WO2004083735A1 - Air conditioner having indoor unit with automatic air filter-cleaning function - Google Patents

Abstract

Inside an indoor body of an air conditioner are received a heat exchanger and a fan for blowing air that has been subjected to heat exchange in a heat exchanger. An air filter is installed in the body on the upstream side of the heat exchanger. A suction nozzle having a suction opening opposite the air filter and sucking dust adhered to the air filter is slidably installed in the body, a suction/discharge device communicating with the suction nozzle and sucking/discharging the dust with air is provided in the body, and ventilation paths are provided in the suction nozzle.

Description

 Air conditioner with indoor unit with automatic cleaning function of air filter

 The present invention relates to an air conditioner having a function of automatically cleaning an air filter provided at an air inlet of a room unit.

Background art

 As shown in Figs. 15 and 16, the conventional air conditioner has dust particles 1

An air filter 5 for preventing intrusion of dust is provided on the front surface of the heat exchanger 0, and the air filter 5 is configured to be detachable so that attached dust can be cleaned by hand.

 In addition, as an air conditioner that facilitates cleaning of the air filter, a rotating brush, a brush cover that rotatably supports and covers the rotating brush, and a filter brush composed of a pieon provided coaxially with the rotating brush are provided. In some cases, the suction nozzle of the vacuum cleaner is connected to the suction port provided in the brush cover, and is moved over the air filter to suck the dust accumulated on the air filter while scraping it off with a rotating brush. (For example, see Patent Document 1).

 Also, a collecting device, a cleaning device, a suction mechanism, a support beam connected to the suction mechanism, a hose connected to the support beam, a vacuum generator, and a separator disposed on a suction side of the vacuum generator. There is also proposed a device configured to automatically suck dust attached to an air filter and collect the dust by a separator (for example, see Patent Document 2).

 Furthermore, the drive shaft and the driven shaft having a belt-shaped air filter stretched thereon, a servo motor for driving the drive shaft, a brush, a dust sensor and a fan disposed in the exhaust pipe, and the continuous use time of the air filter are reduced. There is also a configuration in which a calculation processing unit for calculating and a control unit are provided, and dust is removed with a brush while rotating a belt-shaped air filter (for example, see Patent Document 3).

-Patent Document 1: Japanese Patent Application Laid-Open No. H11-2226303 (Page 2, FIGS. 1-4) -Patent Document 2: Japanese Patent Application Laid-Open No. Hei 1-175020 (Pages 1 to 9, Fig. 4)

 'Patent Document 3: Japanese Patent Application Laid-Open No. 6-74521 (Page 2, Figure 1)

 With conventional air purifiers equipped with a removable air filter, the air filter is removed from the air conditioner according to the frequency of use of the air conditioner, and the air purifier can be washed with water or with a vacuum cleaner. Cleaning the attached dust was troublesome because regular maintenance was required. If periodic maintenance is not performed, dust accumulates on the air filter and increases the airflow resistance of the intake air, which reduces the performance of the air conditioner and increases power consumption. .

 Further, in the device disclosed in Patent Document 1, every time the air filter is cleaned, an electric sweeper must be taken out, the suction nozzle connected to the suction port of the brush cover, and moved over the air filter. Had the problem that it took time and effort.

 In the case of the filter device described in Patent Document 2, dust attached to the air filter is automatically sucked, but the sucked dust is collected in a separator, so that the dust is periodically separated. It is necessary to remove and accumulate dust accumulated in the air conditioner, and if it is troublesome, if it is not done, the dust attached to the air filter will not be removed, and the ventilation resistance of the intake air will increase and the air conditioner When the performance is lowered or the power consumption is increased, there is a problem.

 Furthermore, in the case of the air conditioner disclosed in Patent Document 3, a long brush that is approximately the same length as the entire width of the air filter is required, and the thickness is increased because the air filter is in a belt shape. There was a problem that the depth size of the main body became large. The present invention has been made in view of the above-mentioned problems of the prior art, and it is extremely easy to clean and maintain an air filter, and to prevent an increase in power consumption while maintaining sufficient performance of an air conditioner. It is an object of the present invention to provide an air conditioner provided with an indoor unit having an automatic cleaning function of an air filter that can perform cleaning.

Disclosure of the invention

In order to achieve the above object, the present invention relates to an air conditioner having an indoor unit in which a heat exchanger and a fan that blows out the air heat exchanged by the heat exchanger into a room are housed in a main body. ^^ An air filter attached to the main body on the upstream side, and the air filter A slidable suction nozzle having a suction port opposed to the filter for sucking dust attached to the air filter, a suction and exhaust device communicating with the suction nozzle to suck and discharge dust with air; A suction duct communicating the device with the suction nozzle is provided, and a plurality of ventilation paths are provided in the suction nozzle.

 With this configuration, the air filter can be cleaned automatically, and an increase in power consumption can be prevented while maintaining sufficient performance of the air conditioner. In addition, a sufficient suction force can be obtained up to the tip of the suction nozzle, and the entire surface of the filter can be evenly cleaned with a small-output suction and exhaust device.

 In addition, among the plurality of ventilation paths, the width of the ventilation path having a large ventilation resistance is increased, the length of the intake port communicating with the ventilation path having the large ventilation resistance is reduced, or each of the plurality of ventilation paths is If a rectifying plate for restricting the ventilation path is provided, the ventilation resistance in the suction nozzle can be made even more uniform, and the dust collection efficiency will be improved.

 Furthermore, if an opening / closing device that sequentially opens and closes a plurality of ventilation paths is provided, it is possible to exhibit strong suction performance with a very small output of the suction / exhaust device.

 In addition, by making the output of the suction / exhaust device variable, the suction power is changed according to the amount of dust adhering to the air filter to suppress the power consumption to the minimum necessary. Even when a ventilation path with high ventilation resistance is created, sufficient cleaning of the air filter can be performed by increasing the suction force only when performing suction cleaning using the ventilation path.

 In addition, the suction nozzle is provided with a partition wall extending between the suction port and the connection part of the suction duct, and the width of the through-hole formed in the partition wall or the area of the plurality of through-holes formed in the partition wall is separated from the connection part. When it is increased in accordance with the formula, dust can be reliably absorbed with a small suction force, and the suction nozzle becomes compact, so that it can be stored in a limited space of the indoor unit without lowering the ventilation performance.

BRIEF DESCRIPTION OF THE FIGURES

 FIG. 1 is a front view of an indoor unit of the air conditioner according to Embodiment 1 of the present invention.

 FIG. 2 is a cross-sectional view taken along line I-I in FIG.

FIG. 3 is a cross-sectional view taken along line Π—Π in FIG. FIG. 4 is a perspective view of a filter device provided in the indoor unit of FIG. FIG. 5 is a longitudinal sectional view of a suction nozzle provided in the filter device of FIG. FIG. 6A is a side view of the suction nozzle provided in the indoor unit of the air conditioner according to Embodiment 2 of the present invention.

 FIG. 6Β is a front view of the suction nose of FIG. 6Α.

 FIG. 7A is a cross-sectional view along a line {_1} in FIG. 6A showing a modification of the suction nozzle.

 FIG. 7A is a sectional view taken along line m-m in FIG. 6A showing another modification of the suction nozzle.

 FIG. 7C is a cross-sectional view taken along line nr-n [in FIG. 6A showing still another modified example of the suction nozzle.

 FIG. 7D is a cross-sectional view along a line IE-II in FIG. 6A showing still another modified example of the suction nozzle.

 FIG. 8 is a perspective view of a filter device provided in an indoor unit of an air conditioner according to Embodiment 3 of the present invention.

 FIG. 9 is a side view of a suction nozzle provided in the filter device of FIG.

 FIG. 10 is a side view showing a modified example of the suction nozzle.

 FIG. 11 is a side view showing another modified example of the suction nozzle.

 FIG. 12 is a side view showing still another modified example of the suction nozzle.

 FIG. 13 is a side view of a suction nozzle provided in an indoor unit of an air conditioner according to Embodiment 4 of the present invention, and particularly shows a state where ventilation passage A is open. FIG. 14 is a side view similar to FIG. 13, and particularly shows a state where the ventilation passage B is open.

 FIG. 15 is a front view of a room unit of a conventional air conditioner.

 FIG. 16 is a cross-sectional view taken along line IV-IV in FIG.

BEST MODE FOR CARRYING OUT THE INVENTION

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Embodiment 1 1 to 3 show an indoor unit of the air conditioner according to the first embodiment of the present invention. FIG. 1 is a front view of the indoor unit, and FIGS. 2 and 3 are each a line in FIG. FIG. 2 is a cross-sectional view taken along line I-I and line Π-Π.

 As shown in FIGS. 1 to 3, inside the indoor unit main body 11, the indoor air is taken in through the heat exchanger 10 and the heat exchange 10, and the air exchanged by the heat exchange 10 is performed. A fan 14 for blowing air into the room and a filter device 1 disposed upstream of the heat exchanger 10 are accommodated, and a plurality of filters formed from the front to the upper surface of the main body 11 are housed. Air is sucked in from the suction port (not shown) by the operation of the fan 14, and dust floating in the air is removed by the filter device 1 provided between the suction port and the heat exchanger 10.

 As shown in FIG. 4, the finoleter device 1 includes a finoleta frame 2, an air filter 5 attached to the

The suction nozzle 4 is slidable (in the horizontal direction: arrow A) and attached to the main body 11 on one side (the lower end in this embodiment) of the filter frame 2 and one end of the suction nozzle 4 keeps airtight. A suction duct 3 slidably connected to the suction duct 3, a suction / exhaust device 6 connected to the suction duct 3 to suck and exhaust dust with air, and one end connected to the suction / exhaust device 6, and the other end open to the outside of the room. An exhaust duct 7 is provided.

 As shown in FIG. 5, the suction nozzle 4 has a vertically elongated middle portion bent and extends in the vertical direction, and a slit-shaped suction port 4 a having a width of 2 to 3 mm is provided on the side facing the air filter 5. Is provided. Further, inside the suction nozzle 4, a plurality (for example, six) of suction ventilation passages 4 b that vertically separate the inside of the suction nozzle 4 are formed. The driving means for sliding the suction nozzle 4 left and right includes a driving wire 8 connected to the suction duct 3 side of the suction nozzle 4 and a driving motor 9 for driving the driving wire 8. .

 Although the air filter 5 shown in FIG. 4 is detachably attached to the filter frame 2, the filter frame 2 may be a part of the main body 11, and the air filter 5 is fixed to the main body 11. However, it is also possible to adopt a configuration that cannot be removed.

The operation of the filter device 1 having the above configuration will be described below. When the suction / exhaust device 6 starts operating after the operation of the air conditioner is stopped, the air starts to be sucked in from the suction port 4 a of the suction nozzle 4 communicating with the suction duct 3. The suction nozzle 4 located at one end of the air filter 5 is slid in the direction of arrow A toward the other end of the air filter 5 by the driving wire 8 connected to the drive motor 9. The dust adhering to the surface of the air filter 5 is sucked and discharged from the exhaust duct 7 to the outside of the room. When the suction nozzle 4 cleans the entire surface of the air filter 5 and reverses the drive motor 9 when it reaches the other end of the air filter 5, the suction nozzle 4 moves in the direction to return to the initial position, It is possible to clean the surface of the air filter 5 again.

 Here, the air sucked into the suction nozzle 4 passes through the plurality of suction air passages 4b provided therein, so that the suction force of the suction nozzle 4 is enhanced, and the dust suction efficiency is improved. That is, when there are no plurality of suction ventilation passages 4 b inside the suction nozzle 4, the wind speed at the suction port 4 a becomes closer to the connection between the suction nozzle 4 and the suction duct 3 (the lower end of the suction nozzle 4). The wind speed (therefore, the air volume is large), the wind speed (air volume) decreases as the distance from the connection between the suction nozzle 4 and the suction duct 3 decreases, but a plurality of suction air passages 4 b are provided inside the suction nozzle 4. With this arrangement, air is almost uniformly sucked into the suction nozzle 4 regardless of the vertical position of the suction port 4a.

Embodiment 2

 6A and 6B show the suction nozzle 4 provided in the indoor unit of the air conditioner according to the second embodiment of the present invention. The suction nozzle 4 has a suction port 4a and a suction port 4a. A partition wall 4c extending in the vertical direction is provided between the connection part of the intake duct 3 and the partition wall 4c.The opening width of the partition wall 4c is small near the connection part of the suction duct 3, and as the distance from the connection part increases. A gradually increasing through hole 4d is formed.

 Other configurations are the same as those in the first embodiment, and a description thereof will not be repeated.

In the present embodiment, when suctioning air from the suction nozzle 4, the through-hole 4 d whose opening width gradually increases upward is formed in the partition wall 4 c inside the suction nozzle 4. The wind speed at 4 a becomes substantially uniform regardless of the distance from the suction duct 3, and the dust adhering to the entire surface of the air filter 5 can be efficiently sucked. Therefore, dust can be reliably absorbed with a small suction force. In addition, the suction nozzle 4 becomes compact, and can be stored in a limited space of the indoor unit without lowering the air blowing performance.

 FIG. 7A shows a modified example of the suction nozzle 4, in which a plurality (for example, three) of the through-holes 4d shown in FIG. The mouth is divided into 4d1.

 FIG. 7B shows another modification of the suction nozzle 4, in which the width of the through-hole 4d2 is gradually increased as the distance from the connection between the suction nozzle 4 and the suction duct 3 increases.

 Further, FIG.7C shows still another modification of the suction nozzle 4, in which the width of the through hole 4d3 is gradually increased as the distance from the connection between the suction nozzle 4 and the suction duct 3 increases. A partition 4e is provided at a portion where the width changes. FIG. 7D shows still another modification of the suction nozzle 4, in which an elliptical through-hole 4d4 is used instead of the rectangular through-hole 4d3 shown in FIG. The distance increases from the connection between the suction nozzle 4 and the suction duct 3. In addition, in the example of FIG. 7A, FIG. 7C or FIG. 7D, a plurality of through holes 4 d 1

(4 d 3 or 4 d 4) is formed, and the area of the through hole increases as the distance from the connection between the suction nozzle 4 and the suction duct 3 increases.

 In addition, it is possible to use a through-hole other than that shown in FIG. 6B or FIGS. 7A to 7D.The opening width or opening area is small near the connection between the suction nozzle 4 and the suction duct 3, and the connection The same effect can be obtained even if any shape is used as long as the shape increases as the distance from the lens increases.

Embodiment 3.

 FIG. 8 shows a filter device 1 provided in an indoor unit of an air conditioner according to Embodiment 3 of the present invention. This filter device 1 is the same as the filter device 1 of Embodiment 1 or 2 described above. The suction nozzle 4 and the suction / exhaust device 6 are connected by a bendable suction duct 15 instead of the suction duct 3 provided at the bottom.

The suction duct 15 has one end connected to the suction and exhaust device 6, and the other end connected to the opposite side surface at the lower end of the suction nozzle 4 when viewed from the suction and exhaust device 6. The middle part is bent in a substantially U-shape. Also, the suction nozzle 4 The guide rails 16 installed at the upper and lower ends of the filter frame 2 allow the air filter 5 to move left and right smoothly with a very small gap.

 In the filter device 1 having the above-described configuration, when the suction bow I exhaust device 6 starts operating, the suction nozzle 4 located at one end side of the air filter 5 is moved by the horse movement wire 8 connected to the drive motor 9 by an arrow. Although it slides in the direction of A, the suction duct 15 that connects the suction nozzle 4 and the suction / exhaust device 6 is configured to bend freely. 5 is bent, and the suction nozzle 4 is always in communication with the bow suction I exhaust device 6 irrespective of its position.

 The length of the suction duct 15 is set so that when the suction nozzle 4 is located on the other end side of the air filter 5, the suction duct 15 can be bent with some room.

 Except for the suction nozzle 4 described below, the other configuration is the same as that of the above-described first or second embodiment, and a description thereof will be omitted.

 FIG. 9 is a cross-sectional view showing the internal structure of the suction nozzle 4 in the present embodiment (a cross-sectional view of the suction nozzle viewed from the air filter 5 side). A suction duct 15 is connected to the lower end of the suction nozzle 4. The actual suction nozzle 4 is bent along the air filter 5 as shown in FIG. 8, but in FIG. 9, the suction nozzle 4 is shown in a straightened state for easy viewing. .

As shown in FIG. 9, the inside of the suction nozzle 4 is separated into a plurality of ventilation passages by a plurality of distribution plates 22 from a slit-shaped suction port 4 a for sucking dust adhered on the air filter 5 and a suction duct. Linked to 15 In the present embodiment, there are four ventilation paths, and the ventilation paths are B, C, and D in order from the ventilation path closer to the suction duct 15. The wind speeds are V _A , V _B , V _c , and V _D , respectively. Since the suction cleaning performance of the air filter 5 largely depends on the wind speed, it is indispensable to equalize the wind speeds V _{A to} V _D and secure a sufficient wind speed. In addition, the widths of the passages of the ventilation paths are assumed to be ta, tb, tc, and td. In the figure, white arrows indicate the flow of wind.

In the nozzle without the diversion plate 2 2, the resistance of the ventilation passage A close to the suction duct 15 is lower than the resistance of the other ventilation passages B, C, and D, so that the wind flow is concentrated in the ventilation passage A. Will be. As a result, the wind speed V _A is the highest, and the wind speed decreases in the order of V _B , V _c , and V _D as approaching the tip of the suction nozzle 4. As described above, the suction performance of dust adhering to the air finleter 5 largely depends on the wind speed of the suction port 4a, so that the cleaning ability decreases toward the tip of the suction nozzle 4. Therefore, in order to provide sufficient suction force even in the ventilation path D at the tip of the suction nozzle 4, the output of the suction bow I Therefore, a large-output sucker I exhaust system is required. Therefore, in the present embodiment, by providing the flow dividing plate 22, the resistance of the ventilation paths A to D is made uniform, and the wind speeds V _{A to} V _D are made uniform. As a result, it is possible to exert a sufficient suction force up to the tip of the suction nozzle 4 even with the low-power bow suction I exhaust device 6.

Although the flow velocity of each of the ventilation passages A to D can be made fairly uniform by the distribution plate 22, the length of the ventilation passage from the suction port 4 a of each of the ventilation passages A to D to the suction duct 15 is still the same. (4) As the air passages A to D at the tip end become longer (that is, in the order of air passages 13, C, B, and A), a difference in airflow resistance between the air passages A to D occurs, so that the wind speeds V _{A to} V _D It is not completely uniform.

Therefore, for the passage widths ta, tb, tc, and td of the ventilation passages A to D, the dimension of the passage width td of the ventilation passage D having the large ventilation resistance is set to be the largest, and the ventilation passage width is set to tc, tb, and ta in the following order. It can be narrow. Since the resistance of the ventilation paths A to D with a large ventilation path width decreases, the wind speeds V _A to V _D should be made more uniform by setting the dimensions of ta, tb, tc, and td to be equal. The suction I exhaust device 6 with a lower output can also exhibit a sufficient suction force up to the tip of the suction nozzle 4.

 Fig. 10 shows a modified example of the suction nozzle 4.By increasing the width of the ventilation passage in the middle of the ventilation passages A to D, which have a large ventilation resistance, the ventilation resistance of the entire ventilation passage can be reduced. Furthermore, even with a small output suction / exhaust device 6, a sufficient suction I force can be exerted up to the tip of the suction nozzle.

FIG. 11 shows another modification of the suction nozzle 4, in which the ventilation resistance in each of the ventilation paths A to D is further reduced. In detail, by providing the flow dividing plate 22, the wind speed of each of the ventilation passages A to D is made almost uniform, but the wind speed in each of the ventilation passages A to D (hereinafter referred to as the wind speed in the ventilation passage) is small. But there is a difference. For example, taking the ventilation path D in Fig. 9 as an example, even in the ventilation path D, the suction duct 15 having a low ventilation resistance, the wind velocity V _D1 near 5 becomes larger than the wind velocity V _{D 2} near the tip of the suction nozzle 4. . In order to suppress such a difference in wind speed as much as possible, it is effective to shorten the opening length of the suction port 4a for each ventilation passage to increase the number of shunts, but in that case, the number of shunt plates 22 also increases. However, since the total ventilation path may be narrowed by the thickness of the plate, which may increase the ventilation resistance, the number of shunts is preferably set as small as possible within the allowable range of the difference in wind speed in the ventilation path.

 By the way, the difference in wind speed in the ventilation path tends to be worse as the thickness of the ventilation path becomes smaller, so it is good if the thickness of the suction nozzle 4 is sufficient, but it is better to store it in the indoor unit. Therefore, when it is necessary to partially reduce the thickness of the suction nozzle 4, the ventilation resistance of the ventilation passage that flows through the thinned portion increases, and the difference in wind speed in the ventilation passage increases. Therefore, in order to keep the difference in air velocity in the ventilation path of the suction nozzle 4 within the allowable range with the minimum number of diversions, suction should be performed only on the ventilation path with a large ventilation resistance, that is, the ventilation path where the suction nozzle 4 becomes thin It is best to reduce the length of mouth 4a.

As shown in Fig. 11, the total length of the suction nozzle 4 is 30 O mm _{s The} thickness t = 8 mm at the tip of the suction nozzle 4 and the thickness t = 12 mm at the suction ducts 1.5 and 5 When the dimensions are set, the ventilation path arranged at the part with the thickness t = 12 mm takes a long intake port 4a of 90 mm (about 2 mm in width) in the branch stream, and the thickness of t = 8 mm It is preferable that the ventilation passage arranged in the section has the intake port 4a in the branch flow as short as 60 mm in length (about 2 mm in width). With such a configuration, it is possible to suppress the difference in wind speed in the ventilation paths A to D while minimizing the ventilation resistance of the entire suction nozzle 4 with the minimum number of branches.

 FIG. 12 shows still another modified example of the suction nozzle 4, in which a rectifying plate for narrowing the ventilation passages is provided in each of the ventilation passages A to D.

More specifically, the above configuration makes it possible to equalize the wind speed of each of the ventilation passages A to D of the suction nozzle 4, but it is possible to secure a necessary number of shunts due to dimensional restrictions of the suction nozzle 4. Flaws may cause a large difference in wind speed in the ventilation path. In this case, as shown in FIG. 12, by providing a rectifying plate 23 for narrowing the ventilation passages A to D for each ventilation passage, it is possible to suppress a difference in wind speed in the ventilation passage.

 As described above, the wind speed near the suction duct 15 is larger than the wind speed near the tip of the suction nozzle 4 due to the difference in ventilation resistance between the ventilation paths A to D. Therefore, by providing a rectifying plate 23 having an opening 24 near the center of each of the ventilation passages A to D, the ventilation resistance in the ventilation passage is made uniform, and the difference in wind speed in the ventilation passage is improved. Needless to say, it is better to set the position of the current plate 23 and the position of the opening 24 to an optimum position according to the shape of the ventilation path. With such a configuration, even with a limited number of shunts, it is possible to suppress the difference in wind speed in the ventilation passages D to D.

Embodiment 4.

 FIG. 13 shows a part of a filter device 1 provided in an indoor unit of an air conditioner according to Embodiment 4 of the present invention, and shows ventilation passages A to D of a suction nozzle 4 shown in FIG. Are provided with a ventilation passage opening / closing device for sequentially opening / closing.

 The ventilation passage opening / closing device is provided at a connection portion between the suction nozzle 4 and the suction duct 15 and opens one of the ventilation passages A to D, while closing the other ventilation passages A to D. And a driven gear 26 provided on the ventilation path switching plate 25, a driving gear 27 mating with the driven gear 26, and a driving means 28 such as a stepping motor for driving the driving gear 27. The ventilation path switching plate 25 is actuated by the driving means 28 via the driving gear 27 and the driven gear 26.

 Fig. 13 shows the ventilation path A opened and the other ventilation ¾B, C, D closed. When the ventilation path switching plate 25 is moved from the position in FIG. 13 to the position in FIG. 14 by the driving means 28, the ventilation path B is opened, and the other ventilation paths A, C, and D are closed. Similarly, the ventilation path C or the ventilation path D can be opened by sliding the ventilation path switching plate 25 by the driving means 28.

Here, the power required by the suction and exhaust device 6 depends on the air volume as represented by the following equation. W = (qe XR) / (6.1 1 8 X φ X TJ)

 w: suction power (w)

qe: Suction air volume (m ³ Zm in)

 R: Ventilation resistance (.mm A q)

 Φ: Suction fan efficiency

 : Suction motor efficiency

 Assuming that the wind speed of each ventilation path A to D is v and the area of the suction port 4a of the suction nozzle 4 is S, the air volume is expressed as qe = vXS, so that the wind speed is maintained and the power of the suction and exhaust device 6 is maintained. The most effective way to reduce this is to reduce the area S of the intake port 4a (that is, restrict the intake port 4a) to reduce the airflow qe.

 In the example shown in Fig. 14, the four air passages A to D are sequentially opened by sliding the air passage switching plate 25 as appropriate, and air is sucked only from one air passage. The air filter 5 can be suction-cleaned over the entire surface with a small air volume.

 More specifically, referring to FIG. 8, only the ventilation path A is first opened, and the suction nozzle 4 is reciprocated along the guide rail 16 to suction-clean the area P1 of the air filter 5. . Next, only the ventilation path B is opened by sliding the ventilation path switching plate 25 by the driving means 28, and the suction nozzle 4 is similarly reciprocated to suction-clean the area P2 of the air filter 5. Similarly, by cleaning the ventilation path and D in order, the area of P3 and P4 of the air filter 5 is suction-cleaned, and the suction cleaning of the entire air filter 5 is completed. In this process, the entire amount of air qe is supplied to only one ventilation path, so that the power required by the suction / exhaust device 6 is extremely small.

Embodiment 5

In the indoor unit, the blowing speed of the air passing through the air filter 5 is not uniform, the wind speed on the front side increases, and the amount of dust adhering to the air filter 5 in that portion also increases. That is, in FIG. 8, the amount of dust adhering to the range of P1 and P2 of the air filter 5 is larger than the range of P3 and P4. Therefore, in the present embodiment, when suction-cleaning the air filter 5 in a portion where a large amount of dust adheres, the output of the suction / exhaust device 6 is increased to ensure that the air filter 5 is cleaned. Exhaust device Increasing the output of 6 is not desirable because it not only increases power consumption but also accelerates the consumption of parts.)

 The following table shows the suction output (suction fan rotation speed) and the suction wind speed for each ventilation path. By setting the suction air speed at the time of suction cleaning of Pl and P2 of the air filter 5 to be 1.2 times the suction air speed at the time of suction cleaning of the P3 and P4 parts, it is possible to reduce the area where dust adheres much. Increases the cleaning ability when cleaning. This function can also be achieved by increasing the suction force only when performing suction cleaning in the ventilation path, even if a ventilation path with high ventilation resistance is unavoidably created in the suction nozzle 4 due to the structure of the indoor unit. It can also be applied when obtaining suction performance.

なお、 上記実施の形態において、 エアフィルタ 5はフィルタ枠 2に着脱自在に 取り付けられているが、 フィルタ枠 2は本体 1 1の一部であってもよく、 エアフ ィルタ 5を本体 1 1に固定し、 着脱できない構成にすることもできる。 しかしな がら、 エアフィルタ 5を本体 1 1に着脱自在に取り付けると、 吸引ノズル 4の吸 引清掃動作では除去できない塵埃、 油などを容易に清掃することができる。 また、 上記実施の形態において、 空気調和機の運転停止後に吸引排気装置 6が 運転を開始するようにしたが、 空気調和機の運転前あるいは運転中に吸弓 I排気装 置 6を運転するようにしてもよい。

In the above embodiment, the air filter 5 is detachably attached to the filter frame 2, but the filter frame 2 may be a part of the main body 11, and the air filter 5 is fixed to the main body 11. However, it is also possible to adopt a configuration that cannot be removed. However, if the air filter 5 is detachably attached to the main body 11, dust, oil, and the like that cannot be removed by the suction cleaning operation of the suction nozzle 4 can be easily cleaned. Further, in the above embodiment, the suction / exhaust device 6 is started to operate after the air conditioner is stopped.However, the suction / exhaust device 6 is operated before or during the operation of the air conditioner. It may be.

Further, in the above-described embodiment, the exhaust duct 7 is connected to the suction / exhaust device 6, and the dust sucked by the suction / exhaust device 6 is discharged to the outside of the room together with the air.However, the exhaust duct 7 is not necessarily required. . In this case, a removable dust collecting case having a dust collecting net is provided in the suction and exhaust device 6, and the dust sucked by the suction and exhaust device 6 is collected by the dust collecting net, while the air sucked together with the dust is sucked and exhausted. Discharged from device 6 The dust collected by the dust collecting net can be removed by removing the dust collecting case from the suction and exhaust device 6.

Claims

An air conditioner having an indoor unit in which a heat exchanger and a fan that blows out the air heat exchanged by the heat exchanger into a room are housed in a main body.  An air filter attached to the main body on the upstream side of the heat exchange, a slidable suction nozzle having a suction port facing the air filter, and slidably sucking dust attached to the air filter; A suction / exhaust device communicating with the suction nozzle and sucking / exhausting dust along with air; and a suction duct communicating the suction / exhaust device and the suction nozzle, wherein a plurality of ventilation paths are provided in the suction nozzle. And air conditioner. 2. The air conditioner according to claim 1, wherein, of the plurality of ventilation paths, a width of a ventilation path having a large ventilation resistance is increased.  3. The air conditioner according to claim 1, wherein a length of a suction port communicating with a ventilation path having a large ventilation resistance is reduced among the plurality of ventilation paths.  4. The air conditioner according to any one of claims 1 to 3, wherein a rectifying plate for narrowing the ventilation passage is provided in each of the plurality of ventilation passages.  5. The air conditioner according to claim 1, further comprising an opening / closing device that sequentially opens and closes the plurality of ventilation paths.  6. The air conditioner according to claim 1, wherein an output of the suction and exhaust device is made variable. 7. An air conditioner having an indoor unit in which a main body contains a heat exchanger and a fan that blows out the air exchanged by the heat exchange into a room,  An air filter attached to the main body on the upstream side of the heat exchange, a slidable suction nozzle having a suction port facing the air filter, and slidably sucking dust attached to the air filter; A suction / exhaust device which communicates with the suction nozzle and sucks / exhausts dust together with air; and a suction duct which communicates the suction / exhaust device with the suction nozzle, wherein the suction nozzle is connected to the suction port and the suction duct. An air conditioner characterized in that a partition extending between the partition and the partition is provided, and the width of a through hole formed in the partition is changed. 8. The width of the through hole is gradually increased with distance from the connection part. The air conditioner according to claim 7, wherein  9. The air conditioner according to claim 7, wherein the width of the through hole is increased stepwise as the distance from the connection portion increases.  10. An air conditioner having an indoor unit in which a heat exchanger and a fan that blows out the air heat exchanged by the heat exchanger into a room are housed in the main body,  An air filter attached to the main body on the upstream side of the heat exchange, a slidable suction nozzle having a suction port facing the air filter, and slidably sucking dust adhered to the air filter; And a suction duct communicating the suction nozzle with the suction nozzle. The suction nozzle communicates the suction nozzle with the suction nozzle, and the suction nozzle has a connection portion between the suction port and the suction duct. An air conditioner, wherein a partition extending between the connecting portions is provided, and the area of the plurality of through-holes formed in the partition increases as the distance from the connecting portion increases.