JP2008111568A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner having a filter cleaning function for automatically cleaning dust on a filter, preventing dust blockage on a fan blade face and in a circulating circuit of a suction exhaust device, and having resistance to dust clog. <P>SOLUTION: This air conditioner comprises a dust removing means for removing dust on the filter, and the suction exhaust device connected with the dust removing means, the suction exhaust device has a swirl fan rotated and driven by a motor capable of changing its rotating direction (rotatable in forward and backward directions), and the dust blockage can be prevented by switching a rotational frequency of the motor when the fan is locked because of dust blockage. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an air conditioner having a filter cleaning function for automatically cleaning dust on a filter.

  As a conventional technique of this type, as shown in FIG. 5, a movable suction nozzle is arranged on the windward side of the filter, and a suction / exhaust device that sucks and exhausts dust from the suction nozzle is arranged. The exhaust device is formed of a vortex fan with a built-in motor and a casing surrounding the vortex fan, the suction port of the casing is connected to a suction duct communicating with the suction nozzle, and the blowing of the casing Dust can be discharged by communicating with an exhaust duct that exhausts the mouth to the outside. (For example, see Japanese Patent Application No. 2006-125532 for an unpublished company application)

However, the conventional configuration has the following problems.
In the conventional configuration described above, by using the vortex fan, the flow hardly passes between the fan inner blades, and only the flow passes through the periphery of the fan as the fan rotates. Since it is small, it has a form in which dust accumulation on the fan is small. However, since the wind flow of the vortex fan passes through the periphery of the fan in the rotational direction as described above, the suction port and the discharge port exist in the same circulation circuit, and it is necessary to seal between them. However, since the fan is a rotating body, complete sealing is impossible, and it is necessary to set and seal the space distance between the blade surface and the circulation circuit as much as possible. When a vortex fan is used to remove dust, dust accumulation on the fan is small, but dust accumulates because the circulation circuit of the seal part is narrow, and if the state continues, dust clogging will occur in the seal part. Become.

  The present invention solves the above-mentioned conventional problems, has a filter cleaning function for automatically cleaning dust on the filter, and prevents air from being clogged on the fan blade surface and the distribution circuit of the suction exhaust device. The purpose is to provide a harmony machine.

  In order to solve the above-described conventional problems, in an air conditioner provided with a heat exchanger and a suction grill, a filter is provided between the heat exchanger and the suction grill to remove dust adhering to the filter. And a suction exhaust device for sucking and exhausting the removed dust. The suction exhaust device includes a motor, a vortex fan, and a substantially U-shaped casing for housing the vortex fan. The suction port of the thing is connected to the dust removing means through the suction duct, and the blowing port of the casing is connected to an exhaust duct that exhausts the outside of the room, so that the motor can be rotated forward and backward.

  With the above configuration, when the seal portion in the substantially U-shaped casing is clogged with dust, it is possible to scrape dust from the seal portion by rotating the vortex fan in the reverse direction.

  The present invention relates to an air conditioner, and relates to a filter cleaning function that automatically cleans dust on a filter, and can provide an air conditioner that prevents dust from being clogged in a suction / exhaust device.

  1st invention is the air conditioner which provided the heat exchanger and the suction grille, provided a filter between the heat exchanger and the suction grille, dust removal means for removing dust adhering to the filter, A suction exhaust device for sucking and exhausting the removed dust, the suction exhaust device comprising a motor, a vortex fan, and a substantially U-shaped casing that houses the vortex fan; The rotation direction of the eddy current fan is connected to the dust removing means through a suction duct, the blowing outlet of the casing is connected to an exhaust duct for exhausting the outside of the room, and the motor is a motor capable of forward and reverse rotation. By rotating the vortex fan in the reverse direction when the seal part in the substantially U-shaped casing is clogged with dust It is possible to scrape the dust from Lumpur portion.

  As a result, a filter cleaning device capable of exhaust ventilation that prevents the exhaust device from being clogged with dust can be realized.

  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)
1 is a cross-sectional view of an air conditioner according to an embodiment of the present invention, FIG. 2 is a perspective view thereof, FIG. 3 is a perspective view of a suction exhaust device, and FIG. 4 is a detailed explanatory view of a vortex fan.

  The air conditioner indoor unit 1 has a heat exchanger 2 and a main body blower fan 3, sucks dust adhering to the filter 4 of the indoor unit 1, and moves the suction nozzle 5 that moves to the left and right of the filter 4 to the filter 4. A suction / exhaust device 6 that is disposed on the windward side and further sucks and exhausts dust is disposed on the side surface of the indoor unit 1.

  Further, the suction nozzle 5 and the suction exhaust device 6 are connected by a suction duct 7, and there is an exhaust duct 8 connected from the suction exhaust device 6 to the outdoors.

  The suction / exhaust device 6 includes a substantially U-shaped casing 11 having a suction port 9 through which air flows in and a discharge port 10 through which air flows out, a vortex fan 12 having a plurality of blades for conveying and pressure-inflowing air, A motor 19 that rotates the vortex fan and a seal portion 13 that separates the suction port 9 and the discharge port 10 are formed.

  Further, the suction port 9 is connected to the suction duct 7, and the discharge port 10 is connected to the exhaust duct 8.

  Next, the operation will be described.

  When the suction / exhaust device 6 is operated, dust on the filter 4 is sucked into the suction nozzle 5 through the suction port 51 opened on the filter 4 side of the suction nozzle 5 on the upstream side of the filter 4, Thereafter, the air is sucked into the suction / exhaust device 6 through the suction duct 7 through the suction duct 7.

Thereafter, the dust is increased in pressure by the rotation of the vortex fan 12 in the suction exhaust device 6, and is discharged to the outdoors from the discharge port 10 through the exhaust duct 8.
The suction nozzle 5 can move left and right along the filter 4 to clean the entire surface of the filter 4.

The opening 17 provided with the damper mechanism 16 is closed during the dust suction and discharge, and forms the dust flow path as described above. At the time of ventilation, the opening 17 is opened by the damper mechanism 16, and the ventilation air volume can be increased by flowing a large amount of air from here.

  Next, the operation of the vortex fan 12 will be described.

  That is, in FIG. 4, the air flowing in from the suction port 9 is gradually pressurized by the action of the vortex fan 12 having a plurality of blades 14 while flowing along the flow path 15 in the casing 11, It is discharged from the discharge port 10.

  In such a vortex fan 12, when dust flows in from the suction port 9 as shown in the drawing, dust heavier than air flows along the outside of the flow path 15 due to centrifugal force, and some dust flows from the discharge port 10. It is not discharged and reaches the seal portion 13 along the flow of the wind. Since the gap between the fan blade surface and the casing 11 is set narrow in order to isolate the suction port 9 and the discharge port 10 in the seal part 13, dust is voluminous and dust clogging may occur in the seal part 13. is there.

  In this case, by changing the rotation direction of the motor 19 and rotating the rotation direction of the vortex fan 12 in the reverse direction, it is possible to scrape the dust clogged in the seal portion 13.

  The reverse rotation operation of the vortex fan 12 at the time of dust clogging as described above must be performed when the vortex fan 12 cannot perform forward rotation operation due to dust clogging, that is, when the fan is locked. When the motor 19 becomes abnormal due to an abnormal current or the like, the motor 19 is reversely rotated.

  In order to change the rotation direction of the motor 19 as described above, the motor 19 can be easily changed to a three-phase motor.

  Further, when the rotation direction is changed, a counter electromotive current is generated in the motor 19. Therefore, it is desirable to perform a protective operation in order to eliminate electrical destruction of the motor 19. After the rotation of the motor 19 is temporarily stopped, the motor 19 is reversely driven. Alternatively, when the rotation of the motor 19 is temporarily stopped and the inertial rotation is performed, the motor 19 is reversely driven after a time during which the rotation speed is reduced to a rotation speed that causes a counter electromotive current that does not cause destruction. Further, in the case where the rotational speed control of the motor 19 is constantly detected, a protective operation is performed such that the motor 19 is driven in reverse rotation after the rotational speed has decreased to a rotational speed that is a counter electromotive current that does not cause destruction.

  As described above, the air conditioner according to the present invention includes a filter between the heat exchanger and the suction grill, at least inside the indoor unit of the air conditioner provided with the heat exchanger and the suction grill, An air conditioner that sucks dust adhering to the filter, disposes a movable suction nozzle on the windward side of the filter, and further arranges the suction exhaust device for sucking and exhausting dust from the suction nozzle, The suction exhaust device is formed of a motor, a vortex fan, and a substantially U-shaped casing for housing the vortex fan, and connects the suction port of the casing to the dust removing means through a suction duct. The exhaust port is connected to an exhaust duct that exhausts the air to the outside so that dust can be discharged, and the motor can be changed in rotation direction. Forward rotation the direction of rotation of the vortex fan, which is constituted so as to be able to change the reverse rotation.

With the above configuration, when the seal part in the substantially U-shaped casing is clogged with dust, it becomes possible to scrape the dust out of the seal part by rotating the vortex fan in the reverse direction. In addition to a machine, the present invention can be widely applied to a filter cleaning apparatus in a general apparatus having a blower and a filter.

Sectional drawing of the air conditioner in embodiment of this invention The perspective view of the air conditioner in embodiment of this invention The perspective view of the suction exhaust apparatus in embodiment of this invention Flow explanatory diagram of a vortex fan in an embodiment of the present invention Plan view of conventional suction exhaust system

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Air conditioner indoor unit 2 Heat exchanger 3 Main body ventilation fan 4 Filter 5 Suction nozzle 6 Suction exhaust device 7 Suction duct 8 Exhaust duct 9 Suction port 10 Discharge port 11 Casing 12 Eddy current fan 13 Stripper part 14 Blade 15 Flow path 16 Damper Mechanism 17 Opening 19 Motor 51 Suction port 114 Sirocco fan 115 Casing

Claims (5)

In an air conditioner provided with a heat exchanger and a suction grill, a filter is provided between the heat exchanger and the suction grill, dust removing means for removing dust adhering to the filter, and suction and removal of the removed dust. A suction exhaust device that exhausts the motor, the suction exhaust device comprising a motor, a vortex fan, and a substantially U-shaped casing that houses the vortex fan; and the suction inlet of the casing is connected via a suction duct The air conditioner is characterized in that the motor is connected to the dust removing means, and the casing outlet is connected to an exhaust duct for exhausting air outside the room, so that the motor is a motor that can be rotated forward and backward. The air conditioner according to claim 1, wherein the vortex fan is switched to a reverse rotation operation when the normal rotation operation becomes impossible due to a fan lock. 3. The air conditioner according to claim 1, wherein when the rotation direction of the vortex fan is switched, the rotation direction is switched after the rotation of the fan is stopped once and then driven. The air conditioner according to any one of claims 1 to 3, wherein, when the rotation direction of the vortex fan is switched, the rotation direction is switched and driven after a lapse of a fixed time after the rotation of the fan is stopped once. . When switching the rotational direction of the vortex fan, after the drive of the fan before switching is once stopped, the rotational direction is switched and driven after the rotational speed of the fan rotating by inertia falls below a predetermined rotational speed. The air conditioner according to any one of claims 1 to 4.

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