JP4860131B2 - Method for controlling dust suction device of air conditioner - Google Patents

Description

  The present invention relates to a method for controlling a dust suction device for an air conditioner that automatically cleans an air filter.

  In the conventional air conditioner, an air filter for preventing dust from entering the inside of the air conditioner main body is provided on the front surface of the heat exchanger, and this air filter can clean the attached dust by hand. It is configured so as to be detachable. The filter device with such a configuration not only requires frequent maintenance, but the air filter gradually clogs until maintenance is performed, resulting in a reduction in the amount of air passing through the heat exchanger. As a result, the air conditioning capacity is reduced, leading to an increase in power consumption.

For this reason, an automatic cleaning device has been devised that periodically cleans dust adhering to the air filter with a brush in order to reduce the maintenance work of the filter (see, for example, Patent Document 1).
JP-A-6-74521

  However, in the above prior art, since the brush and the air filter are rubbed against each other, there is a problem that dust is entangled with the brush or the brush is worn or deformed to deteriorate its function. Also, after a certain amount of time has passed, the dust collected by scraping with a brush must be treated, and the labor of maintenance has not been greatly reduced. From this point of view, a cleaning method is preferred as an automatic air filter cleaning device in which dust adhering to the filter is sucked and cleaned by a dust suction device through a suction nozzle, and the sucked dust is discharged to the outside.

  In such a method, the dust sucked into the fan of the dust suction device adheres and accumulates on the fan surface and 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 is not performed. There was a problem that it might be possible.

The present invention solves the above-mentioned conventional problems, and in an air conditioner having a filter device in which dust passes through a fan in the dust suction device , the dust sucked into the fan surface of the dust suction device is applied to the fan surface. An object of the present invention is to provide a highly reliable control method of a dust suction device of an air conditioner by preventing adhesion and accumulation and preventing a reduction in dust suction performance due to a reduction in the suction air volume of the dust suction device.

  In order to solve the above-described conventional problems, the method for controlling a dust suction device for an air conditioner according to the present invention periodically reverses the fan of the dust suction device.

  As a result, the dust attached to the fan surface is peeled and removed due to the centrifugal force during reverse rotation of the fan, so that the dust sucked into the fan surface of the dust suction device is attached to the fan surface and sucked by the dust suction device as it accumulates. By preventing a decrease in the air volume, it is possible to prevent a decrease in dust suction performance and to provide a highly reliable dust suction device for an air conditioner.

  The method for controlling a dust suction device for an air conditioner according to the present invention reverses the fan of the dust suction device periodically at a higher rotational speed than the forward rotational speed during dust suction.

  As a result, the dust adhering to the fan surface can be more effectively separated and separated by the effect of high centrifugal force due to the high-speed rotation during the reverse rotation of the fan. It is possible to provide a dust suction device for an air conditioner that can prevent a reduction in the suction air volume of the dust suction device that accompanies the accumulation, prevent a reduction in dust suction performance, and have high reliability.

  The method for controlling a dust suction device for an air conditioner according to the present invention provides a highly reliable dust suction device for an air conditioner, thereby reducing the amount of air passing through the heat exchanger due to clogging of the air filter. A decrease in air conditioning capability and an increase in power consumption can be prevented.

1st invention is a filter comprised by the air filter which removes the dust of the air which passes a heat exchanger, the suction nozzle movable along the said air filter , and the dust suction apparatus connected with the said suction nozzle In an air conditioner equipped with a device, by periodically rotating the fan of the dust suction device periodically, dust adhering to the fan surface is peeled off and released by the effect of centrifugal force during the reverse rotation of the fan. The dust suction device of the air conditioner with high reliability is prevented by preventing the dust suction performance of the dust suction device from decreasing due to the dust sucked by the fan of the device being attached to and accumulated on the fan surface. Can be provided.

  According to the second aspect of the invention, the fan of the dust suction device is periodically rotated backward at a higher rotational speed than the forward rotational speed when dust is sucked. Dust adhering to the fan surface is more effectively peeled off and separated, preventing dust sucked by the fan of the dust suction device from adhering to the fan surface and reducing the suction air volume of the dust suction device due to accumulation. It is possible to provide a dust suction device for an air conditioner that can prevent a reduction in the suction performance of the air conditioner and that is highly reliable.

  Embodiments of the present invention will be described below 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. 3 is II-II of the indoor unit. FIG. 4 is a perspective view showing a structure related to the air filter of the indoor unit and its cleaning mechanism, FIG. 5 is a simplified side view of a dust suction device provided in the indoor unit, and FIG. FIG. 7 is a schematic front sectional view of the dust suction device.

  As shown in FIGS. 1 to 3, the indoor unit 1 in this air conditioner is provided with a frame 2 that forms both side surfaces and a bottom surface portion, and a front portion and an upper surface portion of the indoor unit 1, and has a mesh-like filter. A main outer shell portion is constituted by an air filter 8 in which a large number of portions 8a are fitted in a filter frame 8b, an outer panel 4 attached to the front and upper sides of the air filter 8 so as to be openable and closable. The upper surface portion and the front surface portion of the outer panel 4 are respectively formed with suction portions 5 and 6 for sucking room air, and a blowing portion 7 is formed in front of the lower portion. In the air passage connecting the suction parts 5 and 6 and the blowing part 7 in the indoor unit 1, a blower fan comprising a heat exchanger 9 comprising the air filter 8 and two heat exchangers 9A and 9B and a cross flow fan. The air sucked from the suction portions 5 and 6 by the blower fan 10 passes through the air filter 8 and is cooled or heated by the heat exchanger 9, and then one of the air surrounding the blowout portion 7. The heat exchanger 9 </ b> A is disposed from the upper side to the front side of the blower fan 10, and the other heat exchanger 9 </ b> B is disposed from the upper side to the rear side of the blower fan 10. A rear guider 11 is provided in the vicinity of the back surface of the indoor unit 1 and a stabilizer 12 is provided at an end of the water tray 13 in order to smooth out the air sent by the blower fan 10. Reference numeral 14 denotes a wind direction changing blade.

  As shown in FIG. 4, a dust suction device 30 for sucking and discharging dust attached to the air filter 8 is installed near the side surface in the indoor unit 1. A suction nozzle 16 is connected to a suction side portion (suction duct connection port 31) of the dust suction device 30 via a bellows-shaped suction duct 15, and a blow-out side portion (exhaust duct connection) of the dust suction device 30. An exhaust duct 17 whose tip communicates with the outside is connected to the port 32).

The suction nozzle 16 is formed in a shape extending in the depth direction and the vertical direction so as to face the windward surface of the air filter 8, and the back end portion and the lower end portion thereof are the filter frame of the air filter 8. Guide grooves 8c and 8d formed in the upper back end and lower end of 8b
The air filter 8 is guided in a posture along the windward side of the air filter 8 so as to be movable left and right. The lower portion of the suction nozzle 16 is screwed to a screw shaft 18 arranged so as to extend left and right, and the screw shaft 18 is driven by a nozzle drive motor 21 via transmission gears 19 and 20. The suction nozzle 16 is moved left and right.

  A plurality of suction holes 16a are formed on the surface of the suction nozzle 16 facing the air filter 8 from the upper surface portion to the front surface portion of the air filter 8, and each suction hole 16a is moved by a suction operation of a dust suction device 30 described later. The air filter 8 is configured to be able to suck dust.

  The suction duct 15 that connects the suction nozzle 16 and the suction duct connection port 31 of the dust suction device 30 is partially bent so that the suction duct 15 can be sucked into the dust suction device 30 regardless of the position of the air filter 8 in the left-right direction. The flow path is formed well.

  As shown in FIGS. 5 to 7, the dust suction device 30 includes a centrifugal fan 34 that is rotated by an intake / exhaust motor 33, a casing 35 that houses the fan 34, and a casing 35 that is on the windward side of the casing 35. And a suction cover 36 provided integrally with the casing 35 and a mounting substrate 37 to which a casing 35 and the like are mounted.

  In this configuration, when the air filter 8 is cleaned, the intake / exhaust motor 33 is rotated forward for suction by performing a predetermined operation or the like (for example, by pressing a cleaning button). The drive motor 21 is driven. Then, in a state where the dust suction device 30 is activated, the suction nozzle 16 moves along the windward surface of the air filter 8. At this time, the dust attached to the air filter 8 together with air passes through the suction hole 16a and the suction nozzle 16 The dust sucked in and sucked into the dust suction device 30 from the suction duct 15 is discharged out of the room together with air through the exhaust duct 17. Thereby, the dust of the air filter 8 can be automatically discharged outside the room, and the maintenance work can be realized without the need for a person to clean the dust.

  Here, when used for a long period of time, dust may accumulate on the surface of the fan 34. Therefore, in the present invention, the fan 34 is periodically rotated in the reverse direction, and the dust adhering to the surface of the fan 34 is separated and separated by the centrifugal force during the reverse rotation of the fan. By preventing a reduction in the suction air volume of the dust suction device that accompanies and deposits on the surface, it is possible to prevent a reduction in dust suction performance and to provide a highly reliable dust suction device for an air conditioner. The timing of rotating the fan 34 in the reverse direction is not particularly limited, but after the dust suction of the air filter 8 as shown in the time chart of FIG. 8 or before the dust suction of the air filter 8 as shown in the time chart of FIG. 9 is started. Alternatively, any cycle that can prevent a decrease in dust suction performance may be used.

  Further, as shown in the time chart of FIG. 10, the fan 34 is periodically rotated in reverse at a rotation speed higher than the rotation speed at the time of forward rotation when dust is sucked, so that the fan 34 is effective due to the centrifugal force during the reverse rotation of the fan. By separating and separating the dust adhering to the surface, it is possible to prevent the dust sucked by the fan 34 from adhering to the surface of the fan 34 and to reduce the suction air volume of the dust suction device due to the accumulation, and the dust suction performance. It is possible to provide a dust suction device for an air conditioner that can prevent a decrease in the air conditioner. In this case as well, the reverse rotation cycle and time may be any cycle that can prevent a reduction in dust suction performance.

  The air conditioner according to the present invention can be applied not only to an air conditioner but also to a device that has an air filter and is installed in an environment that can be exhausted outdoors.

Front external view of an air conditioner indoor unit according to Embodiment 1 of the present invention Sectional view of the same indoor unit taken along line II II-II sectional view of the same indoor unit The perspective view which showed the structure regarding the air filter of the indoor unit, and its cleaning mechanism Simplified side view of intake / exhaust system installed in the indoor unit Perspective view of the dust suction device Schematic front sectional view of the dust suction device Control time chart of dust suction device in embodiment 1 of the present invention Control time chart of dust suction device in embodiment 1 of the present invention Control time chart of dust suction device in embodiment 1 of the present invention

DESCRIPTION OF SYMBOLS 1 Indoor unit 5, 6 Suction part 7 Outlet part 8 Air filter 9, 9A, 9B Heat exchanger 10 Blower fan 15 Suction duct 16 Suction nozzle 16a Suction hole 18 Screw shaft 21 Nozzle drive motor 30 Dust suction device 31 Suction duct connection Port 32 Exhaust duct connection port 33 Suction / exhaust motor 34 Suction / exhaust fan 35 Casing 36 Suction cover 38 Suction port

Claims (2)

An air filter for removing dust from the air passing through the heat exchanger, a suction nozzle movable along the air filter , and a dust suction device connected to the suction nozzle , wherein the dust is the dust suction device. in an air conditioner provided with the filter device pass the fan inner control method of the dust suction device of an air conditioner, characterized in that for periodically reverse the rotation of the fan of the dust suction device. 2. The method of controlling a dust suction device of an air conditioner according to claim 1, wherein the fan of the dust suction device is periodically reversely rotated at a higher rotational speed than the forward rotational speed during dust suction. .

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