WO2005026623A1

WO2005026623A1 - Air conditioner

Info

Publication number: WO2005026623A1
Application number: PCT/JP2004/013404
Authority: WO
Inventors: Yoshiki Izumi; Takashi Sugio; Tsutomu Shimizu
Original assignee: Matsushita Electric Industrial Co., Ltd.
Priority date: 2003-09-12
Filing date: 2004-09-08
Publication date: 2005-03-24
Also published as: CN100416167C; CN1833141A; KR20060073936A; JP3923067B2; JPWO2005026623A1; KR101049433B1

Abstract

An air conditioner sucking and discharging air into and from a room, comprising a suction nozzle (16) having a suction hole for sucking dirt adhered to an indoor unit (1), a suction/discharge device (30) disposed in the indoor unit (1), connected to the suction nozzle (16), and sucking air from the suction nozzle (16), and a discharge duct (17) having one end connected to the suction/discharge device (30) and the other end allowed to communicated with the outside of the room. Since dirt in the indoor unit (1) can be automatically discharged to the outside of the room, dirt cleaning operation must not be performed by a person and maintenance-free can be realized.

Description

Specification

Air Conditioner Technical Field

The present invention relates to an air conditioner capable of automatically cleaning an air filter. The air conditioner according to the present invention can be applied to equipment installed in an environment that can be exhausted outdoors, other than the air conditioner.

An air conditioner that blows air into a room after cooling or heating the air sucked by the blower fan with a heat exchanger, and to prevent dust floating in the air from entering the interior of the indoor unit, the back side of the suction unit Is provided with an air filter. If dust accumulates and accumulates on this air filter, the ventilation resistance increases and the COP (coefficient of performance = (cooling capacity required power)) of the indoor unit of the air conditioner decreases, increasing power consumption. Generally, the air filter is configured to be detachable so that the attached dust can be cleaned.

However, in such an air conditioner having a detachable air filter, the air filter can be removed from the indoor unit of the air conditioner in a relatively short period in accordance with the frequency of use of the air conditioner, and the air filter can be washed or washed. Maintenance work was required to clean the dust attached with a vacuum cleaner, etc., and there was a problem that it took a lot of trouble and time.

In order to deal with this problem, an air filter 50 as shown in FIGS. 13 and 14 has been proposed in Japanese Patent Application Laid-Open Publication No. 2000-194979.

In this air filter device 50, a belt-shaped air filter 51 is inserted into a room. Feed-out z arranged on the upper and lower parts of the inner machine

5 2 and 5 3, the air filter 5 1 and 5 8 are wound around the suction unit 5 7 and 5 8 from the back, and one shaft 5 3 is driven to rotate by a motor 5 4 or the like. Is configured to be movable up and down. In addition, a cleaning brush 55 for cleaning dust adhering to the air filter 51 is provided near the lower end of the location where the air filter 51 is disposed, and a cleaning brush 55 below the cleaning brush 55 is provided. In addition, a dust box 56 for collecting dust removed by the cleaning brush 55 is provided.

According to the air conditioner equipped with the air filter device 50, by performing a predetermined operation to drive the air filter driving motor 54, the air filter 51 to which dust adheres can be wound up. Since the cleaning operation of the air filter 51 is performed, it is not necessary to remove the air filter 51 and wash it with water.

However, according to the air conditioner provided with the air filter device 50 disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 2000-94947, the cleaning operation of the air filter 51 is automatically performed. Although the labor can be saved, the dust collected in the dust box 56 must be cleaned by humans, and the dust box 56 needs to be cleaned regularly. And time-consuming issues. Disclosure of the invention

In order to solve the above-mentioned problems, the present invention relates to an air conditioner that sucks and exhausts indoor air, wherein the suction nozzle has a suction hole that sucks dust attached to the indoor unit, and is provided in the indoor unit. The said sucking 4 013404 1-3 Equipped with an air intake / exhaust device connected to the intake nozzle and inhaling the air from the intake nozzle, and an exhaust duct connected to this air intake / exhaust device at one end and the other end communicating outside the room It is characterized by.

According to this configuration, by operating the suction and exhaust device, dust attached to the indoor unit is sucked into the suction nozzle through the suction hole together with the air, and the dust sucked from the suction nozzle into the suction and exhaust device together with the air. It is discharged outside through the exhaust duct. As a result, dust adhered to the indoor unit can be automatically discharged to the outside of the room, and the cleaning operation of the dust can be performed without humans, thereby achieving maintenance-free operation.

Further, the present invention provides an intake / exhaust device disposed on a side surface inside an indoor unit, wherein the intake / exhaust device is a centrifugal intake / exhaust fan rotated by an intake / exhaust motor, and a casing accommodating the intake / exhaust fan. And a suction cover provided integrally with the casing on the windward side of the casing, wherein the suction cover has a connection port for a suction duct connected to a suction nozzle and a suction port for a suction / exhaust fan. Is formed so that it is open to one side and faces the outer surface of the suction duct connection port and the outer circumference of the suction port to the suction and exhaust fan when viewed from the side. It is characterized by being formed in.

By using a centrifugal intake / exhaust fan for the intake / exhaust device, low noise can be achieved.In addition, a suction cover is provided integrally with the casing on the windward side of the casing. The suction duct connection port connected to the suction duct and the suction port to the suction / exhaust fan are formed so as to open and face one side, and the outer peripheral part of the suction duct connection port when viewed from the side And the outer periphery of the suction port to the suction / exhaust fan are gently connected to form a flow path. The air containing dust from the duct is sucked into the casing at a good flow rate inside the suction cover and the sucked dust does not stay in a part of the suction cover, and is discharged well outside the room. .

Further, the present invention provides that the casing and the suction cover are formed in a flat shape having a small thickness in the left-right direction while extending vertically and depthwise on the side surface inside the indoor unit. Special.

With this configuration, not only can the casing and the suction cover not be disposed so as not to protrude into the flow path for heat exchange in the indoor unit and cause a problem, and the casing and the suction cover can be accommodated in the compact. Thus, the increase in the size of the indoor unit can be minimized.

Further, the present invention is characterized in that a ventilation opening is formed in the suction cover and an opening / closing means for opening and closing the ventilation opening is provided. With this configuration, when the ventilation opening of the suction cover is opened, the room air that has flowed into the indoor unit is sucked in from the ventilation opening, and is exhausted from the exhaust duct to the outside by the air intake / exhaust device. Thus, when the _c which can be ventilated by discharging the air which has an indoor a dirty outdoors, since the two places or we air and ventilation openings of the suction nozzle sucking the cover so that the sucking exhaust, The load on the centrifugal fan is lighter than when air is sucked and exhausted only from the suction nozzle, and the amount of air exchange can be increased.

Further, the present invention is characterized in that the ventilation opening is formed on the upper part of the suction cover.

According to this configuration, the ventilation opening is located above the suction cover. The ventilation air flows vertically from the top of the suction cover to the casing of the centrifugal fan, so that dust contained in the ventilation air does not stay in the suction cover ゃ casing. Therefore, it is possible to prevent the flow path between the suction cover and the casing from becoming narrow, thereby preventing an increase in airflow resistance, and to maintain a good suction state.

In addition, the present invention is to make the rotation speed of the centrifugal fan different between the time of the dust suction operation in which the ventilation opening is closed and the dust is sucked and the time of the ventilation operation in which the ventilation opening is opened and the room air is sucked. It is characterized in that

According to this configuration, it is possible to realize the optimal exhaust air volume and the ventilation air volume in each of the dust suction operation and the ventilation operation.

Further, the present invention is characterized in that an air filter is arranged facing the suction unit of the indoor unit, and the suction nozzle is configured to be movable in the lateral direction along the air filter along the windward surface of the air filter. And

According to this configuration, the dust adhering to the air filter is sucked into the suction nozzle through the suction hole together with the air by operating the suction and exhaust device while moving the suction nozzle along the windward surface of the air filter. The dust sucked from the suction duct into the suction / exhaust device is discharged outside through the exhaust duct together with the air. As a result, dust from the air filter can be automatically discharged to the outside of the room, and maintenance work can be realized without the need for a person to perform dust cleaning work. Further, even when the air filter has a curved portion or a deformed portion when viewed from the side, the dust of the air filter can be satisfactorily sucked.

Further, the present invention is characterized in that the centrifugal intake and exhaust fan is a sirocco fan. According to this configuration, by using a sirocco fan which is known as a high air volume and low noise type fan, the size of the air intake and exhaust device can be reduced, and the noise can be reduced even at a high speed.

Further, the present invention is characterized in that the centrifugal intake / exhaust fan is a radial fan.

With this configuration, the radial fan can achieve lower noise than the sirocco fan even when the load is large, so that the operation noise of the suction and exhaust device when removing dust from the air filter can be reduced. .

ADVANTAGE OF THE INVENTION According to this invention, the dust which adhered to the indoor unit can be automatically discharged | emitted outside the room, and a maintenance operation | work can be implement | achieved since a dust cleaning operation does not need to be performed by a person. Also, use a centrifugal intake / exhaust fan with a built-in intake / exhaust motor, or provide a suction cover integrally with the casing on the windward side of the casing, and connect the suction cover to the suction duct connected to the suction duct. By forming the port and the suction port to the centrifugal fan so as to face one side, the suction and exhaust device can be configured compactly, and the dust stays in the suction cover casing. It can be discharged to the outside of the room satisfactorily. Brief Description of Drawings

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 of the indoor unit taken along line I-I in Fig. 1, Fig. 3 is a cross-sectional view of the indoor unit taken along line II-II in Fig. 1, and Fig. 4 is an air filter of the indoor unit. Structure for evening and its cleaning mechanism Perspective view,

Fig. 5 is a simplified side view of the air intake and exhaust device provided in the indoor unit, Fig. 6 is a perspective view of the air intake and exhaust device,

Fig. 7 is a schematic front sectional view of the intake and exhaust device,

FIG. 8 is a side sectional view of an indoor unit of an air conditioner according to a second embodiment of the present invention,

FIG. 9 is a perspective view of an intake and exhaust device in the indoor unit of the air conditioner, FIG. 10 is a schematic front sectional view of the intake and exhaust device,

FIG. 11 is a diagram conceptually showing an intake / exhaust device and a control unit in an indoor unit of an air conditioner according to a third embodiment of the present invention,

FIG. 12 is a side sectional view of an air intake / exhaust device of an indoor unit of an air conditioner according to a fourth embodiment of the present invention,

Figure 13 is a cross-sectional view of a conventional air conditioner indoor unit,

FIG. 14 is a perspective view showing a structure of an air filter and a cleaning mechanism of the indoor unit of the conventional air conditioner. Example

Hereinafter, embodiments of the present invention will be described with reference to the drawings. (First embodiment)

As shown in Fig. 1 to Fig. 3, the indoor unit 1 of this air conditioner is provided with a frame 2 forming both side surfaces and a bottom surface, and a mesh filter provided on the front and top surfaces of the indoor unit 1. The main outer shell is composed of an air filter 8 with a large number of parts 8a fitted into the filter frame 8b, and an outer panel 4 attached to the front and upper of the air filter 8 so as to be openable and closable. ing. The top and front parts of the outer panel 4 2004/013404

1-8—Suction units 5 and 6 are formed to suck indoor air, and a blowing unit 7 is formed in the lower front. In the air passage connecting the suction sections 5 and 6 and the blowing section 7 in the indoor unit 1, the heat exchanger 9 including the air filter 8 and the two heat exchangers 9A and 9B and the cross-floor fan are provided. Fan 10 is disposed. Then, the air sucked from the suction sections 5 and 6 by the blower fan 10 passes through the air filter 8, is cooled or heated by the heat exchanger 9, and is blown out from the blowout section 7. One heat exchanger 9A is arranged from above the blower fan 10 to the front so as to surround the blowout part 7, and the other heat exchanger 9B is arranged from the upper part of the blower fan 10 to the rear. Are located. A rear guide 11 is provided near the back of the indoor unit 1 and a stabilizer 12 is provided at the end of the water tray 13 in order to make the air blow by the blower fan 10 smooth. I have. In addition, 14 is a wind direction changing blade.

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

The suction nozzle 16 is formed so as to extend in the depth direction and the vertical direction so as to face the windward surface of the air filter 8, and has a deep end and a lower end formed by the air filter 8. Guide grooves 8c and 8d formed at the upper back end and lower end of filter frame 8b It is guided to move left and right in a posture along the windward side of the air filter. The lower portion of the suction nozzle 16 is screwed to a screw shaft 18 arranged to extend left and right, and the transmission gear 19,

When the screw shaft 18 is driven by the nozzle driving motor 21 via 20, the suction nozzle 16 is moved right and left.

On the surface of the suction nozzle 16 facing the air filter 8, a plurality of suction holes 16 a are formed side by side from the upper surface to the front surface of the air filter 8. It is configured so that dust from the air filter 8 can be sucked through the suction hole 16a.

The suction duct 15 that connects the suction nozzle 16 to the suction duct connection port 31 of the suction / exhaust device 30 is partially bent to allow air suction and exhaust regardless of the position of the air filter 8 in the left-right direction. The suction passage to the device 30 is formed favorably.

As shown in FIGS. 5 to 7, the intake / exhaust device 30 includes a centrifugal intake / exhaust fan 34 driven by an intake / exhaust motor 33,

A mounting board on which a casing 35 accommodating a casing 35, a suction cover 36 provided integrally with the casing 35 on the windward side of the casing 35, and a casing 35 are mounted. 3 7. Then, as shown in FIG. 1 and the like, the intake / exhaust device 30 (the casing 35 of the intake / exhaust device 30 and the suction cover 36) is moved vertically and depthwise on the side surface inside the indoor unit 1. While being extended, it is formed and arranged in a flat shape with a small thickness in the left-right direction. In addition, as shown in FIGS. 5 to 7, the suction cover 36 is connected to the suction duct connection port 31 connected to the suction duct 15 and the suction fan 34. PT / JP2004 / 013404

The inlet port 38 is formed so that both sides are open to one side, and the outer peripheral part 31 a of the suction duct connection port 31 and the intake / exhaust fan 3 4 are viewed from the side. Formed in a flow path shape that smoothly connects the outer peripheral portion 38a of the intake port 38 to the intake port 38 (for example, a crankshaft that looks at the crankshaft connecting pistons of various engines from the side). Have been. In the first embodiment, the outer peripheral portion 31a of the suction duct connection port 31 and the outer peripheral portion 38a of the suction port 38 to the intake / exhaust fan 34 are linearly and smoothly connected. However, the present invention is not limited to this case, and it may be connected more smoothly by a curve. In the first embodiment, in the suction cover 36, the flow path from the suction duct connection port 31 to the suction port 38 to the suction and exhaust fan 34 is arranged so as to extend diagonally upward. Further, the exhaust port provided at the lower portion of the casing 35 is extended in the direction as it is to form an exhaust duct connection port 32, and the exhaust duct connection port 32 is formed.

In this configuration, when cleaning the air filter 8, the suction / exhaust motor 33 and the nozzle driving motor 21 are driven by performing a predetermined operation (for example, pressing a cleaning button). Let it. Then, with the intake / exhaust device 30 operating, the suction nozzle 16 moves along the windward surface of the air filter 8, and at this time, dust adhering to the air filter 8 is sucked together with air into the suction hole. The dust sucked into the nozzle 16 through the 16a, and the dust sucked into the suction / exhaust device 30 from the suction duct 15 is discharged to the outside of the room together with the air through the exhaust duct Γ7. As a result, the dust from the air filter 8 can be automatically discharged to the outside of the room, and the cleaning work of the dust does not need to be performed by a person, thereby achieving a maintenance-free operation. Also, according to the above configuration, the use of the centrifugal intake / exhaust fan 34, which sucks in from the center and exhausts from the outer periphery while utilizing centrifugal force, is used as the intake / exhaust device 30 to reduce noise. be able to. In addition, a suction cover 36 is provided integrally on the windward side of the casing 35, and this suction cover 36 is connected to the suction duct connection port 31 and the suction port 38 of the suction duct 34 to the suction and exhaust fan. The suction duct connection port 31 and the suction port 38 are smoothly connected to each other when viewed from the side. The air containing dust from the suction duct 15 has a good flow velocity in the suction cover 36, and the dust sucked from the air filter 8 does not stay in a part of the suction cover 36. It is sucked into 35 and discharged well out of the room.

In addition, the casing 35 and the suction cover 36 may be formed in a flat shape with a small thickness in the left-right direction, or the suction / exhaust motor 33 may be incorporated in the suction / exhaust fan 34 to arrange the suction. The exhaust device 30 can be compactly housed in the side surface of the indoor unit 1, and it does not protrude into the heat exchange flow path, thereby minimizing the size of the indoor unit 1. Can be suppressed.

Furthermore, by using a sirocco fan known as a high air volume and low noise type fan as the intake / exhaust fan 34, the intake / exhaust device 30 can be reduced in size and rotated at a high speed. Is also suitable for indoor unit 1 because it has low noise.

In addition, by forming the suction nozzle 16 so as to be movable in the horizontal direction along the air filter 8, even when the air filter 8 has a curved portion or a deformed portion in a side view, Air filter 8 dust P2004 / 013404

1-12—Can absorb dust well.

(Second embodiment)

Next, a second embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 8 to 10, the indoor unit 1 in this air conditioner differs from the indoor unit 1 of the first embodiment in the following points. That is, in the indoor unit 1 of the air conditioner, a ventilation opening 40 is formed at a part of the suction cover 36 of the intake / exhaust device 30, here, at the top, and the ventilation opening 40 is formed. An opening / closing body 41 for opening / closing 0 is provided. The opening / closing body 41 is rotated by opening / closing drive means 42 provided with an opening / closing motor or the like.

In the second embodiment, the opening / closing body 41 is substantially horizontal, and the closing position in which the ventilation opening 40 is closed is closed. It is designed to rotate over an open position in which the ventilation opening 40 is opened. Further, the rotation control signal for driving the intake / exhaust fan 34 is the same whether the opening / closing member 41 is in the closed position or the open position.

With this configuration, the opening / closing body 41 is rotated to the open position by driving the opening / closing drive means 42 and the ventilation opening 40 of the suction cover 36 is opened. From the indoor unit 1, the air in the room that has flowed into the indoor unit 1 is sucked in, and the air sucked into the casing 35 from the suction cover 36 by the intake / exhaust fan 34 of the air intake / exhaust device 30 is discharged into the exhaust duct 1 It is discharged outside from room 7. As a result, it is possible to ventilate the room by discharging the air that has become dirty inside the room to the outside.

At this time, air is to be sucked and exhausted from the suction hole 16a of the suction nozzle 16 and the ventilation opening 40 of the suction cover 36. 04 013404

Therefore, as compared with a case in which air is sucked and exhausted only from the suction nozzle 16, there is an advantage that the load on the suction and exhaust fan 34 is lightened and the amount of ventilation air can be increased.

In addition, since the ventilation opening 40 is provided above the suction cover 36, the ventilation air flows vertically through the casing 35 of the suction and exhaust fan 34 from above the suction cover 36. Flows like so. As a result, it is possible to prevent dust and the like contained in the ventilation air from staying in the casing 35 inside the suction cover 36. As a result, it is possible to prevent the flow path in the suction cover 36 and the casing 35 from becoming narrow due to the accumulation of dust, thereby preventing an increase in airflow resistance and maintaining a good suction state.

The ventilation opening 40 may be provided at the front or rear of the suction cover 36.However, in this case, some measures must be taken to prevent dust from staying inside, or cleaning must be performed. Need to be

Further, according to the above configuration, the single suction / exhaust device 30 can perform both the dust suction operation and the ventilation operation. Therefore, each of the dust suction / exhaust device and the ventilation suction / exhaust device is separately provided. Compared to the case where the device is provided, the housing space can be reduced and the manufacturing cost can be reduced.

(Third embodiment)

Next, a third embodiment of the present invention will be described with reference to FIG.

FIG. 11 is a diagram conceptually showing an air intake / exhaust device in an indoor unit of an air conditioner according to a third embodiment of the present invention.

As shown in FIG. 11, the indoor unit 1 of the air conditioner is provided with a control unit 43 that controls the number of rotations of the intake and exhaust motor 33 that rotates the intake and exhaust fan 34. This control unit 4 3 has a ventilation opening 4 PT / JP2004 / 013404

I 14-

'Control so that the number of rotations of the intake / exhaust fan 34 is different between the time of the dust suction operation that closes 0 and sucks dust, and the time of the ventilation operation that opens the ventilation opening 40 and sucks indoor air. . For example, in the dust suction operation, the air is sucked and exhausted only from the suction nozzle 16, and the air is sucked and exhausted compared to the case where air is sucked and exhausted from the suction nozzle 16 and the ventilation opening 40. Since the load on the fan 34 increases, increase the rotation speed of the intake and exhaust fan 34.

According to this configuration, it is possible to realize the optimal exhaust air volume and the ventilation air volume in each of the dust suction operation and the ventilation operation. Therefore, the dust in the air filter 8 can be sucked very well when dust is sucked, and the amount of room air suitable for ventilation can be sucked in the ventilation operation.

In the above case, the case where the number of revolutions of the intake / exhaust fan 34 is set to be higher in the dust suction operation than in the ventilation operation is described, but this is not a limitation, and the suction hole 16 of the suction nozzle 16 is not limited to this. The optimal rotation speed may be set in accordance with the total opening area of the suction opening 36 and the opening area of the ventilation opening 40 of the suction cover 36.

(Fourth embodiment)

Next, a fourth embodiment of the present invention will be described with reference to FIGS.

FIG. 12 is a side sectional view of an indoor unit of an air conditioner according to a fourth embodiment of the present invention.

As shown in FIG. 12, in the indoor unit 1 of the air conditioner, a radial fan is used as the centrifugal intake / exhaust fan 34.

According to this configuration, the radial fan can achieve lower noise than the sirocco fan even when the power and the load are large. PT / JP2004 / 013404

I 15-

The operation noise of the suction / exhaust device 30 when removing dust from the device 8 can be reduced.

When a centrifugal fan such as a sirocco fan or a radial fan is used as the intake / exhaust fan 34, as described above, a plurality of intake / exhaust devices 30 are required in terms of high air volume, low noise, miniaturization, and the like. Although it has an advantage, the present invention is not limited to this, and it is also possible to use an axial flow fan or a mixed flow fan other than the centrifugal type.

Further, in each of the above embodiments, the case where dust is removed from the air filter 8 by moving the suction nozzle 16 has been described. However, the present invention is not limited to this, and the suction force from the suction nozzle 16 is increased. By doing so, it is possible to remove dust from the air filter 8 without moving the suction nozzle 16, and furthermore, it is possible to remove dust adhering to the indoor unit 1 without providing the air filter 8. It is also possible to inhale and discharge it outside the room.

Claims

Range of request

1. An air conditioner that sucks and discharges indoor air, the suction nozzle having a suction hole for sucking dust attached to the indoor unit,

An intake / exhaust device arranged in the indoor unit, connected to the suction nozzle, and sucking air from the suction nozzle;

An air conditioner comprising: an exhaust duct having one end connected to the intake / exhaust device and the other end connected to the outside of the room.

2. The air intake / exhaust device is disposed on a side surface in the indoor unit, the air intake / exhaust device is a centrifugal air intake / exhaust fan rotated by an air intake / exhaust motor, a casing accommodating the air intake / exhaust fan, A suction cover is provided integrally with the casing on the windward side of the casing. The suction cover has a suction port connected to the suction nozzle and a suction port to the suction / exhaust fan on one side. It is formed in such a way that the outer peripheral part of the suction duct connection port and the outer peripheral part of the suction port to the intake / exhaust fan are smoothly connected when viewed from the side. The air conditioner according to claim 1, characterized in that:

3. The casing and the suction cover extend in the vertical direction and the depth direction on the side surface inside the indoor unit, and are formed in a flat shape with a small thickness in the horizontal direction. 3. The air conditioner according to claim 2, wherein:

4. Create a ventilation opening in the suction cover and 3. The air conditioner according to claim 2, further comprising opening / closing means for opening / closing the opening.

5. The air conditioner according to claim 4, wherein the ventilation opening is formed in an upper part of the suction cover.

6. The configuration is such that the number of rotations of the intake / exhaust fan differs between the time of the dust suction operation in which the ventilation opening is closed and the dust is sucked in, and the time of the ventilation operation in which the ventilation opening is opened and the room air is sucked. The air conditioner according to claim 4, wherein:

7-An air filter is arranged facing a suction part of an indoor unit, and a suction nozzle is configured to be movable in a lateral direction along the air filter surface along a surface on the windward side of the air filter. Or the air conditioner according to 2.

8. The air conditioner according to claim 1, wherein the centrifugal intake / exhaust fan is a sirocco fan.

9. The air conditioner according to claim 1 or 2, wherein the centrifugal intake and exhaust fan is a radial fan.