JP4411359B1 - Air conditioner - Google Patents

Abstract

An air conditioner that can easily reduce dust accumulated in a cleaning device.
In an air conditioner including a cleaning device that sucks and removes dust from components in which dust in indoor air taken into the indoor unit is accumulated, the cleaning device includes a plurality of blades. And a fan 22 that houses and rotates, a housing 21 that houses the fan 22 and has an intake port 21a and an exhaust port 21c, and a suction path 25 that has a suction port facing the components and is connected to the intake port 21a. The air flow from the air inlet 21a into the housing 21 along the rotation surface of the blade 23, and the blade 23 has an upstream edge 21b extending in the radial direction with respect to the air flowing from the air inlet 21a.
[Selection] Figure 7

Description

  The present invention relates to an air conditioner including a cleaning device that cleans dust that adheres to and accumulates on components in an indoor unit by intake air.

  A conventional air conditioner is disclosed in Patent Document 1. In this air conditioner, a filter that collects dust is disposed in an opening that opens in any region from the front surface to the upper surface of the indoor unit, and a cleaning device that cleans the dust collected by the filter is provided. The cleaning device includes a fan unit disposed on the side of the indoor unit, and a suction duct and an exhaust duct are connected to the fan unit. The suction duct extends in the lateral direction at the front of the indoor unit, and a nozzle that moves on the surface of the filter is attached.

  FIG. 19 shows a schematic side sectional view of the fan unit. The fan unit 20 has a fan 22 housed in a housing 21. The fan 22 is rotationally driven by the fan motor 24 with the bottom plate 22a connected to the motor shaft 24a. The fan 22 is composed of a sirocco fan in which a plurality of blades 23 extending in the radial direction are annularly arranged on the bottom plate 22a at predetermined intervals.

  A circular air inlet 21a is opened on the shaft of the fan 22 in the housing 21, and a cover 25d that covers the air inlet 21a is attached. As a result, an intake path 25 that guides the suction airflow to the intake port 21a is formed. The blade 23 is disposed outside the air inlet 21a, and guides the airflow flowing in the axial direction from the air inlet 21a to the outer peripheral side in the radial direction. An exhaust port (not shown) connected to the exhaust duct opens on the peripheral surface of the housing 21.

  When the cleaning device is driven, the fan 22 is rotated by driving the fan motor 24, and a suction airflow is generated in the suction path 25. Dust adhering to the filter is sucked from the nozzle, flows through the suction path 25 as shown by arrow A1, and flows into the housing 21 from the air inlet 21a. The airflow that has flowed into the housing 21 is guided in the outer peripheral direction as indicated by arrows A2 and A3, flows through the exhaust duct via the exhaust port, and is removed together with the exhaust. Thereby, the cleaning of a filter can be automated and the convenience of an air conditioner can be improved.

JP 2008-75658 A (pages 4-6, FIG. 5)

  However, according to the above-described conventional air conditioner, the blade 23 is formed such that the upstream edge 23a with respect to the airflow flowing into the housing 21 extends in the axial direction. For this reason, as shown by arrows A2 and A3, the airflow that flows into the housing 21 and is guided in the outer circumferential direction collides with the edge 23a of the blade 23 substantially orthogonally. For this reason, the dust contained in the airflow is pressed against the edge 23 a of the blade 23, and is easily caught on the edge 23 a of the blade 23. Thereby, dust easily accumulates on the edge 23 a of the blade 23 and the root portion of the blade 23.

  Patent Document 1 is provided with a rib for dropping off dust accumulated on the inner peripheral side of the blade 23. However, this rib has a problem that it is difficult to manufacture because the gap between the blade 23 and the rib needs to be maintained with high accuracy. Further, since a gap is formed between the rib and the bottom plate 22a, dust accumulated on the root portion of the blade 23 cannot be dropped off. For this reason, the distance between the blades 23 near the root is reduced by the dust, and the accumulated dust gradually grows to fill the gaps between the blades 23, resulting in a problem that the suction force is reduced.

  In particular, in order to improve convenience, it is desirable that the dust removed by the cleaning device is removed via the exhaust port via the fan 22 without being removed at any location in the flow path inside the cleaning device. It is. For this reason, the accumulation of dust on the edge 23a of the blade 23 and the root portion of the blade 23 has become a more prominent problem.

  An object of the present invention is to provide an air conditioner that can easily reduce dust accumulated in a cleaning device.

  In order to achieve the above object, the present invention provides an air conditioner including a cleaning device that sucks and removes dust from a component in which dust in indoor air taken into the indoor unit is accumulated. A fan that rotates with a blade, a housing that houses the fan and has an air inlet and an air outlet, and a suction path that has an air inlet that faces the components and is connected to the air inlet. The blade has an air flow flowing into the housing from the air inlet along the rotation surface of the blade, and the blade has an upstream edge extending in the radial direction with respect to the air flowing from the air inlet. Yes.

  According to this configuration, when the fan rotates, a suction airflow is generated in the suction path, and dust attached to the components in the indoor unit flows into the suction path through the suction port. The airflow flowing through the suction path flows into the housing from the intake port along the rotation surface of the fan. The airflow flowing into the housing comes into contact with the edge extending in the radial direction of the blade and is guided in the outer peripheral direction of the fan. The airflow guided in the outer peripheral direction is discharged together with dust through the exhaust port.

  In the air conditioner configured as described above, the present invention is characterized in that the fan is a centrifugal fan. According to this configuration, the airflow flowing through the suction path flows from the air inlet opening in the axial direction of the fan along the rotation surface of the fan and is discharged in the radial direction.

  In the air conditioner having the above-described configuration, the edge of the blade is substantially parallel to the rotation surface of the fan or the outer peripheral side is separated from the intake port in the axial direction with respect to the inner peripheral side. .

  In the air conditioner having the above-described configuration, the fan may include a boss disposed at a rotation center and close to the intake port, and the blade may extend from a peripheral surface of the boss to an outer edge of the intake port. It is characterized by being formed. According to this configuration, the airflow flowing from the intake port along the rotation surface of the fan is guided to the pressure surface of the blade through the edges facing the intake ports of the plurality of blades arranged on the peripheral surface of the boss. .

  In the air conditioner configured as described above, the housing may have a circular plate on the shaft of the fan to form the intake port in an annular shape, and the blade may extend from the inner edge to the outer edge of the intake port. It is characterized by being formed. According to this configuration, the airflow flowing from the annular intake port along the rotation surface of the fan passes between the edges facing the intake ports of the plurality of blades and is guided to the pressure surface of the blade.

  According to the present invention, in the air conditioner configured as described above, the blade has an end face on the opposite side to the inlet side connected by an annular ring. According to this configuration, the blade is reinforced by the ring without blocking between the blades on the bottom surface side of the housing opposite to the air inlet.

  According to the present invention, in the air conditioner configured as described above, the component part includes a filter that collects dust in the indoor air that is taken into the indoor unit. According to this configuration, cleaning of the filter can be automated.

  According to the present invention, the airflow flows into the housing from the air inlet along the rotation surface of the blade, and the blade has an upstream edge extending in the radial direction with respect to the airflow flowing from the air inlet. The angle of intersection with the upstream side edge becomes smaller. For this reason, the pressing force at the time of collision between the dust and the edge of the blade is reduced, and the dust adhering to the blade can be reduced. In addition, dust caught on the edge of the blade is pushed out to the outer peripheral side by the air flow and centrifugal force, and dust attached to the blade is further reduced. Accordingly, dust accumulated between the edge of the blade of the cleaning device and the blade can be easily reduced.

  Embodiments of the present invention will be described below with reference to the drawings. In the following drawings, for convenience of explanation, the same reference numerals are given to the same parts as those in the conventional example shown in FIG. FIG. 1 is a perspective view showing the inside of an air conditioner indoor unit according to the first embodiment with an exterior panel removed. The indoor unit 1 is provided with a heat exchanger 3 facing an opening (not shown) for taking in indoor air provided on the front and upper surfaces of the exterior panel. A blower outlet 5 through which conditioned air heat-exchanged by the heat exchanger 3 is sent out is provided below the indoor unit 1. The blower outlet 5 is provided with a louver (not shown) that changes the wind direction.

  A filter rail 2a for installing the filter 2 (see FIG. 2) is provided in front and above the heat exchanger 3. A fan unit 20 of the cleaning device 10 that removes dust collected by the filter 2 (see FIG. 2) is disposed on the left side of the indoor unit 1. The cleaning device 20 includes a suction path 25 and an exhaust path 28. The suction path 25 has a front surface portion 25 a that is disposed in the front portion of the indoor unit 1 and extends in the lateral direction, and a side surface portion 25 b that is disposed on the side surface of the indoor unit 1. The front surface portion 25a is covered with a cylindrical duct 25c, and the side surface portion 25b is covered with a cover 25d.

  FIG. 2 shows a state in which the duct 25c of the front surface portion 25a and the cover 25d (see FIG. 3) of the side surface portion 25b of the suction path 25 are removed. A filter 2 that collects dust is disposed between the opening (not shown) of the exterior panel and the heat exchanger 3. The filter 2 is movable in the vertical direction on the filter rail 2a by a filter drive motor 4 provided on the left side of the indoor unit 1.

  A duct 25c (see FIG. 1) of the front surface portion 25a of the suction duct 25 is formed with a suction port (not shown) facing the filter 2, and a rotating brush 27 extending in the lateral direction is arranged inside. The rotating brush 27 is rotated by driving a brush motor 26 provided on the right side of the indoor unit 1 and knocks out dust collected by the filter 2.

  3 shows a perspective view of the fan unit 20 of the cleaning device 10, and FIG. 4 shows a state where the cover 25d of the fan unit 20 is removed. In the fan unit 20, an air inlet 21 a that opens in a circular shape is formed in the vertical surface of the housing 21 that houses the fan 22. The housing 21 is formed in a cylindrical shape surrounding the fan 22, and is provided with an exhaust port 21c (see FIG. 5) that opens from the peripheral surface toward the tangential direction. An exhaust path 28 is formed by connecting the duct 28a to the exhaust port 21c.

  The housing 21 is integrally formed with a communication port 25e between the front surface portion 25a (see FIG. 1) of the suction passage 25 and the side surface portion 25b. A front surface portion 25a is formed by a duct 25c (see FIG. 1) fitted to the communication port 25e, and a side surface portion 25b is formed by a cover 25d that covers the intake port 21a.

  5 and 6 are a perspective view and a plan view of the fan 22, respectively. The fan 22 is rotationally driven by a fan motor 24 (see FIG. 7) attached to the back surface of the bottom plate 21b of the housing 21 (see FIG. 3). The fan 22 is composed of a turbo fan in which a large number of blades 23 are provided radially on the peripheral surface of a boss 22b disposed in the center. The rotation axis direction of the fan 22 is arranged in the lateral direction of the indoor unit 1 so that the lateral width of the indoor unit 1 is suppressed from increasing.

  The boss 22b supports the motor shaft 24a (see FIG. 7) of the fan motor 24, and the upstream end face is disposed in the vicinity of the intake port 21a (see FIG. 4). The blade 23 extends from the peripheral surface of the boss 22b to the outside of the outer edge of the intake port 21a, and the pressure surface 23c is a curved surface perpendicular to the rotation surface. The blade 23 may be formed by a flat surface. Further, the blade 23 has an edge 23b on the side of the air inlet 21a formed substantially parallel to the rotation surface of the fan 22, and is reinforced by connecting the bottom plate 21b side with an annular ring 22c.

  FIG. 7 is a schematic side sectional view of the fan unit 20. The side surface portion 25b of the suction passage 25 is formed along the opening surface of the intake port 21a of the housing 21 so that the axial width W of the fan 22 is sufficiently narrow with respect to the diameter of the intake port 21a. An edge 23b of the blade 23 on the air inlet 21a side is arranged in the vicinity of the air inlet 21a along the air inlet 21a.

  In the air conditioner configured as described above, dust is collected by the filter 2 in the indoor air taken into the indoor unit 1 from the opening of the exterior panel. The air from which the dust has been removed exchanges heat with the heat exchanger 3 and is sent out into the room through the outlet 5. Thereby, indoor air conditioning is performed.

  When driving of the cleaning device 10 is instructed, the filter drive motor 4, the brush motor 26, and the fan motor 24 are driven. The filter 2 is moved up and down on the filter rail 2a by the drive of the filter drive motor 4. The rotating brush 27 is rotated by the driving of the brush motor 26, and dust collected by the vertically moving filter 2 is knocked out by the rotating brush 27. The fan 22 is rotated by driving the fan motor 24, and a suction airflow is generated in the suction path 25.

  Thereby, the dust adhering to the filter 2 is sucked from the suction port of the duct 25c together with the air current, and flows through the front surface portion 25a of the suction path 25 as shown by an arrow B1 (see FIG. 1). The airflow flowing through the front surface portion 25a flows through the side surface portion 25b having a narrow width W as indicated by an arrow B2 (see FIG. 7), and the housing 21 extends from the air inlet 21a along the rotation surface of the fan 22 as indicated by an arrow B3. Flows in. Further, a part of the airflow is bent in the vicinity of the air inlet 21a, is reversed as shown by an arrow B4, and flows into the housing 21.

  At this time, the blade 23 extends in the radial direction with the upstream edge 23b arranged in parallel to the rotation surface with respect to the airflow flowing from the air inlet 21a as shown by the arrow B3. For this reason, the airflow flowing into the housing 21 contacts the blade 23 at a small crossing angle. Thereby, the pressing force at the time of collision between the dust contained in the airflow and the edge 23b of the blade 23 can be lowered, and the dust adhering to the blade 23 is reduced.

  Further, since the air flow advances in the radial direction, dust caught on the edge 23b of the blade 23 is pushed out to the outer peripheral side. In addition, dust caught on the edge 23b by the centrifugal force of the blade 23 is pushed out to the outer peripheral side. For this reason, the dust adhering to the blade 23 is further reduced.

  The airflow that has flowed into the housing 21 is guided in the outer peripheral direction, flows through the exhaust passage 28 via the exhaust port 21c, and is discharged to the outside together with dust. Thereby, the cleaning of the filter 2 is automated.

  According to this embodiment, airflow flows into the housing 21 from the air inlet 21a along the rotation surface of the fan 22, and the blade 23 has an upstream edge 23b extending in the radial direction with respect to the airflow flowing from the air inlet 21a. The crossing angle between the traveling direction of the airflow and the edge 23b of the blade 23 becomes small. For this reason, the pressing force at the time of collision between the dust and the edge 23b of the blade 23 is reduced, and the dust attached to the blade 23 can be reduced. In addition, the dust caught on the edge 23b of the blade 23 is pushed out to the outer peripheral side by the air flow and centrifugal force, and the dust adhering to the blade 23 is further reduced. Therefore, dust accumulated between the edge 23b of the blade 23 of the cleaning device 10 and the blade 23 can be easily reduced.

  Moreover, since the fan 2 consists of a turbo fan, the airflow which flowed into the housing 21 can be easily distribute | circulated in the outer peripheral direction in which the exhaust port 21c is formed. Therefore, dust accumulation can be easily reduced. The centrifugal fan such as a radial fan is not limited to the turbo fan, and the same effect can be obtained. However, when the fan 2 is formed of a turbo fan, the number of blades 23 can be reduced because the static pressure is high. For this reason, the dust accumulated between the blades 23 can be further reduced. Further, the turbo fan has a higher rotational speed when blowing the same air volume than the sirocco fan. For this reason, since centrifugal force can be raised more, the dust adhering to the braid | blade 23 can be reduced.

  Further, the fan 22 is formed such that the boss 22b close to the intake port 21c is arranged at the center of rotation, and the blade 23 is formed to extend from the peripheral surface of the boss 22b to the outside of the outer edge of the intake port 21a. An edge 23b that is substantially parallel to the surface is on the upstream side with respect to the airflow flowing in from the air inlet 21a. As a result, the angle of intersection between the airflow and the upstream edge (edge 23 b) of the blade 23 can be easily reduced. The blade 23 only needs to extend to at least the outer edge of the air inlet 21a.

  Further, the bottom plate 21b side of the blade 23 opposite to the air inlet 21a is connected and reinforced by an annular ring 22c. The bottom plate 21b side of the blade 23 may be connected and reinforced by a support member such as a plate-like disk. However, when a plate-like support member is used, the inside of the housing 21 is separated in the axial direction by the support member into the intake port 21a side and the bottom plate 21b side. For this reason, when the fan motor 24 having a large axial play of the motor shaft 24a is used, the fan 22 is pushed toward the intake port 21a due to the difference in static pressure between the intake port 21a side and the bottom plate 21b side. This causes the upstream edge 23 b of the blade 23 to rub against the housing 21.

  For this reason, by connecting the bottom plate 21b side of the blade 23 with the ring 22c, it is possible to form an opening having a wide opening area without blocking between the blades 23 on the side opposite to the intake port 21a. Thereby, sliding with the braid | blade 23 and the housing 21 can be prevented. In addition, dust accumulated between the blades 23 tends to flow out from the opening, and blockage between the blades 23 due to dust can be prevented.

The configuration of this embodiment is summarized as follows.
(1) The airflow flowing into the intake port 21c is along the rotation surface, and the inflow direction and the rotation axis are substantially perpendicular.
(2) The edge 23b on the upstream side of the blade 23 and the rotating shaft are substantially vertical when viewed from the side.
(3) The inflow direction of the airflow flowing into the intake port 21c and the edge 23b of the blade 23 are substantially parallel when viewed from the side.
(4) The blade 23 is provided perpendicular to the rotation surface, and the upstream end is not inclined forward in the rotation direction.

  Next, the air conditioner of 2nd Embodiment is demonstrated. FIG. 8 is a schematic side cross-sectional view showing the fan unit 20 of the air conditioner cleaning device 10 of the present embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. The air conditioner of this embodiment differs in the shape of the braid | blade 23 of the cleaning apparatus 10 with respect to 1st Embodiment. Other parts are the same as those in the first embodiment.

  The blade 23 of the fan 22 extends outward from the outer edge of the air inlet 21a from the peripheral surface of the boss 22b, and the pressure surface 23c is a curved surface perpendicular to the rotating surface. The blade 23 may be formed up to the outer edge of the air inlet 21a, and the blade 23 may be formed by a flat surface. The blade 23 has an edge 23b on the intake port 21a side upstream of the airflow flowing from the intake port 21a, and the outer peripheral side is inclined away from the intake port 21a in the axial direction with respect to the inner peripheral side.

  With respect to the airflow flowing in from the air inlet 21a as indicated by an arrow B3, the blade 23 extends in the radial direction so that the upstream edge 23b is inclined so that the outer peripheral side is separated from the rotation surface. For this reason, the airflow flowing into the housing 21 comes into contact with the blade 23 at a smaller crossing angle than in the first embodiment. Accordingly, dust accumulated on the blade 23 can be further reduced.

  The edge 23b of the blade 23 may be inclined so that the outer peripheral side approaches the axial direction from the intake port 21a with respect to the inner peripheral side. Thereby, when the edge 23b extends in the radial direction, the angle of intersection with the airflow is larger than that of the first and second embodiments but smaller than that of the conventional embodiment, and dust accumulation can be reduced.

The configuration of this embodiment is summarized as follows.
(1) The airflow flowing into the intake port 21c is along the rotation surface, and the inflow direction and the rotation axis are substantially perpendicular.
(2) The edge 23b on the upstream side of the blade 23 and the rotating shaft are inclined so that the outer peripheral side is separated from the air inlet 21c in the axial direction when viewed from the side.
(3) The airflow flowing into the intake port 21 c flows along the edge 23 b of the blade 23.
(4) The blade 23 is provided perpendicular to the rotation surface, and the upstream end is not inclined forward in the rotation direction.

  Next, the air conditioner of 3rd Embodiment is demonstrated. FIG. 9 is a schematic side sectional view showing the fan unit 20 of the air conditioner cleaning apparatus 10 of the present embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. The air conditioner of this embodiment differs in the shape of the fan 22 and the inlet port 21a of the cleaning apparatus 10 with respect to 1st Embodiment. Other parts are the same as those in the first embodiment.

  The housing 21 of the fan unit 20 of the present embodiment is provided with a disc 21d on the axis of the fan 22, and the air inlet 21a is formed in an annular shape. The fan 22 is a centrifugal fan, and a blade 23 perpendicular to the rotation surface is provided on the bottom plate 22a. An edge 23a on the inner peripheral side of the blade 23 is disposed on the inner side of the inner edge of the air inlet 21a and does not contact the airflow from the air inlet 21a.

  An edge 23 b of the blade 23 facing the air inlet 21 a is formed so as to extend in the radial direction substantially parallel to the rotational surface of the fan 22. Thus, the end edge 23b is formed to extend from the inner edge to the outer edge of the air inlet 21a. Accordingly, the blade 23 has an edge 23b on the upstream side with respect to the airflow flowing from the suction port 21a.

  According to the present embodiment, as in the first embodiment, the crossing angle between the airflow traveling direction and the upstream edge 23 b of the blade 23 becomes small. Therefore, dust accumulated between the edge 23b of the blade 23 of the cleaning device 20 and the blade 23 can be easily reduced. In addition, you may incline the edge 23b of the braid | blade 23 similarly to 2nd Embodiment.

The configuration of this embodiment is summarized as follows.
(1) The airflow flowing into the intake port 21c is along the rotation surface, and the inflow direction and the rotation axis are substantially perpendicular.
(2) The edge 23b on the upstream side of the blade 23 and the rotating shaft are substantially vertical when viewed from the side.
(3) The inflow direction of the airflow flowing into the intake port 21c and the edge 23b of the blade 23 are substantially parallel when viewed from the side.
(4) The blade 23 is provided perpendicular to the rotation surface, and the upstream end is not inclined forward in the rotation direction.

  Next, the air conditioner of 4th Embodiment is demonstrated. 10 and 11 are a schematic perspective view and a schematic side view showing the fan 22 of the cleaning device 10 for an air conditioner according to the present embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 10 and 11, only one blade 23 is shown in order to clearly show the shape of the blade 23, and other plural blades 23 that are originally present are omitted. The air conditioner of this embodiment differs in the shape of the braid | blade 23 of the cleaning apparatus 10 with respect to 1st Embodiment. Other parts are the same as those in the first embodiment.

  The blade 23 of the fan 22 extends outward from the peripheral surface of the boss 22b and has a curved surface inclined with respect to the rotation surface. With respect to the inclination direction of the blade 23, the suction port 21c side is the rear of the rotation direction R, and the bottom surface 21b side is the front of the rotation direction R. For this reason, as shown in FIG. 11, an angle α formed by the inclination direction D of the end portion on the suction side of the blade 23 and the rotation direction R of the blade 23 forms an obtuse angle. Thereby, when the dust that has flowed into the airflow collides with the end edge 23b, the inclination direction D of the end portion on the suction side of the blade 23 is directed to the so-called escape direction with respect to the rotation direction R. For this reason, dust is not pressed against the edge 23b.

  Therefore, according to the present embodiment, the same effect as that of the first embodiment can be obtained, and the pressing force at the time of collision between the dust and the edge 23b of the blade 23 caused by the rotation of the fan 22 can be reduced. Therefore, dust adhering to the blade 23 can be further reduced.

  In addition, the blade shape of this embodiment is not restricted to the shape of FIG. 10, FIG. For example, as shown in FIG. 12, the planar blade 23 may be inclined such that the suction port 21 c side is the rear in the rotation direction R and the bottom surface 21 b side is the front in the rotation direction R. As shown in FIG. 13, only the vicinity of the edge 23b of the blade 23 may be inclined. Further, as shown in FIG. 14, the pressure surface 23c on the edge 23b side may be inclined by forming a chamfer 23d.

The configuration of this embodiment is summarized as follows.
(1) The airflow flowing into the intake port 21c is along the rotation surface, and the inflow direction and the rotation axis are substantially perpendicular.
(2) The edge 23b on the upstream side of the blade 23 and the rotating shaft are substantially vertical when viewed from the side.
(3) The inflow direction of the airflow flowing into the intake port 21c and the edge 23b of the blade 23 are substantially parallel when viewed from the side.
(4) The upstream end of the blade 23 is inclined rearward in the rotational direction.

  In 1st-4th embodiment, although the discharge place of dust is made outdoors, it is not limited to this. For example, in the indoor unit 1 installed in a room that does not have a wall facing the outdoors, it may be difficult to guide the exhaust path 28 to the outside. For this reason, you may discharge | emit dust via the exhaust port 21c toward the dust box arrange | positioned indoors. Thereby, the effort of the periodic cleaning of the filter 2 can be reduced. Providing the dust box in the indoor unit 1 is more desirable because it is good in terms of appearance and installation space.

  Moreover, although the cleaning apparatus 10 is intended for removal of dust collected and accumulated by the filter 2, it is not limited thereto. You may clean the component arrange | positioned by the cleaning apparatus 10 at the distribution | circulation path | routes of conditioned air, such as an exterior panel, the heat exchanger 3, the ventilation fan which ventilates conditioned air, and a louver. The dust adhering to the filter 2 and the exterior panel adsorbs a large amount of oil present in the room, and the dust adhering to the heat exchanger 3, the blower fan, the louver and the like contains a lot of moisture due to condensed water especially during cooling. For this reason, in any case, adhesion of the fan 22 of the cleaning device 10 to the blade 23 is likely to occur. Also in these cases, dust adhering to the blade 23 can be reduced by the same cleaning device 10 as in the above embodiments.

  The fan 22 may be formed not only by a centrifugal fan but also by an axial fan or a diagonal fan. In this case as well, dust accumulation can be reduced by extending the upstream edge of the blade 23 in contact with the airflow flowing in from the air inlet 21a in the radial direction.

  In addition, as shown below, it is possible to reduce dust accumulation by arrangement | positioning of the blade 23 irrespective of the direction of the airflow which flows in from the inlet port 21c. FIG. 15 shows a sectional view of the blade 23 including the same arrangement as in the first to third embodiments, and FIG. 16 shows a sectional view of the blade 23 including the same arrangement as in the fourth embodiment (FIG. 12). ing. In these drawings, the arrangement of the blades 23 is not limited to the centrifugal fan but includes an axial flow fan and a mixed flow fan. 17 and 18 are cross-sectional views showing the arrangement of the blades 23 of the comparative example.

  15 shows the direction of the resultant force F of the ram pressure received on the pressure surface 23c by the rotation of the blade 23 and the centrifugal force applied to the blade 23, and the upstream edge 23e of the blade 23 (corresponding to 23b in FIGS. 7 to 9). ) To the direction E in which the pressure surface 23c extends is 90 °. 16, the angle θ between the direction of the combined force F and the direction E in which the pressure surface 23c extends from the upstream edge 23e of the blade 23 (corresponding to 23b in FIG. 12) is an obtuse angle.

  FIG. 17 includes a blade 23 similar to the conventional example shown in FIG. 19 described above, and an upstream edge 23e of the blade 23 corresponds to 23a in FIG. 19, and the same angle θ is an acute angle. In FIG. 18, the same angle θ is an acute angle.

  As shown in the comparative example, when the angle θ becomes an acute angle, the ram pressure and centrifugal force received by the end edge 23e become positive pressure (force in a direction in which dust is pressed against the end edge 23e). For this reason, dust easily accumulates on the edge 23e. On the other hand, by setting the angle θ to 90 ° or more (FIGS. 15 and 16), the ram pressure and centrifugal force received by the upstream edge 23e of the blade 23 are 0 or negative pressure (dust is applied to the edge 23e). Force to peel off). Therefore, even if the pressing force due to the flow velocity of the air current is applied to the end edge 23e, dust accumulated on the end edge 23e can be reduced.

  In consideration of the flow velocity of the airflow, when the fan 22 is a centrifugal fan, it is advantageous that the airflow flowing into the air inlet 21c is as close to a right angle as possible with respect to the rotation axis of the fan 22. In other words, it is preferable to make the angle as small as possible with respect to the rotation surface of the blade 23. For this purpose, it is necessary to suppress the height of the airflow flowing in from the duct (side surface portion 25d) in the fan axial direction. Further, when the fan 22 is composed of a mixed flow fan or an axial flow fan, such a restriction can be eliminated.

  According to this embodiment, it can utilize for the air conditioner provided with the cleaning apparatus which cleans a filter.

The perspective view which shows the inside of the air conditioner of 1st Embodiment of this invention. The perspective view which shows the inside of the air conditioner of 1st Embodiment of this invention. The perspective view which shows the fan unit of the cleaning apparatus of the air conditioner of 1st Embodiment of this invention. The perspective view which shows the fan unit of the cleaning apparatus of the air conditioner of 1st Embodiment of this invention. The perspective view which shows the fan of the cleaning apparatus of the air conditioner of 1st Embodiment of this invention. The top view which shows the fan of the cleaning apparatus of the air conditioner of 1st Embodiment of this invention. 1 is a schematic side sectional view showing a fan unit of a cleaning device for an air conditioner according to a first embodiment of the present invention. The schematic side sectional view showing the fan unit of the cleaning device of the air harmony machine of a 2nd embodiment of the present invention. The schematic side sectional drawing which shows the fan unit of the cleaning apparatus of the air conditioner of 3rd Embodiment of this invention. The perspective view which shows the fan of the cleaning apparatus of the air conditioner of 4th Embodiment of this invention. The side view which shows the fan of the cleaning apparatus of the air conditioner of 4th Embodiment of this invention. The side view which shows the other shape of the fan of the cleaning apparatus of the air conditioner of 4th Embodiment of this invention. The side view which shows the other shape of the fan of the cleaning apparatus of the air conditioner of 4th Embodiment of this invention. The side view which shows the other shape of the fan of the cleaning apparatus of the air conditioner of 4th Embodiment of this invention. Sectional drawing explaining arrangement | positioning of the braid | blade of the cleaning apparatus of the air conditioner of this invention Sectional drawing explaining arrangement | positioning of the braid | blade of the cleaning apparatus of the air conditioner of this invention Sectional drawing explaining arrangement | positioning of the braid | blade of the cleaning apparatus of the air conditioner of the comparative example of this invention Sectional drawing explaining arrangement | positioning of the braid | blade of the cleaning apparatus of the air conditioner of the comparative example of this invention Schematic side sectional view showing a fan unit of a conventional air conditioner cleaning device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Indoor unit 2 Filter 3 Heat exchanger 4 Filter drive motor 5 Outlet 6 Louver 10 Cleaning device 20 Fan unit 21 Housing 21a Intake port 21b Bottom plate 21c Exhaust port 22 Fan 22b Boss 23 Blade 23a, 23b, 23e Edge 23c Pressure surface 24 fan motor 25 suction path 25a front part 25b side part 26 brush motor 27 rotating brush 28 exhaust path

Claims (7)

  In an air conditioner including a cleaning device that sucks and removes dust from a component in which dust in indoor air that is taken into the indoor unit accumulates, the cleaning device includes a fan that rotates with a plurality of blades, A housing that houses the fan and has an intake port and an exhaust port, and a suction path that has a suction port facing the component and is connected to the intake port, along the rotation surface of the blade An air conditioner in which an airflow is caused to flow into the housing from the air inlet, and an upstream edge of the blade with respect to the airflow flowing from the air inlet extends in a radial direction.   The air conditioner according to claim 1, wherein the fan is a centrifugal fan.   3. The air conditioner according to claim 1, wherein the edge of the blade is substantially parallel to a rotation surface of the fan or an outer peripheral side thereof is separated from the intake port in an axial direction with respect to an inner peripheral side. .   2. The fan according to claim 1, wherein the fan has a boss disposed at the center of rotation and close to the air inlet, and the blade extends from a peripheral surface of the boss to an outer edge of the air inlet. Item 4. The air conditioner according to any one of Items 3.   The said housing has a disk on the axis | shaft of the said fan, forms the said inlet port cyclically | annularly, and the said blade is extended and formed from the inner edge to the outer edge of the said inlet port. Item 4. The air conditioner according to any one of Items 3.   6. The air conditioner according to claim 4, wherein the blade has an end face opposite to the air inlet side connected by an annular ring.   The air conditioner according to any one of claims 1 to 6, wherein the component part comprises a filter that collects dust in indoor air taken into the indoor unit.

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