to the opening of the air supply duct. Easy and easy to clean.

  An indoor unit of an air conditioner according to a third aspect of the present invention is the indoor unit of the air conditioner of the second aspect of the present invention, and further includes a dust box for storing the dust removed from the first air filter. This dust box is disposed above the air supply duct.

  According to the present invention, since the distance from the suction port to the air supply duct can be increased by providing the dust box, the area of the indoor heat exchanger can be increased by the height of the dust box. It can suppress that the performance of air conditioning falls by the increase in the quantity of the gas of the heat exchange object by air. Further, it becomes easier to separate the indoor air flow path and the supplied gas flow path by the height of the dust box.

  An indoor unit of an air conditioner according to a fourth aspect of the present invention is the indoor unit of the air conditioner of the first aspect, wherein the first air filter that collects dust from the indoor air sucked from the suction port, and the first air And a filter cleaning mechanism for cleaning dust adhering to the filter. The first air filter is disposed on the downstream side of the suction port, and the filter cleaning mechanism is disposed above the air supply duct.

  According to the present invention, by providing the filter cleaning mechanism in the space above the air supply duct caused by the thickness of the air supply duct, the space generated by the thickness of the air supply duct can be utilized to accommodate the filter cleaning mechanism, The indoor unit having the filter cleaning mechanism can be reduced in size.

  An indoor unit of an air conditioner according to a fifth aspect of the present invention is the indoor unit of the air conditioner according to any one of the first to fourth aspects of the invention, wherein the air conditioner overlaps with the air supply duct in a side view on the side of the air supply duct. And an electrical component box arranged side by side.

  According to the present invention, the air supply duct and the electrical component box are arranged side by side by using the space generated in the width direction of the indoor unit by providing the air supply duct, so that it is higher than the region overlapping the blower fan in the front view. By providing the suction port, the size of the suction port can be limited by expanding the suction port and the indoor heat exchanger to the side where the electrical component box has disappeared. As a result, it is possible to reduce the size of the indoor unit without reducing the performance of heat exchange.

  An indoor unit of an air conditioner according to a sixth aspect of the present invention is the indoor unit of the air conditioner according to any one of the first to fifth aspects of the present invention, and the suction port is provided only on the top surface.

  According to the present invention, the suction port is provided only on the top surface, and the flow of the indoor air sucked from the suction port is directed downward. Therefore, the air supply duct does not increase the ventilation resistance of the room air, and the air supply duct is It is possible to prevent the air from being disturbed and adversely affecting the heat exchange of the room air.

  In addition, the suction port provided in the top | upper surface in this invention means what is provided in the surface above the upper end of a ventilation fan.

  In the indoor unit of the air conditioner according to the first aspect of the present invention, the suction port is provided above a region overlapping the blower fan when viewed from the front, and the opening of the air supply duct is positioned opposite the lower portion of the indoor heat exchanger. Since it arrange | positions, size reduction of an indoor unit can be achieved, suppressing the fall of the performance of heat exchange.

  In the indoor unit of the air conditioner according to the second aspect of the present invention, the second air filter facilitates further miniaturization and can save the maintenance work when the second air filter is provided.

  In the indoor unit of the air conditioner according to the third aspect of the present invention, by disposing the dust box above the air supply duct, it is possible to suppress a decrease in heat exchange performance due to the provision of the air supply duct.

  In the indoor unit of the air conditioner according to the fourth aspect of the present invention, the filter cleaning mechanism is disposed above the air supply duct, so that the indoor unit including the filter cleaning mechanism can be downsized.

  In the indoor unit of the air conditioner according to the fifth aspect of the present invention, the electrical component box is arranged side by side at a position overlapping the air supply duct in a side view, and thus can be further reduced in size.

  In the indoor unit of the air conditioner according to the sixth aspect of the present invention, since the air supply duct does not interfere with ventilation, a reduction in heat exchange performance associated with downsizing can be suppressed.

  An embodiment of the present invention will be described below with reference to the drawings. The following embodiments are specific examples of the present invention and do not limit the technical scope of the present invention.

<Outline of configuration of air conditioner>
FIG. 1 is a schematic diagram illustrating an overall configuration of an air conditioner including an indoor unit according to an embodiment of the present invention. The air conditioner 1 includes an indoor unit 2 attached to an indoor wall and an outdoor unit 3 installed outside the room. The indoor unit 2 and the outdoor unit 3 are connected to each other by a collective connecting pipe 4 that collects refrigerant pipes, humidification hoses, transmission lines, communication lines, and the like. Looking at the air conditioner 1 from the aspect of heat exchange, for example, the indoor side heat exchanger of the indoor unit 2 (evaporator at the time of cooling / condenser at the time of heating) and the compressor of the outdoor unit 3 and the outdoor heat exchange. A refrigerant (condenser during cooling / evaporator during heating) and an expansion valve are connected by a refrigerant pipe passing through the assembly connecting pipe 4 to constitute a refrigerant circuit. On the other hand, when the air conditioner 1 is viewed from the control aspect, the indoor unit 2 is provided with an electrical component box for receiving a command from a control terminal such as a remote controller and controlling indoor equipment such as a fan motor of the indoor unit 2. The outdoor unit 3 is provided with an electrical component box for controlling outdoor equipment such as a fan motor of the outdoor unit 3. The electrical component box of the indoor unit 2 and the electrical component box of the outdoor unit 3 are connected by a transmission line passing through the collective connecting pipe 4.

<Configuration of indoor unit of air conditioner>
(Front configuration of indoor unit)
FIG. 2 is a front view of the indoor unit of the air conditioner according to the embodiment of the present invention. The indoor unit 2 includes a suction port 6 in the upper part of the main body casing 5 and a blower outlet 7 in the lower part, and the front surface is covered with a front panel 8. Therefore, the indoor air is not sucked from the front, and the indoor unit 2 sucks indoor air exclusively from the upper part of the main body casing 5, and the indoor air is circulated from the top surface 5 a side of the indoor unit 2. This is performed toward the bottom surface 5c side of the. The air outlet 7 is provided with two wind direction adjusting blades 9 that are closed when the operation is stopped and opened during the operation. The wind direction adjusting blade 9 adjusts the vertical wind direction of the indoor unit 2. FIG. 2 shows a state where the operation is stopped, and shows a state where the opening of the air outlet 7 is closed by the wind direction adjusting blade 9. The front panel 8 is attached to the main casing 5 so as to be rotatable about a fulcrum near the panel upper portion 8a.

  Display LEDs 10 are arranged along the upper side of the air outlet 7 immediately below the front panel 5, and a receiving unit 11 and the like are provided. As described above, the display function and the sensing function necessary for the control are arranged in a substantially central portion in the width direction of the indoor unit 2. Electrical components such as the display LED 10 are connected to an electrical component box described later.

  FIG. 3 is a perspective view showing a state when viewed from the upper right (C direction) from the front, with the front panel 8 of the indoor unit of FIG. 2 removed. FIG. 4 is a perspective view showing a state viewed obliquely from the lower right (D direction) from the front with the front panel of the indoor unit of FIG. 2 removed. As shown in FIGS. 3 and 4, the top surface 5 a, the front surface 5 b, the bottom surface 5 c, and the side surface 5 e of the indoor unit 2 are covered with a plastic front grill 12 that forms part of the main body casing 5. A display panel 13 is provided at the front portion of the front grill 12 that hits the back side of the front panel 8. Although the display panel 13 is connected to the electrical component box, the electrical component box is arranged behind the display panel 13 and therefore hidden behind the front grill 12 and does not appear in FIGS. 3 and 4. The display on the display panel 13 is visible to the user operating the indoor unit 2 from the front side through the front panel 8 with the display panel 13 covered with the front panel 8.

  A filter cleaning member 14 that is elongated in the width direction of the indoor unit 2 is disposed above the display panel 13, in other words, directly above the electrical component box. The filter cleaning member 14 holds a brush described later, and cleans the air filter by scraping off dust adhering to the air filter described later with the brush. 3 and 4 show a state where the air filter is removed.

  A filter cleaning mechanism 15 that holds the air filter and drives the air filter for cleaning is disposed on the filter cleaning member 14. The air filter is held between the arms 17 constituting the frame 16 of the filter cleaning mechanism 15. The filter cleaning mechanism 15 is exposed at the openings 19a and 19b of the main casing 5, and is configured so that the air filter can be replaced with the front panel 8 opened. The filter cleaning member 14 is detachably fixed to the frame 16 of the filter cleaning mechanism 15 by slide type lock members 18a, 18b, 18c, 18d. During maintenance, the filter cleaning member 14 and the filter cleaning mechanism 15 are fixed to the frame 16 by the lock members 18a, 18b, 18c, and 18d, and the filter cleaning member 14 is pulled out to the front surface 5a side of the main body casing 5. It is configured to be able to. In relation to the main body casing 5, the filter cleaning member 14 is only placed in the recess of the main body casing 5 and is not fixed to the main body casing 5. The lock members 18a, 18b, 18c, and 18d are set to be locked when slid toward the center of the indoor unit 2 and unlocked when slid toward the side. Therefore, in FIG. 3, the lock members 18a and 18c are in a locked state, and the lock members 18b and 18d are in a released state.

  A humidifying duct 20 is formed side by side with the filter cleaning member 14 on the left side of the main casing 5 as viewed from the front. In FIG. 4, the filter case 21 of the humidification duct 20 is visible.

(Main body casing structure)
Next, the front grille of the main body casing will be described with reference to FIGS. FIG. 5 is a front view of a front grille constituting a part of the main body casing, FIG. 6 is a plan view of the front grille, and FIG. 7 is a side view of the front grille. As already described, the front panel 8 is attached to the front surface 5 b of the main body casing 5. At the front of the front grill 12, there are two openings 19a, 19b for maintenance of an air filter (described later). Since the decorative portion 25 in which striped irregularities are arranged is formed at a position lowering from the front portion of the front grill 12 to the back side, even if the front panel 8 is attached to the front grill 12, the openings 19a, 19b The upper portion is not blocked by the front panel 8, and the upper portions of the openings 19a and 19b serve as the sub suction port 6b. A main suction port 6 a is formed in the top surface 5 a of the front grill 12. The sub suction port 6b is formed at a position lower than the main suction port 6a by one step. However, the sub suction port 6b is provided above the indoor unit 2 and functionally, the sub suction port 6b is also the main suction port. It can be said that it is equivalent to the mouth 6a and is provided on the top surface 5a. In addition, although the suction port provided in the top surface in this invention means what is provided in the surface above the upper end of the ventilation fan (cross flow fan) mentioned later, as demonstrated above, an opening part is. A thing like the suction inlets 6a and 6b opened toward the ceiling is preferable.

  A beam 26 is passed to the main suction port 6a. In addition to reinforcing the rigidity of the front grille 12, the beam 26 extending in the front-rear direction also has a function of holding the air filter by pressing the support frame of the air filter located below the main suction port 6a. The air filter has a rectangular shape slightly shorter than the lateral width of the openings 19a and 19b. However, there is a frame 16 of the filter cleaning mechanism 15 between the air filter and the main body casing 5, and the air filter. And the main casing 5 are closed. Therefore, all the indoor air sucked from the main suction port 6a and the sub suction port 6b passes through the air filter.

  A recess 27 is formed below the openings 19 a and 19 b of the front grill 12. The filter cleaning member 14 is fitted into the recess 27 as described above. By the way, since only the filter cleaning member 14 is placed in the recess 27, the vibration of the front grill 12 is hardly transmitted from the front grill 12 to the filter cleaning member 14. The filter cleaning member 14 includes a brush side member to which a brush is attached and a dust box in which dust scraped off by the brush is placed. The configuration thereof will be described later. An opening 28 is formed in the recess 27. The filter cleaning mechanism 15 and the filter cleaning member 14 are connected through the opening 28. Further, in the opening portion 28, the driving gear of the filter cleaning mechanism 15 and the driven gear of the filter cleaning member 14 are engaged with each other, and the driving force is transmitted from the filter cleaning mechanism 15 to the filter cleaning member 14. Then, the brush is rotated together with the driven gear of the filter cleaning member 14. The screw hole 29 in the recess 27 is for fixing the filter cleaning mechanism 15 to the front grill 12 with screws.

  An opening 30 into which the display panel 13 shown in FIGS. 3 and 4 is fitted is formed under the concave portion 27 of the front grill 12, and the control part such as the display LED 10 is provided under the opening 30. A plurality of windows 31 are formed side by side in the width direction. An opening 32 constituting the air outlet 7 is formed below the opening 30 and the window 31. In addition, an outlet 33 for the filter cassette 21 of the humidifying duct 20 is provided on the left side of the front side of the opening 30 at the same height as the opening 30.

(Vertical cross-sectional structure of indoor unit)
FIG. 8 is a diagram showing an outline of a cross section of the indoor unit along line AA in FIG. 2, and FIG. 9 is a diagram showing an outline of a cross section of the indoor unit along line BB in FIG. 2. As shown in FIGS. 8 and 9, two sheets are provided on the top surface 5a of the main casing 5 on the downstream side of the main suction port 6a and the sub suction port 6b so as to face the entire surfaces of the main suction port 6a and the sub suction port 6b. Air filters 35a and 35b are arranged. The air filter 35a shown in FIG. 8 shares the left half of the main body casing 5 in the width direction, and the air filter 35b shown in FIG. 9 shares the right half of the main body casing 5 in the width direction. An indoor heat exchanger 36 is disposed further downstream of the air filters 35a and 35b. All of the room air that passes through the suction port 6 and reaches the indoor heat exchanger 36 passes through the air filters 35a and 35b and is subjected to dust removal.

  The indoor side heat exchanger 36 is configured by connecting a front side heat exchanger 36a and a back side heat exchanger 36b so as to form an inverted V shape in a side view. In a plan view seen from the top surface 5a, the front-side heat exchanger 36a is arranged at a position facing the front half of the main suction port 6a, and the rear-side heat exchanger 36b is arranged at a position facing the rear half. Has been. For this reason, when viewed as a whole of the suction port 6 including the sub suction port 6 b, the connecting portion between the front side heat exchanger 36 a and the back side heat exchanger 36 b is close to the back surface 5 d of the indoor unit 2. The front side heat exchanger 36a includes an upper front side heat exchanger 36aa and a lower front side heat exchanger 36ab. The front-side heat exchanger 36a extends from the vicinity of the air filters 35a and 35b directly below the main suction port 6a to the vicinity of the upper wall 7aa of the blowout passage 7a of the blowout port 7 and blows from the vicinity of the air filters 35a and 35b. There is an upper front heat exchanger 36aa in the upper part that occupies the upper half of the outlet passage 7a up to the vicinity of the upper wall 7aa, and a lower front heat exchanger 36ab in the lower part that occupies the lower half. Both the front-side heat exchanger 36 a and the rear-side heat exchanger 36 b are configured by arranging a large number of plate fins 37 in parallel with the width direction of the indoor unit 2 on the heat exchange pipe 38. When the indoor air sucked from the suction port 6 and passed through the air filters 35a and 35b passes between the plate fins 37, heat exchange occurs and air conditioning is performed. Therefore, in the vicinity of the plate fins 37, the indoor air easily generates a flow parallel to the surface of the plate fins 37 and hardly generates a flow in a direction perpendicular to the surface.

  An auxiliary heat exchanger 39 is provided upstream of the indoor heat exchanger 36 and adjacent to the front heat exchanger 36a. The auxiliary heat exchanger 39 is provided above the humidification duct 20 so as not to overlap the humidification duct 20 shown in FIG. Thereby, the way of the air conditioning of the humidified air supplied from the humidification duct 20 and room air can be varied. The auxiliary heat exchanger 39 can be switched by the first electromagnetic valve provided in the indoor unit 2 to function as a condenser or an evaporator. During the reheat dehumidifying operation, the auxiliary heat exchanger 39 is used as a condenser, while the indoor heat exchanger 36 is used as an evaporator to perform dehumidification while preventing a decrease in temperature. Further, when the auxiliary heat exchanger 39 is used as an evaporator like the indoor heat exchanger 36, the area contributing to heat exchange can be increased.

  Since the refrigerant is supplied in parallel to the indoor heat exchanger 36 and the auxiliary heat exchanger 39 through the heat exchange pipe 38, the amount of refrigerant flowing to the indoor heat exchanger 36 and the auxiliary heat exchanger 39 by the second electromagnetic valve. Can be different at the top and bottom. Thus, when sufficient air conditioning can be achieved even if the function of the lower part of the indoor heat exchanger 36 is reduced, heat can be efficiently exchanged using the upper part of the indoor heat exchanger 36. In addition, the first electromagnetic valve and the second electromagnetic valve can selectively use the indoor-side heat exchanger 36 and the auxiliary heat exchanger 39 in accordance with the combination of whether or not the humidifying duct 20 is used. Driving becomes possible. In addition, the 1st and 2nd solenoid valve 85 is arrange | positioned at the side of the indoor unit 2 (refer FIG. 21).

  On the downstream side of the indoor side heat exchanger 36, a substantially cylindrical cross flow fan 40 extends long along the width direction of the main body casing 5, and is provided in parallel with the width direction of the main body casing 5 together with the indoor side heat exchanger 36. It has been. The cross flow fan 40 is surrounded so as to be sandwiched between the inverted V-shaped indoor heat exchangers 36. The cross flow fan 40 is disposed at a position overlapping the front side heat exchanger 36a and the back side heat exchanger 36b at the same rate in a plan view as viewed from the top surface 5a of the main body casing 5, and is viewed from the front surface 5b. In view, it is disposed at a position overlapping with a part of the lower side of the upper front side heat exchanger 36aa and the lower front side heat exchanger 36ab. Moreover, the cross flow fan 40 is arrange | positioned so that it may protrude above the humidification duct 20 in front view. The cross flow fan 40 rotates clockwise in FIGS. 8 and 9 to generate an air flow.

  The blowout passage 7a downstream of the cross flow fan 40 is configured with a scroll member 41 on the back side. The scroll member 41 has substantially the same width as the opening 32 of the air outlet 7 of the main casing 5 in a front view. The upper end of the scroll member 41 is located above the upper end of the cross flow fan 40 and starts from a position shifted to the back side from the central axis of the cylindrical cross flow fan 40 in a side view. The lower end of the scroll member 41 is connected to the opening 32 of the air outlet 7. The guide surface 41 a of the scroll member 41 has a smooth curved shape having a center of curvature on the cross flow fan 40 side in a cross-sectional view, and the upper portion of the guide surface 41 a is disposed in the vicinity closest to the cross flow fan 40. It is arranged so as to gradually move away from the cross flow fan 40 as it goes down. At the upper end of the upper wall 7aa of the blowout passage 7a, a tongue portion 42 having a surface having a square cross section is provided. Of the surface of the tongue portion 42, the surface 42 a provided in the vicinity of the cross flow fan 40 faces the guide surface 41 a of the scroll member 41 with the cross flow fan 40 interposed therebetween. An opening formed by the surface 42a of the tongue 42 and the guide surface 41a of the scroll member 41 faces obliquely upward to the left in the cross-sectional views of FIGS. The direction of the indoor air flow in the vicinity of the cross flow fan 40 sucked by the cross flow fan 40 depends on the opening formed by the scroll member 41 and the tongue 42. Therefore, the room air blown out from the crossflow fan 40 passes through the blowout flow path 7a and is blown out from the blowout outlet 7, but the direction of blowout is adjusted by the wind direction adjusting blades 9 and 43. The right and left blowing directions viewed from the front of the indoor unit 2 are adjusted by the wind direction adjusting blades 43 close to the cross flow fan 40, and the upper and lower blowing directions are adjusted by the wind direction adjusting blades 9 at the outlet 7.

  A drain pan 44 that receives water droplets condensed by the front heat exchanger 36 a is disposed above the upper wall 7 aa of the air outlet 7. Further, the lower end of the lower front side heat exchanger 36ab is supported by the members constituting the drain pan 44, and the drain pan 44 serves to fix the indoor side heat exchanger 36.

  As shown in FIG. 8, an electrical component box 45 is disposed on the upper wall 7aa of the air outlet 7 so as to partially contact the upper wall 7aa. The lower end of the electrical component box 45 is below the drain pan 44, but the upper end of the electrical component box 45 is above the drain pan 44, and the electrical component box 45 is in the vicinity of the drain pan 44, in other words, the lower front side heat exchanger. Located in the vicinity of 36ab. The front surface of the electrical component box 45 is disposed so as to abut along the front grill 12. The electrical component box 45 is covered with a plastic drip-proof cover 46 from the upper surface to the rear surface. The drip-proof cover 46 starts from the upper surface of the electrical component box 45 and extends into the members constituting the drain pan 44, and the dropped water droplets can be guided to the drain pan 44. A printed wiring board 45a is fixed to the back side of the electrical component box 45, and various electrical components are mounted on the printed wiring board 45a, but the electrical components are not shown.

  The filter cleaning member 14 attached to the recess 27 on the electrical component box 45 shown in FIG. 8 includes a brush side member 48 that holds the brush 47, and a dust box 49 that holds dust scraped off by the brush 47. It is configured by combining. The depth of the lower portion of the filter cleaning member 14 (length in the front-rear direction of the indoor unit 2) is substantially the same as the depth of the upper portion of the electrical component box 45. The brush 47 is formed so that plastic straight hairs extend radially, and the brush 47 rotates counterclockwise in the cross-sectional view of FIG. Comb teeth 50 are inserted obliquely forward from below the brush 47. Further, a plastic cylindrical rod-shaped member for pushing dust into the dust box 49 is provided immediately below the teeth 50 of the comb portion. Spiral projections are attached to the surface of the columnar bar-shaped member 51, and the columnar bar-shaped member 51 rotates together with the brush 47, so that the dust scattered by the comb teeth 50 can be pushed into the dust box 49. Thereby, the dust accumulated in the dust box 49 can be compressed, and the number of times the dust collected in the dust box 49 is discarded can be reduced.

  The filter cleaning mechanism 15 is mounted on the filter cleaning member 14 so that the brush 47 of the filter cleaning member 14 contacts the air filters 35a and 35b. The two filter driving rollers 52a and 52b of the filter cleaning mechanism 15 are attached at positions facing the brush 47 with the air filters 35a and 35b interposed therebetween. FIG. 8 shows one filter driving roller 52b, and FIG. 9 shows the other filter driving roller 52a. The filter driving rollers 52a and 52b have pinion gears formed at both ends thereof, and the pinion gears mesh with rack gears formed at both ends of the air filters 35a and 35b, so that the air filters 35a and 35b Move.

  The air filters 35 a and 35 b are guided by the arm 17 and the blade 53 of the filter cleaning mechanism 15. The arm 17 includes an upper guide groove 17a that draws a curved line that gently curves along the vicinity of the upper portion of the front panel 8, the decorative portion 25 provided slightly backward from the front panel 8 and the top surface 5a. And another lower guide groove 17b provided below the upper guide groove 17a. The distance between the upper guide groove 17a and the lower guide groove 17b is slightly wider than the outer diameter of the tip circle of the pinion gear of the filter driving rollers 52a and 52b. When removing dust from indoor air, the filter cleaning mechanism 15 holds the air filters 35a and 35b so as to be positioned in the upper guide groove 17a. When cleaning the air filters 35a and 35b, the filter cleaning mechanism 15 makes the air filters 35a and 35b U-turn so as to be wound around the outer periphery of the filter driving rollers 52a and 52b. By making a U-turn, the filter driving roller 52a changes the moving direction of the air filters 35a, 35b from downward to upward, and guides the air filters 35a, 35b to the lower guide groove 17b. Since the dust is scraped off by the brush 47 while making the air filters 35a and 35b U-turn, the length of the filter cleaning mechanism 15 can be shortened, while the thickness of the filter cleaning mechanism 15 is increased by the diameter of the filter driving rollers 52a and 52b. Increase.

  A humidifying duct 20 is disposed on the upper wall 7aa of the air outlet 7 as shown in FIG. As can be seen by comparing the position of the humidification duct 20 in FIG. 9 with the position of the electrical component box 45 in FIG. 8, the humidification duct 20 is disposed at a position that substantially overlaps the electrical component box 45 in a side view. The humidifying duct 20 is formed with a cavity portion 54 that serves as a flow path for humidified outside air, and a humidified outside air supply port 55 is formed above the cavity portion 54. The air supply port 55 is disposed so that a space of a predetermined length is formed between the lower front surface side heat exchanger 36ab. Thereby, the humidified air supplied from the air supply port 55 is set so as to spread in the width direction of the indoor unit 3. The hollow portion 54 is partitioned by the prefilter 21, and all the outside air supplied from the air supply port 55 to the inside of the main body casing 5 passes through the prefilter 21. Therefore, it is not necessary to arrange the air filters 35a and 35b in front of the air supply port 55, and the arrangement area of the air filters 35a and 35b can be narrowed. The pre-filter 21 is configured to be detachable from the lower side of the front surface 5a of the indoor unit 2 toward the upper side of the back side.

(Positional relationship between inlet and tongue)
Next, the positional relationship between the suction port and the tongue will be described with reference to FIG. In the longitudinal sectional view, a portion of the upper surface 42a of the tongue portion 42 that is closest to the suction port 6 is connected to a portion of the suction port 6 that is closest to the front surface and located at the lowest position by a straight line. Assuming that the connected straight line is denoted by reference numeral L1, the area in front of the straight line L1 has a relatively small volume of indoor air, and the ratio of the air present ahead of the straight line L1 to the air conditioning of the indoor unit 2 is It is getting smaller. Therefore, the member arranged in front of the straight line L1 is difficult to prevent air conditioning. Since the filter cleaning member 14 is in front of the straight line L1, it does not contribute to an increase in ventilation resistance. Similarly, since the filter driving roller 52b of the cleaning mechanism driving unit 15c is also in front of the straight line L1, air conditioning is not hindered.

  Since the filter driving roller 52b is in front of the straight line L1, the contact point 82 between the brush 47 and the air filter 35 in the longitudinal sectional view is located in front of the straight line L1. In addition, since the brush 47 is formed of plastic straight hair, it does not come into contact with a point, and the contact 82 here is not a literal contact but has a meaning equivalent to a contacted portion. Since the contact 8 is in front of the straight line L1, the airflow is weak in the vicinity of the contact 82, and the dust dropped by the brush 47 is difficult to scatter. In other words, the flow of room air is weak below the filter cleaning member 14 in order to set the dust to be difficult to scatter.

(Filter cleaning mechanism)
Here, the filter cleaning mechanism 15 shown in FIGS. 8 and 9 will be described. 10 is a front view of the filter cleaning mechanism, FIG. 11 is a left side view of the filter cleaning mechanism, and FIG. 12 is a bottom view of the filter cleaning mechanism. FIG. 13 shows the relationship between the cleaning mechanism driving unit of the filter cleaning mechanism and the air filter.

  The filter cleaning mechanism 15 includes two left and right holding portions 15a and 15b in order to hold the two air filters 35a and 35b shown in FIG. The air filters 35a and 35b support a filter portion 35ab that allows room air to pass therethrough for filtering by a thin support frame 35aa. As already described with reference to FIGS. 8 and 9, the filter driving motors 56a and 56b and the filter driving rollers 52a and 52b for driving the air filters 35a and 35b shown in FIG. Is configured. Factors that increase the thickness of the filter cleaning mechanism 15 because the filter driving rollers 56a and 56b are relatively difficult to downsize due to the relationship with the material of the plastic air filters 35a and 35b. It has become.

  The holding portions 15a and 15b are composed of an arm 17 and a frame 16 constituted by a blade 53 and a beam 59 passed between the arms 17. Since the frame 16 is configured by combining thin members such as the blade 53 and the beam 59 in order to improve ventilation, a space is formed inside, and the space can be effectively utilized by using this space effectively. Effective use is planned. That is, the holding portions 15a and 15b are provided with filter driving motors 56a and 56b for driving the filter driving rollers 52a and 52b, respectively, at positions overlapping the air filters 35a and 35b when viewed from the front. Is attached. The filter driving motor 56a is disposed between the upper guide groove 17a and the lower guide groove 17b shown in FIG. In other words, between the position of the air filter 35a before changing the moving direction by the filter driving roller 52a and the position of the air filter 35a after changing the moving direction by the fill driving roller 52a, the filter driving motor. 56a is arranged. The frame 16 is fixed by screwing the fixing portion 16 c to the main body casing 5. The central fixing portion 16c is fixed to the screw hole 29 of the front grill 12 shown in FIG. Further, the claw 16d is inserted into the main body casing 5 to fix the frame 16 behind.

  Since room air passes through the air filter 35a, the filter driving motor 56a generates ventilation resistance at the portion where it overlaps with the air filter 35a. Therefore, the filter driving motor 56a is arranged at the left end of the filter cleaning mechanism 15 and is as air as possible. The filter 35 is attached so that the area overlapping the filter 35 is reduced. For the same reason, a filter driving motor 56b is attached to the left end of the holding portion 15b of the filter cleaning mechanism 15. The filter driving motors 56a and 56b are arranged so as to overlap in a side view. Further, as shown in FIG. 9, since the suction port 6 is at the upper portion and the indoor air flowing from the suction port 6 to the cross flow fan 40 is directed to the lower back side, the filter driving motors 56a and 56b are connected to the filter driving rollers 52a, By arranging it close to 52b, the ventilation resistance is reduced.

  The driving force generated by the filter driving motors 56a and 56b is transmitted to the filter driving rollers 52a and 52b by a plurality of gears. A gear connecting the filter driving roller 52a and the filter driving motor 56b is housed in a gear box 57 shown in FIG.

  In addition to driving the air filters 35a and 35b, the filter cleaning mechanism 15 is provided with a brush driving motor 58 for driving the brush 47 shown in FIGS. The brush drive motor 58 is also disposed at a position overlapping the air filter 35a in front view. In addition, when viewed from the side, the brush driving motor 58 is disposed at a position overlapping the filter driving motors 56a and 56b. The brush driving motor 58 is also included in the cleaning mechanism driving unit 15c.

  A latching protrusion 16 b for fixing to the filter cleaning member 14 is provided at the lower portion of the frame 16 of the filter constituting mechanism 15.

(Filter cleaning member)
14 is an exploded view of the filter cleaning member, FIG. 15A is a front view of the filter cleaning member, FIG. 15B is a plan view of the filter cleaning member, and FIGS. 16A, 16B, and 16B. 16 (c), FIG. 16 (d), and FIG. 16 (e) are cut along lines EE, FF, GG, HH, and I-I in FIG. 15 (b), respectively. FIG. The filter cleaning member 14 includes a brush 47, a brush side member 60 that holds the brush 47, and a lid member 61 that covers the brush side member 60. The lid member 61 is pivotably hooked to the brush side member 60 by a hinge 65, and is fixed to the brush side member 60 with the lid closed by a central locking member 66 (FIG. 15B). FIG. 16 (c) and FIG. 16 (e)). The brush side member 60 and the lid member 61 are combined to form a space for putting dust inside, and constitute a dust box 49 (FIGS. 18B and 16D). On one side of the brush side member 60, teeth 50 of the comb portion are arranged corresponding to the length of the brush 47 (FIG. 14).

  The shaft 63 of the brush 47 is rotatably fitted to the bearing 62 of the brush side member 60 (FIG. 16A). Cap members 63 a having an outer diameter substantially equal to the inner diameter of the bearing 63 are fitted into both ends of the shaft 63 of the brush 47 so that there is no play between the shaft and the bearing 63. The shaft 63 of the brush 47 is formed of a highly rigid cylindrical plastic or metal that is difficult to bend. A driven gear 64 is attached to the shaft 63 of the brush 47 (FIGS. 15B and 16B). The driven gear 64 meshes with the drive gear 58 by fixing the filter cleaning member 14 to the filter cleaning mechanism 15. A cylindrical rod-shaped member 51 is attached to the lid member 61, and a gear 67 is fixed to the rod-shaped member 51 (FIGS. 14 and 15B). The gear 67 of the rod-like member 51 is connected to the driven gear 64 of the brush 47 and rotates as the brush 47 rotates.

  The lid member 61 to the brush side member 60 is fixed by the lock member 66. Further, as shown in FIG. 9, the filter cleaning member 14 is directly fixed to the frame 16 by the locking member 16 c engaging the locking projection 16 b. Similarly to the lock member 18c, the lock members 18a, 18b, and 18d are configured to be able to latch the latch protrusion 16b.

(Humidification duct)
Next, the humidification duct 20 shown in FIG. 9 etc. is demonstrated. Fig. 17 (a) is a front view of the humidifying duct, Fig. 17 (b) is a side view of the humidifying duct, Fig. 18 (a) is a rear view of the humidifying duct, and Fig. 18 (b) is J- in Fig. 17 (a). J line sectional drawing and FIG. 19 are exploded sectional views of the humidification duct when the pre-filter is extracted from the state of FIG. A cylindrical suction port 61 is provided in the lower part of the humidification duct 20, and humidified air is supplied from the outdoor unit 3 by a humidification hose (not shown) connected to the suction port 61. An air supply port 55 is provided in the upper portion of the humidification duct 20, and the pre-filter 21 is disposed between the suction port 61 and the air supply port 55. Since the suction port 61 is provided at the lower left in the front view, the flow of the humidified air is directed from the lower left to the upper right. Therefore, the humidified air that has exited the air supply port 55 tends to spread rightward in the main body casing 5 as viewed from the front surface 5b. A condensation sensor 72 for detecting condensation in the humidification duct 20 is attached in the air supply port 55.

  As shown in FIG. 19, the humidifying duct 20 is configured by combining a duct main body 73 and a duct lid 74 in order to provide a cavity 54 inside. A projection 76 is fitted into a hole of a locking portion 75 provided in the duct main body 73 and the duct lid 74 to fix the duct lid 74 to the duct main body 73, and a contact portion between the duct main body 73 and the duct lid 74. The humidifying duct 20 is given airtightness by stopping with an adhesive. As shown in FIG. 19, a rib 77 is formed on the inner wall of the humidifying duct 20 so that the prefilter 21 can be housed in a plastic frame 78 and can be attached and removed freely.

(Relationship between indoor heat exchanger and humidification duct)
20 and 21 are a front view and a perspective view of the indoor unit with the front grill removed. FIG. 22 is a front view for explaining the relationship between the indoor heat exchanger and the humidification duct. When viewed from the front, the humidified duct 20 occupies the hatched area in FIGS. 20 and 22. Immediately above the humidifying duct 20, there is a recess 27 for mounting the filter cleaning member 14 as shown in FIG. 20, and the filter cleaning member 14 is mounted as shown in FIG. Further, a filter cleaning mechanism 15 is provided on the filter cleaning member 14. The filter driving rollers 52 a and 52 b and the filter driving motors 56 a and 56 b (cleaning mechanism driving unit 15 c) of the filter cleaning mechanism 15 are provided on the filter cleaning member 14. Therefore, not only the suction port 6 is on the top surface and the suction port for sucking room air is not on the front surface of the indoor unit 3, but the room air sucked from the upper part is also filtered by the filter cleaning member 14 or the cleaning mechanism drive unit 15c. Therefore, it is difficult to reach around the humidification duct 20. As can be seen from FIG. 22, the air supply port 55 of the humidification duct 20 is opposed to the lower front side heat exchanger 36ab of the indoor side heat exchanger 36, and the filter cleaning mechanism 15 is generally formed of the lower front side heat exchanger. It does not face 36ab. Therefore, most of the lower front side heat exchanger 36ab can be subjected to heat exchange of the humidified air supplied from the humidification duct 20. In order to sufficiently exhibit such a function, the humidification duct 20 is preferably disposed below the straight line L1 shown in FIG. Furthermore, as shown in FIG. 9, it is preferable that the lower part of the indoor heat exchanger 36 is also provided with a portion facing the humidification duct 20 before the straight line L1.

  In addition, the electrical component box 45 is arrange | positioned in the right space of the humidification duct 20 toward the front. As shown in FIG. 8, a space for expanding the humidified air supplied from the air supply port 55 of the humidifying duct 20 to the right in the front view is provided on the back side of the electrical component box 45. When the electrical component box 45 is provided under the cleaning mechanism drive unit 15c, the distance between the electrical component box 45 and the filter drive motors 56a and 56b can be shortened, so that the electrical component box 45 and the filter drive motors 56a and 56b can be reduced. The distance between the wires is shortened. As shown in FIG. 9, the depth of the electrical component box 45 is designed to be substantially the same as that of the humidifying duct 20, and the humidifying duct 20 is arranged at a position overlapping the electrical component box 45 in a side view, so that effective use of space is achieved. Is planned.

  Furthermore, a power supply box 80 in which a terminal board for commercial power supply such as an alternating voltage of 100 volts and 200 volts is housed on the right side of the electrical component box 45 from the front. Power for the electrical component box 45 is also supplied from the power supply box 80. By arranging the power supply box 80 along with the electrical component box 45 along the longitudinal direction of the indoor unit 2, not only the power supply distance to the electrical component box 45 is shortened, but also the power supply box 80 is electrically connected in a side view. Since it is arranged at a position overlapping with the product box 45, the space can be effectively used. Moreover, the speaker 81 is arrange | positioned between the humidification duct 20 and the electrical component box 45, and the effective use of a space is aimed at. Since the speaker 81 is close to the electrical component box 45, the wiring between the speaker and the electrical component box 45 is also shortened.

  By arranging as described above, the width W1 in which the air filters 35a and 35b can be arranged can be made larger than the width W0 of the indoor unit 2. Moreover, the width W2 of the indoor heat exchanger 36 can be increased. Thereby, the effective length of the heat exchanger which contributes to heat exchange can be extended compared with the past.

<Modification>
(A)
In the said embodiment, although the case where the humidification duct 20 was used as a duct which supplies air was demonstrated, the thing other than the humidification duct 20 may be sufficient as the air supply duct which concerns on this invention. Further, the position where the air supply duct 20 is arranged is not limited to the left end as viewed from the front, but can be arranged at the center or the right end. The width of the humidifying duct 20 is about one fifth of the width W2 of the indoor heat exchanger 36, but 6 minutes for effectively using the indoor heat exchanger 36 for supplying humid air. A value larger than about 1 is preferable.

(B)
In the embodiment described above, the indoor heat exchanger 36 having an inverted V-shape as viewed from the side has been described as the indoor heat exchanger. However, the indoor heat exchanger has an inverted V-shaped indoor heat exchange. For example, the present invention can be applied to a type without the back side heat exchanger 36b. However, in order to reduce the size, an inverted V-shaped indoor heat exchanger is preferable.

(C)
In the said embodiment, although the suction inlet 6 demonstrated the case where it was provided only in the top | upper surface 5a of the main body casing 5, for example, an opening part may be formed above the front panel 8 and it may serve as an air supply opening. It only needs to be provided above the region overlapping with the cross flow fan 40 in front view.

<Features>
(1)
As shown in FIG. 9, the suction port 6 is provided on the top surface 5 a of the main body casing 5 above the cross flow fan 40 (blower fan) in a longitudinal sectional view. Since both the suction port 6 and the cross flow fan 40 extend in parallel to the longitudinal direction of the indoor unit 2, it can be seen that the suction port 6 is provided above the region overlapping the cross flow fan 40 even in a front view. The lower front side heat exchanger 36ab of the indoor side heat exchanger 36 facing the opening 55 of the humidifying duct 20 is located outside the strong flow of room air from the suction port 6 to the cross flow fan 40. Outside air is supplied to the lower front side heat exchanger 36ab from the opening 55 of the humidification duct 20. Therefore, heat exchange with the outside air can be performed using the lower front side heat exchanger 36ab that is not often used for heat exchange of room air, and the indoor unit can be reduced in size without degrading heat exchange performance. be able to.

  Furthermore, it is preferable that the lower part of the indoor heat exchanger 36 facing the opening 55 of the humidification duct 20 is in front of the straight line L1 shown in FIG. A straight line L1 extending from the front end 6bf of the suction port 6 to the tongue portion 42 and in contact with the surface 42a of the tongue portion 42 indicates the lowermost part of the relatively strong portion of the indoor air flow from the suction port 6 toward the cross flow fan 40. Yes. Therefore, the lower part of the indoor side heat exchanger 36 that faces the opening 55 of the humidifying duct 20 can be disposed outside the flow of the indoor air by being in front of the straight line L1.

  Even when viewed from the front, if the position is higher than the region overlapping the cross flow fan 40, for example, an opening may be provided above the front panel 8 to serve as a suction port, but it is provided only on the top surface 5a as in the above embodiment. Thus, the downward flow of the indoor air can be strengthened, and the influence of the humidifying duct 20 on the heat exchange of the indoor air can be reduced.

(2)
All of the humidified air blown from the opening 55 of the humidifying duct 20 passes through the prefilter 21 (second air filter), and dust is removed by the prefilter 21 (see FIG. 9). Since the pre-filter 21 removes dust from the humidified air, the air filter 35a (first air filter) downstream of the suction port 6 does not have to remove the dust from the humidified air. Therefore, it is not necessary to extend the air filter 35a to the opening 55 of the humidification duct 20. Therefore, the air filter 35a can be easily attached and detached and the cleaning can be easily performed.

(3)
By providing the dust box 49, the distance from the suction port 6 to the humidification duct 20 can be increased by the height of the dust box 49 (see FIG. 9). That is, since the front side heat exchanger 36a can be lengthened in the height direction by the height of the dust box 49, the area of the front side heat exchanger 36a can be increased. As a result, the upper side of the lower front side heat exchanger 36ab also partially contributes to the heat exchange of the indoor air, while the area of the lower front side heat exchanger 36ab that contributes to the heat exchange of the humidified air also increases, and the supply of humidified air Therefore, it is possible to suppress a decrease in air conditioning performance due to an increase in the amount of air to be heat exchanged.

(4)
As shown in FIG. 9, a filter cleaning mechanism 15 is provided in a space above the humidifying duct 20 that is generated by the thickness of the humidifying duct 20. As a result, the dust box 49 (filter cleaning member 14) can be provided by utilizing the space generated by the thickness of the humidification duct 20, and the filter cleaning mechanism 15 can be provided at the same depth thereon. Thereby, size reduction of an indoor unit provided with the filter cleaning mechanism 15 is achieved.

(5)
As shown in FIG. 20, by arranging the humidification duct 20 and the electrical component box 45 side by side, the suction port 6 is provided by providing a suction port above a region overlapping the cross flow fan 40 (blower fan) in a front view. The reduction in size can be compensated by widening the suction port 6 and the indoor heat exchanger 36 to the side where the electrical component box has disappeared. Thereby, it is possible to reduce the size of the indoor unit without reducing the performance of heat exchange.

The figure which shows the outline | summary of a structure of the air conditioning apparatus which concerns on one Embodiment of this invention. The front view of the indoor unit of the air conditioning apparatus which concerns on one Embodiment of this invention. The perspective view of the indoor unit which removed the front panel seen from the C direction of FIG. The perspective view of the indoor unit which removed the front panel seen from the D direction of FIG. The top view of the front grille of the indoor unit shown in FIG. The front view of the front grille of the indoor unit shown in FIG. The side view of the front grille of the indoor unit shown in FIG. AA sectional view taken on the line in FIG. BB sectional drawing in FIG. The front view of a filter cleaning mechanism. The side view of a filter cleaning mechanism. The bottom view of a filter cleaning mechanism. Schematic which shows the outline of the relationship between an air filter and the cleaning mechanism drive part. The disassembled perspective view of a filter cleaning member. (A) The front view of a filter cleaning member. (B) The top view of a filter cleaning member. (A) EE sectional view taken on the line of a filter cleaning member. (B) FF sectional view taken on the line of a filter cleaning member. (C) GG sectional view of a filter cleaning member. (D) HH sectional view taken on the line of a filter cleaning member. (E) II sectional view taken on the line of a filter cleaning member. (A) Front view of humidification duct. (B) Side view of the humidification duct. (A) The rear view of a humidification duct. (B) JJ sectional view taken on the line in FIG. FIG. 19 is an exploded cross-sectional view showing a state in which the prefilter is removed from the humidification duct of FIG. The front view of the indoor unit which removed the front grille. The perspective view of the indoor unit which removed the front grille. The front view for demonstrating the relationship between an indoor side heat exchanger and a humidification duct.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Air conditioning apparatus 2 Indoor unit 3 Outdoor unit 6 Suction inlet 7 Outlet 8 Front panel 14 Filter cleaning member 15 Filter cleaning mechanism 20 Humidification ducts 35a and 35b Air filter 36 Indoor side heat exchanger 40 Cross flow fan 42 Tongue 45 Electrical equipment Product box 46 Drip-proof cover 49 Dust box 52a, 52b Filter driving roller 56a, 56b Filter driving motor

Claims (6)

A main body (5) having an inlet (6) and an outlet (7) disposed below the inlet;
An air supply duct (20) having an opening (55) that is arranged between the air outlet and the air inlet and supplies air to a ventilation path extending from the air inlet to the air outlet;
An indoor heat exchanger (36) disposed on the downstream side of the suction port;
A blower fan (40) arranged on the downstream side of the indoor-side heat exchanger and disposed above the air supply duct in a front view,
The suction port is provided above a region overlapping with the blower fan in a front view among all regions except the back surface of the main body,
The indoor unit of an air conditioner, wherein the opening of the air supply duct is disposed at a position facing a lower part of the indoor heat exchanger. A first air filter (35a, 35b) that is disposed on the downstream side of the suction port and collects dust of room air sucked from the suction port;
The indoor unit of an air conditioner according to claim 1, wherein the air supply duct has a detachable second air filter (21).   The indoor unit of an air conditioner according to claim 2, further comprising a dust box (49) disposed above the air supply duct and storing dust removed from the first air filter. A first air filter (35a, 35b) that is disposed downstream of the suction port and collects dust of indoor air sucked from the suction port;
The indoor unit of the air conditioning apparatus according to claim 1, further comprising a filter cleaning mechanism (15) disposed above the air supply duct and cleaning dust adhering to the first air filter.   The indoor unit of an air conditioner according to any one of claims 1 to 4, further comprising an electrical component box (45) arranged side by side at a position overlapping the air supply duct in a side view on the side of the air supply duct. .   The air conditioner indoor unit according to any one of claims 1 to 5, wherein the suction port is provided only on the top surface (5a).

Images