JP4951972B2 - Fan unit for air conditioner - Google Patents

Description

  The present invention relates to an air conditioner, and more particularly to a fan unit used in an air conditioner or the like that automatically cleans an air filter.

  In a conventional air conditioner filter device, an air filter is provided on the front surface of the heat exchanger to prevent dust from entering the inside of the main body of the air conditioner. It is configured to be detachable so that it can be cleaned.

  The filter device with such a configuration not only requires frequent maintenance, but also gradually clogs the air filter until the maintenance is performed, and as a result, the air volume passing through the heat exchanger As a result, the air-conditioning capacity decreases, leading to an increase in power consumption.

For this reason, for the purpose of reducing the maintenance work of the air filter, it is preferable as an automatic cleaning device for the air filter that the dust adhering to the air filter is sucked and cleaned by the dust suction device through the suction nozzle. An automatic cleaning device for discharging outside the room has been devised (for example, see Patent Document 1).
JP-A-6-74521

  However, the dust adhering to the air filter is sucked and cleaned by the dust suction device through the suction nozzle, and the sucked dust is discharged outside, but the dust sucked by the fan of the dust suction device adheres to and accumulates on the fan surface. Thus, there is a problem that the suction air volume of the dust suction device is reduced, the dust suction performance is lowered, and in the worst case, the dust suction may be impossible.

  The present invention solves the above-described conventional problems, and prevents dust accumulation due to adhesion of dust sucked by the fan of the dust suction device to the fan surface and reduces the suction air volume of the dust suction device. An object of the present invention is to provide a highly reliable indoor unit of an air conditioner that prevents a drop.

In order to solve the conventional problems, an indoor unit of an air conditioner according to the present invention includes a fan having a plurality of blades arranged on a circumference, and a casing for housing the fan, and an inner edge of the blade. providing at least one rib section the casing in the vicinity, Rutotomoni provided with a projection extending toward the fan blades from the rib, said rib forms a bent shape in an L-shape, and casing inner edge And a plurality of protrusions are provided on the surface of the rib . The extension portion extends inward in the radial direction from the extension portion, and the bent portion is bent from the extension portion .

  As a result, even if the dust adhering to the air filter is sucked by the dust suction device through the suction nozzle and adheres to the surface of the blade constituting the fan, the dust adhering to the blade surface is projected by the rotation of the blade. The dust suction performance of the dust suction device is prevented by reducing the suction air volume of the dust suction device due to the accumulation of dust due to the adhesion of the dust onto the blade surface. This makes it possible to provide a highly reliable indoor unit for an air conditioner.

  ADVANTAGE OF THE INVENTION According to this invention, the fall of dust suction performance can be prevented by preventing the fall of the suction | attraction air volume of the dust suction apparatus accompanying the deposition by the adhesion of the dust to the blade surface of the dust suction apparatus of an air conditioner.

A first invention is a fan unit provided in an air conditioner, comprising a fan having a plurality of blades arranged on a circumference, and a casing for housing the fan, and is provided in the vicinity of an inner edge portion of the blade. providing at least one rib in the casing, Rutotomoni provided with a projection extending toward the fan blades from the rib, said rib forms a bent shape in an L-shape, and radially from the casing inner edge While having the extension part extended inward and the bending part bent from the said extension part, the said projection part is provided with two or more on the surface of the said rib .

As a result, even if the dust adhering to the air filter is sucked by the dust suction device through the suction nozzle and adheres to the surface of the blade constituting the fan, the dust adhering to the blade surface is projected by the rotation of the blade. Dust suction due to the accumulation of dust on the blade surface due to the separation and separation of the dust from the blade surface without causing dust to get caught in the gap between the blade and the rib. By preventing a reduction in the suction air volume of the apparatus, it is possible to prevent a reduction in dust suction performance and to provide a highly reliable indoor unit of an air conditioner. In particular, dust attached to the blade can be peeled off and removed with a simple configuration, and even if dust adheres to any part of the blade, the protrusion acts and the dust attached to the blade Can be peeled off and released.

  According to a second aspect of the invention, in particular, the rib of the first aspect of the invention is configured such that the corner portion between the first surface on the upstream side of the bent portion in the rotation direction of the blade and the second surface of the bent portion facing the blade. Is set to an acute angle.

  As a result, the dust attached to the blade acts so that the acute angle portion is easily hooked, and the dust attached to the blade can be peeled off and separated.

In the third invention, in particular, the center line of the protrusions of the first and second inventions is extended so as to intersect with the rotation axis of the fan blade.

  As a result, the dust attached to the blade acts so that the protrusions can be easily caught, and the dust attached to the blade can be peeled off and separated.

In the fourth invention , in particular, the protrusions of the first to third inventions have a needle-like shape.

  As a result, the dust adhered to the blade acts so that the protrusions can be more easily hooked, and the dust adhered to the blade can be peeled off and separated.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a front external view of an indoor unit of an air conditioner according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line II of the indoor unit, and FIG. FIG. 4 is a schematic perspective view of a dust suction device provided in the indoor unit, FIG. 5 is a perspective view of a main part of the dust suction device provided in the indoor unit, and FIG. FIG. 7 is a schematic diagram of a main part of a dust suction device provided in the same indoor unit, and FIG. 7 is a schematic sectional view of the dust suction device provided in the same indoor unit.

As shown in FIGS. 1 to 3, a heat exchanger 20 is disposed inside the indoor unit 1, and an air filter 2 that removes dust passing through the heat exchanger 20 is disposed. In the vicinity of the side surface in the indoor unit 1,
A dust suction device 3 for sucking and discharging dust adhering to the air filter 2 is installed.

  A suction nozzle 6 is connected to a suction side portion (suction duct connection port 4) of the dust suction device 3 via a bellows-shaped suction duct 5 and a blow-out side portion (exhaust duct connection) of the dust suction device 3 An exhaust duct 8 whose tip communicates with the outside is connected to the mouth 7).

  A plurality of suction holes 6a are formed side by side on the surface of the suction nozzle 6 facing the air filter 2 from the upper surface portion to the front surface portion of the air filter 2, and from each suction hole 6a by a suction operation of the dust suction device 3 described later. The air filter 2 is configured to be able to suck dust.

  As shown in FIGS. 4 to 7, the dust suction device 3 includes a centrifugal fan 10 that is rotated by an intake / exhaust motor 9, a casing 11 that houses the fan 10, and a windward side of the casing 11. It has the suction cover 12 provided integrally with the casing part 11, and the attachment board | substrate 13 to which the casing part 11 etc. are attached.

  The fan 10 has a plurality of blades 21 arranged circumferentially, and the blades 21 rotate in the direction of arrow B in FIG.

  In this configuration, the intake / exhaust motor 9 is rotated forward for suction and the nozzle driving motor 14 is driven. Then, in a state where the dust suction device 3 is activated, the suction nozzle 6 moves along the windward surface of the air filter 2, and at this time, dust adhering to the air filter 2 together with air passes through the suction hole 6 a and the suction nozzle 6. The dust sucked in and sucked into the dust suction device 3 from the suction duct 5 is discharged out of the room together with air through the exhaust duct 8. The air and dust sucked into the dust suction device 3 flow according to the direction of arrow C in FIG.

  Here, when used for a long time, as shown in FIG. 6, there is a possibility that the dust A adheres to and accumulates on the surface of the blade 21 constituting the fan 10.

  For this reason, in the embodiment of the present invention, as shown in FIGS. 5 to 7, the rib 15 extending from the casing portion 11 that houses the fan 10 is provided, and the rib 15 is further provided with the protruding portion 25.

  The ribs 15 and the protrusions 25 are provided in the vicinity of the inner peripheral surface of the plurality of blades 21 constituting the fan 10.

  In other words, the ribs 15 are arranged at a predetermined distance from the tip on the inner peripheral side of the blade 21, and the protrusions 25 are provided in the separated gaps.

  Here, at least one rib 15 and protrusion 25 may be provided, and a plurality of ribs 15 and protrusions 25 may be provided in view of the suction air volume of the dust suction device.

  With the above configuration, dust adhering to the air filter 2 is sucked by the dust suction device 3 through the suction nozzle 6, and even if dust A adheres to the surface of the blade 21 constituting the fan 10, The dust A adhering to the surface of the blade 21 comes into contact with the ribs 15 and the protrusions 25, and the dust A is peeled off and separated from the surface of the blade 21.

  The separated and separated dust A is discharged together with air through the exhaust duct 8 to the outside by the suction force of the dust suction device 3.

  Therefore, by preventing a reduction in the suction air volume of the dust suction device 3 due to the accumulation of dust A on the blade 21 surface, a reduction in the suction performance of the dust A can be prevented, and a highly reliable indoor unit of an air conditioner. Can be provided.

  In the above-described configuration, the rib 15 is configured to extend from the casing portion 11 in which the fan 10 is accommodated. However, as illustrated in FIGS. As a result, the rib 15 can be arranged at a predetermined position from the casing portion 11 with a simple configuration.

  Further, in the above configuration, as shown in FIG. 6, an acute angle portion 23 is provided in which the shape of the position of the rib 15 facing the B direction which is the rotation direction of the blade 21 constituting the fan 10 is an acute angle α. .

  As a result, when the blade 21 rotates, when the dust A attached to the surface of the blade 21 comes into contact with the rib 15, the dust A attached to the blade 21 acts so that the acute angle portion 23 can be easily hooked. The dust A adhering to 21 can be peeled and removed.

  Further, in the above configuration, as shown in FIG. 6, the center line of the protrusion is extended so as to intersect with the rotation axis of the fan blade.

  As a result, when the blade 21 rotates, the dust A attached to the surface of the blade 21 comes into contact with the ribs 15, so that the apex 24 more easily catches the dust A attached to the blade 21. The dust A adhering to the blade 21 can be peeled and removed.

  In the above configuration, although not shown, a plurality of protrusions are provided on the surface of the rib.

  As a result, when the blade 21 rotates, the dust A attached to the surface of the blade 21 comes into contact with the ribs 15, so that the apex 24 more easily catches the dust A attached to the blade 21. The dust A adhering to the blade 21 can be peeled and removed.

  Moreover, in the said structure, as shown in FIG. 6, a projection part is made into the shape of a needle.

  As a result, when the blade 21 rotates, the dust A attached to the surface of the blade 21 comes into contact with the ribs 15, so that the apex 24 more easily catches the dust A attached to the blade 21. The dust A adhering to the blade 21 can be peeled and removed.

  As described above, the indoor unit of an air conditioner according to the present invention can be applied to devices installed in an environment that has an air filter and can be exhausted outside the room, in addition to the air conditioner.

Front external view of an indoor unit of an air conditioner according to Embodiment 1 of the present invention Sectional view taken along line I-I of the indoor unit of the air conditioner according to Embodiment 1 of the present invention. The perspective view which showed the structure regarding the air filter of the indoor unit of the air conditioner in Embodiment 1 of this invention, and its cleaning mechanism. 1 is a schematic perspective view showing a dust suction device for an indoor unit of an air conditioner according to Embodiment 1 of the present invention. The principal part perspective view which shows the dust suction device of the indoor unit of the air conditioner in Embodiment 1 of this invention Schematic diagram of a main part showing a dust suction device for an indoor unit of an air conditioner according to Embodiment 1 of the present invention. Schematic sectional view showing a dust suction device for an indoor unit of an air conditioner according to Embodiment 1 of the present invention.

DESCRIPTION OF SYMBOLS 1 Indoor unit 2 Air filter 3 Dust suction apparatus 4 Suction duct connection port 5 Suction duct 6 Suction nozzle 6a Each suction hole 7 Exhaust duct connection port 8 Exhaust duct 9 Suction / exhaust motor 10 Fan 11 Casing part 12 Suction cover 13 Mounting board 14 Nozzle Driving motor 15 Rib 21 Blade 23 Acute angle portion 24 Apex angle portion 25 Projection portion

Claims (4)

A fan unit provided in an air conditioner, comprising: a fan having a plurality of blades arranged on a circumference; and a casing that houses the fan, wherein at least one of the casings near an inner edge of the blade A rib is provided, a protrusion extending from the rib toward the blade of the fan is provided, and the rib is bent in an L shape, and extends radially inward from the casing inner edge. A fan unit for an air conditioner having a protruding portion and a bent portion bent from the extending portion, and a plurality of the protruding portions extending from the bent portion and provided on a surface of the rib. The rib is characterized in that the angle of the corner between the first surface upstream of the bent portion in the rotation direction of the blade and the second surface of the bent portion facing the blade is set to an acute angle. The fan unit for an air conditioner according to claim 1. The fan unit for an air conditioner according to claim 1 or 2, wherein a center line of the protruding portion extends so as to intersect with a rotation axis of the fan blade. The fan unit for an air conditioner according to any one of claims 1 to 3, wherein the protrusion has a needle shape.

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